R-210A
SERVICE MANUAL
SX737R210APT/
MICROWAVE OVEN
COOKING CONTROL
MED
DEFROST
MED LOW
RICE
MED HIGH
LOW
HIGH
MODEL
DEFROST kg
TIMER
R-210A
RICE
1.0
0.5
4
2
DOOR OPEN
In interests of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.
TABLE OF CONTENTS
Page
CAUTION, MICROWAVE RADIATION .............................................................................................................. 1
WARNING ............................................................................................................................................................1
PRODUCT SPECIFICATIONS........................................................................................................................... 2
GENERAL INFORMATION ................................................................................................................................. 2
APPEARANCE VIEW......................................................................................................................................... 3
OPERATION SEQUENCE ................................................................................................................................. 4
FUNCTION OF IMPORTANT COMPONENTS .................................................................................................. 5
SERVICING ........................................................................................................................................................ 6
TEST PROCEDURE .......................................................................................................................................... 8
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ............................................................. 13
MICROWAVE MEASUREMENT ...................................................................................................................... 19
WIRING DIAGRAM .......................................................................................................................................... 20
PICTORIAL DIAGRAM..................................................................................................................................... 21
PARTS LIST...................................................................................................................................................... 22
SHARP CORPORATION
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R-210A
SERVICE MANUAL
MICROWAVE OVEN
R-210A
PRODUCT SPECIFICATIONS
APPEARANCE VIEW
GENERAL IMPORTANT INFORMATION
ThisManualhasbeenpreparedtoprovideSharpCorp.Service
engineers with Operation and Service Information.
It is recommended that service engineers carefully study the
entire text of this manual, so they will be qualified to render
satisfactory customer service.
OPERATING SEQUENCE
FUNCTION OF IMPORTANT
COMPONENTS
CAUTION
MICROWAVE RADIATION
DO NOT BECOME EXPOSED TO RADIATION FROM
THE MICROWAVE GENERATOR OR OTHER PARTS
CONDUCTING MICROWAVE ENERGY.
SERVICING AND
TROUBLESHOOTING CHART
Service engineers should not be exposed to the microwave
energy which may radiate from the magnetron or other
microwave generating devices if it is improperly used or
connected. All input and output microwave connections,
waveguides, flanges and gaskets must be secured. Never
operate the device without a microwave energy absorbing
load attached. Never look into an open waveguide or
antenna while the device is energized.
TEST PROCEDURE
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
WARNING
MICROWAVE MEASUREMENT
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.
(D) The door is not deformed or warped.
(E) There is not any other visible damage with the oven.
WIRING DIAGRAM
PARTS LIST
Servicing and repair work must be carried out only by trained
service engineers.
All the parts marked "*" on parts list are used at voltages more
than 250V.
Removal of the outer wrap gives access to potential above
250V.
All the parts marked "∆" on parts list may cause undue
microwave exposure, by themselves, or when they are dam-
aged, loosened or removed.
SHARP CORPORATION
OSAKA, JAPAN
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R-210A
PRODUCT DESCRIPTION
SPECIFICATION
ITEM
DESCRIPTION
Power Requirements
110 Volts
60 Hertz
Single phase, 2 wire
1.1 KW
Power Consumption
Power Output
700 watts nominal of RF microwave energy (IEC-705)
600 watts nominal of RF microwave energy (2 litre water load )
Operating frequency 2450 MHz
Case Dimensions
Width 450 mm
Height 295 mm including foot
Depth 355 mm
Cooking Cavity Dimensions
Width 288 mm
Height 195 mm
Depth 319 mm
Turntable diameter
Control Complement
272mm
30 min. Single Speed Timer.
Microwave Power for Variable Cooking
Repetition Rate;
HIGH ............................. Full power throughout the cooking time
MED HIGH (MEDIUM HIGH) ......... approx. 70% of FULL Power
MEDIUM ........................................ approx. 50% of FULL Power
MED LOW/ DEFROST................... approx. 30% of FULL Power
(MEDIUM LOW/ DEFROST)
LOW............................................... approx. 10% of FULL Power
Set Weight (Approx.)
Approx. 13 kg
GENERAL INFORMATION
WARNING
THIS APPLIANCE MUST BE EARTHED.
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R-210A
APPEARANCE VIEW
10
3
2
1
OVEN
13
COOKING CONTROL
MED
9
8
DEFROST
RICE
MED HIGH
MED LOW
LOW
HIGH
DEFROST kg
RICE
TIMER
1.0
0.5
4
2
11
DOOR OPEN
14
4
4 5
6
7
15
12
1. Ventilation openings
2. Oven lamp
3. Door hinges
4. Door safety latches
5. See through door
6. Door seals sealing surfaces
7. Coupling
8. Door open button
9. Control panel
11.Power supply cord
12.Rating label
13.Turntable
14.Roller stay
15.Earth wire
10.Waveguide cover
CONTROLPANEL
1
VARIABLE COOKING CONTROL
There are five power levels. The approxi-
mate percentage of microwave power for
each setting is:
COOKING CONTROL
MED
HIGH
100%
DEFROST
RICE
MED HIGH
MED HIGH (MEDIUM HIGH) 70%
MED LOW
MED (MEDIUM)
MED LOW/ DEFROST
(MEDIUM LOW/ DEFROST)
LOW
50%
30%
HIGH
LOW
1
10%
2
3
4
MEAT DEFROST GUIDE
RICE COOKING GUIDE
TIMER (0-30 minutes)
Turn to set cooking time or weight of defrost
food.
2
3
DEFROST kg
TIMER
RICE
1.0
4
0.5
2
4
DOOR OPEN
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R-210A
OPERATION SEQUENCE
7-1. When the oven door is opened during or after the
OFF CONDITION
cycle of a cooking program, the 1st latch switch and
2nd latch switch must open their (COM-NO) contacts
first. After that the contacts (COM-NC) of the monitor
switch can be closed.
1. When the timer knob is at " 0 ", the oven is OFF
condition.
2. Closingtheovendooractivatesthe1stlatchswitch,the
2nd latch switch and monitor switch.
IMPORTANT:
When the oven door is closed, the contacts COM-NC of
the monitor switch must be open.
Figure O-1 on page 20
7-2. When the oven door is closed. The contacts (COM-
NC) of the monitor switch must be opened and the
contacts (COM-NO) of the 2nd latch switch and the
1st latch switch must be closed.
7-3. When the oven door is opened and the (COM-NO)
contacts of the 1st latch switch and the contacts
(COM-NO) of the 2nd latch switch remain closed, the
fuse 13A will blow, the monitor switch is closed and a
short circuit is caused.
MICROWAVE COOKING CONDITION
HIGH COOKING
Set the variable cooking control to HIGH and then set the
timer.
MEDIUM HIGH, MEDIUM, MEDIUM LOW, LOW
COOKING
Function sequence
Figure O-2 on page 20
When the microwave oven is preset for variable cooking
power, the rated voltage is supplied to the power trans-
formerintermittentlywithina30-secondtimebasethrough
the vari switch. The following levels of microwave power
are given.
1. Following components are energized.
Power transformer
Magnetron
H.V. capacitor
H.V. rectifier
Timer motor
Fan motor
Oven lamp
H. V. fuse
Turntable motor
2. Rated voltage is supplied to the primary winding of the
power transformer. The voltage is converted to about
3.3 volts A.C. output on the filament winding and high
voltage of approximately 2000 volts A.C. on the sec-
ondary winding.
3. The filament winding voltage (3.3 volts) heats the
magnetronfilamentandthehighvoltage(2000volts)is
sent to the voltagedoubling circuit, where it is doubled
to negative voltage of approximately 4000 volts D.C..
