File No :
SER
VICE MANUAL
SERVICE
Micr
owave Oven
Microwave
EM-S8000BS
EM-S8000WS (U.S.A.)
Model No : EM-S8000BS
EM-S8000WS
Product Code No : 437 500 00
437 500 01
CAUTION
WARNING TO SER
VICE TECHNICIANS
SERVICE
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-860278
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.
CAUTION
For micr
owave ener
gy emission
microwave
energy
On every service calls, check for microwave energy
emission, must be made according to the following manner.
Measur
ement of ener
gy emission
Measurement
energy
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±5o celsius (68
±9oF) placed within the cavity at the center.
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 manner that
micr
owave ener
gy emission ar
e minimal.
energy
are
microwave
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-
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/cm 2 must 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 properly and the door
interlocks switch fails, the fuse will blow. If this happens,
all interlock switches must be replaced. The contacts of
the interlock switches may be welded together.
- TABLE OF CONTENTS Adjustment Procedures ...................................................
Specifications ..................................................................
Power Output Measurement ...........................................
Precautions and Repair Service Tips ..............................
Circuit Diagram ...............................................................
1
2
2
2
3
1 . ADJUSTMENT PROCEDURES
TO A
VOID POSSIBLE EXPOSURE TO MICROW
AVE
AVOID
MICROWA
ENERGY LEAKAGE, THE FOLLOWING
ADJUSTMENT OF THE INTERLOCK SWITCHES
SHOULD BE MADE ONL
Y BY AUTHORIZED
ONLY
SER
VICE PERSONNEL.
SERVICE
Test Procedures and Troubleshooting ....................
Disassembly Instructions .......................................
Exploded View and Parts List ................................
Overall Circuit Diagram ..........................................
4 ~ 10
11 ~ 14
15 ~ 20
21
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.
The SANYO service center should have the designated
detector to measure the microwave energy leakage
after the repair or adjustment.
Door
Latch
Lever Stopper
NOTE : Detector to be used at the service center is
NARDA 8100, 8200 or the equivalent.
PRIMAR
Y INTERLOCK SWITCH, INTERLOCK
PRIMARY
MONITOR SWITCH AND DOOR SENSING SWITCH
ADJUSTMENT
Door
Sensing
Switch
(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.
Interlock
Monitor
Switch
Screws
(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/cm2 to allow for measurement
uncertainty when measured with a detector.
(All service adjustments must be made for
minimum microwave energy leakage readings.)
Figure 1
-1-
Latch
Lever
Primary
Interlock
Switch
2. SPECIFICA
TIONS
SPECIFICATIONS
4 . PRECAUTIONS AND REP
AIR SER
VICE TIPS
REPAIR
SERVICE
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 332°F
(167oC) for Cavity & Bottom.
Thermal Protector open at
252°F(122oC) for Magnetron.
Thermostat close at 140°F
(60°C) for Hood Fan.
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 ............... 297/8”(W) x 141/8”(D) x 17”(H)
Oven Cavity Size ................... 191/4”(W) x 131/2”(D) x 97/8”(H)
Turn Table Diameter ............... 10 13/16 ”
Effective Capacity of
Oven Cavity ........................... 1.5 Cubic Feet.
Net Weight ............................ Approx. 59.5 Lbs.
3. POWER OUTPUT MEASUREMENT
A. SINCE NEARL
Y 2,000 VOL
TS EXISTS IN SOME CIRNEARLY
VOLTS
CUITS OF THIS MICROW
AVE OVEN, REP
AIRS SHOULD
MICROWA
REPAIRS
BE CARRIED OUT WITH GREA
GREATT CARE.
B. TO A
VOID POSSIBLE EXPOSURE TO MICROW
AVE
AVOID
MICROWA
ENERGY LEAKAGE, THE FOLLOWING PRECAUTIONS
MUST BE TTAKEN
AKEN BEFORE SER
VICING.
SERVICING.
(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 dielectric of the door are correctly mounted.
(2) After the power is applied :
(a) Open and close the door to see if the interlock mechanism operates properly.
