DMOC205SS
VMOC205SS
SERVICE MANUAL
S14M227DMO205
MICROWAVEOVEN
DMOC205SS
VMOC205SS
MODELS
(VMOC205SSmodelshown)
In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specified
should be used.
WARNING TO SERVICE PERSONNEL: Microwave ovens contain circuitry capable of producing very high voltage and
current. Contact with the following parts may result in a severe, possibly fatal, electrical shock. (Inverter unit that includes
High Voltage Capacitor, High Voltage Power Transformer, High Voltage Rectifier and Heat sink etc., and Magnetron, High
Voltage Harness etc..)
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ................... INSIDEFRONTCOVER
BEFORESERVICING ...................................................................................................... INSIDEFRONTCOVER
WARNINGTOSERVICEPERSONNEL ................................................................................................................2
MICROWAVEMEASUREMENTPROCEDURE(Canada)......................................................................................3
MICROWAVEMEASUREMENTPROCEDURE(USA) ..........................................................................................4
FOREWORDANDWARNING ................................................................................................................................5
PRODUCTSPECIFICATIONS...............................................................................................................................6
GENERAL INFORMATION ...................................................................................................................................6
OPERATION .........................................................................................................................................................8
TROUBLESHOOTINGGUIDE .............................................................................................................................14
TESTPROCEDURE ............................................................................................................................................16
TOUCHCONTROLPANELASSEMBLY .............................................................................................................23
COMPONENTREPLACEMENTANDADJUSTMENTPROCEDURE ..................................................................29
PICTORIALDIAGRAM ........................................................................................................................................36
POWERUNITCIRCUIT .......................................................................................................................................37
PRINTEDWIRINGBOARD .................................................................................................................................38
PARTS LIST ........................................................................................................................................................39
PACKING AND ACCESSORIES .........................................................................................................................44
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
RangeCorporation
111 Front St., Greenwood, MS 38930
Tel: (888) 845-4641
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Notes
1
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WARNING TO SERVICE PERSONNEL
Microwave ovens contain circuitry capable of pro-
ducing very high voltage and current, contact with
following parts may result in a severe, possibly
fatal, electrical shock.
(Example)
High Voltage Capacitor, High Voltage Power
Transformer, Magnetron, High Voltage Rectifier
Assembly, High Voltage Harness etc..
Read the Service Manual carefully and follow all
instructions.
Don't Touch !
Danger High Voltage
outer case.
Before Servicing
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Reconnect the leads to the primary of the power
transformer.
5. Reinstall the outer case (cabinet).
6. Reconnect the power supply cord after the outer case is
installed.
1. Disconnect the power supply cord
remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
, and then
7. Run the oven and check all functions.
WARNING:RISK OF ELECTRIC SHOCK.
DISCHARGE THE HIGH-VOLTAGE
CAPACITOR BEFORE SERVICING.
After repairing
1. Reconnect all leads removed from components during
testing.
2. Reinstall the outer case (cabinet).
3. Reconnect the power supply cord after the outer case is
installed.
The high-voltage capacitor remains charged about 60
seconds after the oven has been switched off. Wait for
60 seconds and then short-circuit the connection of the
high-voltage capacitor (that is the connecting lead of the
high-voltage rectifier) against the chassis with the use of
an insulated screwdriver.
4. Run the oven and check all functions.
Microwave ovens should not be run empty. To test for the
presence of microwave energy within a cavity, place a cup
of cold water on the oven turntable, close the door and set
the power to HIGH and set the microwave timer for two (2)
minutes. When the two minutes has elapsed (timer at zero)
carefully check that the water is now hot. If the water
remains cold carry out Before Servicing procedure and re-
examine the connections to the component being tested.
Whenever troubleshooting is performed the power supply
must be disconnected. It may in, some cases, be necessary
to connect the power supply after the outer case has been
removed, in this event,
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power
transformer.
5. Ensure that the leads remain isolated from other
components and oven chassis by using insulation tape.
6. After that procedure, reconnect the power supply cord.
When all service work is completed and the oven is fully
assembled,themicrowavepoweroutputshouldbechecked
and a microwave leakage test should be carried out.
When the testing is completed,
1. Disconnect the power supply cord, and then remove
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MICROWAVE MEASUREMENT PROCEDURE (CANADA)
After adjustment of the door switches are completed individually or collectively, switch test and microwave leakage test must
be performed with survey instrument and test result must be confirmed to meet the requirement of the performance standard
for microwave ovens as undermentioned.
A. Requirements:
Every microwave oven shall function in such a manner that when the oven is fully assembled and operating with its service
controls and user controls adjusted to yield the maximum output, the leakage radiation, at all points at least 5 cm. from
the
external surface of the oven, does not exceed:
1) 1.0mW/cm2 with the test load of 275 15 ml of water at an initial temperature 20 5oC.
2) 5.0mW/cm2 when the outer enclosure is removed with a test load of 275 15 ml of water at an initial temperature 20 5oC.
3) 5.0mW/cm2 without a test load.
B. Preparation for testing:
Before beginning the actual measurement of leakage, proceed as follows:
1) Make sure that the actual instrument is operating normally as specified in its instruction booklet.
Important:
Survey instruments that comply with the requirement for instrumentation as prescribed by CSA and NHW performance
standard for microwave ovens must be used for testing recommended instruments are , NARDA 8100 and NARDA 8200.
2) Place the oven tray in the oven cavity.
3) Place the load of 275 15 ml of tap water initially at 20 5oC in the center of the oven cavity.
The water container shall be a low form of 600 ml beaker with an inside diameter of approx. 8.5 cm (3-1/2 in.) and made
of an electrically nonconductive material such as glass or plastic.
The placing of this standard load in the oven is important not only to protect the oven, but also to insure that any leakage
is measured accurately.
4) Set the cooking control on Full Power Cooking Mode, Close the door and select a cook cycle of several minutes. If the
water begins to boil before the survey is completed, replace it with 275 ml of cool water.
C. Leakage test with enclosure installed :
1) Grasp the probe of the survey instrument and hold it perpendicular to the gap between the door and the body of the oven.
2) Move the probe slowly, not faster than 2.5 cm/sec. along the gap, watching for the maximum indication on the meter.
3) Check for leakage at the door screen, sheet metal seams and other accessible positions where the continuity of the metal
has been breached (eg., around the switches, indicator, and vents).
While testing for leakage around the door pull the door away from the front of the oven as far as is permitted by the closed
latch assembly.
4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW/cm2,
and that the secondary interlock switch does turn the oven OFF before any door movement.
C. Leakage test without enclosure:
1) Remove the enclosure (cabinet).
2) Grasp the probe of the survey instrument and hold it perpendicular to all mechanical and electric parts of the oven that
is accessible to the user of the oven including, but not limited to, the waveguide, cavity seams, magnetron gap between
the door and the body of the oven.
3) Move the probe slowly, not faster than 2.5 cm/sec. along the gap, watching for the maximum indication on the meter.
4) Measure carefully at the point of highest leakage and make sure that the highest leakage is under 5mW/cm2.
CAUTION: Special attention should be given to avoid electrical shock because HIGH VOLTAGE is generated during this
test
No Load test
1) Operate the oven without a load and measure the leakage by the same method as the above test procedure " Leakage
test with enclosure installed"
2. Make sure that the highest leakage should not exceed 5mW/cm2.
NOTE: After servicing, record data on service invoice and microwave leakage report.
3
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MICROWAVE MEASUREMENT PROCEDURE (USA)
A. Requirements:
1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven
shouldnotexceed1mW/cm2 atanypoint5cmormorefromtheexternalsurfaceoftheoven, measuredpriortoacquisition
by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2 at any point 5cm or more from the external
surface of the oven.
2) Safety interlock switches:
Primary interlock relay switch shall prevent microwave radiation emission in excess of the requirement as above
mentioned. Secondary interlock relay and door sensing switch shall prevent microwave radiation emission in excess
of
5 mW/cm2 at any point 5cm or more from the external surface of the oven.
B. Preparation for testing:
Before beginning the actual measurement of leakage, proceed as follows:
1) Make sure that the actual instrument is operating normally as specified in its instruction booklet.
Important:
Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard for
microwave ovens, 21 CFR 1030.10(c)(3)(i), must be used for testing.
2) Place the oven tray in the oven cavity.
3) Place the load of 275 15 ml (9.8 oz) of tap water initially at 20 5O C (68OF) in the center of the oven cavity.
The water container shall be a low form of 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm (3-1/2 in.)
and made of an electrically nonconductive material such as glass or plastic.
The placing of this standard load in the oven is important not only to protect the oven, but also to insure that any leakage
is measured accurately.
4) Set the cooking control on Full Power Cooking Mode.
5) Close the door and select a cook cycle of several minutes. If the water begins to boil before the survey is completed,
replace it with 275 ml of cool water.
C. Leakage test:
Closed-door leakage test (microwave measurement):
1) Grasp the probe of the survey instrument and hold it perpendicular to the gap between the door and the body of the oven.
2) Move the probe slowly, not faster than 1 in./sec. (2.5 cm/sec.) along the gap, watching for the maximum indication on
the meter.
3) Check for leakage at the door screen, sheet metal seams and other accessible positions where the continuity of the metal
has been breached (eg., around the switches, indicator, and vents).
While testing for leakage around the door, pull the door away from the front of the oven as far as is permitted by the closed
latch assembly.
4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW/cm2,
and that the primary interlock switch/secondary interlock relay does turn the oven OFF before any door movement.
NOTE: After servicing, record data on service invoice and microwave leakage report.
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SERVICE MANUAL
VIKING RANGE CORPORATION
PRODUCTDESCRIPTION
GENERALINFORMATION
OPERATION
MICROWAVE OVENS
DMOC205SS
VMOC205SS
FOREWORD
This Manual has been prepared to provide Viking Service Personnel with
Operation and Service Information for the Viking Microwave Ovens,
DMOC205SS, VMOC205SS.
TROUBLESHOOTINGGUIDEAND
TESTPROCEDURE
It is recommended that service personnel carefully study the entire text of
this manual so that they will be qualified to render satisfactory customer
service.
Check the interlock switches and the door seal carefully. Special attention
should be given to avoid electrical shock and microwave radiation hazard.
TOUCHCONTROLPANEL
WARNING
Never operate the oven until the following points are ensured:
(A) The door is tightly closed.
(B) The door brackets and hinges are not defective.
(C) The door packing is not damaged.
COMPONENTREPLACEMENT
ANDADJUSTMENTPROCEDURE
(D) The door is not deformed or warped.
(E) There is no other visible damage with the oven.
WIRINGDIAGRAM
PARTS LIST
Servicing and repair work must be carried out only by trained service
personnel.
DANGER
Certain initial parts are intentionally not grounded and present a
risk of electrical shock only during servicing. Service personnel
-Donotcontactthefollowingpartswhiletheapplianceisenergized;
High Voltage Capacitor, Power Transformer, Magnetron, High
Voltage Rectifier Assembly, High Voltage Harness;
If provided, Vent Hood, Fan assembly, Cooling Fan Motor.
All the parts marked “*” on parts list are used at voltages more than
250V.
Removal of the outer wrap gives access to voltage above 250V.
All the parts marked “∆” on parts list may cause undue microwave
exposure, by themselves, or when they are damaged, loosened or
removed.
VIKING RANGE CORPORATION
111 Front St., Greenwood, MS 38930
Tel: (888) 845-4641
5
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SPECIFICATION
ITEM
DESCRIPTION
Power Requirements
120 Volts
13.0 Amperes (Microwave) / 13.0 Amperes (Convection)
60 Hertz / Single phase, 3 wire grounded
Power Output
900 watts (IEC 705 Test Procedure)
Operating frequency of 2450MHz
Convection Power Output
Case Dimensions
1450 Watts
Width 24-5/8"
Height 14-7/8"
Height 9-5/8"
Depth 19-1/8"
Depth 16-1/8"
Cooking Cavity Dimensions
(1.5 Cubic Feet )
Width 16-1/8"
Control Complement
Touch Control System
Timer (0 - 99 min. 99 seconds)
Microwave Power for Variable Cooking
Repetition Rate;
P-HI ..........................................Full power throughout the cooking time
P-90 ............................................................ approx. 90% of Full Power
P-80 ............................................................ approx. 80% of Full Power
P-70 ............................................................ approx. 70% of Full Power
P-60 ............................................................ approx. 60% of Full Power
P-50 ............................................................ approx. 50% of Full Power
P-40 ............................................................. approx. 40% of Full Power
P-30 ............................................................. approx. 30% of Full Power
P-20 ............................................................ approx. 20% of Full Power
P-10 ............................................................. approx. 10% of Full Power
P-0 ............................................. No power throughout the cooking time
Convection Temperature for Variable Cooking
CONVECTION .............................................. 100 - 450οF Temp. control
LOW MIX. BAKE .............................. 350οF with 10% microwave power
HIGH MIX. ROAST ........................... 300οF with 30% microwave power
SLOW COOK ........................................ 300οF for 4 hours (no preheat)
BROIL............................................................................450οF (preheat)
Help pad, Reheat pad, Add-A-Minute pad, Popcorn pad
Defrost pad, Sensor Cook pad, Convec Broil pad
Convec Roast pad, Convec Bake pad, Convec pad
Broil pad, Slow Cook pad, Preheat pad.
Number and temperature selection pads, Timer pad, Clock pad
Stop/Clear pad, Power Level pad, Start / Touch On pad
Oven Cavity Light
Safety Standard
Yes
UL Listed
FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
Canadian Standards Association.
Health CANADA, Industry CANADA.
GENERAL INFORMATION
GROUNDING INSTRUCTIONS
This oven is equipped with a three prong grounding plug. It must be plugged into a wall receptacle that is properly installed
and grounded.
In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the
electric current.
WARNING:
Improper use of the grounding plug can result in a risk of electric shock.
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Electrical Requirements
Grounded
Receptacle Box
3-Pronged Plug
The electrical requirements are a 115 -120 volt 60 Hz, AC only,
15 or more amp. fused electrical supply. It is recommended that a
separate circuit serving only this appliance be provided. When installing
this appliance, observe all applicable codes and ordinances.
A short power-supply cord is provided to reduce risks of becoming
entangled in or tripping over a longer cord.
Where a two-pronged wall-receptacle is encountered, it is the personal
responsibility and obligation of the customer to contact a qualified
electrician and have it replaced with a properly grounded three-pronged
wall receptacle or have a grounding adapter properly grounded and
polarized. If an extension cord must be used, it should be a 3-wire, 15
amp. or more cord. Do not drape over a countertop or table where it can
be pulled on by children or tripped over accidentally.
Grounding Pin
3-Pronged Receptacle
CAUTION: DONOTUNDERANYCIRCUMSTANCESCUTORREMOVETHEROUNDGROUNDINGPRONGFROMTHIS
PLUG.
