Sanyo EM-P495WS User 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-860259
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-P495WS (U.S.A.)EM-P495WS (U.S.A.)
EM-P495WS (U.S.A.)EM-P495WS (U.S.A.)
EM-P495WS (U.S.A.)
SERSER
SERSER
SERVICE MANUALVICE MANUAL
VICE MANUALVICE MANUAL
VICE MANUAL
The following parts are different from the parts on model EM-P415WS (SM-860251)
PrPr
PrPr
Product Code No.oduct Code No.
oduct Code No.oduct Code No.
oduct Code No. 437 499 03437 499 03
437 499 03437 499 03
437 499 03
See the Service Manual of EM-P415WS (SM-860251)
except the items described in this Service Manual.
Key Part No. Description
No.
CAVITY PARTS
24 617 198 5580 Sensor Assy
25 617 198 5542 Duct, Sensor Assy
DOOR PARTS
1 617 207 6294 Door Cover
2 617 207 6300 Door Panel
Key Part No. Description
No.
CONTROL PANEL PARTS
1 617 221 5853 Control Sheet
2 617 219 4578 Touch Key Board
3 617 207 6317 Control Frame
4 617 207 0377 Control Base
6 617 223 4816 Power & Control Circuit Board
9 617 207 0353 Door Release Lever
* 617 221 9424 Operating Instruction
* 617 223 5882 Carton Box Complete
* 617 223 5844 Name Plate

- 1 -
CONTROL CIRCUIT BOARDCONTROL CIRCUIT BOARD
CONTROL CIRCUIT BOARDCONTROL CIRCUIT BOARD
CONTROL CIRCUIT BOARD
(Part No. 617 223 4816617 223 4816
617 223 4816617 223 4816
617 223 4816)
3610036100 3610036100
36100

- 2 -
Key No. Order Part No. Description Q’ty
RESISTORS.
R13, 14 401 016 2505 Carbon, 220 ohms 2
± 5%, 1/4W.
R105, 11 401 016 3700 Carbon, 2.2K ohms 2
± 5%, 1/4W.
R104, 106 401 016 4707 Carbon, 22K ohms 2
± 5%, 1/4W.
R111, 112 401 016 9603 Carbon, 27 ohms 2
± 5%, 1/4W.
R115 401 017 1705 Carbon, 2.7K ohms 1
± 5%, 1/4W.
R110 401 018 2701 Carbon, 330 ohms 1
± 5%, 1/4W.
R113 401 018 3708 Carbon, 3.3K ohms 1
± 5%, 1/4W.
R117~122 401 020 1907 Carbon, 4.7K ohms 6
± 5%, 1/4W.
R103, 401 020 2805 Carbon, 47K ohms 3
51, 53 ± 5%, 1/4W.
R12 401 021 2903 Carbon, 5.6K ohms 1
± 5%, 1/4W.
R18, 19 401 023 0600 Carbon, 82 ohms 5
253, 254, 261 ± 5%, 1/4W.
R252 401 103 3309 MT-Film, 1.47K ohms 1
± 1%, 1/6W.
R251 401 112 4106 MT-Film, 1.54K ohms 1
± 1%, 1/6W.
R255, 256 401 155 7706 MT-Film, 2.05K ohms 2
± 1%, 1/6W.
R257, 258 401 155 7805 MT-Film, 820K ohms 2
± 1%, 1/6W.
RESISTORS BLOCKS.
RB251 617 122 9066 Resistor Network 1
MISCELLANEOUS.
BZ1 420 000 6800 Buzzer PKM22EPT-2001. 1
VST1 407 118 5505 Varistor ENC 471D-10A. 1
DT1 617 220 9784 Display Tube. 1
RL1 617 137 9358 Relay, OJE-SH-112LM. 1
RL2 617 141 0549 Relay, DEC DU12D1-1PR. 1
RS1 617 128 3372 Ceramic Oscillator. 1
S 1 617 169 4109 Connector. 1
S101 617 126 8959 Connector, 11P, Male. 1
S201 617 002 4396 Connector, 3P, Male. 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
J1 ~4 617 079 4299 Jumper. 4
J101 ~110 617 079 4237 Jumper. 1 0
Key No. Order Part No. Description Q’ty
INTEGRATED CIRCUIT.
IC11 409 459 4407 IC LM8853-369SP 1
IC12 409 057 3000 IC UPC358C 1
TRANSISTORS.
Q11 ~13 405 004 3000 2SA564A-Q-TP 3
Q101 405 082 4609 DTA123YS-TP 1
Q102,105,107 405 000 1802 DTA143XS-TP 3
Q104 405 035 4809 2SC1685-Q-TP 1
Q106 405 141 4106 DTC114YSA-TP 1
Q103 405 000 5602 DTC143XS-TP 1
DIODES.
D11 ~ 13 407 012 0309 IN4003-TP 3
D101 ~107 407 012 4406 ISS133-TP 9
251, 252
ZD14 407 051 4405 GZS13Y-AT1 1
ZD11 407 057 0500 RD5.6ESB3 1
ZD12 407 160 6802 HZS27NB1 1
ZD13, 101 407 132 2306 HZS3.9NB2 2
CAPACITORS.
C258 403 109 3109 Ceramic, 100PK, 1
± 5%, 50V.
C251, 252 403 069 1207 Ceramic, 1000PK, 4
255, 256 +80 -20%, 50V.
C102 403 002 4708 Ceramic, 0.1mfd, 1
± 5%, 25V.
C103 ~105, 403 069 8305 Ceramic, 0.01mfd, 4
257 ± 5%, 50V.
C101 403 147 8807 Electrolytic, 1mfd, 1
± 20%, 50V.
C13 403 147 8609 Electrolytic, 47mfd, 1
± 20%, 10V.
C253, 254 403 152 7406 Electrolytic, 47mfd, 2
± 20%, 16V.
C11, 12 403 188 8408 Electrolytic, 470mfd, 2
± 20%, 25V.
RESISTORS.
R101, 107 401 012 5609 Carbon, 1K ohms 8
114,123~127 ± 5%, 1/4W.
R15, 102 401 012 6903 Carbon, 10K ohms 5
108,109,116 ± 5%, 1/4W.
R128 ~130 401 012 8006 Carbon, 100K ohms 3
± 5%, 1/4W.
R16, 17 401 013 5202 Carbon, 1.2K ohms 2
± 5%, 1/4W.
R56, 58 401 013 6308 Carbon, 12K ohms 2
± 5%, 1/4W.
R259, 260 401 014 5102 Carbon, 15K ohms 2
± 5%, 1/4W.
CONTROL CIRCUIT BOARDCONTROL CIRCUIT BOARD
CONTROL CIRCUIT BOARDCONTROL CIRCUIT BOARD
CONTROL CIRCUIT BOARD
(Part No. 617 223 4816617 223 4816
617 223 4816617 223 4816
617 223 4816)

