Sanyo EM-842WS Operating manual

CAUTIONCAUTION
CAUTIONCAUTION
CAUTION
WW
WW
WARNING TO SERARNING TO SER
ARNING TO SERARNING TO SER
ARNING TO SERVICE TECHNICIANSVICE TECHNICIANS
VICE TECHNICIANSVICE TECHNICIANS
VICE 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) A microwave leakage check to verify compliance with the Federal performance standard should be performed
on each oven prior to release to the owner.
REFERENCE NO. SS-860262
File No :File No :
File No :File No :
File No :
SUPPLEMENT OFSUPPLEMENT OF
SUPPLEMENT OFSUPPLEMENT OF
SUPPLEMENT OF MicrMicr
MicrMicr
Microwave Ovenowave Oven
owave Ovenowave Oven
owave Oven EM-P842WS (U.S.A.)EM-P842WS (U.S.A.)
EM-P842WS (U.S.A.)EM-P842WS (U.S.A.)
EM-P842WS (U.S.A.)
SERSER
SERSER
SERVICE MANUALVICE MANUAL
VICE MANUALVICE MANUAL
VICE MANUAL
PrPr
PrPr
Product Code No.oduct Code No.
oduct Code No.oduct Code No.
oduct Code No. 437 480 04437 480 04
437 480 04437 480 04
437 480 04
See the Service Manual of EM-P672WS (SM-860245)
except the items described in this Service Manual.

In the area emitting the highest reading, switch the meter
to SLOW RESPONSE, and take a reading for minimum of
three (3) seconds. We recommended the pattern outline
shown below when the door surface is surveyed.
NOTENOTE
NOTENOTE
NOTE : Periodically check to be sure that the probe tip is
not worn or dirty.
The following U.S. standard applies to microwave ovens :
21 CFR 1030.10, Performance Standard for Microwave
Ovens.
It requires that the power density of the microwave
radiation emitted by a microwave oven shall not exceed
five (5) milliwatts per square centimeter at any point 5
centimeter (about 2 inches) or more from the external
surface of the oven.
All microwave ovens exceeding the emission level of
4mW/cm2must be reported to Dept. of Service for
microwave ovens and the manufacturer immediately and
the owner should be told not to use the microwave oven
until it has been repaired completely.
If a microwave oven is found to operate with the door open,
report to Dept. of Service, the manufacturer and CDRH*
immediately. Also tell the owner not to use the oven.
*CDRH : Center for Device and Radiological Health.
The interlock monitor switch acts as the final safety switch
protecting the customer from microwave radiation. If the
interlock monitor switch operates to blow the fuse with
interlocks failed, you must replace all interlock switches
primary and secondary interlock switches and the monitor
switch with new ones because the contacts of those
interlock switches may be melted and welded together.
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION
For micrFor micr
For micrFor micr
For microwave enerowave ener
owave enerowave ener
owave energy emissiongy emission
gy emissiongy emission
gy emission
On every service calls, check for microwave energy
emission, must be made according to the following manner.
MeasurMeasur
MeasurMeasur
Measurement of enerement of ener
ement of enerement of ener
ement of energy emissiongy emission
gy emissiongy emission
gy emission
Measurement must be made with the microwave oven
operating at its maximum output and containing a load of
275±15 milliliters of tap water initially at 20o±5ocelsius (68
±9oF) placed within the cavity at the center.
NOTENOTE
NOTENOTE
NOTE : The water container must be a 600 milliliter beaker
and made of an electrically none conductive
material such as glass or plastic.
The cook tray must be in place when measuring
emission.
A properly operating door and seal assembly will normally
register emission on greater than 4mW/cm2 to allow for
measurement uncertainty with the cooking shelf or tray in
place.
All repairs must be performed in such a mannerAll repairs must be performed in such a manner
All repairs must be performed in such a mannerAll repairs must be performed in such a manner
All repairs must be performed in such a manner thatthat
thatthat
that
micrmicr
micrmicr
microwave enerowave ener
owave enerowave ener
owave energy emission argy emission ar
gy emission argy emission ar
gy emission are minimal.e minimal.
e minimal.e minimal.
e minimal.
Follow the instructions supplied with a detector being used
and performed an R.F. emission test around the door front
and edges and all edges and vent of the outer case. The
cabinet (wrapper) must be in place and the oven fully
assembled.
When performing emission survey, with the meter on FAST
RESPONSE the movement of a detector probe shall not
exceed one (1) inch per second.
- i -