OVEN DIAGRAM
7
1
3
5
10
9
12
13
TOUCHCONTROLPANEL
4
8
14
15
11
6
2
6
7. Wave guide cover.
8. Door open button.
9. Auto-Touch control panel.
10. Lighted digital display.
11. Convection air openings.
1. Ventilation openings. (Rear side)
2. Oven door with see-through window.
3. Oven lamp.
4. Turntable support.
5. Removable turntable.
12. Removable low rack. (Broiling trivet)
13. Removable low rack. (Baking rack)
14. Turntable motor shaft.
The turntable will rotate clockwise or
counterclockwise.
6. Safety door latches.
15. Power supply cord.
The oven will not operate unless the door is
securely closed.
VMOC205SS
7
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OPERATION
DESCRIPTION OF OPERATING SEQUENCE
The following is a description of component functions
during oven operation.
switch are activated with the following results. The
circuits to the turntable motor, the cooling fan motor, and
the high voltage components are de-energized, the
oven lamp remains on, and the digital read-out displays
the time still remaining in the cook cycle when the door
was opened.
OFF CONDITION
Closing the door activates the door sensing switch and
secondary interlock switch. (In this condition, the monitor
switch contacts are opened.)
When oven is plugged in, 117 volts A.C. is supplied to the
control unit. (Figure O-1).
7. Themonitorswitchiselectricallymonitoringtheoperation
of the relay (RY1) and the primary interlock switch and
is mechanically associated with the door so that it will
function in the following sequence.
1. The display will show "WELCOME, PRESS CLEAR".
To set any program or set the clock, you must first touch
the STOP/CLEAR pad. The display will clear, and " : "
will appear.
(1) When the door opens from a closed position, the door
sensing switch and the primary interlock switch open
their contacts, and then the monitor switch contacts
close and then the third door switch contacts open.
(2) When the door is closed from the open position, the
monitor switch contacts open and the third door switch
contacts close first, and then the contacts of the primary
interlock switch and the door sensing switch close.
If the relay (RY1) and the primary interlock switch fail with
their contacts closed when the door is opened, the closing
of the monitor switch contacts will form a short circuit
through the monitor fuse, the relay (RY1) and the primary
interlock switch, causing the monitor fuse to blow.
NOTE: When the door is opened, the oven lamp comes on.
2. A signal is input to the control unit, energizing the coil of
shut-off relay (RY-4). RY4 contacts close, completing a
circuit to the damper motor. The damper motor now
operates moving the damper to the open position,
thereby closing the contacts of the damper switch
inputs a signal to the control unit. The coil of relay RY-
4 is de-energized, opening its contacts, thereby turning
off the damper motor.
COOKING CONDITION
POWER LEVEL P-0 TO P-90 COOKING
Program desired cooking time Variable Cooking Control by
touchingtheNUMBERpadsandthepowerlevelpad. When
the START pad is touched, the following operations occur:
When Variable Cooking Power is programmed, the 117
voltsA.C. issuppliedtothepowertransformerintermittently
through the contacts of relay (RY-2). RY-2 is operated by
the control unit within an varying time base. Microwave
power operation is as follows:
1. The contacts of relays are closed and components
connected to the relays are turned on as follows.
(For details, refer to Figure O-2)
VARI-MODE
ON TIME
32 sec.
OFF TIME
0 sec.
Power 10(P-HI)
(100% power)
RELAY
RY-1
RY-2
RY-3
RY-4
RY-5
RY-6
CONNECTED COMPONENTS
Oven lamp/Turntable motor
Power transformer
Heating element
Power 9(P-90)
30 sec.
2 sec.
(approx. 90% power)
Power 8(P-80)
(approx. 80% power)
Power 7(P-70)
26 sec.
24 sec.
6 sec.
8 sec.
Damper motor
Convevtion motor
(approx. 70% power)
Fan motor
Power 6(P-60)
(approx. 60% power)
22 sec.
18 sec.
16 sec.
12 sec.
8 sec.
10 sec.
14 sec.
16 sec.
20 sec.
24 sec.
26 sec.
32 sec.
2. 117 volts A.C. is supplied to the primary winding of the
power transformer and is converted to about 3 volts A.C.
output on the filament winding, and approximately 2360
volts A.C. on the high voltage winding.
3. The filament winding voltage heats the magnetron
filament and the H.V. winding voltage is sent to a voltage
doubler circuit.
4. The microwave energy produced by the magnetron is
channelled through the waveguide into the cavity feed-
box, and then into the cavity where the food is placed to
be cooked.
5. Upon completion of the cooking time, the power
transformer, oven lamp, etc. are turned off, and the
generation of microwave energy is stopped. The oven
will revert to the OFF condition.
Power 5(P-50)
(approx. 50% power)
Power 4(P-40)
(approx. 40% power)
Power 3(P-30)
(approx. 30% power)
Power 2(P-20)
(approx. 20% power)
Power 1(P-10)
(approx. 10% power)
6 sec.
Power 0(P-0)
(0% power)
0 sec.
Note: The ON/OFF time ratio does not correspond with
the percentage of microwave power, because
approx. 2 seconds are needed for heating of the
magnetron filament.
6. When the door is opened during a cook cycle, third door
switch, monitor switch, door sensing switch, the
secondary interlock relay and the primary interlock
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first. And then program desired cooking time by touching
the Number pads. The LOW MIX/BAKE pad is
preprogrammed for 350οF with 10% microwave power,
while the HIGH MIX/ROAST pad is preprogrammed for
300οF with 30% microwave power. When the START pad is
touched, the following operations occur:
1. The numbers on the digital read-out start to count down
to zero.
2. The shut-off relays (RY1,RY2,RY3,RY5 and RY6) are
energized, turning on the oven lamp, turntable motor,
cooling fan motor and convection fan motor.
3. The shut-off relay (RY4) is energized.
The damper door is closed from the open position.
4. The heater relay (RY3) is energized, applying the main
supply voltage to the heating element.
5. Now, the oven is in the convection cooking condition.
6. When the oven temperature reaches the selected
temperature, the following operations occur:
6-1. The power supply voltage is alternated to the
heating element and power transformer.
CONVECTION COOKING CONDITION
PREHEATINGCONDITION
Program desired convection temperature by touching the
CONVECTION pad and the Temperature pad.
When the START pad is touched, the following operations
occur:
1. The coil of shut-off relays (RY1, RY3,RY5 and RY6) are
energized, the oven lamp, cooling fan motor, turntable
motor and convection motor are turned on.
2. The coil of relay (RY4) is energized by the control unit.
Thedamperismovedtotheclosedposition, openingthe
damper switch contacts. The opening of the damper
switch contacts sends a signal to the LSI on the control
unit de-energizing the relay (RY4) and opening the
circuit to the damper motor.
3. The coil of heater relay (RY3) is energized by the control
unit and the main supply voltage is applied to the heating
element.
4. Whentheoventemperaturereachestheselectedpreheat
temperature, the following operations occur:
4-1 The heater relay is de-energized by the control unit
temperature circuit and thermistor, opening the
circuit to the heating element.
6-2. The heating element operates through the heater
relay (RY3) contacts and the power transformer
operates through the primary interlock relay (RY2)
contacts.
6-3. These are operated by the control unit to supply
alternatelywithina32secondtimebase,convection
heat and microwave energy.
4-2. The oven will continue to function for 30 minutes,
turning the heater on and off, as needed to maintain
the selected preheat temperature. The oven will
shut-down completely after 30 minutes
The relationship between the convection and microwave
power operations are as follows.
CONVECTION COOKING CONDITION
Whenthepreheattemperatureisreached,abeepsignalwill
sound indicating that the holding temperature has been
reached in the oven cavity. Open the door and place the
food to be cooked in the oven.
Touch the CONVEC pad first and then touch the Tempera-
turepad. Andprogramdesiredcookingtimebytouchingthe
Number pads.
Note: The ON and OFF time ratio does not correspond
with the percentage of microwave power, because
approx. 2 seconds are needed for heating of the
magnetron filament.
6 SEC.
26 SEC.
ON
MICROWAVE POWER
= APPROX. 10%
When the START pad is touched, the following operations
occur:
(MICRO.)
OFF
1. The numbers on the digital read-out start to count down
to zero.
2. The oven lamp, turntable motor, cooling fan motor and
convection motor are energized.
CONVECTION
TEMPERATUE
= 350°F (180°C)
(CONVEC.)
LOW MIX
BAKE
3. Heaterrelay(RY3)isenergized(ifthecavitytemperature
is lower than the selected temperature) and the main
supply voltage is applied to the heating element to return
to the selected cooking temperature.
12 SEC.
20 SEC.
ON
MICROWAVE POWER
= APPROX. 30%
(MICRO.)
OFF
ON
4. Upon completion of the cooking time, the audible signal
will sound, and oven lamp, turntable motor, cooling fan
motor and convection motor are de-energized. At the
end of the convection cycle, if the cavity air temperature
is above 275οF, the circuit to RY6 will be maintained (by
thethermistorcircuit)tocontinueoperationofthecooling
fan motor until the temperature drops below 245οF, at
which time the relay will be de-energized, turning off the
fan motor. Relay RY5 will however, open as soon as the
convection cycle has ended, turning off the convection
fan motor.
5. At the end of the convection cook cycle, shut-off relay
(RY4) is energized turning on the damper motor. The
damper is returned to the open position, closing the
damper switch contacts which send a signal to the
control unit, de-energizing shut-off relay (RY4).
(CONVEC.)
CONVECTION
TEMPERATUE
= 300°F
OFF
32 SEC.
HIGH MIX
ROAST
Note: During alternate Microwave/Convection operation,
the convection heater is energized only if the cavity
temperature drops below the set temperature.
SENSOR COOKING CONDITION
Using the SENSOR COOK function, the foods are cooked
without figuring time, power level or quantity. When the
oven senses enough steam from the food, it relays the
information to its microprocessor which will calculate the
remaining cooking time and power level needed for best
results.
AUTOMATIC MIX COOKING CONDITION
Touch the HIGH MIX/ROAST or the LOW MIX/BAKE pad
When the food is cooked, water vapor is developed.
9
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The sensor “senses” the vapor and its resistance increases
gradually. When the resistance reaches the value set
according to the menu, supplementary cooking is started.
Thetimeofsupplementarycookingisdeterminedbyexperi-
ment with each food category and inputted into the LSI.
An example of how sensor works:
4. Now, the oven is in the convection cooking mode.
5. Whentheoventemperaturehasreachedtheprogrammed
convection temperature, the oven goes into the
programmed cooking mode.
6. At the end of the COMPU BROIL/ ROAST/ BAKE cycle,
the damper is returned to the open position and the oven
will go to the off condition. The cooling fan will remain on
until the oven has cooled.
1. Potatoes
temperature.
at
room
COMPU DEFROST COOKING
Vapor is emitted very slowly.
M
ICROW
AVE
The COMPU DEFROST key is a special function key to
defrost meats and poultry faster and better. COMPU DE-
FROST automatically defrosts roast beef, etc.. When the
COMPU DEFROST is selected and the food weight is
entered by using the COMPU DEFROST pad, the oven will
cook according to the special cooking sequence.
2. Heat potatoes. Moisture and
humidity is emitted rapidly.
You can smell the aroma as it
cooks.
M
ICROW
AVE
AH SENSOR
3. Sensor detects moisture and
humidity and calculates
cooking time and variable
power.
FIRE SENSING FEATURE (MICROWAVE MODE)
This model incorporates a sensing feature which will stop
theoven'soperationifthereisafireintheovencavityduring
microwave cooking.
This is accomplished by the LSI repeatedly measuring the
voltage across the temperature measurement circuit (ther-
mistor) during it's 32-seconds time base comparing the
obtained voltage measurements. If the most recent voltage
measured is 300mV greater than the previous voltage
measured, the LSI judges it as a fire in the oven cavity and
switches off the relays to the power transformer, fan motor
and convection motor. The LSI also stops counting down
andclosesthedamperdoorsothatnofreshairwillenterthe
oven cavity. Please refer to the following section for a more
detailed description.
CookingSequence.
1. Touch SENSOR COOK pad.
NOTE: The oven should not be operated on SENSOR
COOK immediately after plugging in the unit. Wait
two minutes before cooking on SENSOR COOK.
2. Select desired Sensor setting.
3. Touch START pad.
The coil of shut-off relay (RY1, RY6) is energized, the
oven lamp and cooling fan motor are turned on, but the
power transformer is not turned on.
4. After about 16 seconds, the cook relay (RY-2) is
energized. The power transformer is turned on,
microwave energy is produced and first stage is started.
The 16 seconds is the cooling time required to remove
any vapor from the oven cavity and sensor.
Operation
Please refer to the timing diagrams below.
1. The thermistor operates within a 32-seconds time base
and it is energized for three (3) seconds and off for 29
seconds. Two (2) seconds after the thermistor is
energized, the voltage across the temperature
measurement circuit is sampled by the LSI and twenty
one (21) seconds after the thermistor is cut off the LSI
turns on the cooling fan for six (6) seconds.
2. The above procedure is repeated. If the difference
between the first voltage measured (in step 1) and the
voltage measured when the procedure is repeated (step
2) is greater than 300mV the LSI makes the judgment
that there is a fire in the oven cavity and will switch off
the relays to the power transformer, fan motor and
convection motor. The LSI also stops counting down
and closes the damper door so that no fresh air will enter
the oven cavity.
NOTE: During this first stage, do not open the door or
touch STOP/CLEAR pad.
5. When the sensor detects the vapor emitted from the
food, the display switches over to the remaining cooking
time and the timer counts down to zero. At this time, the
door may be opened to stir food, turn it or season, etc.
6. When the timer reaches zero, an audible signal sounds.
The shut-off relay and cook relay are de-energized and
the power transformer, oven lamp, etc. are turned off.
7. OpeningthedoorortouchingtheSTOP/CLEARpad,the
time of day will reappear on the display and the oven will
revert to an OFF condition.
COMPU BROIL/ COMPU ROAST/ COMPU BAKE
COMPU BROIL/ ROAST/ BAKE will automatically compute
the oven temperature, microwave power and cooking time
forbaking, roastingandbroiling. Setthedesiredprogramby
touching the COMPU BROIL/ ROAST/ BAKE pad, and
number pad. Enter the weight by touching the Number
pads. When the START pad is touched, the following
operations occur:
3. Once the fire sensor feature has shut the unit down, the
programmedcookingcyclemayberesumedby pressing
the"START"padortheunitmayberesetbypressingthe
"CLEAR" pad.
0
2 3
24
30 32 (sec.)
64 (sec.)
6 sec.
CONVECTION
MOTOR
ON
1. The COOK indicator will light and the Convection Fan
Symbol will rotate.
OFF
3 sec.
2. The cooking time will appear on the display and start
counting down to zero. The cooking time is adjusted
automatically according to the weight of the food.
3. The shut-off relays (RY1, RY5 and RY6) are energized,
turning on the oven lamp, turntable motor, cooling fan
motor and convection motor. The power supply voltage
is applied to the heating element.
THERMISTOR
ON
OFF
ON
Sensing
Voltage
OFF
Sensing the voltage across temperature measurement circuit.
10
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DMOC205SS
VMOC205SS
IMPORTANT:
detected vapors and initiated a sensor cooking cycle.