4. The 2450 MHz microwave energy produced in the
magnetron generates a wave length of 12.24 cm. This
energyischannelledthroughthewaveguide(transport
channel) into the oven cavity, where the food is placed
to be cooked.
SETTING
30 sec. ON
HIGH
Approx. 100%
Approx. 70%
Approx. 50%
Approx. 30%
Approx. 10%
23.2 sec. ON
16.5 sec. ON
6.8 sec. OFF
13.5 sec. OFF
MEDIUM HIGH
MEDIUM
9.8 sec. ON 20.2 sec. OFF
MEDIUM LOW
LOW
5.0 sec. ON
25 sec. OFF
Note: The ON/OFF time ratio does not exactly corre-
spond to the percentage of microwave power,
because approx. 2 seconds are needed for heat-
ing up the magnetron filament.
5. When the cooking time is up, the timer returns to "0",
the bell rings and the contacts of the timer are opened.
Then following components are turned off.
Power transformer
Turntable motor
H. V. fuse
Magnetron
H.V. capacitor
H.V. rectifier
Timer motor
Fan motor
Oven lamp
6. When the oven door is opened during a cooking cycle,
the switches come to the following positions and they
are common to the other cooking conditions too.
Switch
Contact
Condition
During
Oven Door
Open(No cooking)
Opened
Cooking
Closed
1st latch Switch
Monitor Switch
2nd latch switch
COM-NO
COM-NC
COM-NO
Opened
Closed
Closed
Opened
The circuit to the power transformer, turntable motor,
timer motor, fan motor and oven lamp are cut off when
the COM-NO contacts of the 2nd latch switch and 1st
latchswitcharemadeopen. Thetimerstopstoindicate
how much cooking time remains.
7. MONITOR SWITCH CIRCUIT
The monitor switch is mechanically controlled by the
oven door, and monitors the operation of the 1st latch
switch and 2nd latch switch.
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R-210A
FUNCTION OF IMPORTANT COMPONENTS
setting of cook time or failure of control unit. Under normal
operation, the temp. fuse remains closed. However, when
abnormally high temperatures are reached within the
oven cavity, the temp. fuse will open at 120˚C, causing the
oven to shut down. The defective fuse must be replaced
with a new one.
DOOR OPEN MECHANISM
Thedoorcanbeopenedbypushingtheopenbuttononthe
control panel. When the open button is pushed, the switch
lever on the latch hook is moved upward, operating the
latchhead.Thelatchheadismovedupward,andreleased
from the latch hook. Now, the door can be opened.
LATCH HOOK
THERMAL CUT-OUT 95˚C (MAGNETRON )
The thermal cut-out located on the top of the oven cavity
is designed to prevent damage to the magnetron if an over
heated condition develops in the tube due to cooling fan
failure, obstructedairguide, dirtyorblockedairintake, etc.
Under normal operation, the thermal cut-out remains
closed.However,whenabnormallyhightemperaturesare
reached within the magnetron, the thermal cut-out will
open at 95˚C, causing the oven to shut down. When the
magnetron has cooled to 75˚, the thermal cut-out closes
and cook cycle will resume.
LATCH
HEADS
1ST. LATCH
SWITCH
MONITOR
SWITCH
DOOR
2ND. LATCH
SWITCH
SWITCH LEVER
NOISE FILTER
Figure D-1. Door Open Mechanism
The noise filter prevents the radio frequency interference
that might flow back in the power circuit.
1ST. LATCH SWITCH AND 2ND. LATCH SWITCH
1. When the oven door is closed, the contacts (COM-NO)
must be closed.
2. When the oven door is opened, the contacts (COM-
NO) must be opened.
TURNTABLE MOTOR
The turntable motor drives the roller stay to rotate the
turntable.
FAN MOTOR
MONITOR SWITCH
The fan motor drives a blade which draws external cool air.
This cool air is directed through the air vanes surrounding
the magnetron and cools the magnetron. This air is chan-
nelled through the oven cavity to remove steam and
vapours given off from the heating foods. It is then ex-
haustedthroughtheexhaustingairventsattheovencavity.
1. When the oven door is closed, the contacts (COM-NC)
must be opened.
2. When the oven door is opened, the contacts (COM-
NC) must be closed.
3. If the oven door is opened and the contacts (COM-NO)
of the 1st latch switch and 2nd latch switch fail to open,
the fuse blows simultaneously with closing the con-
tacts (COM-NC) of the monitor switch.
TIMER MOTOR (WITH VARI-SWITCH)
Timer switch
CAUTION: BEFORE REPLACING A FUSE TEST THE
1STLATCHSWITCH,2NDLATCHSWITCH
AND MONITOR SWITCH FOR PROPER
OPERATION.(REFERTOCHAPTER"TEST
PROCEDURE".)
1. When the timer is at "0" position, the switch of the timer
are opened.
2. When the timer is turned clockwise from "0" position,
the switch of the timer are closed.
Vari-switch
If the variable cooking control is set at HIGH, MEDIUM
HIGH, MEDIUM, MEDIUM LOW or LOW cooking posi-
tion, Rated voltage is supplied to the power transformer
intermittently within a 30 seconds time base. The fol-
lowing chart shows the vari-switch operation in the
various modes.
FUSE
1. The fuse blows when the contacts (COM-NO) of the 1st
latchswitchand2ndlatchswitchremainclosedwiththe
oven door open and when the monitor switch closes.
2. If the wire harness or electrical components are short-
circuited, the fuse blows to prevent an electric shock of
fire hazard.
30 sec. ON
SETTING
HIGH
MEDIUM HIGH
MEDIUM
Approx. 100%
Approx. 70%
Approx. 50%
Approx. 30%
Approx. 10%
23.2 sec. ON
16.5 sec. ON
6.8 sec. OFF
13.5 sec. OFF
HIGH VOLTAGE FUSE
Thehighvoltagefuseblowswhenthehighvoltagerectifier
or the magnetron is shorted.
9.8 sec. ON 20.2 sec. OFF
TEMPERATURE FUSE 120˚C (OVEN)
MEDIUM LOW
LOW
The temp. fuse located on the top of the oven cavity is
designed to prevent damage to the oven if the foods in the
oven catch fire due to over heating produced by improper
5.0 sec. ON
25 sec. OFF
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R-210A
because approx. 2 seconds are needed for heat-
ing up the magnetron filament.
Note: The ON/OFF time ratio does not exactly corre-
spond to the percentage of microwave power,
SERVICING
WARNING TO SERVICE PERSONNEL
Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with following parts
will result in electrocution.
High voltage capacitor, Power transformer, Magnetron, High voltage rectifier assembly, High voltage Fuse, High
voltage harness.
REMEMBER TO CHECK 3D
REMEMBER TO CHECK 4R
1) Reconnect all leads removed from components
during testing.
2) Replace the outer case (cabinet).
3) Reconnect the supply.
1) Disconnect the supply.
2) Door opened, and wedged open.
3) Discharge high voltage capacitor.
4) Run the oven. Check all functions.
WARNING AGAINST THE CHARGE OF THE
HIGH-VOLTAGE CAPACITOR
Microwave ovens should not be run empty. To test for
thepresenceofmicrowaveenergywithinacavity,place
a cup of cold water on the oven turntable, close the door
andsetthepowerleveltoHIGH. Andsetthemicrowave
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 3D checks
and re-examine the connections to the component
being tested.
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 capaci-
tor (that is, of the connecting lead of the high-
voltage rectifier) against the chassis with the use
of an insulated screwdriver.