JUNE ‘99. 1200 LT Printed in Singapore
For Parts or Service ContactFor Parts or Service Contact
For Parts or Service ContactFor Parts or Service Contact
For Parts or Service Contact
SANYO FISHER SERSANYO FISHER SER
SANYO FISHER SERSANYO FISHER SER
SANYO FISHER SERVICE COMPVICE COMP
VICE COMPVICE COMP
VICE COMPANYANY
ANYANY
ANY
21605 Plummer Street,
Chatsworth, CA91311 U.S.A.
OVERALL CIRCUIT DIAGRAMOVERALL CIRCUIT DIAGRAM
OVERALL CIRCUIT DIAGRAMOVERALL CIRCUIT DIAGRAM
OVERALL CIRCUIT DIAGRAM
- 3 -

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. SM-860251
SERSER
SERSER
SERVICE MANUALVICE MANUAL
VICE MANUALVICE MANUAL
VICE MANUAL MicrMicr
MicrMicr
Microwave Ovenowave Oven
owave Ovenowave Oven
owave Oven EM-P415WSEM-P415WS
EM-P415WSEM-P415WS
EM-P415WS (U.S.A.)(U.S.A.)
(U.S.A.)(U.S.A.)
(U.S.A.)
PrPr
PrPr
Product Code No.oduct Code No.
oduct Code No.oduct Code No.
oduct Code No. 437 499 00437 499 00
437 499 00437 499 00
437 499 00
File No :File No :
File No :File No :
File No :

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 -

NOTENOTE
NOTENOTE
NOTE : If the Interlock Monitor Circuit operates and at the
same time the Fuse blows with the Door opened,
be sure to replace the Control Circuit Board because
Relay 2 on the Control Circuit Board, the Door Sensing
Switch and the electric circuit related on the
Door Sensing Switch, which act as Secondary
Interlock Switch.
Test Procedures and Troubleshooting.................... 4 ~10
Disassembly Instructions ....................................... 11 ~14
Exploded View and Parts List ................................ 15 ~20
Overall Circuit Diagram .......................................... 21
Adjustment Procedures ................................................... 1
Specifications .................................................................. 2
Power Output Measurement ........................................... 2
Precautions and Repair Service Tips .............................. 2
Circuit Diagram ............................................................... 3
1.1.
1.1.
1.ADJUSTMENT PROCEDURESADJUSTMENT PROCEDURES
ADJUSTMENT PROCEDURESADJUSTMENT PROCEDURES
ADJUSTMENT PROCEDURES
TT
TT
TO AO A
O AO A
O AVOID POSSIBLE EXPOSURE TO MICROWVOID POSSIBLE EXPOSURE TO MICROW
VOID POSSIBLE EXPOSURE TO MICROWVOID POSSIBLE EXPOSURE TO MICROW
VOID POSSIBLE EXPOSURE TO MICROWAA
AA
AVEVE
VEVE
VE
ENERGY LEAKAGE, THE FOLLOWINGENERGY LEAKAGE, THE FOLLOWING
ENERGY LEAKAGE, THE FOLLOWINGENERGY LEAKAGE, THE FOLLOWING
ENERGY LEAKAGE, THE FOLLOWING
ADJUSTMENT OF THE INTERLOCK SWITCHESADJUSTMENT OF THE INTERLOCK SWITCHES
ADJUSTMENT OF THE INTERLOCK SWITCHESADJUSTMENT OF THE INTERLOCK SWITCHES
ADJUSTMENT OF THE INTERLOCK SWITCHES
SHOULD BE MADE ONLSHOULD BE MADE ONL
SHOULD BE MADE ONLSHOULD BE MADE ONL
SHOULD BE MADE ONLY BY AUTHORIZEDY BY AUTHORIZED
Y BY AUTHORIZEDY BY AUTHORIZED
Y BY AUTHORIZED
SERSER
SERSER
SERVICE PERSONNEL.VICE PERSONNEL.
VICE PERSONNEL.VICE PERSONNEL.
VICE PERSONNEL.
The SANYO service center should have the designated
detector to measure the microwave energy leakage
after the repair or adjustment.
NOTENOTE
NOTENOTE
NOTE : Detector to be used at the service center is
NARDA 8100, 8200 or the equivalent.
PRIMARPRIMAR
PRIMARPRIMAR
PRIMARY INTERLOCK SWITCH, INTERLOCKY INTERLOCK SWITCH, INTERLOCK
Y INTERLOCK SWITCH, INTERLOCKY INTERLOCK SWITCH, INTERLOCK
Y INTERLOCK SWITCH, INTERLOCK
MONITOR SWITCH AND DOOR SENSING SWITCHMONITOR SWITCH AND DOOR SENSING SWITCH
MONITOR SWITCH AND DOOR SENSING SWITCHMONITOR SWITCH AND DOOR SENSING SWITCH
MONITOR SWITCH AND DOOR SENSING SWITCH
ADJUSTMENTADJUSTMENT
ADJUSTMENTADJUSTMENT
ADJUSTMENT
(Figure 1)(Figure 1)
(Figure 1)(Figure 1)
(Figure 1)
(1) Loosen 2 screws securing the Lever Stopper.
(2) Adjust the Lever Stopper position so that it is pushed
forward and pull backward until there is about zero
gap between the Latch Lever and the switch body on
the Primary Interlock Switch and at the same time
there is about zero gap between the Door Latch and
the switch body on the Door Sensing Switch when
the Door Latch is securely locked.
(3) Tighten the Lever Stopper screws securely.
(4) Make sure the Interlock Monitor Switch closes after
the Primary Interlock Switch opens when the Door
is opened very slowly, according to “CHECKOUT
PROCEDURE FOR SWITCHES” on page 6.
(5) Make sure the Interlock Monitor Switch opens before
the Primary Interlock Switch closes when the Door is
closed very slowly, according to “CHECKOUT
PROCEDURE FOR SWITCHES” on page 6.
(6) Make sure the microwave energy leakage should be
no greater than 4mW/cm2to allow for measurement
uncertainty when measured with a detector.
(All service adjustments must be made for
minimum microwave energy leakage readings.)
- TABLE OF CONTENTS -
Lever Stopper
Door
Sensing
Switch
Door
Latch
Interlock
Monitor
Switch
Primary
Interlock
Switch
Screws
Latch
Lever
Figure 1Figure 1
Figure 1Figure 1
Figure 1
- 1 -