This is because the operation of the convection fan
would interfere with the AH sensor's vapor detection.
During sensor cooking operation, the fire sensing op-
eration sequence will not begin until the AH sensor has
SCHEMATIC DIAGRAM
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. CLOCK APPEARS ON DISPLAY.
CONV.
THERMAL
CUT-OUT
MAGNETRON OVEN
THERMAL
CUT-OUT
THERMAL
CUT-OUT
NOISE FILTER
COM.
(RY1)
A5
A3
A1
N.O.
(RY1)
CM
TTM
POWER
TRANSFORMER
COM.
(RY3)
A-7
A-9
FM
DM
OL
RY2
COM.
(RY2)
SECONDARY
INTERLOCK
RERAY
RY3
N.O.
(RY2)
CONTROL UNIT
CAPACITOR
0.94µ
N.O.
(RY3)
F-3
F-2
F-1
E-1 E-2 E-3 E-4 E-5 E-6
117V
60Hz
DOOR
SENSING
SWITCH
THER-
MISTOR
DAMPER
SWITCH
AH SENSOR
THIRD DOOR
SWITCH
Figure O-1. Oven Schematic-OFF Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. “START” PAD TOUCHED.
CONV.
THERMAL
CUT-OUT
MAGNETRON OVEN
THERMAL
CUT-OUT
THERMAL
CUT-OUT
NOISE FILTER
COM.
(RY1)
A3
A5
A1
N.O.
(RY1)
CM
TTM
POWER
TRANSFORMER
COM.
(RY3)
A-7
A-9
FM
DM
OL
RY2
COM.
(RY2)
SECONDARY
INTERLOCK
RERAY
RY3
N.O.
(RY2)
CONTROL UNIT
CAPACITOR
0.94µ
N.O.
(RY3)
F-3
F-2
F-1
E-1 E-2 E-3 E-4 E-5 E-6
117V
60Hz
DOOR
SENSING
SWITCH
THER-
MISTOR
DAMPER
SWITCH
AH SENSOR
THIRD DOOR
SWITCH
Figure O-2. Oven Schematic-Microwave Cooking Condition
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DMOC205SS
VMOC205SS
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. MIX COOKING PAD TOUCHED.
3. COOKING TIME PROGRAMMED.
4. “START” PAD TOUCHED.
5. RY2 AND RY3 WILL ALTERNATELY CLOSE.
DURING COOK CYCLE.
CONV.
THERMAL
CUT-OUT
MAGNETRON OVEN
THERMAL
CUT-OUT
THERMAL
CUT-OUT
NOISE FILTER
COM.
(RY1)
A3
A5
A1
N.O.
(RY1)
CM
TTM
POWER
TRANSFORMER
COM.
(RY3)
A-7
A-9
FM
DM
OL
RY2
COM.
(RY2)
SECONDARY
INTERLOCK
RERAY
RY3
N.O.
(RY2)
CONTROL UNIT
CAPACITOR
0.94µ
N.O.
(RY3)
F-3
F-2
F-1
E-1 E-2 E-3 E-4 E-5 E-6
117V
60Hz
DOOR
SENSING
SWITCH
THER-
MISTOR
DAMPER
SWITCH
AH SENSOR
THIRD DOOR
SWITCH
Figure O-3. Oven Schematic-Automatic Mix Cooking Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. CONVECTION PAD TOUCHED.
3. DESIRED TEMP. TOUCHED.
4. COOKINGTIMEPROGRAMMED.
5. “START” PAD TOUCHED.
CONV.
THERMAL
CUT-OUT
MAGNETRON OVEN
THERMAL
CUT-OUT
THERMAL
CUT-OUT
NOISE FILTER
COM.
(RY1)
A3
A5
A1
N.O.
(RY1)
CM
TTM
POWER
TRANSFORMER
COM.
(RY3)
A-7
A-9
FM
DM
OL
RY2
COM.
(RY2)
SECONDARY
INTERLOCK
RERAY
RY3
N.O.
(RY2)
CONTROL UNIT
CAPACITOR
0.94µ
N.O.
(RY3)
F-3
F-2
F-1
E-1 E-2 E-3 E-4 E-5 E-6
117V
60Hz
DOOR
SENSING
SWITCH
THER-
MISTOR
DAMPER
SWITCH
AH SENSOR
THIRD DOOR
SWITCH
Figure O-4. Oven Schematic-Convection Cooking Condition
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DESCRIPTION AND FUNCTION OF COMPONENTS
DOOR SENSING AND PRIMARY INTERLOCK
THIRD DOOR SWITCH
SWITCHES
The switch is activated by the latch heads, while the door
is closed. When the door is opened, the switch interrupt the
circuittothepowertransformer. Thisswitchpreventspower
transformerengagingandmicrowavewhenthedooropened.
The door sensing switch in the secondary interlock system
is mounted in the upper position on the latch hook, the
primary interlock switch is mounted in the lower position on
the latch hook. They are activated by the latch heads on the
door. When the door is opened, the switches interrupt the
circuit to all components. A cook cycle cannot take place
until the door is firmly closed thereby activating both
interlockswitches.Thesecondaryinterlocksystemconsists
of the door sensing switch and secondary interlock relay
located on the control circuit board.
THERMISTOR
The thermistor is a negative temperature coefficient type.
The temperature in the oven cavity is detected through the
resistance of the thermistor, and then the control unit
causes the heater relay to operate, thus the current to the
heating element is turned ON/OFF.
LATCH HOOK
MAGNETRON THERMAL CUT-OUT
THIRD DOOR SWITCH
The thermal cut-out located on the waveguide is designed
to prevent damage to the magnetron if an over heated
condition develops in the magnetron due to cooling fan
failure, obstructed air guide, dirty or blocked air intake, etc.
Undernormaloperation,thethermalcut-outremainsclosed.
However, when abnormally high temperatures are reached
within the magnetron, the thermal cut-out will open at 257οF
(125οC) causing the oven to shut down. magnetron thermal
cut-out is not reset at room temperature.
DOOR SENSING
SWITCH
MONITOR SWITCH
LATCH
HEADS
PRIMARY
INTERLOCK SWITCH
SWITCH LEVER
OPEN LEVER
OVEN THERMAL CUT-OUT
DOOR OPEN
BUTTON
The thermal cut-out located on the side of the steam duct
is designed to prevent damage to the unit if the foods in the
oven catch fire due to over heating produced by improper
setting of cooking time or failure of control unit.
Undernormaloperation,thethermalcut-outremainsclosed.
However, when abnormally high temperatures are reached
within the oven cavity, the thermal cut-out will open at 302οF
(150οC) causing the oven to shut down.
Figure D-1. Door sensing switch, monitor switch, third
door switch and primary interlock switch
MONITOR SWITCH
The monitor switch is mounted on the middle position of
latch hook. It is activated (the contacts opened) by the lower
latch head while the door is closed. The switch is intended
to render the oven inoperative by means of blowing the
monitor fuse when the contacts of the relay RY1 and
primary interlock switch fail to open when the door is
opened.
When the thermal cut-out has cooled, the thermal cut-out
closes at 266οF (130οC)
CONV. THERMAL CUT-OUT
The thermal cut-out located on the left side of the thermal
protection plate (left) is designed to prevent damage to the
heater unit if an over heated condition develops in the tube
due to cooling fan failure, obstructed air ducts, dirty or
blocked air intake, etc.
Undernormaloperation,thethermalcut-outremainsclosed.
However, when abnormally high temperatures are reached
within the heater unit, the thermal cut-out will open at 302οF
(150οC) causing the oven to shut down.
Functions:
1. When the door is opened, the monitor switch contact
close (to the ON condition) due to their being normally
closed. At this time the door sensing and primary
interlockandthirddoorswitchesareintheOFFcondition
(contacts open) due to their being normally open contact
switches.
2. As the door goes to a closed position, the monitor
switch contacts are first opened and then the door
sensingswitch,thirddoorswitchandtheprimaryinterlock
switch contacts close. (On opening the door, each of
these switches operate inversely.)
3. If the door is opened, and the relay RY1 and the primary
interlock switch contacts fail to open, the monitor fuse
blows simultaneously with closing of the monitor switch
contacts.
When the thermal cut-out has cooled, the thermal cut-out
closes at 266οF (130οC)
HEATING ELEMENT
The heating element is located at the left side of the oven
cavity. It is intended to heat air driven by the convection fan.
The heated air is kept in the oven and force-circulated and
reheated by the heating element.
CAUTION: BEFORE REPLACING A BLOWN MONITOR
FUSE TEST THE DOOR SENSING SWITCH,
PRIMARYINTERLOCKSWITCH,RELAY(RY1)
AND MONITOR SWITCH FOR PROPER OP-
ERATION.(REFERTOCHAPTER“TESTPRO-
CEDURE”).
CONVECTION COOKING SYSTEM
This oven is designed with a hot air heating system where
food is not directly heated by the heating element, but is
heated by forced circulation of the hot air produced by the
heating element.
The air heated by the heating element is circulated through
the convection passage provided on the outer casing of the
NOTE: MONITOR FUSE AND MONITOR SWITCH ARE
REPLACED AS AN ASSEMBLY.
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oven cavity by means of the convection fan which is driven
by the convection motor. It then enters the inside of the
oven through the vent holes provided on the left side of the
oven. Next, the hot air heats the food on the turntable and
leaves the oven cavity through the vent in the center of the
oven cavity left side wall.
Without leaving the oven, this hot air is reheated by the
heating element, passes through the convection passage
and enters the inside of the oven cavity again, in a
continuing cycle.
1-3. When the damper is moved to the open position by
the damper cam the damper switch is closed (ON
position).
1-4. The signal from damper switch is re-sensed in the
control unit and shut-off relay (RY4) is turned off.
1-5. The 120 volts A.C. to the damper motor is removed
and the motor turns off.
2. When oven is microwave cooking:
Damper is in the open position.
3. When oven is convection cooking:
In this way, the hot air circulates inside the oven cavity to
raise its temperature and, at the same time, comes into
contact with the food being cooked.
When the temperature inside the oven cavity reaches the
selected temperature, the heating element is de-energized.
When the temperature inside the oven cavity drops below
the selected temperature, the heating element is energized
again. Inthisway, theinsideoftheovencavityismaintained
at approximately the selected temperature.
3-1. Damper motor is energized by touching the
convection, temperature and START pads.
3-2. When damper is in the closed position (damper
switch is OFF), its signal is sensed by the control
unit, and shut-off relay (RY4) is de-energized.
3-3. The damper is held in the closed position during the
convection cooking operation.
3-4. At the end of the convection cooking, shut-off relay
(RY4) is energized, and the damper is returned to
the open position.
When the convection time reaches 0, the heating element
is de-energized and the convection fan stops operating and
the oven shuts off.
NOTE: If the damper door is not in the proper position,
closedduringconvectionoropenduringmicrowave,
the control unit will stop oven operation after 1
minute.
DAMPER OPEN-CLOSE MECHANISM
Usually, the damper is in the open position except during
convection cooking. Damper position is set automatically
by damper motor, damper switch, motor cam and damper
shaft. These components are operated by a signal that
judges if microwave cooking or convection cooking opera-
tion is selected by the control unit.
Figure D-2. Damper Mechanism
Microwave Cooking:
Damper is in the open position, because a portion of cooling
air is channelled through the cavity to remove steam and
vapors given off from the heating foods.
It is then exhausted at the top of the oven cavity into a
condensation compartment.
DAMPER SHAFT
Convection Cooking:
DAMPER DUCT
DAMPER
Damper is in the closed position, so that no hot air will be
allowed to leak out the oven cavity.
Damper Operation
DAMPER CAM
1. When power supply cord is plugged in:
1-1. When power supply cord is plugged in, a signal is
sensed in the control unit, and operates shut-off
relay (RY4).
DAMPER SWITCH
DAMPER MOTOR
1-2. Contacts of shut-off relay (RY4) close, the damper
motor is energized, opening the damper door.
TROUBLESHOOTING GUIDE
When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many
of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure letter which
will be found in the “Test Procedure”section.
IMPORTANT: If the oven becomes inoperative because of a blown monitor fuse, check the monitor switch, relay (RY1),
door sensing switch and primary interlock switch before replacing the monitor fuse. If monitor fuse is
replaced, the mintor switch must also be replaced at the same time. Use part FFS-BA012WRK0 as an
assembly.
14
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DMOC205SS
VMOC205SS
(SENSOR
COOKING)
CONDITION
OFFCONDITION
COOKINGCONDITION
(MICROWAVE)
(CONVECTION)
PROBLEM
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
A
B
C
D
E
F
MAGNETRON
POWER TRANSFORMER
H.V. RECTIFIER ASSEMBLY
HIGH VOLTAGE CAPACITOR
PRIMARY INTERLOCK SWITCH
SECONDARY INTERLOCK SYSTEM
MONITOR SWITCH
MONITOR FUSE
G
H
E
I
THIRD DOOR SWITCH
THERMAL CUT-OUT
CONVECTION HEATER
THERMISTOR
J
K
L
DAMPER MOTOR
M
P
Q
R
R
R
R
R
R
T
DAMPER SWITCH
TOUCH CONTROL PANEL
KEY UNIT
RELAY RY-1
RELAY RY-2
RELAY RY-3
RELAY RY-4
RELAY RY-5
RELAY RY-6
FOIL PATERN ON PWB.
AH SENSOR
U
Replace OVEN LAMP OR SOCKET
Replace FAN MOTOR
Replace TURNTABLE MOTOR
Replace CONVECTION MOTOR
Check LOOSE WIRING
Check SHORTED IN POWER CORD
Check NO POWER AT OUTLET
Check LOW VOLTAGE
O
NOISE FILTER
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DMOC205SS
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TESTPROCEDURES
COMPONENTTEST
PROCEDURE
LETTER
A
MAGNETRONASSEMBLYTEST
HIGH VOLTAGES ARE PRESENT DURING THE COOK CYCLE, SO EXTREME CAUTION SHOULD
BE OBSERVED.
DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS
OR WIRING.
To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check
across the magnetron filament leads should indicate less than 1 ohm.
To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads
and chassis ground. This test should indicate an infinite resistance. If there is little or no resistance the
magnetron is grounded and must be replaced.
Power output of the magnetron can be measured by performing a water temperature rise test. This test
should only be used if above tests do not indicate a faulty magnetron and there is no defect in the
following components or wiring: silicon rectifier, high voltage capacitor and power transformer. This test
will require a 16 ounce (453cc) measuring cup and an accurate mercury thermometer or thermocouple
type temperature tester. For accurate results, the following procedure must be followed carefully:
1. Fill the measuring cup with 16 oz. (453cc) of tap water and measure the temperature of the water
with a thermometer or thermocouple temperature tester. Stir the thermometer or thermocouple
through the water until the temperature stabilizes. Record the temperature of the water.
2. Place the cup of water in the oven. Operate oven at POWER HI(HIGH) selecting more than 60
seconds cook time. Allow the water to heat for 60 seconds, measuring with a stop watch, second
hand of a watch or the digital read-out countdown.