Sharp recommend that wherever possible fault-finding
is carried out with the supply disconnected. It may in,
some cases, be necessary to connect the supply after
theoutercasehasbeenremoved,inthiseventcarryout
3D checks and then disconnect the leads to the primary
of the power transformer. Ensure that these leads
remain isolated from other components and the oven
chassis. (Use insulation tape if necessary.) When the
testing is completed carry out 3D checks and reconnect
the leads to the primary of the power transformer.
Whenallserviceworkiscompletedandtheovenisfullyassembled, themicrowavepoweroutputshouldbechecked
and microwave leakage test should be carried out.
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 fuse 13A in the 1st. latch switch - 2nd. latch switch
- monitor switch circuit, check the 1st. latch switch, 2nd. latch switch and monitor switch before replacing
the fuse 13A.
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R-210A
TROUBLESHOOTING CHART
TEST PROCEDURE
A B C D E E E F F I
I
I G G H
J K
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
CONDITION
PROBLEM
Fuse 13A blows when
powercordispluggedinto
wall outlet.
OFF
CONDITION
Fuse13Ablowswhenthe
door is opened.
Home fuse blows when
powercordispluggedinto
wall outlet.
Ovendoesnotoperateatall.
Oven goes into cook cy-
cle but shuts down before
end of cooking cycle.
Oven lamp does not light.
(Fan motor rotates)
Fan motor does not oper-
ate, but oven lamp lights.
COOKING
CONDITION
Timermotordoesnotoper-
ate, but oven lamp lights.
Turntablemotordoesnotop-
erate, but oven lamp lights.
Oven seems to be operat-
ing but little or no heat is
producedinovenload.(Mi-
crowave power control is
set at "HIGH" position, and
turntable motor operates.)
Oven does not operate
properly in another position
except "HIGH" position.
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R-210A
TEST PROCEDURES
COMPONENT TEST
PROCEDURE
LETTER
A
MAGNETRON TEST
NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL
WHILE THE OVEN IS IN OPERATION.
CARRY OUT 3D CHECKS.
Isolate the magnetron from the high voltage circuit by removing all leads connected to the filament
terminal.
To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron
filament terminals, the meter should show a reading of less than 1 ohm.
To test for a short circuit filament to anode condition, connect ohmmeter between one of the filament
terminalsandthecaseofthemagnetron(ground). Thistestshouldbeindicatedaninfiniteresistance.
If a low or zero resistance reading is obtained then the magnetron should be replaced.
MICROWAVE OUTPUT POWER (IEC 705)
The following test procedure should be carried out with the microwave oven in a fully assembled
condition (outer case fitted). Microwave output power from the magnetron can be measured by way
of IEC 705, i.e. it can be measured by using water load how much it can be absorbed by the water
load. To measure the microwave output power in the microwave oven, the relation of calorie and watt
is used. When P(W) heating works for t(second), approximately P x t/4.187 calorie is generated. On
the other hand, if the temperature of the water with V(ml) rises∆T (˚C) during this microwave heating
period, the calorie of the water is V x ∆T.
The formula is as follows;
P x t / 4.187 = V x ∆ T
P (W) = 4.187 x V x ∆T / t
Our condition for water load is as follows:
Room temperature..............around 20˚C
Power supply Voltage.........Rated voltage
Water load.........1000 g
P = 70 x ∆ T
Initial temperature...........10±2°C Heating time.........60 sec.
Measuring condition:
1. Container
The water container must be a cylindrical borosilicate glass vessel having a maximum material
thickness of 3 mm and an outside diameter of approximately 190 mm.
2. Temperature of the oven and vessel
The oven and the empty vessel are at ambient temperature prior to the start of the test.
3. Temperature of the water
The initial temperature of the water is (10±2)˚C.
4. Select the initial and final water temperature so that the maximum difference between the final
water temperature and the ambient temperature is 5˚C.
5. Selectstirringdevicesandmeasuringinstrumentsinordertominimizeadditionorremovalofheat.
6. The graduation of the thermometer must be scaled by 0.1˚C at minimum and an accurate
thermometer.
7. The water load must be (1000±5) g.
8. “t”ismeasuredwhilethemicrowavegeneratorisoperatingatfullpower. Magnetronfilamentheat-
up time is not included.
NOTE: The operation time of the microwave oven is “t + 2” sec. 2 sec. is magnetron filament heat-
up time.
Measuring method:
1. Measure the initial temperature of the water before the water is added to the vessel.
(Example: The initial temperature T1 = 11˚C)
2. Add the 1 litre water to the vessel.
3. Place the load on the centre of the shelf.
4. Operate the microwave oven at HIGH for the temperature of the water rises by a value ∆ T of
(10 ± 2)˚C.
5. Stir the water to equalize temperature throughout the vessel.
6. Measure the final water temperature. (Example: The final temperature T2 = 21°C)
7. Calculate the microwave power output P in watts from above formula.
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R-210A
TEST PROCEDURES
COMPONENT TEST
PROCEDURE
LETTER
Initial temperature.................................................................................................. T1 = 11°C
Temperature after (60 + 2) = 62 sec...................................................................... T2 = 21°C
Temperature difference Cold-Warm .................................................................... ∆T1 = 10°C
Measured output power
The equation is “P = 70 x ∆T” ....................................................... P = 70 x 10°C = 700 Watts
JUDGMENT: The measured output power should be at least ± 15 % of the rated output power.
CAUTION: 1°C CORRESPONDS TO 70 WATTS. REPEAT MEASUREMENT IF THE POWER IS
INSUFFICIENT.
1000g
1000g
1000g
T1˚C
T2˚C
Heat up for 62 sec.
MICROWAVE OUTPUT POWER (2 Litre water load)
The following test procedure should be carried out with the microwave oven in a fully assembled
condition (with outer case fitted).
Microwave output power from the magnetron can be measured by way of substitution, i.e. it can be
measured by using a water load how much it can be absorbed by the water load. To measure the
microwave output power in the microwave oven, the relation of calorie and watt is used.
On the other hand, if the temperature of the water with V(ml) rises ∆T (˚C) during this microwave
heating period, the calorie of the water is V x ∆T.
The formula is as follows;
P x t / 4.2 = V x ∆ T
P (W) = 4.2 x V x ∆T / t
Our condition for water load is as follows:
Room temperature .................. 23±2˚C
Power supply Voltage.................. Rated voltage
Water load. ...... 2000 ml Initial temperature ........ 23±1°C Heating time ..... 2 min. 20 sec.
P = 60 x ∆ T
Measuring method:
A) The two water containers must be prepared.
The water container must be one (1) litre beaker made of Pyrex glass and its diameter
approximately 12cm.
B) Put the one (1) litre water into each beaker (Each beaker has one litre water). The initial
temperature of the water should be 23±1˚C.
C) Mark T1 on the one beaker and mark T2 on the other one. And stir the water and measure the
temperature of water the thermometer and note them. The graduation of the thermometer must
be scaled by 0.1˚C at minimum and an accurate mercury thermometer is recommended.
D) Place the two (2) beakers as touching each other in the centre of the oven cavity.
E) Set the timer to 2 minutes and 20 seconds, start the oven at 100% power.
F) The time must be measured with stopwatch or wristwatch.
G) After 2 minutes and 20 seconds, stop the oven by opening the door.
H) Putthetwo(2)beakersoutoftheovencavityandmeasurethetemperatureofthewaterbystirring
the water with thermometer and note them.