2.2.
2.2.
2. SPECIFICASPECIFICA
SPECIFICASPECIFICA
SPECIFICATIONSTIONS
TIONSTIONS
TIONS
Rated Power Consumption .. 1650W.
Microwave Output ................ 1100W.
Frequency ............................. 2,450MHz±50MHz.
Power Supply ........................ 120V±12V, 60Hz.
Rated Current ....................... 14 Amp.
Safety Devices ..................... Thermal Fuse open at
332°F (167°C) for Cavity.
Thermal Protector open at
275°F (135°C) for Magnetron.
Fuse (Cartridge Type 20A)
Primary Interlock Switch,
Door Sensing Switch and
Relay 2.
Interlock Monitor Switch.
Timer ..................................... Electronic Digital, up to
99 min. 99 sec.
Overall Dimensions ................ 205/8”(W) x 161/2”(D) x 113/8”(H)
Oven Cavity Size .................. 133/4”(W) x 145/8”(D) x 81/4”(H)
Turn Table Diameter.............. 107/8”
Effective Capacity of
Oven Cavity .......................... 1.1 Cubic Feet.
Net Weight ........................... Approx. 34.1 Lbs.
3.3.
3.3.
3. POWER OUTPUT MEASUREMENTPOWER OUTPUT MEASUREMENT
POWER OUTPUT MEASUREMENTPOWER OUTPUT MEASUREMENT
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.
(1) Fill two beakers (glass or plastic) with each one liter of
tap water (about 20°C) and measure the water temperature.
(Use a thermometer with a 1/10 degree gauge).
(2) Place the beakers side by side in the center of the glass tray.
(3) Close the door, set the “TIME” for two minutes. (“200” in
the display window). Touch the “START” key and heat
the water exactly for two minutes.
(4) Take the beakers out, immediately stir the water and
measure the water temperature respectively.
(5) Calculate the temperature rise of water in each beaker.
Then calculate the average value of two temperature rises.
Output power can be calculated by the equation :
Power Output (W) = 70 x ∆t
Where ∆t is an average temperature rise in degrees
Centigrade.
(6) Power Output shall be in the following range :
Average Temperature Rise Power Output
Minimum 22.9°F (12.7°C) 889W
Maximum 29.3°F (16.3°C) 1141W
(7) Power Output is affected by the line voltage under load.
For correct Power Output measurement, the line voltage
under load must be 120±1 volts.
4.4.
4.4.
4.PRECAUTIONS AND REPPRECAUTIONS AND REP
PRECAUTIONS AND REPPRECAUTIONS AND REP
PRECAUTIONS AND REPAIR SERAIR SER
AIR SERAIR SER
AIR SERVICE TIPSVICE TIPS
VICE TIPSVICE TIPS
VICE TIPS
PRELIMINARPRELIMINAR
PRELIMINARPRELIMINAR
PRELIMINARYY
YY
Y
A.A.
A.A.
A. SINCE NEARLSINCE NEARL
SINCE NEARLSINCE NEARL
SINCE NEARLY 2,000 VOLY 2,000 VOL
Y 2,000 VOLY 2,000 VOL
Y 2,000 VOLTS EXISTS IN SOME CIR-TS EXISTS IN SOME CIR-
TS EXISTS IN SOME CIR-TS EXISTS IN SOME CIR-
TS EXISTS IN SOME CIR-
CUITS OF THIS MICROWCUITS OF THIS MICROW
CUITS OF THIS MICROWCUITS OF THIS MICROW
CUITS OF THIS MICROWAA
AA
AVE OVEN, REPVE OVEN, REP
VE OVEN, REPVE OVEN, REP
VE OVEN, REPAIRS SHOULDAIRS SHOULD
AIRS SHOULDAIRS SHOULD
AIRS SHOULD
BE CARRIED OUT WITH GREABE CARRIED OUT WITH GREA
BE CARRIED OUT WITH GREABE CARRIED OUT WITH GREA
BE CARRIED OUT WITH GREAT CARE.T CARE.
T CARE.T CARE.
T CARE.
B.B.
B.B.
B. TO ATO A
TO ATO A
TO AVOID POSSIBLE EXPOSURE TO MICROWVOID POSSIBLE EXPOSURE TO MICROW
VOID POSSIBLE EXPOSURE TO MICROWVOID POSSIBLE EXPOSURE TO MICROW
VOID POSSIBLE EXPOSURE TO MICROWAA
AA
AVEVE
VEVE
VE
ENERGY LEAKAGE, THE FOLLOWING PRECAUTIONSENERGY LEAKAGE, THE FOLLOWING PRECAUTIONS
ENERGY LEAKAGE, THE FOLLOWING PRECAUTIONSENERGY LEAKAGE, THE FOLLOWING PRECAUTIONS
ENERGY LEAKAGE, THE FOLLOWING PRECAUTIONS
MUST BE TMUST BE T
MUST BE TMUST BE T
MUST BE TAKEN BEFORE SERAKEN BEFORE SER
AKEN BEFORE SERAKEN BEFORE SER
AKEN BEFORE SERVICING.VICING.
VICING.VICING.
VICING.
(1) Before the power is applied :
(a) Open and close door several times to make sure the
primary 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. (See pages 1 and 6).
(b) Make sure the perforated screen and the choke die-
lectric of the door are correctly mounted.
(2) After the power is applied :
(a) Open and close the door to see if the interlock mech-
anism operates properly.
(b) Check microwave energy leakage with a leakage
detector and confirm the energy leakage should be
no greater than 4mW/cm2to allow for measurement
uncertainty.
(3) Do not operate the unit until it is completely repaired,
if any of the following conditions exists :
(a) Door does not close firmly against the cavity front.
(b) The hinge is broken.
(c) The choke dielectric or the door seal is damaged.
(d) The door is bent or warped, or there is any other
visible damage to the oven that may cause microwave
energy leakage.
NOTE :
Always keep the seal clean.Always keep the seal clean.
Always keep the seal clean.Always keep the seal clean.
Always keep the seal clean.
(e) Make sure that there are no defective parts in the
interlock mechanism.
(f) Make sure there are no defective parts in the
microwave generating and transmission assembly.
(especially waveguide).
(4) The following items should be checked after the unit
is repaired :
(a) The interlock monitor switch is connected correctly
and firmly.
(b) The magnetron gasket on the magnetron is properly
positioned.
(c) Waveguide and oven cavity are intact (no leakage of
microwave energy).
(d) The door can be properly closed and the safety
switches work properly.
(e) The oven must be stopped when the door is opened
or the time is up.
The oven must not be operated with any of the aboveThe oven must not be operated with any of the above
The oven must not be operated with any of the aboveThe oven must not be operated with any of the above
The oven must not be operated with any of the above
components rcomponents r
components rcomponents r
components removed or bypassed.emoved or bypassed.
emoved or bypassed.emoved or bypassed.
emoved or bypassed.
- 2 -