3. Remove the cup from the oven and again measure the temperature, making sure to stir the
thermometer or thermocouple through the water until the maximum temperature is recorded.
4. Subtract the cold water temperature from the hot water temperature. The normal result should be
22 to 43οF(12.2 to 23.8οC) rise in temperature. If the water temperatures are accurately measured
and tested for the required time period the test results will indicate if the magnetron tube has low
power output (low rise in water temperature) which would extend cooking time or high power output
(high rise in water temperature) which would reduce cooking time. Because cooking time can be
adjusted to compensate for power output, the magnetron tube assembly should be replaced only if
the water temperature rise test indicates a power output well beyond the normal limits. The test is
only accurate if the power supply line voltage is 117 volts and the oven cavity is clean.
B
POWERTRANSFORMERTEST
DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS
OR WIRING.
Disconnect the primary input terminals and measure the resistance of the transformer with an
ohmmeter. Check for continuity of the coils with an ohmmeter. On the R x 1 scale, the resistance of the
primary coil should be less than 1 ohm and the resistance of the high voltage coil should be
approximately 84.4 ohms; the resistance of the filament coil should be less than 1 ohm.
(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO
MEASURE THE FILAMENT AND HIGH VOLTAGE.)
C
HIGH VOLTAGE RECTIFIER TEST
DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS
OR WIRING.
Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance across
the terminals and observe, reverse the leads to the rectifier terminals and observe meter reading. If a
short is indicated in both directions, or if an infinite resistance is read in both directions, the rectifier is
probably defective and should be replaced.
D
HIGH VOLTAGE CAPACITOR TEST
DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS
OR WIRING.
16
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TESTPROCEDURES
COMPONENTTEST
PROCEDURE
LETTER
If the capacitor is open, no high voltage will be available to the magnetron. Disconnect input leads and
check for short or open between the terminals using an ohmmeter.
Checking with a high ohm scale, if the high voltage capacitor is normal, the meter will indicate continuity
for a short time and should indicate approximately 10 MΩ once the capacitor is charged. If the above
is not the case, check the capacitor with an ohmmeter to see if it is shorted between either of the
terminals and case. If it is shorted, replace the capacitor.
E
F
PRIMARY INTERLOCK SWITCH AND THIRD DOOR SWITCH TEST
Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal
of the switch. The meter should indicated an open circuit with the door open and a closed circuit with
the door closed. If improper operation is indicated, replace the switch.
SECONDARY INTERLOCK SYSTEM TEST
DOOR SENSING SWITCH
Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal
of the switch. The meter should indicated an open circuit with the door open and a closed circuit with
the door closed. If improper operation is indicated, replace the door sensing switch.
SECONDARY INTERLOCK RELAY
Disconnect two (2) wire leads from the tab terminal of the secondary interlock relay (RY2). Check the
state of the relay contacts using a ohmmeter. The relay contacts should be open. If the relay contacts
are closed, replace the circuit board entirely or the relay itself.
G
MONITORSWITCH
Disconnect the oven from power supply.
Beforeperformingthistest, makesurethattheprimaryinterlockswitchandthesecondaryinterlockrelay
are operating properly, according to the above Test Procedures. Disconnect the wire lead from the
monitor switch (NC) terminal. Check the monitor switch operation by using the ohmmeter as follows.
When the door is open, the meter should indicate a closed circuit. When the monitor switch actuator
is pushed by a screw driver through the lower latch hole on the front plate of the oven cavity with the
door opened (in this condition the plunger of the monitor switch is pushed in), the meter should indicate
an open circuit. If improper operation is indicated, the switch may be defective. After testing the monitor
switch, re-connect the wire lead to the monitor
switch (NC) terminal and check for continuity of
N.C.
monitor circuit.
MONITOR SWITCH
COM.
SCREW DRIVER
PRIMARY
INTERLOCK
SWITCH
OHMMETER
H
BLOWN MONITOR FUSE
If the monitor fuse is blown when the door is opened, check the primary interlock switch, door sensing
switch relay (RY1) and monitor switch according to the "TEST PROCEDURE" for those switches before
replacing the blown monitor fuse.
CAUTION: IF THE MONITOR FUSE IS BLOWN BY IMPROPER SWITCH OPERATION, THE
MONITOR FUSE AND SWITCH MUST BE REPLACED WITH "MONITOR FUSE AND
SWITCH ASSEMBLY" PART NUMBER FFS-BA012WRK0, EVEN IF THE MONITOR
SWITCH OPERATES NORMALLY. THE MONITOR FUSE AND SWITCH ASSEMBLY IS
PACKED WITH 20 AMPERE FUSE AND SWITCH.
I
OVEN THERMAL CUT-OUT (on the side of steam duct)
A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the
temperature of the oven thermal cut-out reaches approximately 302οF (150οC). The thermal cut-out
resetautomaticallyatapproximately266οF(130οC). Ifthethermalcut-outhasoperatedunderthenormal
condition, replace the thermal cut-out. An open thermal cut-out indicates overheating of the oven cavity.
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MAGNETRON THERMAL CUT-OUT (on the waveguide)
A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the
temperature of the thermal cut-out reaches approximately 257οF (125οC).
An open thermal cut-out indicates overheating of the magnetron. Check for restricted air flow to the
magnetron through the vent holes of the oven cavity, especially the cooling duct and cooling fan.
CAUTION: IF THE THERMAL CUT-OUT INDICATES OPEN CIRCUIT AT ROOM TEMPERATURE,
REPLACE THE THERMAL CUT-OUT.
CONVECTION CUT-OUT (on side of the heater duct)
A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the
temperature of thermal cut-out reaches 302οF (150οC). The thermal cut-out resets automatically at
approximately 266οF (130οC). If the thermal cut-out has operated under the normal condition,
replace the thermal cut-out. An open thermal cut-out indicates overheating of heater unit, check for
restricted air flow to the heater unit through the vent hole of the oven cavity, especially the heater
duct and convection fan.
J
HEATING ELEMENT TEST
Make sure the heating element is fully cooled and test as follows;
a. Disconnect wire leads and measure the resistance with an ohmmeter. On the R x 1 scale, the
resistance between the heating element terminals should be approximately 10.2Ω.
b. Disconnect wire leads and measure the insulation resistance with 500V - 100MΩ insulation
resistance meter. The insulation resistance between heating element terminal and cavity should be
more than 0.5MΩ.
K
THERMISTORTEST
Disconnect connector-E from the control unit. Measure the resistance of the thermistor with an
ohmmeter. Connect the ohmmeter leads to Pin No’s E-3 and E-4.
Room Temperature
68οF(20οC) - 86οF(30οC)
Resistance
Approx. 350kΩ - 155KΩ
If the meter does not indicate above resistance, replace the thermistor
L
DAMPER MOTOR TEST
When the power cord is plugged into the wall receptacle and 117 volts A.C. is supplied to the damper
motor, the motor operates until the damper is opened and the damper switch closes. Then the damper
motor stops operation.
If the damper motor does not operate, check for A.C. voltage with a voltmeter at the motor.
1. Disconnect the power cord from the wall receptacle.
2. Disconnect the wire leads of motor and connect the meter leads to the wire leads of main wire
harness.
3. Re-connect the power cord into the wall receptacle.
If 117 volts A.C. is indicated at the wire leads, replace the motor and if 117 volts A.C. is not indicated,
check the wire harness and control unit.
M
DAMPER SWITCH TEST
Disconnectthewireleadsfromtheswitchterminalsandconnectohmmeterleadstothecommon(COM.)
and normally open (N.O.) terminals of the switch.
1. When switch actuator is pushed by the damper motor cam, the meter should be indicated a closed
circuit.
2. When power cord is plugged into the wall receptacle, the damper motor operates and damper cam
will start to rotate. When the switch actuator is released, the meter should be indicated an open
circuit. If improper operation is indicated, replace the damper switch.
N
CHECKING TEMPERATURE IN THE CONVECTION MODE
It is difficult to measure the exact temperature in the convection oven. An accurate thermocouple type
18
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TESTPROCEDURES
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temperature tester must be used. A low priced bi-metal type thermometer is not reliable or accurate.
The temperature should be checked with outer case cabinet installed, approx. 5 minutes after preheat
temperature is reached (audible signal sounds four times). The temperature experienced may be
approx. 30οF more or less than indicated on the display, however, in most cases the food cooking results
will be satisfactory.
Difference in power supply voltage will also affect the oven temperature. The Household power supply
voltage may sometimes become lower than the rated voltage (117 V) and cause under-cooking. If the
power supply voltage is 10% lower than the rated voltage, longer cooking time is required by 10% to
20%.
O
NOISE FILTER TEST
NOISE FILTER
N
H
FUSE 20A
NOISE SUPPRESSION COIL
Disconnect the oven from power supply.
Disconnect the lead wires from the terminal the noise filter. Using
an ohmmeter, check between the terminals as described in the
following table.
LINE CROSS CAPACITOR
0.22µF / AC 250V
MEASURING POINT
Between N and H
INDICATION OF OHMMETER
Open circuit.
Between terminal N and GRAY
Between terminal H and RED
Short circuit.
LINE BYPASS
CAPACITOR
LINE BYPASS
CAPACITOR
Short circuit.
0.0033µF / AC 125V 0.0033µF / AC 125V
If incorrect reading are obtained, replace the noise filter.
GRY
RED
P
TOUCH CONTROL PANEL ASSEMBLY TEST
The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore,
unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeter
and ohmmeter.
In this service manual, the touch control panel assembly is divided into two units, Control Unit and Key
Unit and troubleshooting by unit replacement is described according to the symptoms indicated.
1. Key Unit.
Note : Check key unit ribbon connection before replacement.
The following symptoms indicate a defective key unit. Replace the key unit.
a) When touching the pads, a certain pad produces no signal at all.
b) When touching a number pad, two figures or more are displayed.
c) When touching the pads, sometimes a pad produces no signal.
2. Control Unit
The following symptoms indicate a defective control unit. Replace the control unit.
2-1 In connection with pads.
a) When touching the pads, a certain group of pads do not produce a signal.
b) When touching the pads, no pads produce a signal.
2-2 In connection with indicators
a) At a certain digit, all or some segments do not light up.
b) At a certain digit, brightness is low.
c) Only one indicator does not light.
d) The corresponding segments of all digits do not light up; or they continue to light up.
e) Wrong figure appears.
f) A certain group of indicators do not light up.
g) All digits in the figure flicker.
2-3 Other possible troubles caused by defective control unit.
a) Buzzer does not sound or continues to sound.
b) Clock does not operate properly.
c) Cooking is not possible.
d) Proper temperature measurement is not obtained.
Note:Whendefectivecomponents, theControlUnitorKeyUnitarereplaced, thedefectivepartorparts
must be properly packed for return in the shipping carton, with its cushion material, in which the
new replacement part was shipped to you.
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Q
KEY UNIT TEST
If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable is
making good contact, verify that the door sensing switch (stop switch) operates properly; that is the
contacts are closed when the door is closed and open when the door is open. If the door sensing switch
(stop switch) is good, disconnect the flat ribbon cable that connects the key unit to the control unit and
make sure the door sensing switch is closed (either close the door or short the door sensing switch
connecter). Use the key unit matrix indicated on the control panel schematic and place a jumper wire
between the pins that correspond to the STOP/CLEAR pad making momentary contact.
If the control unit responds by clearing with a beep the key unit is faulty and must be replaced. If the
control unit does not respond, it is a faulty and must be replaced. If a specific pad does not respond,
the above method may be used (after clearing the control unit) to determine if the control unit or key
pad is at fault.
G 5
G 6
G 7
G 8
G 9
G10
G11
G12
HIGH MIX
ROAST
ADD-A-
MINUTE
SENSOR CONVEC CONVEC CONVEC
DEFROST
BROIL
G 4
G 3
G 2
G 1
COOK
BROIL
ROAST
BAKE
1
2
3
4
300°F
5
325°F
POPCORN
REHEAT
PREHEAT CONVEC
SLOW LOW MIX
100°F
150°F
275°F
6
350°F
7
375°F
8
400°F
9
425°F
0
450°F
COOK
BAKE
START
TOUCH ON
TIMER
POWER
LEVEL
STOP
CLEAR
CLOCK
HELP
KEY UNIT
R
RELAY TEST
Remove the outer case and check voltage between Pin Nos. 7 and 9 of the 9- pin connector (A) on the
control unit an A.C. voltmeter. The meter should indicate 120 volts, if not check the oven circuitry.
Shut-off, Cook and Heater Relay Test
These relays are operated by D.C. voltage
CheckvoltageattherelaycoilwithaD.C. voltmeterduringthemicrowavecookingoperationorconvection
cookingoperation.
DC. voltage indicated ............. Defective relay.
DC. voltage not indicated ........ Check diode which is connected to the relay coil. If diode is good, control
unit is defective.
RELAY SYMBOL
OPERATIONAL VOLTAGE
Approx. 19.0V D.C.
Approx. 18.0V D.C.
Approx. 18.0V D.C.
Approx. 19.0V D.C.
Approx. 19.0V D.C.
CONNECTED COMPONENTS
RY1
Oven lamp / Turntable motor
RY2(COOK)
RY3(HEATER)
RY4
Power transformer
Heating element
Damper motor
RY5
Convection motor
RY6
Approx. 19.0V D.C.
Cooling fan motor
S
COMPU DEFROST TEST
(1) Place one cup of water in the center of the turntable tray in the oven cavity.
(2) Close the door, touch the "DEFROST" pad twice and touch the Number pad "5". And then touch the
"START" pad.
(3) After 2 sec. Now the oven is in DEFROST cooking condition.
(4) The oven will operate as follows.
WEIGHT
1ST STAGE
LEVEL TIME
2ND STAGE
LEVEL TIME LEVEL
0% 52sec. 50% 32sec.
3RD STAGE
4TH STAGE
TIME
LEVEL
TIME
0.5lbs
70%
47sec.
30% 40sec.
(5) If improper operation is indicated, the control unit is probably defective and should be checked.
20
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T
PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD
(PWB) IS OPEN.
To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary
on the PWB, this foil pattern acts as a fuse. If the foil pattern is open, follow the troubleshooting
guide given below for repair.
Problem: POWER ON, indicator does not light up.
STEPS
OCCURRENCE
The rated voltage is not applied to POWER
terminal of CPU connector (CN-A).
The rated voltage is applied to primary side
of power transformer.
CAUSE OR CORRECTION
Check supply voltage and oven power cord.
1
2
3
4
Power transformer or secondary circuit defective.
Check and repair.
Only pattern at "a" is broken.
*Insert jumper wire J1 and solder.
Pattern at "a" and "b" are broken.
*Insert the coil RCILF2003YAZZ between "c" and "d".
NOTE: *At the time of making these repairs, make a
visual inspection of the varistor. Check for
burneddamageandexaminethetransformer
with an ohmmeter for the presence of layer
short-circuit (check the primary coil resist-
ancewhichisapproximately175Ω 10%). If
any abnormal condition is detected, replace
the defective parts.
d
b
a
c
U
AH SENSOR TEST
Checking the initial sensor cooking condition
(1) The oven should be plugged in at least two minutes before sensor cooking.