(b) Check microwave energy leakage with a leakage
detector and confirm the energy leakage should be
no greater than 4mW/cm2 to allow for measurement
uncertainty.
(3) Do not operate the unit until it is completely repaired,
if any of the following conditions exists :
NOTE
The power output specification, 1000 W. on this model is
measured with IEC measurement. The power output is
measured with two ( 2 ) liters water is equivalent to 1000 W.
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 20oC ) 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.
Average Temperature Rise
23.0 oF(12.8oC)
28.3 oF(15.7oC)
(a)
(b)
(c)
(d)
Door does not close firmly against the cavity front.
The hinge is broken.
The choke dielectric or the door seal is damaged.
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.
(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.
(6) Power output shall be in the following range :
Minimum
Maximum
PRELIMINAR
Y
PRELIMINARY
Power Output
896W
1099W
(7) Power Output is affected by the line voltage under load.
For correct Power Output measurement, the line voltage
under load must be 120±1volts.
-2-
(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
above components rremoved
emoved or bypassed.
5. CIRCUIT DIAGRAM
SECONDARY INTERLOCK
S W ITC H M A D E
CONDITION
•
PRIMARY
INTERLOCK
SWITCH
INTERLOCK
MONITOR
SWITCH
DOOR
SENSING
SWITCH
RELAY 2
COM
COM
COM
COM
NO
NC
NO
NO
•
•
•
DOOR OPEN
DOOR CLOSE
•
-3-
Figure 2
Filament Windings
6. TEST PROCEDURES AND TROUBLESHOOTING
CAUTION
- DISCONNECT THE POWER SUPPL
Y CORD FROM
SUPPLY
THE W
ALL OUTLET WHENEVER REMOVING THE
WALL
CABINET FROM THE UNIT
UNIT,, PROCEED WITH THE
TESTS ONL
Y AFTER DISCHARGING THE HIGH
ONLY
VOL
ACITOR AND REMOVING THE LEAD
VOLTTAGE CAP
CAPACITOR
WIRES FROM THE PRIMAR
Y WINDING OF THE
PRIMARY
HIGH VOL
VOLTTAGE TRANSFORMER. (SEE FIGURE 3)
Secondary
Windings
Primary
Windings
Figure 3
A. TEST PROCEDURES
COMPONENT
CHECKOUT PROCEDURE
RESUL
RESULTT
1) Check for resistance : Across the filament
terminals of the magnetron with an ohm-meter
on R x 1 scale.
Normal reading :
Less than 1 ohm.
Ohm-meter
MAGNETRON
Figure 4
2) Check for resistance : Between each filament
terminal of the magnetron and the chassis
ground with an ohm-meter on highest scale.
Normal reading :
Infinite ohms.
Ohm-meter
Figure 5
HIGH-VOLTAGE
TRANSFORMER
1) Measure the resistance :
With an ohm-meter on R x 1 scale.
a. Primary winding :
b. Filament winding :
c. Secondary winding :
Normal readings :
2) Measure the resistance :
With an ohm-meter on highest scale.
a. Primary winding to ground.
b Filament winding to ground.
Normal readings :
Approximately 0.337 ohms.
Less than 1 ohm.
Approximately 66.86 ohms.
Ohm-meter
Figure 6
Note : Remove varnish of
measured point.
-4-
Infinite ohms.
Infinite ohms.
COMPONENT
CHECKOUT PROCEDURE
RESUL
RESULTT
Measure the resistance : Across two terminals
with an ohm-meter on highest scale.
HIGH-VOLTAGE
CAPACITOR
including
BLEEDER
RESISTOR
Normal reading :
Momentarily indicates several ohms,
and gradually returns to 10 meg-ohms.
Abnormal reading :
Indicates continuity or 10 meg-ohms
from the beginning.
Ohm-meter
Figure 7
Measure the resistance : Across two terminals
with an ohm-meter on R x 10,000 scale.
Ohm-meter
Normal reading :
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.
NOTE
HIGH-VOLTAGE
DIODE
- 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.
Figure 8
CONTROL
CIRCUIT
BOARD
Measure the voltage : Between test point TP-1,
TP-2, TP-3, TP-4 or TP-5 and Ground between
TP-6 and TP-7 (See Control Circuit Board on
page 19).
