SERVICE MANUAL SUPPLEMENT
for Model EM-S85M
Microwave Oven
CAUTION
WARNING TO SERVICE TECHNICIANS
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING
SERVICING TO AVOID POSSIBLE EXPOSURE TO
EXCESSIVE MICROWAVE ENERGY
(a) Do not operate or allow the oven to be operated with the door open.
(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwave source, and make repairs as necessary:
(1)Interlock operation, (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other
damage), (4) damage to or loosening of hinges and latches, (5) evidence of dropping or abuse.
(c) Before turning on microwave power for any service test or inspection within the microwave generating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment,
integrity, and connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation
and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual
before the oven is released to the owner.
(e)(i) A microwave leakage check to verify compliance with the Federal performance standard should be
performed on each oven prior to release to the owner. (For U.S.A)
(e)(ii) A microwave leakage check to verify compliance with the Canadian Regulation, HEALTH AND WELFARE,
SOR/79-920 should be performed on each oven prior to release to the owner. (For CANADA)
FORM # EM-S85M (02/05)
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4. PRECAUTIONS AND REPAIR SERVICE TIPS
2. SPECIFICATIONS
PRELIMINARY
Rated Power Consumption . . . 1260W.
Microwave Output . . . . . . . . . . 850W.
Frequency . . . . . . . . . . . . . . . . 2,450MHz±50MHz.
Power Supply . . . . . . . . . . . . . 120V, 60Hz.
Rated Current . . . . . . . . . . . . . 11.1 Amp.
Safety Devices . . . . . . . . . . . . Thermal Fuse open
at 167oC for Cavity
A. SINCE NEARLY 2,000 VOLTS EXISTS IN SOME
CIRCUITS OF THIS MICROWAVE OVEN, REPAIRS SHOULD
BE CARRIED OUT WITH GREAT CARE.
B. TO AVOID POSSIBLE EXPOSURE TO MICROWAVE ENEGY
LEAKAGE, THE FOLLOWING PRECAUTIONS MUST BE
TAKEN BEFORE SERVICING.
Thermal Protector open
(1)
(a)
Before the power is applied :
at 122oC for Magnetron
Open and close door several times to make sure the prima-
ry interlock switch, the interlock monitor switch and the door
sensing switch operate properly. (Listen for the clicking
sound from the switches.) Make sure the interlock monitor
switch closes after the primary interlock switch is opens
when the door is opened.
Fuse (Cartridge Type 15A)
Primary Interlock Switch
Secondary Interlock Switch
Interlock Monitor Switch.
Timer . . . . . . . . . . . . . . . . . . . 60 min.
Overall Dimensions . . . . . . . . . 525(W) x 427(D) x 283(H)
mm.
Oven Cavity Size . . . . . . . . . . . 350(W) x 371(D) x 208(H)
mm.
(See pages 1 and 6)
(b)
Make sure the perforated screen and the choke dielectric of
the door are correctly mounted.
Turn Table Diameter . . . . . . . . 340mm.
Effective Capacity of
Oven Cavity . . . . . . . . . . . . . . 25 liters.
Net Weight . . . . . . . . . . . . . . . Approx. 16kg.
(2)
(a)
After the power is applied :
Open and close the door to see if the interlock mechanism
operates properly.
(b)
(3)
Check microwave energy leakage with a leakage detector
and confirm the energy leakage is below 5 mW/cm2.
Do not operate the unit until it is completely repaired, if any
of the following conditions exists:
3. POWER OUTPUT MEASUREMENT
(a)
(b)
(c)
(d)
NOTE
Door does not close firmly against the cavity front.
The hinge is broken.
The power output specification, 850 W on this model is
measured with IEC measurement. The power output is
measured with two (2) liters water is equivalent
to 850 W in measurement with IEC, when measured with
the following power output.
The choke dielectric or the door seal is damaged.
The door is bent or warped, or there is any other visible dam-
age to the oven that may cause microwave energy leakage.
NOTE : Always keep the seal clean.
(e)
Make sure there are no defective parts in the microwave
generating and transmission assembly. (especially wave-
guide).