(2) Room temperature should not exceed 95οF (35οC).
(3) The unit should not be installed in any area where heat and steam are generated. The unit should
not be installed, for example, next to a conventional surface unit. Refer to the "INSTALLATION
Instructions".
(4) Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity. To
permit adequate ventilation, be sure to install so as not to block these vents. There should be some
space for air circulation.
(5)Besuretheexteriorofthecookingcontainerandtheinterioroftheovenaredry. Wipeoffanymoisture
with a dry cloth or paper towel.
(6) The Sensor works with food at normal storage temperature. For example, chicken pieces would be
at refrigerator temperature and canned soup at room temperature.
(7) Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The
sensor will detect the vapour given of by the spray and turn off before food is properly cooked.
(8) After 30 minutes if the sensor has not detected the vapour of the food, ERROR will appear and the
oven will shut off.
Water load cooking test
Make sure the oven has been plugged in at least five minutes before checking sensor cook operation.
The cabinet should be installed and screws tightened.
(1) Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
(2) Place the container on the center of tray in the oven cavity.
(3) Close the door.
(4) Touch SENSOR COOK pad and number pad 1. Now, the oven is in the sensor cooking condition
and "BAKED POTATO" will appear in the display.
(5)TouchStartpad. Theovenwilloperateforthefirst16seconds, withoutgeneratingmicrowaveenergy.
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When the AH sensor is defective (open or short), Error will appear in the display after 16 seconds
cleaning time.
If ERROR appears check sensor wire connections and/or AH sensor.
NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage of
sensor cooking.
(6)Afterapproximately16seconds, microwaveenergyisproduced, andthedisplayshouldstarttocount
down the remaining cooking time and oven should turn off after water is boiling (bubbling).
If the oven does not turn off, replace the AH sensor or check the control unit, refer to explanation below.
TESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT
To determine if the sensor is defective, the simplest method is to replace it with a new replacement
sensor.
(1) Disconnect oven from power supply and remove outer case.
(2) Discharge the high voltage capacitor.
(3) Remove the AH sensor.
(4) Install the new AH sensor.
(5) Re-install the outer case.
(6) Reconnect the oven to the power supply and check the sensor cook operation proceed as follows:
6-1. Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
6-2. Place the container on the center of tray in the oven cavity.
6-3. Close the door.
6-4. Touch SENSOR COOK pad and number 1 pad.
6-5. Touch Start pad. The control panel is in automatic Sensor operation.
6-6. The display will start to count down the remaining cooking time, and the oven will turn off
automatically after the water is boiling (bubbling).
If new sensor dose not operate properly, the problem is with the control unit.
CHECKING CONTROL UNIT
(1) Disconnect oven from power supply and remove outer case.
(2) Discharge the high voltage capacitor.
(3) Disconnect the wire leads from the cook relay.
(4) Disconnect the sensor connector that is mounted to lower portion of control panel.
(5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.
(6) Reconnect the oven to the power supply and check the sensor cook operation proceed as follows:
6-1. Touch SENSOR COOK pad and number 1 pad.
6-2. Touch Start pad. The control panel is in the sensor cooking operation.
6-3. After approximately 20 seconds, push plunger of select switch for more than 3 seconds. This
condition
is same as judgement by AH sensor.
6-4. After approximately 3 seconds, the display shows " X X . X X " which is the remaining cooking
time, and the display count down.
If the above is not the case, the control unit is probably defective.
If the above is proper, the AH sensor is probably defective.
Plunger
R1,R2 : 22Ω 1% 1/2W
NC
R3 : 4.3kΩ 5% 1/4W
NO
R4 : 1MΩ 5% 1/4W
To connector (F)
on Control Unit.
COM
1
NO
NC
F-1
F-2
COM
2
3
R1
R2
F-3
R3
R4
CONNECTOR
Sensor Dummy Resistor Circuit
22
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TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL
The touch control section consists of the following units
5) Buzzer Circuit
as shown in the touch control panel circuit.
The buzzer is responds to signals from the LSI to emit
noticingsounds(keytouchsoundandcompletionsound).
(1) Key Unit
(2) Control Unit
6) Temperature Measurement Circuit : (OVEN
THERMISTOR)
The principal functions of these units and the signals
communicated among them are explained below.
The temperature in the oven cavity is sensed by the
thermistor. The variation of resistance according to
sensed temperature is detected by the temperature
measurement circuit and the result applied to LSI. The
LSI uses this information to control the relay and display
units.
Key Unit
The key unit is composed of a matrix, signals P10 - P17
generated in the LSI are sent to the key unit.
When a key pad is touched, a signal is completed through
the key unit and passed back to the LSI through R24 - R27
to perform the function that was requested.
7) Absolute Humidity Sensor Circuit
This circuit detects the humidity of a food which is being
cooked, to control its automatic cooking.
Control Unit
Control unit consists of LSI, power source circuit, synchro-
nizing signal circuit, ACL circuit, buzzer circuit, temperature
measurement circuit, absolute humidity sensor circuit and
indicator circuit.
8) Door Sensing Switch
A switch to inform the LSI if the door is open or closed.
9) Relay Circuit
To drive the magnetron, heating element, fan motor,
convection motor, damper motor, turntable motor and
light the oven lamp.
1) LSI
This LSI controls the temperature measurement signal,
AH sensor signal, key strobe signal, relay driving signal
for oven function and indicator signal.
10) Indicator Circuit
Indicator element is a Fluorescent Display.
Basically, a Fluorescent Display is triode having a
cathode, a grid and an anode. Usually, the cathode of a
Fluorescent Display is directly heated and the filament
serves as cathode.
The Fluorescent Display has 8-digits, 16-segments are
used for displaying figures.
2) Power Source Circuit
This circuit generates the voltages necessary for the
control unit from the AC line voltage.
3) Synchronizing Signal Circuit
The power source synchronizing signal is available in
order to compose a basic standard time in the clock
circuit. It incorporates a very small error because it
works on commercial frequency.
4) ACL Circuit
A circuit to generate a signals which resetting the LSI to
the initial state when power is applied.
DESCRIPTION OF LSI
LSI(IXA103DR):
The I/O signals of the LSI(IXA103DR) are detailed in the following table.
Pin No.
1
2
Signal
VCC
VEE
I/O
IN
IN
Description
Connected to GND.
Anode (segment) of Fluorescent Display light-up voltage: -30V.
Vp voltage of power source circuit input.
3
4
AVSS
VREF
IN
IN
Power source voltage: -5V.
VC voltage of power source circuit input.
Reference voltage input terminal.
A reference voltage applied to the A/D converter in the LSI. Connected to GND.(0V)
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Pin No.
Signal
I/O
Description
5
AN7
IN
Used for initial balancing of the bridge circuit (absolute humidity sensor). This input
is an analog input terminal from the AH sensor circuit, and connected to the A/D
converter built into the LSI.
6
AN6
IN
AH sensor input.
This input is an analog input terminal from the AH sensor circuit, and connected to
the A/D converter built into the LSI.
7-9
10
AN5-AN3
AN2
IN
IN
Heating constant compensation terminal.
Input signal which communicates the door open/close information to LSI.
Door closed; "H" level signal(0V).
Door opened; "L" level signal(-5V).
11
AN1
IN
Input signal which communicates the damper open/close information to LSI.
Damper opened; "H" level signal(0V:GND).
Damper closed; "L" level signal(-5V).
12
13
AN0
P55
IN
Temperature measurement input: OVEN THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the thermistor,
this input is converted into temperature by the A/D converter built into the LSI.
Digit selection signal.
The relationship between digit signal and digit are as follows;
OUT
H
Digit signal
Digit
ß(60Hz)
L
P03 .......................... 1st.
P02 ......................... 2nd.
P01 .......................... 3rd.
P00 .......................... 4th.
P37 .......................... 5th.
P36 ......................... 6th.
P35 ......................... 7th.
GND
VP
P03
P02
P01
P00
P37
P36
P55 ......................... 8th.
Normally, one pulse is output in every ß
period, and input to the grid of the Fluores-
cent Display.
P35
P55
14
P54
OUT
Oven lamp and turntable motor driving signal. (Square Waveform : 60Hz)
16.7 msec.
To turn on and off the shut-off relay(RY1).
H
The square waveform voltage is delivered to
the relay(RY1) driving circuit.
L
During cooking
15
16
17
P53
P52
P51
OUT
OUT
OUT
Convection motor driving signal.
H.
L
GND
During
cooking
OFF
To turn on and off shut-off relay(RY5). "L"
level during CONVECTION; "H" level other-
wise.
(Convection)
ON
Cooling fan motor driving signal.
To turn on and off shut-off relay(RY6). "L"
level during both microwave and convection
cooking; "H" level otherwise.
Magnetron high-voltage circuit driving
signal.
H. GND
L
OFF
During
cooking
ON
VARI MODE
ONTIME
32 sec.
30 sec.
26 sec.
24 sec.
22 sec.
18 sec.
16 sec.
12 sec.
8 sec.
OFF TIME
0 sec.
P-HI (100% power)
To turn on and off the cook relay(RY2). In
P-HI operation, the signals holds "L" level
during microwave cooking and "H" level
while not cooking. In other cooking modes
(P-90, P-80, P-70, P-60, P-50, P-40, P-
30, P-20, P-10, P-0) the signal turns to "H"
level and "L" level in repetition according
to the power level.
P-90 (approx. 90% power)
P-80 (approx. 80% power)
P-70 (approx. 70% power)
P-60 (approx. 60% power)
P-50 (approx. 50% power)
P-40 (approx. 40% power)
P-30 (approx. 30% power)
P-20 (approx. 20% power)
P-10 (approx. 10% power)
P-0 (0% power)
2 sec.
6 sec.
8 sec.
10 sec.
14 sec.
16 sec.
20 sec.
24 sec.
26 sec.
32 sec.
6 sec.
0 sec.
24
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Pin No.
Signal
I/O
Description
Damper motor relay driving signal.
18
P50
OUT
H : GND
OFF
To turn on and off shut-off relay(RY4).
ON
L
19
P47
OUT
Heating element driving signal.
To turn on and off shut-off relay(RY3). "L" level
during convection cooking; "H" level otherwise.
During convection cooking, the signal becomes "H"
level when the temperature of the oven cavity
exceeds the predetermined temperature.
H.
L
GND
During
OFF
cooking
(Convection)
ON
20-21
22
P46-P45
P44
OUT
OUT
Terminal not used.
Timing signal output terminal for temperature measurement(OVEN THERMIS-
TOR).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing.(Convection cooking)
23
P43
OUT
Signal to sound buzzer.
H
ß(60Hz)
L
A: key touch sound.
GND
P03
VP
B: Completion sound.
P02
P01
P00
P37
P36
C: When the temperature of the oven
cavity reaches the preset temperature
in the preheating mode, or when the
preheating hold time (30 minutes) is
elapsed.
P35
P55
24
25
P42
OUT
IN
Timing signal output terminal for temperature measurement(OVEN).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing.(Convection cooking)
Signal to synchronize LSI with commercial power source frequency.
INT1
H : GND
L (-5V)
This is the basic timing for all real time
processing of LSI.
16.7 msec.
26
27
P40
RST
IN
IN
Connected to GND.
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily
set to "L" level the moment power is applied, at this time the LSI is reset. Thereafter
set at "H" level.
28/29
30
XCIN/XCOUT
OUT
IN
Terminal not used.
XIN
Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to XOUT terminal.
31
32
33
XOUT
VSS
P27
OUT
IN
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
Power source voltage: -5V.
VC voltage of power source circuit input.
Signal coming from touch key.
When any one of G-1 line keys on key matrix is touched, a corresponding signal from
P10 - P17 will be input into P27. When no key is touched, the signal is held at "L" level.
IN
34
35
36
P26
P25
P24
IN
IN
IN
Signal similar to P27.
When any one of G-2 line key on key matrix is touched, a corresponding signal will
be input into P26.
Signal similar to P27.
When any one of G-3 line key on key matrix is touched, a corresponding signal will
be input into P25.
Signal similar to P27.
When any one of G-4 line key on key matrix is touched, a corresponding signal will
be input into P24.
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Pin No.
Signal
I/O
Description
37
P23
OUT
Segment data signals.
The relation between signals and indicators are as follows:
Signal Segment Signal Segment Signal Segment Signal Segment
P23 ............. P1 P17............. P5 P13 .............P9 P07 ........... P13
P22 ............. P2 P16............. P6 P12 ...........P10 P06 ........... P14
P21 ............. P3 P15............. P7 P11 ...........P11 P05 ........... P15
P20 ............. P4 P14............. P8 P10 ...........P12 P04 ........... P16
38-40
41
P22-P20
P17
OUT
OUT
Segment data signal.
Signal similar to P23.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-12 line keys on key matrix is touched.
42
43
44
45
46
47
48
P16
P15
P14
P13
P12
P11
P10
OUT
OUT
OUT
OUT
OUT
OUT
OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-11 line keys on key matrix is touched.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-10 line keys on key matrix is touched.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-9 line keys on key matrix is touched.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-8 line keys on key matrix is touched.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-7 line keys on key matrix is touched.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-6 line keys on key matrix is touched.
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-5 line keys on key matrix is touched.
49-53
54-56
57-59
P07-P03
P02-P00
P37-P35
OUT
OUT
OUT
Segment data signal.
Signal similar to P23.
Digit selection signal.
Signal similar to P55.
Digit selection signal.
Signal similar to P55.
60-64
P34-P30
OUT
Used for initial balancing of the bridge circuit (absolute humidity sensor).
26
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ABSOLUTE HUMIDITY SENSOR CIRCUIT
(1) Structure of Absolute Humidity Sensor
The absolute humidity sensor includes two thermistors
as shown in the illustration. One thermistor is housed in
the closed vessel filled with dry air while another in the
open vessel. Each sensor is provided with the protective
cover made of metal mesh to be protected from the
external airflow.
than the detector circuit starts to function and the LSI
observes the initial voltage available at its AN6 terminal.
With this voltage given, the switches SW1 to SW5 in the
LSI are turned on in such a way as to change the
resistance values in parallel with R50-1. Changing the
resistance values results in that there is the same
potential at both F-3 terminal of the absolute humidity
sensor and AN7 terminal of the LSI. The voltage of AN6
terminal will indicate about -2.5V. This initial balancing
is set up about 16 seconds after the unit is put in the
SensorCookingmode. Asthesensorcookingproceeds,
the food is heated to generate moisture by which the
resistance balance of the bridge circuit is deviated to
increasethevoltageavailableatAN6terminaloftheLSI.
Then the LSI observes that voltage at AN6 terminal and
comparesitwithitsinitialvalue,andwhenthecomparison
rate reaches the preset value (fixed for each menu to be
cooked), the LSI causes the unit to stop sensor cooking;
thereafter, the unit goes in the next operation
automatically.