- 3 -
5. CIRCUIT DIAGRAM
KCOLRETNIYRADNOCES
EDAMHCTIWS
•
YRAMIRP
KCOLRETNI
HCTIWS
KCOLRETNI
ROTINOM
HCTIWS
ROOD
GNISNES
HCTIWS
2YALER
DNOCTINOI MOCMOCMOCMOC
ONCNONON
NEPOROOD
•
ESOLCROOD
•••

A.A.
A.A.
A. TEST PROCEDURESTEST PROCEDURES
TEST PROCEDURESTEST PROCEDURES
TEST PROCEDURES
COMPONENTCOMPONENT
COMPONENTCOMPONENT
COMPONENT CHECKOUT PROCEDURECHECKOUT PROCEDURE
CHECKOUT PROCEDURECHECKOUT PROCEDURE
CHECKOUT PROCEDURE RESULRESUL
RESULRESUL
RESULTT
TT
T
1) Check for resistance : Across the filament Normalreading :
terminals of the Magnetron with an Ohm-Meter Less than 1 Ohm.
on R x 1 scale.
2) Check for resistance : Between each filament Normalreading :
terminal of the Magnetron and the chassis Infinite Ohms.
ground with an Ohm-Meter on highest scale.
1) Measure the resistance : Normal readings :
With an Ohm-Meter on R x 1 scale.
a. Primary winding : Approximately 0.31 Ohms.
b. Filament winding : Less than 1 Ohm.
c. Secondary winding : Approximately 67.5 Ohms.
2) Measure the resistance : Normal readings :
With an Ohm-Meter on highest scale.
a. Primary winding to ground. Infinite Ohms.
b Filament winding to ground. Infinite Ohms.
NoteNote
NoteNote
Note : Remove varnish of
measured point.
Filament Windings
Primary
Windings
Secondary
Windings
6. TEST PROCEDURES AND TROUBLESHOOTING6. TEST PROCEDURES AND TROUBLESHOOTING
6. TEST PROCEDURES AND TROUBLESHOOTING6. TEST PROCEDURES AND TROUBLESHOOTING
6. TEST PROCEDURES AND TROUBLESHOOTING
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION
- DISCONNECT THE POWER SUPPL- DISCONNECT THE POWER SUPPL
- DISCONNECT THE POWER SUPPL- DISCONNECT THE POWER SUPPL
- DISCONNECT THE POWER SUPPLY CORD FROMY CORD FROM
Y CORD FROMY CORD FROM
Y CORD FROM
THE WTHE W
THE WTHE W
THE WALL OUTLET WHENEVER REMOVING THEALL OUTLET WHENEVER REMOVING THE
ALL OUTLET WHENEVER REMOVING THEALL OUTLET WHENEVER REMOVING THE
ALL OUTLET WHENEVER REMOVING THE
CABINET FROM THE UNITCABINET FROM THE UNIT
CABINET FROM THE UNITCABINET FROM THE UNIT
CABINET FROM THE UNIT, PROCEED WITH THE, PROCEED WITH THE
, PROCEED WITH THE, PROCEED WITH THE
, PROCEED WITH THE
TESTS ONLTESTS ONL
TESTS ONLTESTS ONL
TESTS ONLY AFTER DISCHARGING THE HIGHY AFTER DISCHARGING THE HIGH
Y AFTER DISCHARGING THE HIGHY AFTER DISCHARGING THE HIGH
Y AFTER DISCHARGING THE HIGH
VOLVOL
VOLVOL
VOLTT
TT
TAGE CAPAGE CAP
AGE CAPAGE CAP
AGE CAPACITOR AND REMOVING THE LEADACITOR AND REMOVING THE LEAD
ACITOR AND REMOVING THE LEADACITOR AND REMOVING THE LEAD
ACITOR AND REMOVING THE LEAD
WIRES FROM THE PRIMARWIRES FROM THE PRIMAR
WIRES FROM THE PRIMARWIRES FROM THE PRIMAR
WIRES FROM THE PRIMARY WINDING OF THEY WINDING OF THE
Y WINDING OF THEY WINDING OF THE
Y WINDING OF THE
HIGH VOLHIGH VOL
HIGH VOLHIGH VOL
HIGH VOLTT
TT
TAGE TRANSFORMER. (SEE FIGURE 3)AGE TRANSFORMER. (SEE FIGURE 3)
AGE TRANSFORMER. (SEE FIGURE 3)AGE TRANSFORMER. (SEE FIGURE 3)
AGE TRANSFORMER. (SEE FIGURE 3)
Figure 3Figure 3
Figure 3Figure 3
Figure 3
Figure 4Figure 4
Figure 4Figure 4
Figure 4
Figure 5Figure 5
Figure 5Figure 5
Figure 5
Figure 6Figure 6
Figure 6Figure 6
Figure 6
Ohm-MeterOhm-Meter
Ohm-MeterOhm-Meter
Ohm-Meter
Ohm-MeterOhm-Meter
Ohm-MeterOhm-Meter
Ohm-Meter
Ohm-meterOhm-meter
Ohm-meterOhm-meter
Ohm-meter
- 4 -
HIGH-VOLTAGE
TRANSFORMER
MAGNETRON