(A) 1.Fill two beakers with one liter of tap water respectively
2.Use accurate thermometer and measure each water
temperature respectively.
(4)
(a)
(b)
(c)
(d)
(e)
The following items should be checked after the unit is
repaired :
(B) Place beakers side by side in the centre of the glass tray.
The interlock monitor switch is connected correctly and firm-
ly.
(C) 1.Set the timer at any position more than 2 minutes.
2.Heat the water correctly for 2 minutes.
The magnetron gasket on the magnetron is properly posi-
tioned.
(D)
(E)
Take the beakers out, immediately stir the water and mea-
sure the water temperature respectively.
Waveguide and oven cavity are intact (no leakage of
microwave energy).
1.Calculate the temperature rise of water in each beaker.
2.Then calculate the average value of two temperature
rises.
The door can be properly closed and the safety switches
work properly.
3.Output power can be calculated by the equation;
Power Output (W) = 70 x Dt
Where Dt is an average temperature rise in degrees
Centigrade.
The oven must be stopped when the door is opened or the
time is up.
(F)
Power Output shall be in the following range :
AverageTemperature Rise Power Output
The oven must not be operated with any of the
above components removed or bypassed.
Minimum
Maximum
9.9oC
693W
889W
12.7oC
(G)
Power Output is affected by the line voltage under load.
For correct Power Output measurement, the line voltage
under load must be 120± 2volts.
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5. CIRCUIT DIAGRAM
NOTE : All component have special characteristics for safety and must be replaced using parts listed in this manual.
All service on M/W ovens should be performed by a qualified technician using approved testing equipment.
symbol.
Customers should not attempt replace component marked with a
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6. TEST PROCEDURES AND TROUBLESHOOTING
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7. DISASSEMBLY INSTRUCTIONS
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8. EXPLODED VIEW AND PARTS LIST
CAVITY PARTS
NOTE : All component have special characteristics for safety and must be replaced using parts listed in this manual.
All service on M/W ovens should be performed by a qualified technician using approved testing equipment.
symbol.
Customers should not attempt replace component marked with a
Key
No.
Key
No.
1
2
3
4
5
6
7
Part No.
Description
Q’ty.
Part No.
Description
Q’ty.
14 617 120 8481 Washer
15 617 220 5052 Receptacle
16 617 199 1048 Rest
17 617 215 2714 Turn Table
18 617 181 4248 Antenna Complete
19 617 162 1938 Protective Cover
20 411 069 1707 SCR TPG TRS 4 x 6 DA
21 411 006 6604 SCR TPG PAN 3 x 6 Z1
22 617 200 0381 Thermal Fuse 167°C
23 617 080 5315 Special Washer
24 617 224 1081 Protective Cover
25 617 224 1098 Protective Cover
26 617 225 2377 Cover
1
1
1
1
1
1
1
1
1
1
1
1
1
617 186 2072 Cabinet
1
9
1
1
1
1
1
2
1
4
2
1
1
411 082 5201 SCR TPG TRS 4 x 10 Z1
411 160 6007 SCR TPG TRS + SRT 4 x 10 Z1
617 182 7675 Power Cord
411 160 6106 SCR S-T PAN 4 x 10 Z1
617 224 3467 Oven Cavity (Not Service Part)
617 150 2657 Gear Motor
8
9
411 010 5808 SCR EVR PAN 4 x 10 Z1
617 138 5601 Bottom Plate (Not Service Part)
10 617 221 6096 Plastic Foot with Canoe Clip
11 411 011 0802 Bolt Hex + SW + W 5 x 14
12 617 180 6137 Hinge, Lower
13 411 089 2500 Washer F5 x 10 x 0.8
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SWITCHES AND MICROWAVE PARTS
NOTE : All component have special characteristics for safety and must be replaced using parts listed in this manual.
All service on M/W ovens should be performed by a qualified technician using approved testing equipment.
symbol.
Customers should not attempt replace component marked with a
Key
No.
1
2
3
4
5
6
7
Key
No.
Part No.
Description
Q’ty.