Sensing part
Sensing part
(Closed vessel)
(Open vessel)
Sensing part
(Open vessel)
Thermistor
Thermistor
element
element
Ventilation
openings
Sensing part
Sensor
case
(Closed vessel)
View of sensor case removed
Cross section view
(2) Operational Principle of Absolute Humidity Sensor
Thefigurebelowshowsthebasicstructureofanabsolute
humidity sensor. A bridge circuit is formed by two
thermistors and two resistors (R1 and R2).
The output of the bridge circuit is to be amplified by the
operational amplifier.
When the LSI starts to detect the initial voltage at AN6
terminal 16 seconds after the unit has been put in the
Sensor Cooking mode, if it is not possible to balance, of
the bridge circuit due to disconnection of the absolute
humidity sensor, ERROR will appear on the display and
the cooking is stopped.
Each thermistor is supplied with a current to keep it
heated at about 150οC (302οF), the resultant heat is
dissipated in the air and if the two thermistors are placed
in different humidity conditions they show different
degrees of heat conductivity leading to a potential
differencebetweenthemcausinganoutputvoltagefrom
the bridge circuit, the intensity of which is increased as
the absolute humidity of the air increases. Since the
output is very minute, it is amplified by the operational
amplifier.
1) Absolute humidity sensor circuit
IC2(IZA495DR)
SW1
64
4
P30
620k
SW2
5
6
7
8
63
P31
P32
P33
P34
300k
150k
75k
SW3
SW4
SW5
62
61
60
Absolute humidity vs,
output voltage characterist
Operational
amplifier
C
R1
Output
voltage
C. Thermistor in
closed vesssl
S. Thermistor in
open vessel
+
37.4k
-
5
3
R2
S
AN7
S : Thermistor
open vessel
C : Thermistor
closed vessel
47k
R3
LSI
(IC1)
11
3.57k
F-1
C
F-3
Absolute humidity (g/m2)
+
10k
6
2
AN6
-
47k
S
(3) DetectorCircuitofAbsoluteHumiditySensorCircuit
This detector circuit is used to detect the output voltage
of the absolute humidity circuit to allow the LSI to control
sensor cooking of the unit. When the unit is set in the
sensor cooking mode, 16 seconds clearing cycle occurs
3.32k
1.8k
F-2
360k
10
9
1
12
VA : -15V
VA : -15V
VC : -5V
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SERVICING
1. Precautions for Handling Electronic Components
This unit uses CMOS LSI in the integral part of the
circuits. When handling these parts, the following
precautions should be strictly followed. CMOS LSI have
extremely high impedance at its input and output
terminals. For this reason, it is easily influenced by the
surrounding high voltage power source, static electricity
charge in clothes, etc, and sometimes it is not fully
protected by the built-in protection circuit.
while keeping it connected to the oven.
B. On some models, the power supply cord between the
touch control panel and the oven proper is long enough
that they may be separated from each other. For those
models, therefore, it is possible to check and repair the
controls of the touch control panel while keeping it apart
from the oven proper; in this case you must short both
ends of the door sensing switch (on PWB) of the touch
control panel with a jumper, which brings about an
operational state that is equivalent to the oven door
being closed. As for the sensor-related controls of the
touch control panel, checking them is possible if dummy
resistor(s) with resistance equal to that of the controls
are used.
In order to protect CMOS LSI.
1) When storing and transporting, thoroughly wrap them in
aluminium foil. Also wrap all PW boards containing them
in aluminium foil.
2) When soldering, ground the technician as shown in the
figure and use grounded soldering iron and work table.
(2) Servicing the touch control panel with power supply
from an external power source:
Disconnect the touch control panel completely from the
oven proper,and short both ends of the door sensing
switch (on PWB) of the touch control panel,which brings
about an operational state that is equivalent to the oven
door being closed. Connect an external power source to
the power input terminal of the touch control panel, then
it is possible to check and repair the controls of the touch
control panel it is also possible to check the sensor-
related controls of the touch control panel by using the
dummy resistor(s).
approx. 1M ohm
2. Shapes of Electronic Components
Transistor
B
C
DTA123ES
E
KRA101M
KRA223M
KRC243M
4. Servicing Tools
Transistor
2SB910M
B
C
Tools required to service the touch control panel
assembly.
E
3. Servicing of Touch Control Panel
1) Soldering iron: 30W
We describe the procedures to permit servicing of the
touch control panel of the microwave oven and the
precautions you must take when doing so. To perform
theservicing,powertothetouchcontrolpanelisavailable
either from the power line of the oven itself or from an
external power source.
(It is recommended to use a soldering iron with a
grounding terminal.)
2) Oscilloscope: Single beam, frequency range: DC -
10MHz type or more advanced model.
3) Others: Hand tools
(1) Servicing the touch control panel with power supply
of the oven:
5. Other Precautions
1) Before turning on the power source of the control unit,
remove the aluminum foil applied for preventing static
electricity.
CAUTION:
THE HIGH VOLTAGE TRANSFORMER OF THE
MICROWAVE OVEN IS STILL LIVE DURING
SERVICING PRESENTS A HAZARD.
2) Connect the connector of the key unit to the control unit
being sure that the lead wires are not twisted.
3) After aluminum foil is removed, be careful that abnormal
voltage due to static electricity etc. is not applied to the
input or output terminals.
4) Attach connectors, electrolytic capacitors, etc. to PWB,
making sure that all connections are tight.
5) Besuretousespecifiedcomponentswherehighprecision
is required.
Therefore, when checking the performance of the touch
control panel, put the outer cabinet on the oven to avoid
touching the high voltage transformer, or unplug the
primary terminal (connector) of the high voltage
transformer to turn it off; the end of such connector must
be insulated with an insulating tape. After servicing, be
sure to replace the leads to their original locations.
A. On some models, the power supply cord between the
touch control panel and the oven itself is so short that the
two can't be separated.
For those models, check and repair all the controls
(sensor-relatedonesincluded)ofthetouchcontrolpanel
28
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COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
CAUTION: DISCONNECT OVEN FROM POWER SUPPLY BEFORE REMOVING OUTER CASE.
DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING
AFTER REMOVING OUTER CASE.
WARNING FOR WIRING
3) Sharp edge:
To prevent an electric shock, take the following man-
ners.
Bottom plate, Oven cavity, Weveguide flange,
Chassis support and other metallic plate.
4) Movable parts (to prevent a fault)
1. Before wiring,
1) Disconnect the power supply.
2) Open the door and wedge the door open.
3) Dischargethehighvoltagecapacitorandwaitfor60
seconds.
Fan blade, Fan motor, Switch, Switch lever, Open
button.
3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector certainly until its pin
islocked. Andmakesurethatthewireleadsshouldnot
come off even if the wire leads is pulled.
5. To prevent an error function, connect the wire leads
correctly, referring to the Pictorial Diagram.
2. Don’t let the wire leads touch to the followiong parts;
1) High voltage parts:
Magnetron, High voltage transformer, High voltage
capacitor and High voltage rectifier assembly.
2) Hot parts:
Convection heater, Oven lamp, Magnetron, High
voltage transformer and Oven cavity.
OUTER CASE REMOVAL
To remove the components, procedure as follows.
1. Disconnect oven from power supply.
2. Remove screws from rear and along the side edge of
case.
it from retaining clips on the cavity face plate.
4. Lift entire case from the unit.
CAUTION: DISCONNECTOVENFROMPOWERSUPPLY
BEFORE REMOVING OUTER CASE.
3. Slide the entire case back out about 1 inch (3 cm) to free
POWER TRANSFORMER REMOVAL
1. Disconnect oven from power supply and remove outer
case.
2. Discharge high voltage capacitor.
3. Disconnect filament leads of transformer from the
magnetron and capacitor.
4. Disconnect high voltage lead of capacitor from the
transformer.
5. Disconnect wire leads from the transformer.
6. Remove two (2) screws holding the transformer to the
base cabinet.
3. Make sure the transformer is mounted correctly to the
corners underneath those tabs.
4. Afterre-installingthetransformer,securethetransformer
with two screws to the base cabinet, one is with outer
toothwasherandtheotheriswithoutouter-toothwasher.
5. Re-connect the wire leads (primary and high voltage)
and high voltage lead to the transformer and filament
leads of transformer to the magnetron and capacitor,
referring to the “Pictorial Diagram”.
6. Re-install the outer case and check that the oven is
operating properly.
Re-install
1. Rest the transformer on the base cabinet with its primary
terminals toward rear cabinet.
2. Insert the two edges of the transformer into two metal
tabs of the base cabinet.
NOTE HOT (ORANGE) WIRE MUST BE CONNECTED
TO THE POWER TRANSFORMER TERMINAL
NEAREST TO THE TRANSFORMER MOUNTING
SCREW.
MAGNETRON REMOVAL
1. Disconnect oven from power supply and remove outer
case.
2. Dischargethehighvoltagecapacitor.Disconnectfilament
lead of transformer from magnetron. Disconnect high
voltage wire lead from magnetron.
3. Carefully remove four (4) mounting screws hold the
magnetron to waveguide, when removing the screws
holding the magnetron to prevent it from falling.
4. Remove the magnetron from the unit with care so the
magnetron tube should not hit by any metal object
around the tube.
CAUTION: WHEN REPLACING THE MAGNETRON, BE
SURE THE R.F. GASKET IS IN PLACE AND
THEMAGNETRONMOUNTINGSCREWSARE
TIGHTENEDSECURELY.
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HIGH VOLTAGE RECTIFIER ASSEMBLY REMOVAL
1. Disconnect oven from power supply and remove outer
case.
2. Discharge the high voltage capacitor.
3. Remove one (1) screw holding the rectifier assembly to
the capacitor holder.
and magnetron.
CAUTION: WHENREPLACINGTHESILICONRECTIFIER
ASSEMBLY, THE GROUND SIDE TERMINAL
MUST BE SECURED FIRMLY WITH A
GROUNDINGSCREW.
4. Disconnect the rectifier assembly from the capacitor
HIGH VOLTAGE CAPACITOR REMOVAL
1. Disconnect oven from power supply and remove outer
case.
2. Discharge the high voltage capacitor.
3. Disconnect the high voltage wire leads and rectifier
assembly from high voltage capacitor and magnetron.
4. Disconnectfilamentleadoftransformerfromhighvoltage
capacitor.
5. Disconnect high voltage wire lead of capacitor from
transformer.
6. Remove one (1) screw and washer holding the rectifier
from the capacitor holder.
7. Remove one (1) screw holding the capacitor holder to
the rear cabinet.
8. Remove the capacitor from the holder.
POSITIVE LOCK® CONNECTOR (NO-CASE TYPE) REMOVAL
Terminal
Positive lock®
connector
1
Push the lever of positive lock® connector. Pull down on the
positive lock® connector.
Push
Lever
CAUTION: WHEN YOU CONNECTING THE POSITIVE
LOCK® CONNECTORS TO THE TERMINALS,
INSTALL THE POSITIVE LOCK® SO THAT
THE LEVER FACES YOU.
2
Pull down
Figure C-1. Positive lock®connector
CONVECTION MOTOR REMOVAL
1. Disconnect oven from power supply and remove outer case.
2. Discharge the high voltage capacitor.
3. Disconnect wire leads from the convection motor.
Remove the convection fan belt.
4. Remove two (2) screws holding the convection motor
mounting angle to the heater duct and base cabinet.
5. Take out the convection motor assembly from the unit.
The convection motor assembly is now free.
6. Remove two (2) screws and nuts holding the motor to
mounting angle.
7. Remove pulley (M) from the motor shaft. Convection
motor is now free.
TURNTABLE MOTOR REMOVAL
1. Disconnect the oven from power supply.
Remove the turntable tray, and the turntable support out
of the oven cavity.
2. Turn the oven upside down and remove one (1) screw
holding the turntable motor cover to the base plate and
take off the turntable motor cover.
3. Disconnect wire lead from the turntable motor.
4. Remove the two (2) screws holding the turntable motor
and coupling mounting plate to the oven cavity bottom.
5. Turntable motor, Coupling mounting plate and Thermal
protection plate bottom will be free.
DAMPER ASSEMBLY REMOVAL
1. Disconnect oven from power supply and remove outer
case.
angle to thermal protection plate (right).
5. Damper assembly is free.
2. Discharge the high voltage capacitor.
3. Disconnect wire leads from damper motor and damper
switch.
6. Remove one (1) screw holding damper motor to damper
motor angle and one (1) screw holding damper switch to
damper motor angle.
4. Removetwo(2)ovensidescrewsholdingdampermotor
7. Damper motor and switch are free.
30
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HEATER UNIT ASSEMBLY REMOVAL
(HEATING ELEMENT/CONVECTION FAN/CONVECTION MOTOR/THERMISTOR)
THERMISTOR REMOVAL
HEATING ELEMENT REMOVAL
1. Disconnect oven from power supply and remove outer
case cabinet.
1. Remove two (2) screws holding heating element to
heater duct.
2. Loosen two (2) screws holding holders to heater duct
andtakeheatingelementoutofheatingelementholders.
3. Heating element is free.
2. Discharge the high voltage capacitor.
Disconnect wire leads from H.V. capacitor and remove
four (4) screws holding rear cabinet to bottom plate and
three (3) screws holding to heater unit assembly and two
(2) screws holding steam duct to top of oven cavity.
Disconnectwireleadsfrompowersupplycordterminals.
3. Disconnect wire leads from thermistor. Remove two (2)
screws from thremistor.
NOTE: After installed the heating element completely,
bent top of the heating element holder to inside
using by long nose pliers as shown following
illustration.
4. Disconnect wire leads from convection motor, thermal
cut-out and heater element.
5. Remove nine (9) screws holding heater duct to the oven
cavity.
Long nose plier
Heating
element
6. Remove two (2) screws holding heater duct to base
cabinet.Releasetwo(2)snapbandsholdingwireharness
to the thermal cover (convection).
7. The heater unit is now free.
Heating element
holder
OVEN LAMP AND LAMP SOCKET REMOVAL
1. Disconnect oven from power supply and remove outer
case.
Oven lamp
socket
2. Discharge high voltage capacitor.
3. Bend the tab of the air guide holding the lamp socket.
4. Lift up the oven lamp socket.
Terminal
Wire lead
5. Pull the wire leads from the oven lamp socket by
pushing the terminal hole of the oven lamp socket with
the small flat type screw driver.
Terminal hole
Flat type small
screw driver
6. Now, the oven lamp socket is free.
Figure C-2. Oven lamp socket
FAN MOTOR REMOVAL
1. Disconnect oven from power supply and remove outer
case.
2. Discharge high voltage capacitor.
3. Disconnect the wire leads from the fan motor.
4. Remove one (1) screw holding the fan motor grounding
wire to the air guide (Right).
5. Remove three (3) screws holding the chassis support to
the rear cabinet, waveguide and control panel back
plate.
6. Remove the chassis support from the oven.
7. Remove one (1) screw holding the magnetron air guide
to the waveguide.
8. Remove the magnetron air guide from the waveguide.
9. Disconnect wire leads from the fan motor.
10. Release the main harness from the hole of the fan duct.
11. Release the thermistor harness from the hole of the fan
duct.