(C) 1. Set cooking time to two (2) minutes. (“2 00”
appears in display)
2. Touch “START” key and operate oven for exactly
two (2) minutes.
(D) 1. Take out the two bowls at once.
2. Stir both water with thermometer and measure the
water temperature rise respectively.
(E) 1 . Get temperature rise by calculation the difference
(water temperature after cooking minus initial
temperature) in each bowl.
2 . Then calculate average value(t) of both temperature
rises in degrees centigrade.
3. Then work out :
Power Output (watt) = 70 x ∆t
Where ∆t is an Average Temperature Rise in degrees
centigrade.
(F) Power Output shall be in the following range :
(G) Power Output will be influenced by line voltage of
power supply. Consequently, correct power output
must be measured within 120V AC ± 1 volt while
unit is operating.
- 1 -
Exploded View and Parts List ................................ 3 ~8
Overall Circuit Diagram .......................................... 9
Specifications .................................................................. 1
Power Output Measurement ........................................... 1
Circuit Diagram ............................................................... 2
1. SPECIFICA1. SPECIFICA
1. SPECIFICA1. SPECIFICA
1. SPECIFICATIONSTIONS
TIONSTIONS
TIONS
Rated Power Consumption ... 1650W.
Microwave Output ................. 1100W.
Frequency .............................. 2,450MHz±50MHz.
Power Supply ......................... 120V±12V, 60Hz.
Rated Current ........................ 14.0 Amp.
Safety Devices ...................... Thermal Fuse open at
332oF (167oC) for Cavity.
Thermal Protector open at
275oF (135oC) for Magnetron.
Fuse (Cartridge Type 20A),
Primary Interlock Switch,
Door Sensing Switch and
Relay 2.
Interlock Monitor Switch.
Timer ...................................... Electronic Digital, up to
99min. 99 sec.
Overall Dimensions ............... 237/16”(W) x 175/16”(D) x 141/4”(H).
Oven Cavity Size ................... 163/8”(W) x 157/8”(D) x 111/8”(H).
Turn Table Diameter ............... 125/8”
Effective Capacity of
Oven Cavity ........................... 1.9 Cubic Feet.
Net Weight ............................ Approx. 44 Lbs.
2. POWER OUTPUT MEASUREMENT2. POWER OUTPUT MEASUREMENT
2. POWER OUTPUT MEASUREMENT2. POWER OUTPUT MEASUREMENT
2. POWER OUTPUT MEASUREMENT
NOTENOTE
NOTENOTE
NOTE
The Power Output specification 1100W on this model
is measured with IEC measurement. The Power Output
is measured with two (2) liters water is equivalent to
1100W in measurement with IEC, when measured with
the following power output.
(A) 1. Fill two test bowls with each 1 liter water respectively.
2 . Use accurate thermometer and measure each
water temperature respectively.
(B) Place the two bowls on glass turntable.
- TABLE OF CONTENTS -
Average Microwave
Temperature Rise Power Output
Minimum
22.9oF (12.7oC) 889 W
Maximum
29.3oF (16.3oC) 1141 W

WIRING COLOR
O : ORANGE B K : BLACK
R : RED BL : BLUE
W : WHITE Y : YELLOW
- 2 -- 2 -
3. CIRCUIT DIAGRAM3. CIRCUIT DIAGRAM
3. CIRCUIT DIAGRAM3. CIRCUIT DIAGRAM
3. CIRCUIT DIAGRAM
Figure 1Figure 1
Figure 1Figure 1
Figure 1