Example
Initial temperature...............................................................................T1 = 23˚C T2 = 24˚C
Temperature after 2 min. 22 sec. ...................................................... T1 = 33˚C T2 = 34˚C
Temperature difference Cold-Warm ............................................... ∆T1 = 10˚C ∆T2 = 10˚C
Mean temperature rise ∆T .......................... ∆T = (∆T1 ± ∆T2) / 2 = (10˚C+10˚C) / 2 = 10˚C
Measured output power
The equation is P= 60 x ∆T ......................................................... P= 60 x 10˚C = 600 Watts
NOTE: Themeasuredoutputpowershouldbeatleast±15%oftheratedoutputpower.
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R-210A
TEST PROCEDURES
COMPONENT TEST
PROCEDURE
LETTER
CAUTION: 1˚C CORRESPONDS TO 60 WATTS. REPEAT MEASUREMENT IF THE POWER IS
INSUFFICIENT.
1 l
1 l
1 l
1 l
(T1 C)
(T2 C)
(T1 C)
(T2 C)
Heat up for 2 min. 22 sec.
B
POWER TRANSFORMER TEST
WARNING: High voltages and large currents are present at the secondary winding and
filament winding of the power transformer. It is very dangerous to work near this
part when the oven is on. NEVER make any voltage measurements of the high-
voltage circuits, including the magnetron filament.
CARRY OUT 3D CHECKS.
Disconnect the leads to the primary winding of the power transformer. Disconnect the filament and
secondary winding connections from the rest of the HV circuitry. Using an ohmmeter, set on a low
range, it is possible to check the continuity of all three windings. The following readings should be
obtained:
a.Primary winding................ 0.5 ohms approximately
b.Secondary winding ........... 107 ohms approximately
c.Filament winding .............. less than 1 ohm
If the reading obtained are not stated as above, then the power transformer is probably faulty and
should be replaced.
CARRY OUT 4R CHECKS.
C
HIGH VOLTAGE RECTIFIER TEST
CARRY OUT 3D CHECKS.
Isolate the high voltage rectifier assembly from the HV circuit. The high voltage rectifier can be tested
using an ohmmeter set to its highest range. Connect the ohmmeter across the terminal B+C of the
high voltage rectifier and note the reading obtained. Reverse the meter leads and note this second
reading. The normal resistance is infinite in one direction and more than 100 kΩ in the other direction.
CARRY OUT 4R CHECKS.
C
B
HIGH VOLTAGE RECTIFIER
NOTE: FOR MEASUREMENT OF THE RESISTANCE OF THE RECTIFIER, THE BATTERIES OF
THE MEASURING INSTRUMENT MUST HAVE A VOLTAGE AT LEAST 6 VOLTS, BE-
CAUSE OTHERWISE AN INFINITE RESISTANCE MIGHT BE SHOWN IN BOTH DIREC-
TIONS.
D
HIGH VOLTAGE CAPACITOR TEST
CARRY OUT 3D CHECKS.
A. Isolate the high voltage capacitor from the circuit.
B. Continuity check must be carried out with measuring instrument which is set to the highest
resistance range.
C. A normal capacitor shows continuity for a short time (kick) and then a resistance of about 10MΩ
after it has been charged.
D. A short-circuited capacitor shows continuity all the time.
E. An open capacitor constantly shows a resistance about 10 MΩ because of its internal 10MΩ
resistance.
10
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R-210A
TEST PROCEDURES
COMPONENT TEST
PROCEDURE
LETTER
F. When the internal wire is opened in the high voltage capacitor shows an infinite resistance.
G. The resistance across all the terminals and the chassis must be infinite when the capacitor is
normal.
If incorrect reading are obtained, the high voltage capacitor must be replaced.
CARRY OUT 4R CHECKS.
E
SWITCH TEST
Isolate the switch to be tested and using an ohmmeter check between the terminals as described in
the following table.
CARRY OUT 3D CHECKS.
COM; Common terminal,
Table: Terminal Connection of Switch
NO; Normally open terminal
NC; Normally close terminal
S.C.; Short circuit
Plunger Operation
Released
COM to NO
O.C.
COM to NC
S.C.
Depressed
S.C.
O.C.
O.C.; Open circuit
If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.
CARRY OUT 4R CHECKS.
F
TEMPERATURE FUSE OR THERMAL CUT-OUT TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the thermal cut-out or temperature fuse. Then using an
ohmmeter, make a continuity test across the two terminals as described in the below.
CARRY OUT 4R CHECKS.
Table: Temperature Fuse or Thermal Cut-out Test
Temperature of "ON"
condition (closed circuit). condition (open circuit).
Temperature of "OFF"
Indication of ohmmeter
(When room temperature is approx. 20˚C.)
Parts Name
Temp. fuse 120˚C
This is not resetable type. Above 120˚C
Closed circuit
Closed circuit.
Thermal cut-out 95˚C Below 75˚C
Above 95˚C
If incorrect readings are obtained, replace the temperature fuse or thermal cut-out.
An open circuit thermal cut-out (MG) indicates that the magnetron has overheated, this may be due
to resistricted ventilation, cooling fan failure.
An open circuit temperature fuse (OVEN) indicates that the food in the oven cavity may catch fire, this
may be due to overheating produced by improper setting of the cooking time or failure of the control
panel.
G
MOTOR WINDING TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two
terminals as described in the table below.
Table: Resistance of Motor
Motors
Fan motor
Turntable motor
Resistance
Approximately 60 Ω
Approximately 3.4 kΩ
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS.
H
FUSE 13A
CARRY OUT 3D CHECKS.
Ifthefuse13Aisblownwhenthedoorisopened,checkthe1stlatchswitch,2ndlatchswitch,monitorswitch
and monitor resistor.
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R-210A
TEST PROCEDURES
COMPONENT TEST
PROCEDURE
LETTER
If the fuse 13A is blown by incorrect door switching replace the defective switch(es) and the fuse 13A.
If the fuse 13A is blown, there is a shorts or grounds in electrical parts or wire harness.
Check them and replace the defective parts or repair the wire harness.
CARRY OUT 4R CHECKS.
CAUTION: Only replace fuse with the correct value replacement.
I
TIMER MOTOR (WITH VARI-SWITCH) TEST
5
6
M
CARRY OUT 3D CHECKS before any of the following timer tests.
2
4
1
3
Vari switch
Timer motor with Vari-Switch
TIMER SWITCH- CONTACTS
Disconnect the leads from terminals described at following table. Connect an ohmmeter across
terminals described at following table.
Advance the timer and check that a short circuit reading is obtained on the meter.
Turn the timer back to the zero (0) position and check that an open circuit reading is obtained on the
meter. If these readings are not obtained then replace the timer.
Disconnecting and checking terminals
1 and 2
TIMER - MOTOR
Disconnect the leads from terminals described at following table. Connect an ohmmeter across the
timermotorwinding, terminalsaredescribedatfollowingtable, andcheckthatareadingofresistance
described at following table is indicated.
If this reading is not obtained then the timer is probably defective and should be replaced.
Disconnecting and checking terminals
Resistance of motor winding
5 and 6
approximately 11.3 kΩ
CARRY OUT 4R CHECKS after any of the above tests.
J
NOISE FILTER TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the noise filter. Using an ohmmeter, check between the
terminals as described in the following table.
IN1
IN2
NOISE FILTER
FUSE
13A
MEASURING POINT
Between IN1 and IN2
INDICATION OF OHMMETER
LINE CROSS CAPACITOR 0.22µ/ AC125V
Approx. 180 kΩ
VARISTOR 15G / 270 V
Between terminal N and WHITE Short circuit
Between terminal L and RED Short circuit
DISCHARGE RESISTOR 180 kΩ/ 0.5 W
NOISE SUPPRESSION COIL
LINE BYPASS CAPACITOR LINE BYPASS CAPACITOR
If incorrect readings are obtained, replace the noise filter unit.