COMPONENTCOMPONENT
COMPONENTCOMPONENT
COMPONENT CHECKOUT PROCEDURECHECKOUT PROCEDURE
CHECKOUT PROCEDURECHECKOUT PROCEDURE
CHECKOUT PROCEDURE RESULRESUL
RESULRESUL
RESULTT
TT
T
Measure the resistance : Across two terminals Normal reading :
with an Ohm-Meter on highest scale. Momentarily indicates several ohms,
and gradually returns to 10 Meg-Ohms.
Abnormal reading :
Indicates continuity or 10 Meg-Ohms
from the beginning.
Measure the resistance : Across two terminals Normal reading :
with an Ohm-Meter on R x 10,000 scale. Indicates about the middle position in
one direction (forward direction) and
infinite Ohms in the reverse direction,
using meter which is provided with a
9 volt battery.
NOTENOTE
NOTENOTE
NOTE
- Some digital meter may show over
even in a forward direction because
low measuring voltage of meter does
not allow the meter current to pass
through the High Voltage Diode.
Abnormal reading :
Indicates continuity or infinite Ohms
in both directions.
Measure the voltage : Between test point TP-1,
TP-2 , TP-3 or TP-4 and Ground between TP-5
and TP-6 (See Control Circuit Board on page 19).
NOTENOTE
NOTENOTE
NOTE
- Proceed with the check of the Step-Down
Transformer, to see if any one of the measured
values is different from the specified values.
Figure 8Figure 8
Figure 8Figure 8
Figure 8
Ohm-MeterOhm-Meter
Ohm-MeterOhm-Meter
Ohm-Meter
Figure 7Figure 7
Figure 7Figure 7
Figure 7
Ohm-MeterOhm-Meter
Ohm-MeterOhm-Meter
Ohm-Meter
- 5 -
Test TP-5 /
Point TP-1 TP-2 TP-3 TP-4 TP-6
Voltage -5V -15V -25V -36V 2.0V
DC DC DC DC AC
HIGH-VOLTAGE
DIODE
HIGH-VOLTAGE
CAPACITOR
including
BLEEDER
RESISTOR
CONTROL
CIRCUIT
BOARD

CHECKOUT PROCEDURE FOR SWITCHESCHECKOUT PROCEDURE FOR SWITCHES
CHECKOUT PROCEDURE FOR SWITCHESCHECKOUT PROCEDURE FOR SWITCHES
CHECKOUT PROCEDURE FOR SWITCHES
Disconnect the lead wires from the switches and check for the continuity of the switches, connecting an Ohm-Meter
to its terminals.
SWITCHESSWITCHES
SWITCHESSWITCHES
SWITCHES CHECKOUT PROCEDURESCHECKOUT PROCEDURES
CHECKOUT PROCEDURESCHECKOUT PROCEDURES
CHECKOUT PROCEDURES DOOR OPENDOOR OPEN
DOOR OPENDOOR OPEN
DOOR OPEN DOOR CLOSEDDOOR CLOSED
DOOR CLOSEDDOOR CLOSED
DOOR CLOSED
(See Figure 1 on page 1)(See Figure 1 on page 1)
(See Figure 1 on page 1)(See Figure 1 on page 1)
(See Figure 1 on page 1)
Primary Interlock
Terminals “COM” and “NO”
Door Sensing
Interlock Monitor Terminals “COM” and “NC”
COMPONENTCOMPONENT
COMPONENTCOMPONENT
COMPONENT CHECKOUT PROCEDURECHECKOUT PROCEDURE
CHECKOUT PROCEDURECHECKOUT PROCEDURE
CHECKOUT PROCEDURE RESULRESUL
RESULRESUL
RESULTT
TT
T
Measure the resistance between terminals of
FPC connector after removing it from S101.
(Figure 9).
NOTENOTE
NOTENOTE
NOTE
- When reconnecting the FPC connector, make When checking “START” key, connect
sure the holes on the connector are properly Ohm-Meter as illustration below.
inserted in hooks of the plastic fastener in S101.
TOUCH KEY
BOARD
MAMA
MAMA
MATRIX CIRCUIT FORTRIX CIRCUIT FOR
TRIX CIRCUIT FORTRIX CIRCUIT FOR
TRIX CIRCUIT FOR
TOUCH KEY BOARDTOUCH KEY BOARD
TOUCH KEY BOARDTOUCH KEY BOARD
TOUCH KEY BOARD
FPC CONNECTORFPC CONNECTOR
FPC CONNECTORFPC CONNECTOR
FPC CONNECTOR
Figure 9Figure 9
Figure 9Figure 9
Figure 9
Ohm-MeterOhm-Meter
Ohm-MeterOhm-Meter
Ohm-Meter
- 6 -
TERMINALS OF FPC CONNECTORTERMINALS OF FPC CONNECTOR
TERMINALS OF FPC CONNECTORTERMINALS OF FPC CONNECTOR
TERMINALS OF FPC CONNECTOR
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION : After checking the switches, make sure that the Interlock Monitor Switch is properly connected according
to the CIRCUIT DIAGRAM on page 3.
065
1
2
3
4
7
8
9
STOP /
CLEAR FRESH
VEGETABLE
POWER
LEVEL SOUP /
BEVERAGE MORE +
LESS -
TOTAL
DEFROST QUICK
ON
CLOCK POPCORN
PIZZA START FROZEN
VEGETABLE
CUSTOM
PROGRAMS
ADD
30 SEC
KITCHEN
TIMER
FROZEN
ENTREE
QUICK
DEFROST
POTATO
When When not
Resistance touched touched
value Less than More than
1K Ohms 1 MEG Ohms

- 7 -
STEPSTEP STEPSTEP
STEP SEQUENCESEQUENCE
SEQUENCESEQUENCE
SEQUENCE
B. TROUBLESHOOTINGB. TROUBLESHOOTING B. TROUBLESHOOTINGB. TROUBLESHOOTING
B. TROUBLESHOOTING
0 Volt. Check continuity of Fuse,
Thermal Protector for Magnetron, Thermal Protector for Cavity and AC Power Cord. If the Fuse is blown, see “E, REMOVING FUSE”on page 13.
Replace it
if necessary.
Normal Control
Circuit Board.
Correct seating of
Connector S101 or
replace Control
Circuit Board.
Each resistance
OK.
Resistance
incorrect.
(ON or OFF)
Replace Touch
Key Board.
Normal Touch
Key Board.
Normal Control
Circuit Board.
Replace Control
Circuit Board.
Voltage
incorrect.
Check power supply voltage on Control Circuit Board. (See page 5)
Each voltage
OK.
Touch Key Board.
Check resistance of
Touch Key Board.
(See page 6)
120 Volts.
Check 120VAC power supply of Connector S1 between Pin 1 and Pin 3 after removing Connector S1 from Control Circuit Board.
(1) PROBLEM No display or mis-display in the display window by touching the keys.
a b
RESULRESUL RESULRESUL
RESULTT
TT
T
PROBLEM 1-b
Runs Runs Runs Runs
Control Circuit
Board.