Test
Point
TP-1
TP-2
TP-3
Voltage
-5V
DC
-15V
DC
-25V
DC
NOTE
Test
Point
TP-4
TP-5
- Proceed with the check of the Step-Down
Transformer, to see if any one of the measured
values is different from the specified values.
Voltage
-27V
DC
-31V
DC
TP-6/
TP-7
2.0V
AC
-5-
COMPONENT
CHECKOUT PROCEDURE
Measure the resistance between terminals of
FPC connector after removing it from S101.
(Figure 9).
TOUCH KEY
BOARD
NOTE
- When reconnecting the FPC connector, make
sure the holes on the connector are properly
inserted in hooks of the plastic fastener in S101.
MA
TRIX CIRCUIT FOR
MATRIX
TOUCH KEY BOARD
FPC CONNECTOR
RESUL
RESULTT
Resistance
value
When
touched
When not
touched
Less than
1K Ohms
More than
1 MEG Ohms
When checking “START” key, connect
ohm-meter as illustration below.
Ohm-meter
TERMINALS OF FPC CONNECTOR
Figure 9
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.
SWITCHES
(See Figure 1 on page 1)
CHECKOUT PROCEDURES
DOOR OPEN
DOOR CLOSED
Primary Interlock
Terminals “COM” and “NO”
Door Sensing
Interlock Monitor
CAUTION
:
Terminals “COM” and “NC”
After checking the switches, make sure that the interlock monitor switch is properly connected according
to the CIRCUIT DIAGRAM on page 3.
-6-
-7-
Control Circuit
Board.
Check power supply
voltage on Control Circuit
Board. (See page 5)
b
Check 120VAC power supply
of Connector S1 between Pin
1 and Pin 3 after removing
Connector S1 from Control
Circuit Board.
a
(1) PROBLEM
No display or mis-display in
the display window by
touching the keys.
STEP
B. TROUBLESHOOTING
Voltage
incorrect.
Each voltage
OK.
120 Volts.
120
0 Volt.
120
Check resistance of
Touch Key Board.
(See page 6)
Touch Key Board.
Resistance
incorrect.
(ON or OFF)
Each resistance
OK.
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.
SEQUENCE
Replace Control
Circuit Board.
Replace Touch
Key Board.
Correct seating of
Connector S101 or
replace Control
Circuit Board.
Replace it
if necessary.
Normal Control
Circuit Board.
Normal Touch
Key Board.
Normal Control
Circuit Board.
Runs
Runs
Runs
PROBLEM
1-b
Runs
R E S U LLTT
-8-
Door Sensing Switch.
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.
a
(3) PROBLEM
Oven does not heat up.
Continuity
OK.
0 Volts.
120
AC 120 Volts.
120
No
continuity.
Check contact
of Connector
S102.
CHECK : 1 . Power Supply to Oven.
2 . Primary Interlock Switch.
3 . Thermal Protector for Magnetron and
Thermal Protector for Cavity.
Check continuity of Connector
S102 between Pins (O and BL)
with the door closed after
removing Connector S102 from
Control Circuit Board.
a
(2) PROBLEM
Cooking operation will not
start.
STEP
Poor
contact.
Contact
OK.
SEQUENCE
Correct
seating.
Replace Control
Circuit Board.
Adjust or replace
Door Sensing Switch.
(See page 1)
Normal
contact.
Normal Control
Circuit Board.
Normal Door
Sensing Switch.
Runs
PROBLEM
3-b
Runs
Runs
PROBLEM
3-a
R E S U LLTT
-9-
H.V. Transformer.
Check operation of Blower
Motor when “START” key
is touched.
a
(4) PROBLEM
Low microwave power
output.
Check resistance of each
winding after removing
lead wires. (See page 4)
b
STEP
Normal
operation.
Replace H.V.
Transformer.
Replace
Magnetron.
Normal
resistance
Resistance
incorrect.
Replace Thermal Protector
for Magnetron or Thermal
Protector for Cavity.
Normal H.V.