CARRY OUT 4R CHECKS.
0.0022µ/AC250V
0.0022µ/AC250V
AC1
AC2
K
HIGH VOLTAGE FUSE TEST
CARRY OUT 3D CHECKS.
If the high voltage fuse is blown, there could be a short in the high voltage rectifier or the magnetron.
Check them and replace the defective parts and the high voltage fuse.
CARRY OUT 4R CHECKS.
CAUTION: ONLY REPLACE HIGH VOLTAGE FUSE WITH THE CORRECT VALUE REPLACEMENT.
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R-210A
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WARNING: Avoid possible exposure to microwave energy. Please follow the instructions
below before operating the oven.
1. Disconnect oven from power supply.
1. Door does not close firmly.
2. Make sure that a definite” click” can be heard when the
microwave oven door is unlatched. (Hold the door in a
closedpositionwithonehand, thenpushthedooropen
buttonwiththeother, thiscausesthelatchleadstorise,
it is then possible to hear a “click’ as the door switches
operate.)
2. Door hinge, support or latch hook is damaged.
3. The door gasket or seal or damaged.
4. The door is bent or warped.
5. There are defective parts in the door interlock system.
6. There are defective parts in the microwave generating
and transmission assembly.
3. Visually check the door and cavity face plate for dam-
age (dents, cracks, signs of arcing etc.).
7. There is visible damage to the oven.
Do not operate the oven:
Carry out any remedial work that is necessary before
operating the oven.
Do not operate the oven if any of the following conditions
exist;
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
3. If the door is not closed.
4. If the outer case (cabinet) is not fitted.
Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any
of the following removal procedures:
WARNING FOR WIRING
and Oven cavity.
3) Sharp edge:
To prevent an electric shock, take the following
manners.
Bottom plate, Oven cavity, Weveguide flange,
Chassis support and other metallic plate.
4) Movable parts (to prevent a fault)
Fanblade,Fanmotor,Switch,Switchlever,Open
button.
1. Before wiring,
1) Disconnect the power supply.
2) Open the door and wedge the door open.
3) Discharge the high voltage capacitor and wait for
60 seconds.
3. Do not catch the wire leads in the outer case cabinet.
4. Insertthepositivelockconnectorcertainlyuntilitspin
is locked. And make sure that the wire leads should
not 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 following parts;
1) High voltage parts:
Magnetron, High voltage transformer, High volt-
age capacitor and High voltage rectifier assem-
bly.
2) Hot parts:
Oven lamp, Magnetron, High voltage transformer
OUTER CASE REMOVAL
To remove the outer case proceed as follows.
1. Disconnect oven from power supply.
2. Open the oven door and wedge it open.
3. Remove the screws from rear and along the side edge
of case.
4. Slide the entire case back about 3cm to free it from
retaining clips on the cavity face plate.
5. Lift the entire case from the oven.
6. Discharge the H.V. capacitor before carrying out any
further work.
7. Do not operate the oven with the outer case removed.
N.B.; Step 1, 2 and 6 form the basis of the 3D checks.
CAUTION: DISCHARGEHIGHVOLTAGECAPACITOR
BEFORE TOUCHING ANY OVEN COMPO-
NENT OR WIRING.
POWER TRANSFORMER REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads (main wire harness and H.V.
fuse) from power transformer.
3. Disconnect the H.V. wire of the H.V. rectifier assembly
from magnetron.
4. Disconnect the wire leads from the noise filter.
5. Remove the one (1) screw holding the capacitor holder
to the oven cavity back plate.
6. Disconnectthefilamentleadofpowertransformerfrom
the magnetron.
7. Disconnecttheleadofthepowertransformerfromhigh
voltage capacitor.
8. Remove the two (2) screws holding the transformer to
bottom plate.
9. Remove the transformer.
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R-210A
HIGH VOLTAGE COMPONENTS REMOVAL
(HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE RECTIFIER ASSEMBLY AND H.V. FUSE)
9. Disconnect the H.V. fuse from high voltage capacitor.
10.Remove the HVC cover from the high voltage capacitor.
11.Now H.V. rectifier assembly, H.V. fuse and H.V. ca-
pacitor should be free.
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. fuse from the power transformer.
3. Disconnect the H.V. wire of the H.V. rectifier assembly
from the magnetron.
4. Disconnect the wire leads from the noise filter.
5. Remove one (1) screw holding capacitor holder to
oven cavity back plate.
6. Disconnect the filament lead of the power transformer
from the H.V. capacitor.
CAUTION: WHENREPLACINGHIGHVOLTAGEREC-
TIFIER ASSEMBLY, ENSURE THAT THE
CATHODE (EARTH) CONNECTION IS SE-
CURELY FIXED TO THE CAPACITOR
HOLDER WITH AN EARTHING SCREW.
CAUTION: DO NOT REPLACE ONLY HIGH VOLTAGE
RECTIFIER. WHEN REPLACING IT, RE-
PLACE HIGH VOLTAGE RECTIFIER AS-
SEMBLY.
7. Removeone(1)screwholdingearthsideterminalofhigh
voltagerectifierassembly, andremovecapacitorholder.
8. Disconnect all the leads and terminals of high voltage
rectifier assembly from high voltage capacitor.
MAGNETRON REPLACEMENT
Removal
1. CARRY OUT 3D CHECKS.
CAUTION: WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
2. Disconnect the wire leads from the magnetron.
3. Carefully remove the two (2) screws holding the
magnetron to the waveguide flange.
4. Lift up magnetron with care so that the magnetron
antenna is not hit by any metal object around antenna.
5. Now, the magnetron is free.
Screws
Magnetron
Re-install
1. Re-install the magnetron to the waveguide flange with
two (2) screws diagonally as shown in Figure C-1.
2. Re-connect the wire leads to the magnetron. Refer to
"PICTORIAL DIAGRAM".
Wavegiude
Flange
Figure C-1. Magnetron Replacement
3. Re-install the outer case and check that the oven is
operating properly.
OVEN LAMP SOCKET REMOVAL
Oven lamp
socket
1. CARRY OUT 3D CHECKS.
2. Pull the wire leads from the oven lamp socket by
pushing the terminal hole of the oven lamp socket
with the flat type small screw driver.
Terminal
Wire lead
3. Tear the cushion from the light mount plate.
4. Bend the tab of the light mount plate holding the oven.
5. Lift up the oven lamp socket.
Terminal hole
Flate type small
screw driver
6. Now, the oven lamp socket is free.
Figure C-2. Oven lamp socket
POSITIVE LOCK® CONNECTOR REMOVAL
Terminal
1. CARRY OUT 3D CHECKS.
2. Pushing the lever of positive lock® connector.
3. Pull out the positive lock® connector.
Positive lock®
connector
1
Push
CAUTION: WHENYOU(SERVICEENGINEERS)CON-
NECT THE POSITIVE LOCK® CONNEC-
TORS TO THE TERMINALS, CONNECT
THE POSITIVE LOCK® SO THAT THE LE-
VER FACE YOU (SERVICE ENGINEERS).
Lever
2
Pull down
Figure C-3 Positive lock® connector
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R-210A
POWER SUPPLY CORD REPLACEMENT
Removal
1. CARRY OUT 3D CHECKS.
Re-install
1. Insert the power supply cord into the oven cavity back plate.
2. Secure the one (1) screw holding the power supply
cord to the oven cavity back plate..