Touch “START”key and measure voltage between white wire lead and black wire lead for primary winding of H.V. Transformer after removing the wire leads from terminals of H.V. Transformer.
STEPSTEP STEPSTEP
STEP SEQUENCESEQUENCE
SEQUENCESEQUENCE
SEQUENCE RESULRESUL
RESULRESUL
RESULTT
TT
T
Continuity
OK.
Check contact of Connector S102.
PROBLEM 3-b
Replace Control
Circuit Board.
Normal Control
Circuit Board.
AC 120 Volts.
No
continuity.
Runs Runs
Check continuity of Connector S102 between Pins (O and BL) with the door closed after removing Connector S102 from Control Circuit Board.
(2) PROBLEM Cooking operation will not start.
Door Sensing Switch.
Poor
contact.
Contact
OK.
Correct seating.
Normal
contact.
Adjust or replace Door Sensing Switch. (See page 1)
PROBLEM 3-a
Runs
CHECK : 1. Power Supply to Oven.
2. Primary Interlock Switch. 3 . Thermal Protector for Magnetron and
Thermal Protector for Cavity.
(3) PROBLEM Oven does not heat up.
Normal Door
Sensing Switch.
- 8 -
a
a
0 Volts.

STEPSTEP STEPSTEP
STEP SEQUENCESEQUENCE
SEQUENCESEQUENCE
SEQUENCE
Resistance
OK.
Check H.V. Capacitor or H.V. Diode with an ohm-meter after removing lead wires. (See page 5)
Normal
resistance
No
operation.
Check operation of Blower Motor when “START”key
is touched.
Normal
operation.
Check resistance of each winding after removing lead wires. (See page 4)
H.V. Transformer.
Resistance
incorrect.
Normal H.V. Capacitor or H.V. Diode.
Replace H.V. Transformer.
Normal H.V. Transformer.
(4) PROBLEM Low microwave power output.
b
a
Replace
Magnetron.
Normal
Magnetron.
Defective
H.V. Capacitor
or H.V. Diode.
Replace H.V.
Capacitor or
H.V. Diode.
Normal H.V. Capacitor or H.V. Diode.
Replace Thermal Protector for Magnetron or Thermal Protector for Cavity.
Normal Thermal Protector for Magnetron or Thermal Protector for Cavity.
Temporarily short across terminals of Thermal Protector for Magnetron or Thermal Protector for Cavity by using jumper lead.
No
operation. Measure resistance
of Blower Motor
Approx. 63 ohms.
Replace Control Circuit Board.
Normal Control
Circuit Board.
Resistance incorrect. Replace
Blower Motor.
Normal Blower
Motor.
PROBLEM 3-b
Runs Runs Runs Runs Runs Runs
RESULRESUL RESULRESUL
RESULTT
TT
T
- 9 -
Normal
operation.

STEPSTEP STEPSTEP
STEP SEQUENCESEQUENCE
SEQUENCESEQUENCE
SEQUENCE RESULRESUL
RESULRESUL
RESULTT
TT
T
Set power level
at “50”.
(5) PROBLEM The Magnetron operates on high level when a lower cook power is selected.
H.V. Transformer.
Touch “START”key and
measure voltage between white wire lead and black wire lead for primary winding of H.V. Transformer after removing the wire leads from terminals of H.V. Transformer.
Runs
(6) PROBLEM No buzzing by touching keys and at the end of cooking.
120V Replace Control
Circuit Board
Normal Control Circuit Board
Runs
Check normal operation of Control Circuit Board.
Replace Control
Circuit Board
Normal Control
Circuit Board
Voltage cycles
on and off.
a
a
- 10 -
No problem. Measurewater temperature rise exactly.