- 3 -
4.4.
4.4.
4.EXPLODED VIEW AND PEXPLODED VIEW AND P
EXPLODED VIEW AND PEXPLODED VIEW AND P
EXPLODED VIEW AND PARAR
ARAR
ARTS LISTTS LIST
TS LISTTS LIST
TS LIST
CAVITY PARTS
NoteNote
NoteNote
Note : Screws securing Cabinet cannot be removed by regular screwdriver.
KEY NO. 26. SPECIAL SCREW REQUIRES SPECIAL DRIVER
(PART NO. 617 209 3734) OR SPECIAL BIT (PART NO. 617 209 3741)
* * * ALL SERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUALIFIED TECHNICIAN USING
APPROVED TESTING EQUIPMENT. CUSTOMERS SHOULD NOT ATTEMPT TO REPLACE PARTS IDENTIFIED
BY A TRIPLE ASTERISK (***).
Key Part No. Description Q’ty
No.
1 617 186 5943 Cabinet 1
2 411 082 5201 SCR TPG TRS 4 x 10 Z1 8
3 411 160 6007 SCR TPG TRS + SRT 4 x 10 Z1 3
4 617 216 8913 Power Cord 1
5 411 160 6106 SCR S-T TRS + SRT 4 x 10 Z1 1
6 617 200 5126 Oven Cavity*** (Not Service Part) 1
7 617 124 1068 Gear Motor 1
8 411 010 5808 SCR EVR PAN 4 x 10 Z1 2
9 617 144 4568 Bottom Plate*** (Not Service Part) 1
10 617 221 6089 Plastic Foot with Canoe Clip 4
11 411 011 0802 Bolt Hex + SW + W5 x 14 Z1*** 2
12 617 174 9007 Hinge, Lower*** 1
13 411 089 2500 Washer F 5 x 10 x 0.8 1
Key Part No. Description Q’ty
No.
14 617 120 8481 Insulation Sheet 1
15 617 144 4476 Turn Table Shaft 1
16 617 199 1048 Roller Base Assy 1
17 617 201 2704 Rotating Tray 1
18 617 214 8304 Antenna Complete 1
19 617 162 1938 Cavity Cover 1
20 411 069 1707 SCR TPG TRS 4 x 6 DA 1
21 411 006 6604 SCR TPG PAN 3 x 6 Z1 1
22 617 200 0381 Thermal Fuse 167oC1
23 617 080 5315 Special Washer 1
24
25
26 617 208 4176 Special Screw 2

SWITCHES AND MICROWAVE PARTS
- 4 -
*** ALL SERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUALIFIED TECHNICIAN USING
APPROVED TESTING EQUIPMENT. CUSTOMERS SHOULD NOT ATTEMPT TO REPLACE PARTS IDENTIFIED
BY A TRIPLE ASTERISK (***).
Key Part No. Description Q’ty
No.
17 617 197 7417 Blower Motor 1
18 411 082 5201 SCR TPG TRS 4 x 10 Z1 2
19 617 196 8507 Blower Fan 1
20 617 245 6256 Latch Lever*** 1
21 617 152 4741 Micro Switch,*** Primary Interlock 1
V-5930D
22 617 004 5575 Micro Switch,*** Interlock Monitor 1
V-5220DZ
23 617 152 4741 Micro Switch,*** Door Sensing 1
V-5930D
24 617 124 1198 Latch Lever,*** 1
25 617 245 6096 Lever Stopper*** 1
26 411 102 5907 SCR ETG TRS 4 x 10 N2 2
27 411 129 5805 SCR TPG BIN 3 x 10 Z1 1
28 617 117 3505 Harness, Door Sensing 1
29 617 124 2300 Lead Wire Ass’y 1
30 617 214 8328 Duct, Mag. Intake 1
Key Part No. Description Q’ty
No.
1 411 082 5201 SCR TPG TRS 4 x 10 Z1 9
2 617 213 6936 H.V. T ransformer,*** N6T-P691 1
120V 60Hz
3 617 162 1945 Stay, Cavity & Magnetron 1
4 411 006 6604 SCR TPG PAN 3 x 6 Z1 1
5 617 129 1001 Thermostat, Magnetron 135oC1
6 415 002 3308 Magnetron, 2M247H(B)*** 1
7 423 021 3704 Fuse, 250V 20A 1
8 617 137 8269 Fuse Holder 1
9 617 201 6382 Lead Wire Ass’y (including Diode) 1
10 617 162 1990 Blower Base 1
11 617 205 1840 H.V Capacitor including Resistor, 1
1.03uf 2.1KV
12 617 182 2373 Capacitor Band 1
13 411 011 5609 Bolt Hex 4 x 10 Z1 4
14 617 198 4996 Duct, Mag. Exhaust 1
15 617 188 0205 Lamp, 120V 20W 1
16 617 124 1280 Lamp Socket 1