3. Connect the white and black wires of the main wire
harness into the terminal of the power supply cord,
referring to the Pictorial Diagram.
2. Disconnect the wire leads from the power supply cord.
3. Remove the one (1) screw holding the power supply
cord to the oven cavity back plate.
4. Remove the power supply cord from the oven cavity
back plate.
TURNTABLE MOTOR REPLACEMENT
9. Remove the O-ring and washer from the turntable
motor.
10.Now, the turntable motor is free.
Removal
1. Disconnect the oven from the power supply.
2. Remove the turntable and turntable support from the
oven cavity.
Re-install
3. Turn the oven over.
1. Remove the any sharp edges on the turntable motor
cover and the bottom plate with the cutting pliers.
2. Re-install the O-ring.
3. Apply the grease (Shinetsu silicone grease G-420 of
Sinetsu Chemical Co. Ltd. or Toray Silicone grease
SH-14 of Toray Silicone Co., Ltd.) to the O-ring and the
base of the turntable motor shaft as shown in Figure C-
6.
4. Re-install the turntable motor with the O-ring and
washer to the oven cavity with the single (1) screw.
5. Re-connect the wire leads to the turntable motor.
6. Insert the tab of the turntable motor cover into the hole
of the bottom plate as shown in Figure C-4.
7. Re-install the turntable motor cover to the bottom plate
with one (1) screw XHTSD40P08RV0 or
XFPSD40P08K00 as shown in Figure C-4.
4. Cut the four (4) bridges holding the turntable motor
cover to the bottom plate with the cutting pliers as
shown in Figure C-4.
CAUTION: DO NOT DROP THE TURNTABLE MOTOR
COVER INTO THE OVEN AFTER CUTTING
THE BRIDGES. BECAUSE IT WILL DAM-
AGE THE WIRE LEADS OF THE MOTOR
AND IT IS DIFFICULT TO REMOVE IT OUT
OF THE OVEN.
5. Remove the turntable motor cover from the bottom
plate.
6. Disconnect the wire leads from the turntable motor.
7. Remove the single (1) screw holding the turntable
motor to the oven cavity.
8. Remove the turntable motor from the oven cavity.
Screw:
XHTSD40P08RV0
or
XFPSD40P08K00
Washer
Cutting pliers
Washer
Tab
O-ring
Apply grease here
Bridges
Hole
Turntable motor
cover
Base of turntable
motor shaft
O-ring
Bottom plate
Bridges
Turntable motor
Figure C-5. Washer and O-ring Installation and
Grease Applying.
Figure C-4. Turntable Motor Cover
FAN MOTOR REPLACEMENT
a pair of groove joint pliers.
REMOVAL
1. CARRY OUT 3D CHECKS.
CAUTION:
2. Disconnect the wire leads from the fan motor.
3. Remove the one (1) screw holding the chassis support
to the oven cavity front plate.
4. Remove the chassis support .
5. Releasethefilamentleadofthepowertransformerand
the H.V. wire from the fan duct.
• Makesurethatanypiecesdonotenterthegap
between the rotor and the stator of the fan
motor. Because the rotor is easy to be 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.
• Donottransformthebracketbytouchingwith
the pliers.
6. Remove the one (1) screw holding the fan duct to the
waveguide flange.
7. Release the fan motor assembly from the oven cavity.
8. Remove the fan blade from the fan motor shaft accord-
ing to the following procedure.
2) Remove the fan blade assembly from the shaft of
the fan motor by pulling and rotating the fan blade
with your hand.
1) Hold the edge of the rotor of the fan motor by using
3) Now, the fan blade will be free.
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R-210A
CAUTION:
CAUTION:
• Do not re-use the removed fan blade be-
• Do not hit the fan blade strongly when installed
because the bracket may be transformed.
• Make sure that the fan blade rotates smooth
after installed.
• Make sure that the axis of the shaft is not
slanted.
cause
the hole (for shaft) may be lager
than normal.
9. Remove the two (2) screws holding the fan motor to
the fan duct.
10. Now, the fan motor is free.
3. Install the fan motor assembly to the oven cavity by
fittingtheholesofthefanductintothetabsoftheoven
cavity.
4. Re-install the fan duct to the waveguide flange with
the one (1) screw.
5. Insert the end of the chassis support into the slit of the
oven cavity rear cabinet.
6. Re-install the chassis support to the oven cavity front
plate with the one (1) screw.
7. Install the filament lead and the H.V. wire into the hole
of the fan duct .
8. Connect the wire leads to the fan motor, referring to
the pictorial diagram.
INSTALLATION
1. Install the fan motor to the fan duct with the two (2)
screws.
2. Install the fan blade to the fan motor shaft according
the following procedure.
1) Hold the centre of the bracket which supports the
shaft of the fan motor on the flat table.
2) Applythescrewlocktightintothehole(forshaft)ofthe
fan blade.
3) Install the fan blade to the shaft of fan motor by
pushing the fan blade with a small, light weight, ball
peen hammer or rubber mallet.
Rear View
Side View
Shaft
Coil
Groove joint pliers
Table
Center of
bracket
Shaft
Stator
These are the areas
that should be held
with a pliers
Axis
Gap
Bracket
Stator
Rotor
Rotor
CONTROL PANEL ASSEMBLY AND SWITCH LEVER REMOVAL
1. CARRY OUT 3D CHECKS.
5. Lift up the control panel and release it from the oven cavity.
6. Now, the control panel assembly is free.
7. Open the door. Remove the switch lever from the front
plate of the oven cavity.
2. Disconnect the leads from the timer motor.
3. Remove the one (1) screw holding the chassis support
to the front plate of the oven cavity.
4. Remove the chassis support from the oven.
8. Now the switch lever is free.
1ST. LATCH SWITCH, 2 ND. LATCH SWITCH AND MONITOR SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
and monitor switch are in lower position. The 1st. latch
switch is in the upper position.
2. Re-connect wire leads to each switch. Refer to chapter
"Pictorial Diagram".
3. Secure latch hook (with two (2) mounting screws) to
oven flange.
2. Disconnect wire leads from all switches.
3. Remove the control panel assembly and switch lever
from the oven cavity front flange. Referring to chapter
"CONTROL PANEL ASSEMBLY AND SWITCH LE-
VER REMOVAL"
4. Remove two (2) screws holding latch hook to oven
flange.
5. Remove latch hook assembly from oven flange.
6. Push outward on the two (2) retaining tabs holding
switch in place.
7. Switch is now free.
Re-install
1. Re-installeachswitchinitsplace.The2nd.latchswitch
4. Re-install the switch lever and the control panel as-
sembly to the oven cavity front flange.
5. Re-connect wire leads to the timer motor. Refer to
chapter "Pictorial Diagram".
6. Make sure that monitor switch is operating properly
and check continuity of the monitor circuit. Refer to
chapter "Test Procedure", and Adjustment Procedure
below.
1ST. LATCH SWITCH, 2ND. LATCH SWITCH AND MONITOR SWITCH ADJUSTMENT
following adjustment should be made.
1. Loosen the two (2) screws holding the latch hook to the
Ifthe1st.latchswitch,2nd.latchswitchandmonitorswitch
do not operate properly due to a misadjustment, the
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R-210A
flange of the oven front face.
circuit before the door can be opened.
2. With the 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 upper and lower position of the
latch hook should be less than 0.5mm. The horizontal
positionofthelatchhookshouldbeadjustedsothatthe
monitor switch is activated with the door closed. The
verticalpositionofthelatchhookshouldbeadjustedso
that the 1st. latch switch and the 2nd. latch switch are
activated with the door closed.