B.B.
B.B.
B. REMOVING PRIMARREMOVING PRIMAR
REMOVING PRIMARREMOVING PRIMAR
REMOVING PRIMARY INTERLOCK SWITCH ANDY INTERLOCK SWITCH AND
Y INTERLOCK SWITCH ANDY INTERLOCK SWITCH AND
Y INTERLOCK SWITCH AND
INTERLOCK MONITOR SWITCHINTERLOCK MONITOR SWITCH
INTERLOCK MONITOR SWITCHINTERLOCK MONITOR SWITCH
INTERLOCK MONITOR SWITCH
(Figure 10-b)
(1) Disconnect all wire leads from Primary Interlock and
Interlock Monitor Switch.
(2) Pull the Primary Interlock Switch or Interlock Monitor
Switch upward at the same time while pushing the
Switch Stoppers to allow a space between the
switch body and catches.
(3) Make necessary adjustments or replacement of
switch by the reversing step (2) and check micro-
wave energy leakage according to “1. ADJUSTMENT
PROCEDURES”on page 1, after it is replaced with
new one, and check proper operation of it according
to “CHECKOUT PROCEDURE FOR SWITCHES”on
page 6.
Interlock Switch Replacement - when replacing
faulty switches, be sure switch mounting tabs are
not bent, broken or otherwise deficient in their
ability to secure the switches in place.
7.7.
7.7.
7.DISASSEMBLDISASSEMBL
DISASSEMBLDISASSEMBL
DISASSEMBLY INSTRUCTIONSY INSTRUCTIONS
Y INSTRUCTIONSY INSTRUCTIONS
Y INSTRUCTIONS
••
••
•OVEN MUST BE DISCONNECTED FROM ELECTRICALOVEN MUST BE DISCONNECTED FROM ELECTRICAL
OVEN MUST BE DISCONNECTED FROM ELECTRICALOVEN MUST BE DISCONNECTED FROM ELECTRICAL
OVEN MUST BE DISCONNECTED FROM ELECTRICAL
OUTLET WHEN MAKING REPLACEMENTS, REPOUTLET WHEN MAKING REPLACEMENTS, REP
OUTLET WHEN MAKING REPLACEMENTS, REPOUTLET WHEN MAKING REPLACEMENTS, REP
OUTLET WHEN MAKING REPLACEMENTS, REPAIRS,AIRS,
AIRS,AIRS,
AIRS,
ADJUSTMENTS ANDADJUSTMENTS AND
ADJUSTMENTS ANDADJUSTMENTS AND
ADJUSTMENTS AND CONTINUITY CHECKS BEFORECONTINUITY CHECKS BEFORE
CONTINUITY CHECKS BEFORECONTINUITY CHECKS BEFORE
CONTINUITY CHECKS BEFORE
PROCEEDING WITH ANY REPPROCEEDING WITH ANY REP
PROCEEDING WITH ANY REPPROCEEDING WITH ANY REP
PROCEEDING WITH ANY REPAIR WORK. AFTERAIR WORK. AFTER
AIR WORK. AFTERAIR WORK. AFTER
AIR WORK. AFTER
DISCONNECTING, WDISCONNECTING, W
DISCONNECTING, WDISCONNECTING, W
DISCONNECTING, WAIT AAIT A
AIT AAIT A
AIT AT LEAST 1 MINUTE, UNTILT LEAST 1 MINUTE, UNTIL
T LEAST 1 MINUTE, UNTILT LEAST 1 MINUTE, UNTIL
T LEAST 1 MINUTE, UNTIL
THE CAPTHE CAP
THE CAPTHE CAP
THE CAPACITOR IN THE HIGH-VOLACITOR IN THE HIGH-VOL
ACITOR IN THE HIGH-VOLACITOR IN THE HIGH-VOL
ACITOR IN THE HIGH-VOLTT
TT
TAGE AREAAGE AREA
AGE AREAAGE AREA
AGE AREA
HAS FULLHAS FULL
HAS FULLHAS FULL
HAS FULLY DISCHARGED.Y DISCHARGED.
Y DISCHARGED.Y DISCHARGED.
Y DISCHARGED.
••
••
•WHEN REPLACING ANY DOOR MICROSWITCH,WHEN REPLACING ANY DOOR MICROSWITCH,
WHEN REPLACING ANY DOOR MICROSWITCH,WHEN REPLACING ANY DOOR MICROSWITCH,
WHEN REPLACING ANY DOOR MICROSWITCH,
REPLACE WITH THE SAME TYPE SWITCH SPECIFIEDREPLACE WITH THE SAME TYPE SWITCH SPECIFIED
REPLACE WITH THE SAME TYPE SWITCH SPECIFIEDREPLACE WITH THE SAME TYPE SWITCH SPECIFIED
REPLACE WITH THE SAME TYPE SWITCH SPECIFIED
ON THE PON THE P
ON THE PON THE P
ON THE PARAR
ARAR
ARTS LISTTS LIST
TS LISTTS LIST
TS LIST..
..
.
A.A.
A.A.
A. REMOVING DOOR SENSING SWITCHREMOVING DOOR SENSING SWITCH
REMOVING DOOR SENSING SWITCHREMOVING DOOR SENSING SWITCH
REMOVING DOOR SENSING SWITCH
(Figures 1 on page 1, 10-a)
(1) Disconnect all wire leads from the Door Sensing
Switch. (Figure 1 on page 1)
(2) Remove 2 screws securing the Lever Stopper.
(3) Push the Door Sensing Switch upward while pressing
adjacent Upper Switch Stopper of Lever Stopper and
Lower Switch Stopper down (Figure 10-a).
(4) Then remove it by lightly pressing the switch toward
you (Figure 10-a).
(5) Make necessary adjustments or replacements of the
Door Sensing Switch by reversing step (3) and check
microwave energy leakage according to “1.
ADJUSTMENT PROCEDURES”on page 1, after it is
replaced with new one, and check proper operation
of it according to “CHECKOUT PROCEDURE FOR
SWITCHES”on page 6.
- 11 -
Door
Sensing
Switch
Upper
Switch
Stopper
Lower
Switch
Stopper
Figure 10-aFigure 10-a
Figure 10-aFigure 10-a
Figure 10-a
Primary
Interlock
Switch
Interlock
Monitor
Switch
Switch Stoppers
Figure 10-bFigure 10-b
Figure 10-bFigure 10-b
Figure 10-b
Switch Stoppers

C.C.
C.C.
C. REMOVING BLOWER MOTORREMOVING BLOWER MOTOR
REMOVING BLOWER MOTORREMOVING BLOWER MOTOR
REMOVING BLOWER MOTOR
(Figures 11 (Top View) and 12).
(1) Remove screw securing the stay.
(2) Disconnect all lead wires from the Blower Motor
and H.V. Capacitor.
(3) Remove 2 screws securing the Blower Base and
disengage 3 hooks from the Rear Plate of Cavity
(Figure 12).
(4) Remove 1 screw securing the Blower Motor with
the Blower Base.
D.D.
D.D.
D. REMOVING MAGNETRONREMOVING MAGNETRON
REMOVING MAGNETRONREMOVING MAGNETRON
REMOVING MAGNETRON
(Figure 11 (Top View))
After removing the Blower Motor :
(1) Remove Duct (mag. exhaust). Remove the screw
securing the stay.
(2) Remove 1 screw securing the Thermal Protector.
(3) Disconnect 2 lead wires from the Magnetron.
(4) Remove 4 screws securing the Magnetron to the
Waveguide.
(5) Take out Magnetron VERY CAREFULLY.
NOTENOTE
NOTENOTE
NOTE
1. When removing the Magnetron from the Cavity or
Wave Guide, use a proper care so that the dome of
the Magnetron does not hit any adjacent parts of
microwave oven.
2. Make sure that the contact face of the Magnetron
Gasket is free from any damage or deformation.
3. Adjust the position of the Magnetron properly, so
that it correctly sits in place and the Magnetron
Gasket is in contact with the mounting rim evenly.
4. While holding the Magnetron under this condition,
tighten mounting screws or nuts with your fingers
temporarily.
5. Further tighten the screws or nuts with a box
wrench, giving one or two turns to each of the
screws (or nuts) alternatively so that the
Magnetron is mounted on to the bracket uniformly.
6. After replacing the Magnetron, be sure to check the
microwave energy leakage with a leakage detector
and confirm the leakage is below 4mW/cm2.
- 12 -
Duct (mag. exhaust)
Thermal Protector
Blower Base
Screw
Duct (mag. intake)
Stay
FigurFigur
FigurFigur
Figure 11 (Te 11 (T
e 11 (Te 11 (T
e 11 (Top Vop V
op Vop V
op View)iew)
iew)iew)
iew)
Figure 12Figure 12
Figure 12Figure 12
Figure 12
Hooks
Blower Motor
Screws