Capacitor or
H.V. Diode.
Normal
Magnetron.
Replace Control
Circuit Board.
Replace
Blower
Motor.
Normal Control
Circuit Board.
Normal Blower
Motor.
Normal Thermal Protector
for Magnetron or Thermal
Protector for Cavity.
Replace H.V.
Capacitor or
H.V. Diode.
Normal H.V.
Transformer.
Defective
H.V. Capacitor
or H.V. Diode.
Measure resistance
of Blower Motor
Approx. 63 ohms.
Check H.V. Capacitor or H.V.
Diode with an ohm-meter after
removing lead wires.
(See page 5)
Temporarily short
No
operation. across terminals
of Thermal
Protector for
Magnetron or
No
Thermal Protector
operation.
for Cavity by using
jumper lead.
Normal
operation.
Resistance
incorrect.
Resistance
OK.
Normal H.V.
Capacitor or
H.V. Diode.
SEQUENCE
Runs
Runs
Runs
PROBLEM
3-b
Runs
Runs
Runs
R E S U LLTT
- 10 -
Set power level
at “50”.
a
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.
Check normal operation
of Control Circuit Board.
(6) PROBLEM
No buzzing by touching keys
and at the end of cooking.
a
(5) PROBLEM
The Magnetron operates on
high level when a lower
cook power is selected.
STEP
120V
120
Voltage cycles
on and off.
120
SEQUENCE
Replace Control
Circuit Board
Replace Control
Circuit Board
Normal Control
Circuit Board
Normal Control
Circuit Board
Runs
Runs
No problem.
Measure water
temperature
rise exactly.
R E S U LLTT
7 . DISASSEMBL
Y INSTRUCTIONS
DISASSEMBLY
• OVEN MUST BE DISCONNECTED FROM ELECTRICAL
OUTLET WHEN MAKING REPLACEMENTS, REP
AIRS,
REPAIRS,
ADJUSTMENTS AND CONTINUITY CHECKS BEFORE
PROCEEDING WITH ANY REP
AIR WORK. AFTER
REPAIR
AIT A
DISCONNECTING, W
ATT LEAST 1 MINUTE, UNTIL
WAIT
THE CAP
ACITOR IN THE HIGH-VOL
CAPACITOR
HIGH-VOLTTAGE AREA
HAS FULL
Y DISCHARGED.
FULLY
• WHEN REPLACING ANY DOOR MICROSWITCH,
REPLACE WITH THE SAME TYPE SWITCH SPECIFIED
ON THE P
AR
TS LIST
PAR
ARTS
LIST..
A. 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.
B. REMOVING PRIMAR
Y INTERLOCK SWITCH AND
PRIMARY
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 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.
(3) Push the door sensing switch upward while pressing
adjacent upper switch stopper of lever stopper and
lower switch stopper down (Figure 10-a).
Switch Stoppers
(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.
Interlock
Monitor
Switch
Primary
Interlock
Switch
Upper
Switch
Stopper
Door
Sensing
Switch
Switch Stoppers
Figure 10-b
Lower
Switch
Stopper
Figure 10-a
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.
- 11 -
C. REMOVING BLOWER MOTOR
(Figure 11 (Front View)
(1) Disconnect wires from Blower Motor.
(2) Unhook Control Frame after removing the screw.
(3) Remove 3 front screws securing the Blower Base.
D. REMOVING MAGNETRON
(Figure 12)
Screws
After removing the Blower Motor :
(1) Remove 4 screws and disengage Space Partition.
Blower Motor
(2) Disconnect lead wire from the Magnetron.
(3) Remove 4 screws securing the Magnetron to the
Waveguide.
(4) Take out Magnetron VERY CAREFULLY.
Figure 11
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
Magnetron
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.
H.V. Transformer
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.
5.
6.
Screws
After replacing the magnetron, be sure to check the
microwave energy leakage with a leakage detector
and confirm the leakage is below 4mW/cm2.
Figure 12
- 12 -
E. REMOVING FUSE
Remove the 20A fuse with a screwdriver.
NOTE
Control Circuit
Board
- 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
FOR SWITCHES” on page 6.