3. The monitor switch contacts close when the door is
opened.
4. Re-installoutercaseandcheckformicrowaveleakage
around the door with an approved microwave survey
meter. (RefertoMicrowaveMeasurementProcedure.)
LATCH HOOK
3. Secure the screws firmly.
4. Check the operation of all switches. If each switch has
not activated with the door closed, loosen screw and
adjust the latch hook position.
LATCH
HEADS
1ST. LATCH
SWITCH
After adjustment, make sure of the following.
1. In and out play of the door remains less than 0.5mm
wheninthelatchedposition. Firstcheckupperposition
oflatchhook, pushingandpullingupperportionofdoor
toward the oven face. Then check lower portion of the
latch hook, pushing and pulling lower portion of door
toward the oven face. Both results (play in the door)
should be less than 0.5mm.
MONITOR
SWITCH
DOOR
2ND. LATCH
SWITCH
SWITCH LEVER
Figure C-6. Latch Switch Adjustments
2. The 1st. latch switch and 2nd. latch switch interrupt the
DOOR REPLACEMENT
REMOVAL
6. Re-install choke cover to door panel by pushing.
Note: After any service to the door;
(A) Make sure that 1st. latch switch, 2nd. latch switch
andmonitorswitchareoperatingproperly. (Refer
to chapter "Test Procedures".).
(B) An approved microwave survey meter should be
used to assure compliance with proper micro-
wave radiation emission limitation standards.
1. Disconnect oven from power supply.
2. Push the open button and open the door slightly.
3. Insert a putty knife (thickness of about 0.5mm) into the
gap between the choke cover and corner portion of
door panel as shown in Figure C-7 to free engaging
parts.
4. Trytheprinciplesoftheleverandliftupthechokecover
by inserting a putty knife in order shown in figure C-8.
5. Release choke cover from door panel.
6. Now choke cover is free.
7. Release two (2) pins of door panel from two (2) hole of
upper and lower oven hinges by lifting up.
8. Now, door panel is free from oven cavity.
9. Release door panel from ten (10) tabs of door frame
and remove door frame by sliding the door panel
downward.
10
11
12
9
Choke Cover
8
1
7
3
2
6
5
4
Putty Knife
Door Frame
10.Now, door panel with sealer film is free.
11.Tear sealer film from door panel.
12.Now, door panel is free.
Figure C-7. Door Disassembly
13.Slide latch head upward and remove it from door frame
with releasing latch spring from door frame and latch
head.
14.Now, latch head and latch spring are free.
15.Remove door screen from door frame.
16.Now, door screen is free.
After any service, make sure of the following :
1. Door latch heads smoothly catch latch hook through
latch holes and that latch head goes through centre of
latch hole.
2. Deviation of door alignment from horizontal line of
cavity face plate is to be less than 1.0mm.
3. Door is positioned with its face pressed toward cavity
face plate.
RE-INSTALL
1. Re-install door screen to door frame.
2. Re-install latch spring to the head. Re-install latch
spring to the door frame. Re-install latch head to the
door frame.
4. Check for microwave leakage around door with an
approved microwave survey meter. (Refer to Micro-
wave Measurement Procedure.)
3. Re-install door panel to door frame by fitting ten (10)
tabs of door frame to ten (10) holes of door panel.
4. Put sealer film on door panel. Refer to "Sealer Film"
and figure C-9, on how to handle the new film.
5. Catchtwo(2)pinsofdoorpanelontwo(2)holeofupper
and lower oven hinges.
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
cycle. This function does not require that door be
air-tight, moisture (condensation)-tight or light-
tight. Therefore, occasional appearance of mois-
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R-210A
ture, light or sensing of gentle warm air movement
around oven door is not abnormal and do not of
themselves indicate a leakage of microwave en-
ergy from oven cavity.
PIN
UPPER
OVEN HINGE
DOOR PANEL
CHOKE
COVER
LOWER
OVEN
HINGE
PIN
Figure C-8. Door Replacement
SEALER FILM
Installation
1. Put the adhesive tape on the backing film of the sealer
film as shown in Fig. C-9.
2. Tear the backing film by pulling the adhesive tape.
3. Put the pasted side of the sealer film on the door panel.
Sealer film
Backing film
Adhesive tape
Figure C-9. Sealer film
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R-210A
MICROWAVE MEASUREMENT
Recommended instruments are:
NARDA 8100
NARDA 8200
HOLADAY HI 1500
After adjustment of door latch switches, monitor switch
and door are completed individually or collectively, the
following leakage test must be performed with a survey
instrument and it must be confirmed that the result meets
the requirements of the performance standard for micro-
wave oven.
SIMPSON 380M
2. Place the oven tray into the oven cavity.
3. Place the load of 275 ± 15ml of water initially at 20
± 5˚C in the centre of the oven tray. The water
container should be a low form of 600 ml beaker with
inside diameter of approx. 8.5cm and made of an
electrically non-conductive material such as glass
or plastic.
REQUIREMENT
Thesafetyswitchmustpreventmicrowaveradiationemis-
sion in excess of 5mW/cm2 at any point 5cm or more from
external surface of the oven.
The placing of this standard load in the oven is impor-
tant not only to protect the oven, but also to insure that
any leakage is measured accurately.
PREPARATION FOR TESTING:
Before beginning the actual test for leakage, proceed as
follows;
1. Make sure that the test instrument is operating nor-
mally as specified in its instruction booklet.
Important:
4. Close the door and turn the oven ON with the timer set
for several minutes. If the water begins to boil before
the survey is completed, replace it with 275ml of cool
water.
Survey instruments that comply with the requirement
for instrumentations as prescribed by the performance
standard for microwave ovens must be used for test-
ing.
5. Move the probe slowly (not faster that 2.5cm/sec.)
along the gap.
6. The microwave radiation emission should be meas-
ured at any point of 5cm or more from the external
surface of the oven.
SHARP
mW cm 2
mW cm 2
Microwave leakage measurement at 5 cm distance
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R-210A
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. TIMER KNOB AT "0" POSITION.
NOTE: " " indicates components with potential above 250V.
Figure O-1 Oven Schematic-OFF Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. VARIABLE COOKING CONTROL "HIGH"
3. TIMER ON
Figure O-2 Oven Schematic-ON Condition
20
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R-210A
6
4
5
2
1
3
H . V . R E C T I F I E R
A
B
C
D
E
F
A
B
C
D
E
F
G
G
H
H
6
4
5
2
1
3
21
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R-210A
PARTS LIST
Note: The parts marked "∆" may cause undue microwave exposure.
The parts marked "*" are used in voltage more than 250V.
REF. NO.
PART NO.
DESCRIPTION
Q'TY CODE
ELECTRIC PARTS
1- 1
1- 2
1- 3
1- 4
1- 5
1- 6
1- 7
1- 8
1- 9
1-10
1-11
1-12
1-13
1-14
1-15
1-15-1
1-16
QSWTEA126WRE0 Timer motor 30min.