12. Release one (1) tab holding the fan duct to the rear
cabinet.
14.Remove the fan duct assembly from the oven.
15.Removethefanbladefromthefanmotorshaftaccording
the following procedure.
1) Hold the edge of the rotor of the fan motor by using a pair
of grove joint pliers.
CAUTION:
*
Make sure that any pieces do not enter the gap
between the rotor and the stator of the fan motor
because the rotor is easily shaven by pliers and
metal pieces may be produced.
*
*
Do not touch the pliers to the coil of the fan motor
because the coil may be cut or injured.
Do not disfigure the bracket by touching with the
pliers.
2) Remove the fan blade from the shaft of the fan motor by
pulling and rotating the fan blade with your hand.
3) Now, the fan blade will be free.
CAUTION:
*
Donotusethisremovedfanbladeagainbecausethe
hole (for shaft) of it may become bigger than a
standard one.
13. Release one (1) tab holding the fan duct to the air guide
(Right).
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16.Remove the two (2) screws and nuts holding the fan
motor to the fan duct.
17.Now, the fan motor is free.
because the bracket may be disfigured.
Make sure that the fan blade rotates smooth after
installation.
*
*
Make sure that the axis of the shaft is not slanted.
INSTALLATION
1. Install the fan motor to the fan duct with the two (2)
screws and nuts.
2. Install the fan blade to the fan motor shaft according the
following procedure.
1) Hold the center of the bracket which supports the shaft
of the fan motor on the flat table.
2) Apply the screw lock tight into the hole (for shaft) of the
fan blade.
3. Reset the fan duct assembly to its place.
4. Install the tabs of fan duct to the rear cabinet and air
guide.
5. Install the magnetron air guide with the one (1) screw.
6. Reinstall the main harness and thermistor harness to
each hole of the fan duct.
7. Reinstall the chassis support to the control panel back
plate, waveguide and rear cabinet with the three (3)
screws.
8. Re-connect the wire leads to the fan motor, referring to
the pictorial diagram.
3) Install the fan blade to the shaft of fan motor by pushing
thefanbladewithasmall,lightweight,ballpeenhammer
or rubber mallet.
9. Re-install the fan motor grounding wire to the air guide
(Right) with one (1) screw.
CAUTION:
*
Do not hit the fan blade strongly when installed
Shaft
Coil
Groove joint pliers
Shaft
Axis
Table
Center of
bracket
Stator
These are the positions
that should be pinched
with pliers.
Gap
Stator
Bracket
Rotor
Rotor
Side View
Rear View
POWER SUPPLY CORD REPLACEMENT
Removal
1. Disconnect oven from power supply and remove outer
case.
2. Discharge high voltage capacitor.
3. Disconnect the white and black wires of the power
supply cord from the noise filter.
4. Remove the one (1) screw holding the earth wire of the
power supply cord to the base cabinet.
5. Remove the power supply cord from the rear cabinet.
Re-install
Noise filter
White wire
RED
GRY
Power
supply cord
N
H
Black wire
Rear Cabinet
Base Cabinet
1. Insert the power supply cord into the rear cabinet.
2. Connect the white and black wires of the power supply
cord into the terminal of noise filter, referring to the
Pictorial Diagram.
Green wire
3. Re-install the earth wire of the power supply cord to the
base cabinet with the one (1) screw.
Figure C-3. Power supply cord replacement
CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL
To remove the control panel, procedure as follows:
1. Disconnect oven from power supply and remove outer
case.
2. Discharge high voltage capacitor.
3. Disconnect connector CN-A, CN-E and CN-F from the
control unit.
cavity flange.
8. Lift up and pull the control panel assembly forward.
Replacement of individual component is as follows;
CONTROL UNIT AND KEY UNIT
1. Disconnect the wire connector from the control unit.
2. Remove the four (4) screws holding the panel frame to
the back plate.
3. Separate the panel frame and back plate.
4. Remove the three (3) screws holding the control unit to
the panel frame.
5. Lift up the control unit and disconnect the key connector
from the control unit.
4. Disconnect the wire leads from the relays RY1, RY2 and
RY3.
5. Remove one (1) screw holding the control panel back
plate to the chassis support.
6. Remove two (2) screws holding the bottom edge of the
back plate to the cabinet base.
7. Removeone(1)screwholdingthebackplatetotheoven
32
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panel frame, adjust the lower edge and right
edge of the key unit to the correct position of the
control panel frame.
6. Now,thecontrolunitandframeassemblyareseparated.
NOTE; 1. Before attaching a new key unit, remove
remaining adhesive on the control panel frame
3. Stick the key unit firmly to the control panel
frame by rubbing with soft cloth not to scratch.
surfaces completely with alcohol and so on.
2. When a attaching the key unit to the control
THIRD DOOR SWITCH, DOOR SENSING SWITCH, PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH
of switches place.
8. Switch is now free.
REMOVAL
1. Disconnect oven from power supply and remove outer
case.
2. Discharge high voltage capacitor.
3. Remove the control panel assembly, refer to "Control
Panel Removal".
At this time switch lever will be free, do not lose it.
Re-install
1. Re-install switch lever and each interlock switch in its
place. The primary interlock switch is in the lower
position and the door sensing switch and thir door switch
are in the upper position and the monitor switch is in the
middle position.
4. Disconnect wire leads from each of the switches and
fuse holder.
2. Re-connectwireleadstoeachswitchesandfuseholder.
Refer to pictorial diagram.
3. Secure latch hook (with two (2) mounting screws) to
oven flange.
5. Remove two (2) screws holding latch hook to oven
flange.
6. Remove latch hook assembly from oven flange.
7. Push outward on the one (1) stopper tabs holding each
4. Make sure that the monitor switch is operating properly
and check continuity of the monitor circuit. Refer to chapter "Test Procedure" and Adjustment procedure.
latched position.
THIRD DOOR SWITCH, DOOR SENSING SWITCH, PRIMARY
INTERLOCK SWITCH AND MONITOR SWITCH
ADJUSTMENT
2. The door sensing switch and primary interlock switch
interrupt the circuit before the door can be opened.
3. Monitor switch contacts close when door is opened.
4. The third door switch contacts open when the door is
opened.
If the door sensing switch, third door switch, primary
interlock switch and monitor switch do not operate properly
due to a misadjustment, the following adjustment should be
made.
1. Loosenthetwo(2)screwsholdinglatchhooktotheoven
cavity front flange.
2. With door closed, adjust latch hook by moving it back
and forth, and up and down. In and out play of the door
allowed by the latch hook should be less than 0.5mm.
Theverticalpositionofthelatchhookshouldbeadjusted
so that the door sensing switch and primary interlock
switch are activated with the door closed. The horizontal
position of the latch hook should be adjusted so that the
plungers of the monitor switch and the third door switch
are pressed with the door closed.
LATCH HOOK
THIRD DOOR SWITCH
DOOR SENSING
SWITCH
MONITOR SWITCH
LATCH
HEADS
PRIMARY
INTERLOCK SWITCH
SWITCH LEVER
OPEN LEVER
3. Secure the screws with washers firmly.
4. Check the all switches operation. If each switch has not
activated with the door closed, loosen the screw and
adjust it.
DOOR OPEN
BUTTON
After adjustment, check the following.
5. Re-install outer case and check for microwave leakage
around door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
1. In and out play of door remains less than 0.5mm at the
DOOR REPLACEMENT AND ADJUSTMENT
Figure C-4. Latch Switch Adjustments
4. Remove door assembly from upper oven hinge on the
oven.
REMOVAL
1. Disconnect oven from power supply and remove the
outer case.
5. Door assembly is now free.
Remove turntable tray and turntable support from oven
cavity.
2. Remove three (3) screws holding lower oven hinge.
3. Remove the lower oven hinge from oven cavity bottom
flange.
Note: When the individual parts are replaced, refer to
"Door Disassembly".
6. On re-installing door, insert the upper oven hinge into
the door hinge pin. Then while holding door in place.
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DMOC205SS
VMOC205SS
7. Make sure the door is parallel with oven face lines (left
and upper side lines) and door latch heads pass through
latch holes correctly.
8. Insert the lower oven hinge into oven cavity bottom
flange and then engaged the door hinge pin. Then
securethelowerovenhingefirmlywithtree(3)mounting
screws.
cycle. This function does not require that door be
airtight, moisture (condensation)-tight or light-tight.
Therefore,occasionalappearanceofmoisture,light
or sensing of gentle warm air movement around
oven door is not abnormal and do not of themselves
indicate a leakage of microwave energy from oven
cavity. If such were the case, your oven could not
be equipped with a vent, the very purpose of which
is to exhaust the vapor-laden air from the oven
cavity.
Note: After any service to the door;
(A) Make sure that door sensing switch and secondary
interlock switch are operating properly. (Refer to
chapter "Test Procedures".).
(B) An approved microwave survey meter should be
used to assure compliance with proper microwave
radiation emission limitation standards.
UPPER OVEN HINGE
DOORADJUSTMENT
The door can be adjusted by keeping screws of each hinge
loose.
RE-INSTALL
DOOR ASSEMBLY
After adjustment, make sure of the following :
1. Door latch heads smoothly catch latch hook through
latch holes and that latch head goes through center of
latch hole.
2. Deviation of door alignment from horizontal line of cavity
face plate is to be less than 1.0mm.
LATCH
HEADS
3. Door is positioned with its face pressed toward cavity
face plate.
LOWER OVEN HINGE
4. Re-install outer case and check for microwave leakage
around door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
Note: The door on a microwave oven is designed to act as
an electronic seal preventing the leakage of
microwave energy from oven cavity during cook
RE-INSTALL
Figure C-5. Door Replacement and adjustment
DOOR DISASSEMBLY
2
LIFT UP
Remove door assembly, refer to "Door Replacement".
Replacement of door components are as follows:
1. Place door assembly on a soft cloth with latches facing
up.
Note: Astheengagingpartofchokecoveranddoorpanel
areprovidedatseveralplaces,donotforceanyparticular
part.
PUTTY KNIFE
1
BENT
CHOKE COVER
Bent
INSIDE
FRONT
Door
Choke
cover
Panel
2. Insert an putty knife (thickness of about 0.5mm) into the
gap between the choke cover and corner portion of door
panel as shown Figure C-6 to free engaging parts.
3. Lift up choke cover.
Upper
Lower
4. Now choke cover is free from door panel.
Figure C-6. Door Disassembly
34
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DMOC205SS
VMOC205SS
MICROWAVE MEASUREMENT PROCEDURE
After adjustment of the door, interlock and monitor switches
Leakage test:
are completed individual or collectively, interlock switch
test and microwave leakage test must be performed with
survey instrument and test results must be confirmed to
meet the requirement of the performance standard for
microwave ovens as undermentioned.
Leakage Test with Enclosure Installed.
1. Grasp the probe of the survey instrument and hold it
perpendicular to the gap between the door and the body
of the oven.
2. Move the probe slowly, not faster than 2.5cm/sec. along
the gap, watching for the maximum indication on the
meter.
3. Check for leakage at the door screen, sheet metal
seams and other accessible positions where the
continuity of the metal has been breached (eg., around
the switches, indicator, and vents).
Requirement
Every microwave oven shall function in such a manner that
when the oven is fully assembled and operating with it’s
service controls and user controls adjusted to yield the
maximum output, the leakage radiation, at all points at least
5 cm. from the external surface of the oven, does not
exceed:
4. Measure carefully at the point of highest leakage and
make sure that the highest leakage is no greater than
4mW/cm2, and that the primary interlock switch does
turn the oven OFF before any door movement.
1. 1.0mW/cm2 with the test load, 275 15ml of water at an
initial temperature of 20 5οC.
2. 5.0mW/cm2 when the outer enclosure is removed with a
test load of 275 15ml water at an initial temperature of
20 5οC.
Leakage Test without Enclosure.
1. Remove the enclosure (cabinet).
3. 5.0mW/cm2 without a test load.
2. Grasp the probe of the survey meter and hold it
perpendicular to all mechanical and eleeectronic parts
of the oven that is accessible to the user of the oven
including, but not limited to, the waveguide, cavity,
cavity seams, magnetron and magnetron to waveguide
connection.
3. Move the probe slowly (not faster than 2.5cm/sec.),
watching for the maximum indication on the meter.
4. Measure carefully at the point of highest leakage and
make sure that the highest reading is under the required
limit as mentioned above.
Preparation For Testing:
Before beginning the actual measurement of leakage,
proceed as follows:
1. Makesurethattheactualinstrumentisoperatingnormally
as specified in its instruction booklet.
Note: Surveyinstrumentsthatcomplywiththerequirement
for instrumentation as prescribed by CSA and NHW
performance standard for microwave ovens must
be used for testing.
Recommended instruments are:
NARDA 8100
CAUTION !
NARDA 8200
Special attention should be given to avoid electrical
shock because HIGH VOLTAGE is generated during
this test.
2. Place the oven tray in the oven cavity.
3. Place the load of 275 15 ml of tap water initially at
20 5οC in the center of the oven cavity.
No Load Test
The water container shall be a low form of 600 ml beaker
with an inside diameter of approx. 8.5 cm and made of
an electrically nonconductive material such as glass or
plastic.
The placing of this standard load in the oven is important
not only to protect the oven, but also to insure that any
leakage is measured accurately.
1. Operatetheovenwithoutaloadandmesuretheleakage
by the same method as the above test procedure “A.
Test Enclosure Installed”.
2. Make sure that the highest leakage should not exceed
5mW/cm2.
Note: Do not perform this test for extended periods.
4. Close the door and set the time cooking for several
minutes. And start the oven. If the water load is depleted
replace it.