- 5 -
DOOR PARTS
* * * ALL SERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUALIFIED TECHNICIAN USING
APPROVED TESTING EQUIPMENT. CUSTOMERS SHOULD NOT ATTEMPT TO REPLACE PARTS IDENTIFIED
BY A TRIPLE ASTERISK (***).
Key Part No.Description Q’ty
No.
5 617 144 4636 Door Sheet 1
6 411 054 1903 Nut Hex + Flg W / SRT 5*** 2
7 617 124 0955 Hinge, Upper*** 1
8 411 011 0802 Bolt Hex + SW + W 5 x 14*** 2
9 617 101 1494 Spring*** 1
10 617 179 2478 Door Latch*** 1
Key Part No. Description Q’ty
No.
1 617 171 5026 Door Cover*** 1
2 617 199 5351 Door Panel*** 1
3 617 199 2373 Door Main Frame*** (Also 1
order Door Sheet when replacing
Door Main Frame)
4 617 144 4643 Choke Dielectric*** 1

- 6 -
CONTROL PANEL PARTS
Key Part No. Description Q’ty
No.
617 220 9562 Operating Instructions 1
(English / Spanish)
617 223 5004 Carton Box Complete 1
617 223 4960 Name Plate 1
PRINTED MATTER (Items Not Illustrated)
* * * ALL SERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUALIFIED TECHNICIAN USING
APPROVED TESTING EQUIPMENT. CUSTOMERS SHOULD NOT ATTEMPT TO REPLACE PARTS IDENTIFIED
BY A TRIPLE ASTERISK (***).
Key Part No. Description Q’ty
No.
4 617 171 5828 Control Frame*** 1
5 617 144 4780 Control Base*** 1
6 411 160 6205 SCR TPG TRS+SRT 4 x 10 Z1 1
7 617 221 5518 Power & Control Circuit Board*** 1
8 411 129 5805 SCR TPG BIN 3 x 10 Z1 2
9 617 080 9559 Spring, Door Release Lever*** 2
10 617 186 2706 Door Release Lever*** 1
Key Part No. Description Q’ty
No.
1 617 222 1434 Control Sheet*** (Also order 1
Touch Key Board when replacing
Control Sheet)
2 617 219 4608 Touch Key Board*** (Also order 1
Control Sheet when replacing
Touch Key Board)
3 617 186 2737 Control Plate*** 1

- 7 -
CONTROL CIRCUIT BOARDCONTROL CIRCUIT BOARD
CONTROL CIRCUIT BOARDCONTROL CIRCUIT BOARD
CONTROL CIRCUIT BOARD
(Part No. 617 221 5518617 221 5518
617 221 5518617 221 5518
617 221 5518)
3470034700
3470034700
34700