And make sure to check the microwave energy
leakage according to, “1. ADJUSTMENT
PROCEDURES” on page 1, when the primary
interlock switch, the relay 2 or the interlock
monitor switch is adjusted or replaced.
Control Frame
- 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.
Figure 13
F. REMOVING CONTROL CIRCUIT BOARD
(See exploded view on page 18 and Figure 13)
(1)
(2)
(3)
(4)
(5)
Control Sheet
Control Frame
Remove 1 screw securing the control panel
complete to the oven cavity.
Remove the connector S1, S2, S102, S104 and
the connector for the relay 2 from the control
circuit board.
Remove the FPC connector from the connector
S101 while grasping up both lever ends of the
plastic fastener.
Remove 3 screws securing the control circuit
board to the control frame.
Release 5 hooks holding control circuit board.
Touch Key
Board
G. REMOVING TOUCH KEY BOARD
(Figure 14)
(1)
(2)
Remove control sheet which is glued to touch
key board.
Remove the touch key board which is held on
the control frame with the adhesive tape.
Figure 14
- 13 -
H. REMOVING DOOR
J. REMOVING CA
VITY COVER
CAVITY
(Figure 16)
(1) Remove 2 hex nuts securing the upper hinge.
(1) Rotate anti-clockwise to loosen the hooks from
cavity compartment.
(2) Tilt the top of the door towards you.
(3) Lift up the door to remove it.
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.
Stirrer Fan
I. DISASSEMBLING DOOR
Cavity Cover
(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)
Figure 16
(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.
K. REMOVING TURNT
ABLE MOTOR
TURNTABLE
(4) To detach the door panel, insert a thin flat-blade
screwdriver between the door cover and door
main frame.
(Figure 17)
(1) Turn over the oven on its back.
(2) Remove 3 screws securing bottom plate to oven
cavity.
(3) Disconnect wires from lamp and turntable motor.
Hooks
Filter Assy
Hooks
Hooks
Screw
Screw
Door
Main
Frame
Choke
Dielectric
Hooks
Figure 15
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/cm2 to allow for measurement
uncertainty.
Cover, Hood Lamp
Figure 17
- 14 -
Bottom Plate
8 . EXPLODED VIEW AND P
AR
TS LIST
PAR
ARTS
CAVITY PARTS
***
Key
No.
1
1
2
3
4
5
6
6
7
8
9
10
11
12
12
13
14
15
15
16
17
18
19
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 (***).
Part No.
617
617
617
411
617
617
411
411
411
617
617
617
617
617
617
617
617
617
617
617
411
617
617
220
221
222
082
222
222
125
128
160
221
124
222
221
220
220
222
222
222
222
222
011
222
228
Description
9753
0124
1960
5201
2653
1977
2907
5806
6007
3286
1280
2011
9950
9579
9685
2691
2684
0604
0611
1991
0802
1113
8932
Cabinet (EM-S8000BS)
Cabinet (EM-S8000WS)
Cabinet BCT.
SCR TPG TRS 4 x 10 Z1
Damper Assy
Frame Bracket, Power Cord
SCR TPG TRS 4 x 10 ZK (EM-S8000BS)
SCR TPG TRS 4 x 10 C2 (EM-S8000WS)
SCR TPG TRS + SRT 4 x 10
Stay Plate, Rear (Not Service Part)
Lamp Socket
Lamp, 130V 40W
Lamp BCT
BottomPlate(NotServicePart)(EM-S8000BS)
BottomPlate(NotServicePart)(EM-S8000WS)
Filter Assy, Black
Filter Assy, Silver
Cover, Hood Lamp (EM-S8000BS)
Cover, Hood Lamp (EM-S8000WS)
Lamp Plate, Glass
Bolt Hex + SW + W5 x 14
Hinge Assy, Lower
Cavity Assy (Not Service Part)
Q’ty
Key
No.
1
1
1
46
1
1
8
8
1
1
3
2
1
1
1
2
2
1
1
1
2
1
1
20
21
22
23
24
25
25
26
26
27
28
29
30
31
32
33
34
35
36
37
38
39
- 15 -
Part No.