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DMOC205SS
VMOC205SS
6
4
5
2
1
3
A
B
C
D
E
F
A
B
C
D
E
F
G
G
H
H
6
4
5
2
1
3
36
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DMOC205SS
VMOC205SS
6
4
5
2
1
3
3 . 3 k
R 8 1
P 1
P 2
P 3
P 4
P 5
P 6
4
5
6
7
8
9
D 7 7
D 7 6
D 7 5
A
B
C
D
E
F
A
B
C
D
E
F
3 . 3 k
R 8 0
1 0 P 7
1 1 P 8
3 . 3 k
R 7 9
1 2 P 9
P 1 0
1 3
1 5 P 1 1
1 6 P 1 2
1 7 P 1 3
1 8 P 1 4
1 9 P 1 5
2 0 P 1 6
2 2 1 G
2 3 2 G
2 4 3 G
2 5 4 G
2 6 5 G
2 7 6 G
2 8 7 G
3 . 3 k
R 7 8 D 7 4
3 . 3 k
R 7 7 D 7 3
3 . 3 k
R 7 6 D 7 2
3 . 3 k
R 7 5 D 7 1
1 0 0 k
1 0 0 k
1 0 0 k
R 9 3
R 9 2
R 9 1
3 . 3 k
R 7 4 D 7 0
R 1 0 0 3 3 0 1 w
R 7 3 3 . 3 k
R 7 2 3 . 3 k
R 7 1 3 . 3 k
R 7 0 3 . 3 k
I C 1 I X A 1 0 3 D R
C 7
R 7 4 . 7 k
C 8
R 6 4 3 . 3 k F
( J 7 )
( J 5 ) 6 . 8 k
R 8 4 . 7 k
H Z 4 A 2
R 6 3 2 2 0 F
( J 3 )
( J 6 )
C 6 1 0 µ / 3 5 v
Z D 4
C 5 0 . 1 µ / 5 0 v
( J 4 ) 1 5 k
( J 2 )
C 9 0 . 0 1 µ / 5 0 v
H Z 5 C 2
Z D 3
/ 2 5 v
2 2 µ
R 5 0 1 5 k
R 3 0 1 5 k
C 4 1 0 µ / 3 5 v
C 3 0 . 1 µ / 5 0 v
R 4 0 3 . 3 k
C 2 1 0 . 1 µ / 5 0 v
C 1 1
D 3 1
H Z 1 6 - 1
Z D 2
S P 4 0
4 7 0 1 / 2 w
R 2
C 2 0 1 0 µ / 3 5 v
C 2 1 0 0 0 µ / 3 5 v
C 1 0 . 1 µ / 5 0 v
C 2 2 0 . 1 µ / 5 0 v
D 2 3
D 2 0
D 2 1
D 2 2
D 2 4
D 2 5
D 2 6
G
G
1 0 G 4 7 1 K
V R S 1
( J 1 )
H
H
6
4
5
2
1
3
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DMOC205SS
VMOC205SS
6
4
5
2
1
3
R
A
B
C
D
E
F
A
B
C
D
E
F
1
32
,F
B
E
Q90
1
2
R91
R92
3
C10
R80
R81
R93
R73
(C81)
R86(J8)
R72
R71
R70
D70
D71
D72
D73
D74
D75
D76
(C80)
(R45)
(C45)
C7
3
1
(CN - D)
D77
4
R79
R78
R77
R76
R75
6
ZD3
ZD4
R74
C9
R64
(R47)
(R48)
8
9
(R49)
C5
C6
10
11
12
(J7)
(J5)
(C46)
(C47)
C30
C50
C60
13
(J3)
(J2)
(J4)
14
15
(J6)
16
17
CONV
HEATER
RED
18
COM
BRN
D25
D24
E
B
Q40
C21
19
RY3
RY2
E
C3
B
B
Q25
Q24
D31
D30
E
C4
D23
R3
21
RY1
C2
22
B
C22
C1
Q21
E
23
24
RY5
B
Q20
E
RY4
G
G
C11
R10
R11
RY6
0
H
H
Figure S-3. Printed Wiring Board
6
4
5
2
1
3
38
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DMOC205SS
VMOC205SS
PARTS LIST
•Refer to "IMPORTANT" described at end of parts list.
REF. NO.
PART NO.
DESCRIPTION
Q'TY
ELECTRICALPARTS
1- 1
1- 2
1- 3
1- 4
1- 5
1- 6
1- 7
1- 8
1- 9
1-10
1-10
1-11
1-13
1-14
1-15
1-16
1-17
1-17
1-18
1-19
1-19
1-20
1-21
FACCDA074WRE0 Power supply cord
1
1
1
3
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
FFS-BA012WRK0
Monitor fuse 20A and monitor switch (V-5220D-070) assembly
FPWBFA293WRK0 Noise filter
QSW-MA110WRE0
Primary interlock switch/Thirdoor switch/Door sensing switch
FH-HZA041WRE0 Thermistor
QSW-MA110WRE0 Damper switch
RTHM-A116WRE0 Magnetron thermal cut-out
125οC
RTHM-A085WRE0 Oven & Convection thermal cut-out 150οC
RMOTDA192WRE0 Damper motor
RLMPTA077WRE0 Oven lamp
RLMPTA027WRE0 Oven lamp (Interchangeable)
QSOCLA021WRE0 Oven lamp socket
RMOTEA283WRE0 Convection fan motor
RMOTEA300WRE0 Fan motor
RHET-A136WRE0 Heating element
RTRN-A527WRE0 Power transformer
RC-QZA173WRE0 H.V.capacitor
RC-QZA211WRE0 H.V.capacitor (Interchangeable)
FH-DZA053WRK0 H.V.rectifier assembly
RV-MZA222WRE0 Magnetron
RV-MZA114WRE0 Magnetron (Interchangeable)
RMOTDA222WRE0 Turntable motor
FDTCTA183WRK0 AH sensor assembly
CABINETPARTS
2- 1
2- 2
2- 3
2- 4
2- 5
2- 6
2- 7
2- 8
2- 9
2-10
2-11
2-12
GCABUA721WRP0 Outer case cabinet
TMAPCA733WRR0 Schematic diagram
FDAI-A180WRY0 Base cabinet (Not Replaceable)
GLEGPA019WRE0 Foot
GCABDA088WRW0 Rear cabinet (Not Replaceable)
LHLDKA009WRF0 Cord holder
LBNDKA036WRP0 Capacitor holder
FHNG-A320WRMZ Oven hinge (Lower)
PHOK-A112WRF0 Latch hook
1
1
1
4
1
1
1
1
1
1
1
1
MLEVPA131WRF0 Switch lever
GCOVHA347WRP0 Turntable motor cover
PCOVPA171WRP0 CSA barrier
CONTROL PANEL PARTS
3- 1
3- 2
3- 2
3- 2-1
3- 2-1
3- 2-2
3- 2-2
3- 2-3
3- 3
3- 4
3- 5
3- 6
3- 7
3- 8
3- 9
DPWBFC189WRUZ Control unit
1
1
1
1
1
1
1
1
1
1
1
3
3
2
2
FPNLCB458MRK0 Control panel frame with key unit (DMOC205SS)
FPNLCB459MRK0 Control panel frame with key unit (VMOC205SS)
FUNTKA393WRE0 Key unit (DMOC205SS)
FUNTKA394WRE0 Key unit (VMOC205SS)
JBTN-B164WRF0 Open button (DMOC205SS)
JBTN-B165WRF0 Open button (VMOC205SS)
MSPRCA045WRE0 Open button spring
LANGTA340WRW0 Control panel back plate
FANGTA093WRK0 Open lever
NSFTTA042WRE0 Open shaft
XEPSD30P10XS0 Screw ; control unit mtg.
XCPSD40P12000 Screw ; control panel back plate mtg.
LX-CZB019MRE0 Screw ; control panel mtg.
XOTSD40P12RV0 Screw ; power unit assy
OVEN PARTS
4- 1
4- 2
4- 3
4- 4
4- 5
4- 6
4- 7
4- 8
4- 9
4-10
4-11
4-12
4-13
4-14
4-15
FOVN-A314WRY0 Oven cavity assembly (Not Replaceable)
FROLPA072WRK0 Turntable support
NTNT-A019WRH0 Turntable tray
1
1
1
1
1
1
2
1
FBRGMA002WRE0 Bearing ass’y
PREFHA028WRW0 Thermal protection plate (left)
LANGTA196WRW0 Bearing mounting plate
LBNDK0054WRE0 Heater element holder
LFIX-A013WRW0 Bearing holder plate
NFANMA019WRW0 Convection fan
NPLYBA020WRF0 Pulley (F)
1
1
1
1
2
1
FDUC-A279WRK0 Heater duct assembly
PFPF-A138WRE0 Thermal protection sheet (left)
LANGKA723WRP0 Glass mounting plate
PCUSUA167WRP0 Cushion
PCUSUA424WRP0 Cushion
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DMOC205SS
VMOC205SS
REF. NO.
PART NO.
DESCRIPTION
Q'TY
4-16
4-17
4-18
4-19
4-20
4-21
4-22
4-23
4-24
4-25
4-26
4-27
4-28
4-29
4-30
4-31
4-32
4-33
4-34
4-35
4-36
4-37
4-38
4-39
4-40
4-41
4-42
4-43
FDUC-A323WRW0 Steam duct assembly
MCAMPA030WRF0 Damper cam
NSFTTA114WRE0 Damper shaft
FFTA-A034WRK0 Damper door ass’y
PDUC-A269WRW0 Damper duct
PCUSGA398WRP0 Cushion
NCPL-A021WRF0 Turntable coupling
PCOVPA301WRE0 Waveguide cover
PCUSUA197WRP0 Cushion
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
PGLSPA455WRE0 Light glass
PFPF-A139WRE0 Thermal protection sheet (Right)
PREFHA053WRW0 Thermal protection plate (Right)
PSKR-A153WRW0 Air guide (Bottom)
PSKR-A323WRW0 Air guide (Right)
LANGQA407WRW0 Convection motor mounting plate
NPLYBA021WRF0 Pulley (M)
NFANJA020WRE0 Fan blade
PDUC-A270WRF0 Cooling fan duct
LANGFA089WRW0 Chassis support
MHNG-A520WRMZ Oven hinge (Upper)
NBLTKA005WRE0 Convection fan belt
LANGQA474WRP0 Noise unit angle
PCUSUA196WRP0 Cushion
PCUSUA425WRP0 Damper duct cushion
PCUSGA353WRP0 Cushion
PSKR-A171WRW0 Magnetron air guide
PFPF-A064WRE0 Thermal protection sheet
PCOVPA304WRP0 Thermo cover
DOOR PARTS
5
5
FCOV-B255MRK0 Door panel assembly complete (DMOC205SS)
FCOV-B254MRK0 Door panel assembly complete (VMOC205SS)
DDORFA820WRY0 Door panel
GCOVHA155WRF0 Choke cover
LANGKA851WRT0 Latch angle
1
1
1
1
1
1
1
1
1
5- 1
5- 2
5- 3
5- 4
5- 5
5- 6
5- 7
5- 8
5- 9
5-10
LSTPPA169WRF0 Latch head
MSPRTA081WRE0 Latch head spring
LANGKA918WRW0 Thermal plate U
LANGKA919WRW0 Thermal plate R
XCPSD40P08000 Screw; 4mm x 8mm
XEPSD30P08000 Screw; 3mm x 8mm
PCUSGA537WRPZ Cushion
6
12
1
MISCELLANEOUS
6- 1
6- 2
6- 3
6- 4
6- 5
6 -6
6- 7
6- 8
6- 9
6- 9
6-10
6-11
6-12
6-13
6-14
6-15
6-16
FAMI-A088WRM0 Low rack (Broiling trivet)
FAMI-A087WRM0 High rack (Baking rack)
FW-VZB342WRE0 Thermistor harness
FW-VZB604WRE0 Main wire harness
QW-QZA198WRE0 High voltage wire B
QW-VZA108WRE0 Grounding wire (Cooling fan motor)
TCAUAA196WRR0 Monitor caution label
TCAUAB034MRR0 NHW caution label
TINSEB363MRR0 Operation manual (DMOC205SS)
TINSEB364MRR0 Operation manual (VMOC205SS)
LHLDWA013WRE0 Purse lock LL
TCAUHB008MRR0 User caution
TCAUSB012MRR0 BIK label
TCAUAB048MRR0 GND caution label
TINSEB322MRR0 S/S cleaning instructions
TCADCB016MRR0 Cook book
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
TCAUAB033MRR0 UL screw label
SCREWS NUTS AND WASHERS
7- 1
7- 2
7- 3
7- 4
7- 5
7- 6
7- 7
7- 8
7- 9
7-10
XOTWW40P10000 Screw; 4mm x 10mm
XOTSE40P12000 Screw; 4mm x 12mm
XCTWW40P08000 Screw; 4mm x 8mm
XHTSD40P08RV0 Screw; 4mm x 8mm
LX-CZ0052WRE0 Special screw
XWVSD60-07000 Washer; 6mm x 0.7 mm
LX-WZA004WRE0 Washer
LX-CZA020WRE0 Special screw
XBPSD30P14K00 Screw; 3mm x 14mm
XBPSD40P25000 Screw; 4mm x 25mm
14
4
2
4
2
1
1
6
1
2
40
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DMOC205SS
VMOC205SS
REF. NO.
PART NO.
DESCRIPTION
Q'TY
7-11
7-12
7-13
7-14
7-15
7-16
7-17
7-18
7-19
7-20
7-21
7-22
7-23
7-24
7-25
7-26
7-27
7-28
7-29
XBTWW40P06000 Screw; 4mm x 6mm
XCTSD40P08000 Screw; 4mm x 8mm
LX-NZ0029YBE0 Special nut
XBPSD40P06KS0 Screw; 4mm x 6mm
LX-WZA022WRE0 Washer
7
7
1
2
1
6
3
1
3
1
4
6
2
21
2
2
1
LX-BZ0531FCZZ Screw; 4mm x 8mm
XCPSD30P06000 Screw; 3mm x 6mm
LX-CZA038WRE0 Special screw
XFPSD40P08K00 Screw; 4mm x 8mm
XBPSD40P06000 Screw; 4mm x 6mm
XCBWW30P06000 Screw; 3mm x 6mm
XFPSD40P08000 Screw; 4mm x 8mm
XFPSD60P14JS0 Screw; 6mm x 14mm
XOTSD40P12000 Screw; 4mm x 12mm
XFPSD30P08000 Screw; 3mm x 8mm
XNESD40-32000 Nut; 4mm x 3.2mm
XNEUW40-32000 Nut; 4mm x 3.2mm
XWSUW40-10000 Washer; 4mm x 1 mm
LX-CZA070WRE0 Screw; UL
1
2
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DMOC205SS
VMOC205SS
6
4
5
2
1
3
OVEN AND CABINET PARTS
A
B
C
D
E
F
A
B
C
D
E
F
G
G
H
H
6
4
5
2
1
3
42
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DMOC205SS
VMOC205SS
6
4
5
2
1
3
CONTROL PANEL PARTS
3-7
6-11
A
B
C
D
E
F
A
B
C
D
E
F
3-3
3-1
3-6
3-4
3-2
3-9
7-24
3-5
3-7
3-2-1
7-24
3-2-3
3-2-2
5-9
5-2
3-8
5-1
5-10
5-6
5-8
5
DOOR PARTS
5-8
5-3
5-8
VMOC205SS
5-4
5-8
5-7
5-5
DMOC205SS
5-11
MISCELLANEOUS
G
G
6-1
6-4
6-3
6-2
6-10
Actual wire harness may be different than illustration.
6-6
H
H
6-5
6
4
5
2
1
3
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DMOC205SS
VMOC205SS
6
4
5
2
1
3
PACKING AND ACCESSORIES
TRAY HOLDER
A
B
C
D
E
F
A
B
C
D
E
F
TOP PAD ASSEMBLY
DOOR PROTECTION SHEET
4-3 TURNTABLE TRAY
PLASTIC BAG
6-9 OPERATION
MANUAL
6-14 S/S CLEANING INSTRUCTIONS
6-15 COOK BOOK
MICROWAVE OVEN
4-2 TURNTABLE SUPPORT
BOTTOM PAD ASSEMBLY
TRAY PACKING FOAM
PACKING CASE
Not replaceable items.
G
G
H
H
6
4
5
2
1
3
44
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DMOC205SS
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