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
BD
AK
AK
AQ
AG
AQ
AV
AX
BN
AE
AS
BS
AL
AK
AT
AD
AK
QSW-MA110WRE0 1st. latch switch & 2nd. latch switch
QSW-MA111WRE0 Monitor switch
QACCJA058WRE0 Power supply cord
QSOCLA021WRE0 Oven lamp socket
FH-DZA047WRK0 High voltage rectifier
RC-QZA200WRE0 High voltage capacitor
RMOTEA366WRE0 Fan motor
*
*
RV-MZA198WRE0 Magnetron
RLMPTA030WRE0 Oven lamp
RMOTDA211WRE0 Turntable motor
RTRN-A550WRE0 Power transformer
RTHM-A079WRE0 Thermal cut-out 95˚C
QFS-TA038WRE0 Temperature fuse 120˚C
FPWBFA280WRK0 Noise filter
∆
*
*
QFS-GA041WRE0 Fuse 13A
QFS-IA004WRE0 H.V. fuse 0.6A
*
CABINET PARTS
2- 1
2- 2
2- 3
GCABUA602WRP0 Outer case cabinet
GDAI-A269WRP0 Bottom plate
GLEGPA023WRE0 Foot
1
1
2
AX
AS
AB
CONTROL PANEL PARTS
3- 1
3- 2
3- 3
3- 4
3- 5
HPNLCB393WRR0 Control panel
JBTN-B071WRF0 Open button
JKNBKA578WRF0 Timer knob
JKNBKA579WRF0 Vari knob
1
1
1
1
1
AW
AF
AF
AF
AB
MSPRCA050WRE0 Open button spring
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
4-16
4-17
4-18
4-19
4-20
PHOK-A086WRF0 Latch hook
LANGQA470WRW0 Light mount plate
PCUSUA194WRP0 Cushion
LBNDKA095WRP0 Capacitor holder
NFANJA029WRE0 Fan blade
PDUC-A623WRP0 Fan duct
FOVN-A411WRT0 Oven cavity
GLEGPA062WRF0 Leg
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
AQ
AV
AC
AM
AL
AK
BL
AK
AQ
AL
AM
AB
AE
AG
AP
AG
AB
AE
AG
AD
LANGTA318WRP0 Chassis support
MLEVPA206WRF0 Switch lever
PCOVPA276WRE0 Waveguide cover
PCUSUA461WRP0 Cushion
PCUSUA443WRP0 Cushion
PCOVPA334WRE0 HVC cover
LANG-A061WRP0 Air guide
PPACGA097WRE0 O-ring
PCUSGA312WRP0 Cushion
PCUSUA235WRP0 Cushion
PCUSUA270WRP0 Cushion
PCUSUA197WRP0 Cushion
DOOR PARTS
∆
∆
5- 1
5- 2
5- 3
5- 4
5- 5
5- 6
5- 7
5- 8
FDORFA296WRT0 Door panel
GWAKPA516WRF0 Door frame
HPNL-A669WRR0 Door screen
LSTPPA154WRF0 Latch head
MSPRTA084WRE0 Latch spring
PSHEPA333WRE0 Sealer film
XCPSD40P06000 Screw : 4mm x 6mm
GCOVHA377WRF0 Choke cover
1
1
1
1
1
1
4
1
AT
AY
AS
AG
AB
AE
AA
AK
∆
MISCELLANEOUS
6- 1
6- 2
6- 3
6- 4
6- 5
6- 6
6- 7
6- 8
6- 9
FROLPA046WRK0 Turntable support
NTNT-A034WRF0 Turntable
TINS-A634WRR0 Operation manual
FW-VZB647WRE0 Main wire harness
TSPCNC539WRR0 Rating label
TCAUHA214WRR0 K caution label
LHLDWA056WRE0 Cable clip
1
1
1
1
1
1
1
1
1
AQ
AM
AT
AX
AD
AC
AC
AE
AF
QW-VZA126WRE0 Earth wire
TLABMA558WRR0 Menu label
22
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R-210A
Note: The parts marked "∆" may cause undue microwave exposure.
The parts marked "*" are used in voltage more than 250V.
REF. NO.
PART NO.
DESCRIPTION
Q'TY CODE
6-10
TLABPA032WRR0 Grounding label
1
AG
SCREWS,NUTS AND WASHERS
7- 1
7- 2
7- 3
7- 4
7- 5
7- 6
7- 7
7- 8
7- 9
7-10
7-11
7-12
7-13
XEPSD30P08XS0 Screw : 3 mm x 8mm
1
8
AA
AA
AB
AB
AA
AA
AA
AA
AA
AB
AA
AA
AA
XFPSD40P08K00 Screw : 4mm x 8mm
LX-EZA042WRE0 Special screw
2
LX-WZA028WRE0 Special washer
1
XHTSD40P08RV0 Screw : 4mm x 8mm
XFPSD30P06000 Screw : 3mm x 6mm
XOTSD40P12RV0 Screw : 4mm x 12mm
XOTSD40P12000 Screw : 4mm x 12mm
XOTSE40P08000 Screw : 4mm x 8mm
XBPBW40P10000 Screw : 4mm x 10mm
XHTSD40P12RV0 Screw : 4mm x 12mm
XNEBW40-32000 Nut : 4mm x 3.2mm
XWVSD40-05000 Washer : 4mm x 0.5mm
2
1
11
3
4
1
1
2
1
HOW TO ORDER REPLACEMENT PARTS
To have your order filled prompty and correctly, please furnish the following information.
1. MODEL NUMBER
3. PART NO.
2. REF. NO.
4. DESCRIPTION
INFORMATION FOR PARTS CHANGE
The foot will be changed as follows, and new parts will be used for products from serial number 9712xxxxx.
Interchangeability
A. OLD
NEW
B. OLD
NEW
C. OLD
NEW
D. OLD
NEW
↔
→
←
REPLACEMENT PART NO.
OLD No.
Interchange- EFFECTIVE
REF.NO.
2- 3
DESCRIPTION
Q'ty
NEW No.
Q'ty ability
FROM
CODE
Foot
GLEGPA023WRE0
2 GLEGPA074WRE0
2
A
DEC/ '97
AC
TOP PAD ASSEMBLY
FPADBA332WRK0
PACKING AND ACCESSORIES
POLYETHYLENG BAG
SSAKHA014WRE0
TURNTABLE TRAY
OPERATION MANUAL
MICROWAVE OVEN
BOTTOM PAD ASSEMBLY
FPADBA333WRK0
TURNTABLE SUPPORT
INTO THE
OVEN CAVITY
PACKING CASE
SPAKCC999WRE0
Not replaceable items.
TRAY PAD ASSY
(CPADBA172WRK0)
23
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R-210A
6
4
5
2
1
3
7-7
OVEN AND CABINET PARTS
A
A
B
C
D
E
F
7-7
7-7
2-1
4-19
1-5
7-9
1-10
B
C
D
E
F
7-8
7-2
7-7
7-6
7-2
1-13
1-9
6-5
4-2
4-12
4-15
1-14
7-9
4-3
6-6
4-13
6-10
4-5
7-8
7-2
7-12
4-6
6-8
7-5
4-7
1-8
1-4
4-20
4-14
7-11
1-6
7-7
4-11
6-2
1-7
1-16
1-2
7-4
7-2
7-13
7-10
4-16
7-2
6-7
1-15-1
4-1
4-17
4-10
4-4
1-15
7-2
1-11
1-3
1-2
6-1
7-3
2-2
1-12
4-9
4-18
7-8
7-7
G
G
7-7
2-3
7-7
2-3
4-8
7-7
H
H
6
4
5
2
1
3
24
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R-210A
6
4
5
2
1
3
CONTROL PANEL PARTS
3-4
A
B
C
D
E
F
A
1-1
7-1
B
C
D
E
F
3-3
3-1
3-2
5-8
3-5
5-6
5-7
5-1
DOOR PARTS
5-2
5-7
5-3
5-7
5-4
5-5
G
G
MISCELLANEOUS
6-9
6-4
H
H
Actual wire harness may be different than illustration.
6
4
5
2
1
3
25
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R-210A
'97SHARP CORP. (11K0.100E) Printed in Japan
26
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