- 8 -
Key No. Order Part No. Description Q’ty
RESISTORS.
R105 401 012 4404 Carbon, 100 ohms 1
± 5%, 1/4W.
R101, 112 401 012 5609 Carbon, 1K ohms 7
121 ~125 ± 5%, 1/4W.
R15, 102, 401 012 6903 Carbon, 10K ohms 4
109, 114 ± 5%, 1/4W.
R16, 56, 58 401 013 6308 Carbon, 12K ohms 3
± 5%, 1/4W.
R13, 14 401 016 2505 Carbon, 220 ohms 2
± 5%, 1/4W.
R11 401 016 3700 Carbon, 2.2K ohms 1
± 5%, 1/4W.
R106, 107 401 016 9603 Carbon, 27 ohms 2
± 5%, 1/4W.
R113 401 017 1705 Carbon, 2.7K ohms 1
± 5%, 1/4W.
R110 401 018 2701 Carbon, 330 ohms 1
± 5%, 1/4W.
R111 401 018 3708 Carbon, 3.3K ohms 1
± 5%, 1/4W.
R108, 401 020 1907 Carbon, 4.7K ohms 7
115 ~120 ± 5%, 1/4W.
R51, 53 401 020 2805 Carbon, 47K ohms 3
103 ± 5%, 1/4W.
R12 401 021 2903 Carbon, 5.6K ohms 1
± 5%, 1/4W.
R104 401 023 1607 Carbon, 820 ohms 1
± 5%, 1/4W.
MISCELLANEOUS.
BZ1 420 000 6800 Buzzer PKM22EPT. 1
VST1 407 118 5505 Varistor ENC 471D-10A. 1
DT1 617 185 3735 Display Tube. 1
RL1 617 201 3978 Relay, G5N-1A-DC12. 1
RL2 617 141 0549 Relay, DU12D1-1PR 1
RS1 617 128 3372 Ceramic Oscillator 1
S 1 617 169 4109 Connector. 1
S101 617 126 8959 Connector, 11P. 1
S102 617 111 1392 Connector, 2/3P, Male. 1
PT1 617 178 3933 Step-down Transformer 1
P6TK-N101.
2 617 079 4107 Spacer. 1
JB2 617 132 5744 Noise Filter. 1
JB3 617 144 9259 Noise Filter. 1
J1, 3 ~6 617 079 4299 Jumper. 5
J101 ~108 617 079 4237 Jumper. 8
Key No. Order Part No. Description Q’ty
INTEGRATED CIRCUIT.
IC11 409 452 0901 IC LM8846-124FP 1
TRANSISTORS.
Q104 405 011 8401 2SC1740S-Q-TP 1
Q101, 105 405 082 4609 DTA123YS-TP 2
Q11, 12 405 004 3000 2SA564A-Q-T93 2
Q102, 103 405 000 1802 DTA143XS-TP 2
DIODES.
D11, 12 407 012 0200 IN4002-TP 2
D101 ~107 407 012 4406 ISS133-TP 7
ZD101 407 132 2306 HZS3.9NB2 1
ZD11 407 057 0500 RD5.6ESB3 1
ZD12 407 160 6703 RD27ESB1 1
ZD13 407 132 2306 HZS3.9NB2 1
CAPACITORS.
C103 ~107 403 069 8305 Ceramic, 0.01mfd, 5
± 5%, 50V.
C102 403 002 4708 Ceramic, 0.1mfd, 1
± 5%, 25V.
C101 403 147 8807 Electrolytic, 1mfd, 1
± 20%, 50V.
C13 403 147 8609 Electrolytic, 47mfd, 1
± 20%, 10V.
C12 403 152 7307 Electrolytic, 100mfd, 1
± 20%, 35V.
C11 403 188 8408 Electrolytic, 470mfd, 1
± 20%, 25V.
CONTROL CIRCUIT BOARDCONTROL CIRCUIT BOARD
CONTROL CIRCUIT BOARDCONTROL CIRCUIT BOARD
CONTROL CIRCUIT BOARD
(Part No. 617 221 5518617 221 5518
617 221 5518617 221 5518
617 221 5518)