E.E.
E.E.
E. REMOVING FUSEREMOVING FUSE
REMOVING FUSEREMOVING FUSE
REMOVING FUSE
Remove the 20A Fuse with a screwdriver.
NOTENOTE
NOTENOTE
NOTE
-- When replacing the 20A Fuse, be sure to use an exact
repair part.
-- If the 20A Fuse blows immediately, check the Primary
Interlock Switch, the Relay 2 (on the Control Circuit Board)
and the Interlock Monitor Switch according to,
“CHECKOUT PROCEDURE“CHECKOUT PROCEDURE
“CHECKOUT PROCEDURE“CHECKOUT PROCEDURE
“CHECKOUT PROCEDURE FOR SWITCHES”FOR SWITCHES”
FOR SWITCHES”FOR SWITCHES”
FOR SWITCHES” on page 6.
And make sure to check the microwave energy leakage
according to, “1. ADJUSTMENT“1. ADJUSTMENT
“1. ADJUSTMENT“1. ADJUSTMENT
“1. ADJUSTMENT PROCEDURES”PROCEDURES”
PROCEDURES”PROCEDURES”
PROCEDURES” on page
1, when the Primary Interlock Switch, the Relay 2 or the
Interlock Monitor Switch is adjusted or replaced.
-- If the Primary Interlock Switch, the Relay 2 and the Interlock
Monitor Switch operate properly, determine which of the
following is defective : Control Circuit Board, Blower Motor,
High Voltage Transformer, High Voltage Capacitor, High
Voltage Diode or Magnetron.
FF
FF
F..
..
.REMOVING CONTROL CIRCUIT BOARDREMOVING CONTROL CIRCUIT BOARD
REMOVING CONTROL CIRCUIT BOARDREMOVING CONTROL CIRCUIT BOARD
REMOVING CONTROL CIRCUIT BOARD
(See exploded view on page 18 and Figure 13)
(1) Remove the Connector S1, S102 and the Connector for
the Relay 2 from the Control Circuit Board.
(2) Remove 1 screw securing the Control Panel complete to
the Oven Cavity.
(3) Remove the FPC Connector from the Connector S101
while grasping up both lever ends of the plastic fastener.
(4) Remove 2 screws securing the Control Circuit Board to
the Control Base.
(5) Lift up the Control Circuit Board from its lower side and
take it out from the Control Base.
G.G.
G.G.
G. REMOVING TOUCH KEY BOARDREMOVING TOUCH KEY BOARD
REMOVING TOUCH KEY BOARDREMOVING TOUCH KEY BOARD
REMOVING TOUCH KEY BOARD
(Figure 14)
After removing the Control Circuit Board :
(1) Remove control base while lifting it up at the right side
and take it out from the control frame.
(2) Remove Control Sheet which is glued to Touch Key Board.
(3) Remove the Touch Key Board which is held on the Control
Base Bracket with the adhesive tape.
- 13 -
Control Frame
Control Sheet
Touch Key
Board
Figure 14Figure 14
Figure 14Figure 14
Figure 14
Figure 13Figure 13
Figure 13Figure 13
Figure 13
Control Frame
Control Base

J.J.
J.J.
J. REMOVING CAREMOVING CA
REMOVING CAREMOVING CA
REMOVING CAVITY COVERVITY COVER
VITY COVERVITY COVER
VITY COVER
(Figure 16)
(1) Remove a screw from the Cavity compartment.
K.K.
K.K.
K.REMOVING TURNTREMOVING TURNT
REMOVING TURNTREMOVING TURNT
REMOVING TURNTABLE MOTOR COVERABLE MOTOR COVER
ABLE MOTOR COVERABLE MOTOR COVER
ABLE MOTOR COVER
(Figure 17)
(1) Turn over the oven on its back.
(2) Cut the 6-joints of the Bottom Plate using diagonal
pliers (nipper).
(3) Separate the Motor Cover from Bottom Plate.
(4) Remove 2 screws securing Turntable Motor to the
Cavity and take it out.
NoteNote
NoteNote
Note : Bent the cut joints inside slightly for safety
and be careful of sharp edge.
H.H.
H.H.
H.REMOVING DOORREMOVING DOOR
REMOVING DOORREMOVING DOOR
REMOVING DOOR
(1) Remove 2 hex nuts securing the upper hinge.
(2) Tilt the top of the Door toward you.
(3) Lift up the Door to remove it.
NOTENOTE
NOTENOTE
NOTE
- After replacing the Door, be sure to check that the
Primary Interlock Switch, the Door Sensing Switch
and the Interlock Monitor Switch operate normally.
(See page 1).
- After replacing the Door, check for microwave energy
leakage with a leakage detector. Microwave energy
leakage must be below the limit of 4mW/cm2 to
allow for measurement uncertainty.
I.I.
I.I.
I. DISASSEMBLING DOORDISASSEMBLING DOOR
DISASSEMBLING DOORDISASSEMBLING DOOR
DISASSEMBLING DOOR
(Figure 15)
(1) Insert a thin flat-blade screwdriver between the
Choke Dielectric and the Door Main Frame and lift
up the Choke Dielectric to release hooks one by
one. (Figure 15).
(2) Remove the Choke Dielectric.
(3) To detach the Door Cover, insert a thin flat-blade
screwdriver between Door Cover and Door Panel
and release the projections inside Door Cover.
(4) To detach the Door panel, insert a thin flat-blade
screwdriver between the Door Cover and Door
Main Frame.
NOTENOTE
NOTENOTE
NOTE
- The Choke Dielectric may be damaged when
it is removed. When reinstalling it replace it
with new ones if it is damaged.
- After installing the Door in place, check for
microwave energy leakage with a detector.
Microwave energy leakage must be below the
limit of 4mW/cm2to allow for measurement
uncertainty.
- 14 -
Figure 17Figure 17
Figure 17Figure 17
Figure 17
Motor Cover
6 Joints Bottom Plate
Screw
Cavity Cover
Figure 16Figure 16
Figure 16Figure 16
Figure 16
Hooks
Hooks
Hooks
Hooks
Door
Main
Frame
Choke
Dielectric
Figure 15Figure 15
Figure 15Figure 15
Figure 15