Part No.
Description
Q’ty.
411 082 5201 SCR TPG TRS 4 x 10 Z1
617 203 8599 H.V.Transformer, N6T-P300
617 199 8283 Stay, Cavity & Magnetron
411 006 6604 SCR TPG PAN 3 x 6 Z1
617 124 1235 Thermostat, Magnetron 122°C
415 002 6002 Magnetron, 2M218H(N)A
423 014 2509 Fuse, 250V 15A
9
1
1
1
1
1
1
1
1
1
1
18 411 082 5201 SCR TPG TRS 4 x 10 Z1
19 617 196 8507 Blower Fan
20 617 124 1181 Latch Lever
21 617 152 4741 Micro Switch, Primary Interlock
V-5930D
22 617 004 5575 Micro Switch, Interlock Monitor
V-5220DZ
23 617 152 4741 Micro Switch, Door Sensing
V-5930D
24 617 124 1198 Latch Lever
25 617 124 1174 Lever Stopper
26 411 102 5907 SCR ETG TRS 4 x 10 N2
27
2
1
1
1
1
1
8
9
617 177 6157 Power PCB
617 180 4447 Lead Wire Ass’y, including Diode
1
1
2
10 617 162 1990 Space Partition (Blower)
11 617 197 6670 H.V.Capacitor including Resistor
0.97 uf 2.2KV.
12 617 182 2373 Capacitor Band
13 411 011 5609 Bolt Hex 4 x 10 Z1
14 617 181 2534 Duct, Mag. Exhaust
15 617 206 9180 Lamp, 125V 15W
16 617 124 1280 Lamp Socket
17 617 197 7417 Blower Motor
1
4
1
1
1
1
28
29 617 124 3796 Lead Wire Assy
30 411 160 6106 SCR S-T TRS + SRT 4 x 10 Z1
31 411 007 5903 SCR TPG BIN 4 x 10 Z1
32 617 208 7689 Clip
1
1
1
2
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DOOR PARTS
NOTE : All component have special characteristics for safety and must be replaced using parts listed in this manual.
All service on M/W ovens should be performed by a qualified technician using approved testing equipment.
symbol.
Customers should not attempt replace component marked with a
Key
No.
1
2
3
Key
No.
6
7
8
Part No.
Description
Q’ty.
Part No.
Description
Q’ty.
617 208 7504 Door Cover
411 178 9908 SCR S-T PG FLT 4 x 8 ZK
617 222 1175 Door Panel
617 208 7481 Door Main Frame (Also order
Door Sheet when replacing
1
2
1
1
617 180 6151 Hinge, Upper
1
2
1
1
1
1
411 011 0802 Bolt Hex + SW + W 5 x 14
617 124 0948 Choke Dielectric
617 124 0931 Door Sheet
4
9
10 617 101 1494 Spring
11 617 179 2478 Door Latch
Door Main Frame)
5
411 054 1903 Nut Hex + Flg W/SRT 5
2
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CONTROL PANEL PARTS
NOTE : All component have special characteristics for safety and must be replaced using parts listed in this manual.
All service on M/W ovens should be performed by a qualified technician using approved testing equipment.
symbol.
Customers should not attempt replace component marked with a
Key
No.
1
2
3
4
5
Key
No.
6
Part No.
Description
Q’ty.
Part No.
Description
Q’ty.
1
617 143 9632 Knob Assy
617 143 9656 Knob Assy
617 209 0573 Control Plate
617 208 7634 Control Frame
617 209 0610 Control Base Assy
1
1
1
1
1
411 160 6205 SCR TPG TRS + SRT 4 x 10 Z1
7
8
9
617 209 0566 Timer Switch
411 006 2804 SCR TPG BIN 4 x 10 Z1
617 080 9559 Spring, Door Release Lever
1
4
2
1
10 617 124 1143 Door Release Lever
PRINTED MATTER (Items Not Illustrated)
Key
No.
Part No.
Description
Q’ty.
617 209 0542 Operating Instructions
617 209 0498 Carton Box Complete
617 209 0436 Name Plate
1
1
1
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