Description
617 222 2219
617 221 9943
Stay Plate, Left
Cavity Rear Plate, Left
1
1
617
411
617
617
617
617
617
411
617
617
617
617
411
617
411
617
617
617
617
Cavity Rear Plate, Right
SCR TPG PAN 3 x 30 Z1
Louver (EM-S8000BS)
Louver (EM-S8000WS)
Grille (EM-S8000BS)
Grille (EM-S8000WS)
Spring
SCR TPG BIN 3 x 10 Z1
Lamp, 120V 20W
Cam
Gear Motor, Louver
Lead Wire Assy, Louver
SCR TPG PAN 4 x 8 Z1
Duct, Cavity Top
SCR TPG PAN 3 x 6 Z1
Thermal Fuse 167oC
Cover, Thermal Fuse
Cover, Lamp
Motor Comp, Hood Fan
1
2
1
1
1
1
2
2
1
1
1
1
2
1
1
1
1
1
1
221
073
221
221
221
221
222
129
005
222
222
222
007
221
006
200
222
222
222
9936
0604
4924
5006
2838
2852
2356
5805
5147
2318
2332
0512
8409
2173
6604
0381
1984
1229
2516
Q’ty
SWITCHES AND MICROWAVE PARTS
***
Key
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
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 (***).
Part No.
Description
Q’ty
411
617
617
617
617
617
617
617
411
617
411
411
160
222
222
221
124
221
221
222
006
222
082
129
6106
2417
2530
9523
2300
3606
9912
2509
6604
2523
5201
5805
SCR S-T TRS + SRT 4 x 10
Power Cord
H.V Transformer,*** YS-S8000
Bottom BCT.
Lead Wire Assy
Lead Wire Assy W / Diode
Space Partition
Thermostat 60oC
SCR TPG PAN 3 x 6 Z1
H.V Capacitor 10uf. 250V
SCR TPG TRS 4 x 10 Z1
SCR TPG BIN 3 x 10 Z1
1
1
1
1
1
1
1
1
2
1
18
1
617
617
617
423
617
617
617
617
411
617
221
197
196
021
137
077
197
124
102
226
7628
7417
8507
3704
8269
5830
6670
1235
5907
9368
Space Partition
Motor Complete
Blower Fan
Fuse, 250V 20A
Fuse Holder
Capacitor Band
H.V. Capacitor, 0.97uf 2.2KV.
Thermostat 122oC
SCR ETG TRS 4 x 10 N2
Collar
1
1
1
1
1
1
1
1
2
1
Key
No.
Part No.
24
25
26
27
415
411
617
617
28
617 220 4536
29
617 220 4529
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
617
617
617
411
617
617
617
617
617
617
617
617
617
617
617
- 16 -
002
160
226
220
Description
245
245
222
010
222
120
080
220
204
200
222
222
222
222
222
6101
6106
2987
4529
6256
6096
0529
5808
2226
8481
5315
9401
9489
0657
0550
2189
2202
2196
2172
Magnetron, 2M219H(B)A***
SCR S-T TRS + SRT 4 x 10
Harness, Door Sensing
Micro Switch,*** Primary
Interlock V-5230Q
Micro Switch,*** Interlock
Monitor V-5220Q
Micro Switch,*** Door Sensing
V-5230Q
Latch Lever***
Lever Stopper***
Harness
SCR EVR PAN 4 x 10 Z1
Gear Motor
Insulation Sheet
Special Washer
Turn Table Shaft
Roller Base Assy
Shelf
Cavity Cover
Stirrer Fan
Gear Motor, Stirrer
Stirrer Shaft
Lamp Plate
Q’ty
1
4
1
1
1
1
1
1
1
4
1
1
1
1
1
1
1
1
1
1
1
DOOR PARTS
***
Key
No.
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 (***).
Part No.
222
223
220
223
222
Description
1
1
2
2
3
617
617
617
617
617
2097
2089
9715
2072
2035
3
617 228 8956
Door Panel*** (EM-S8000BS)
Door Panel*** (EM-S8000WS)
Door Cover*** (EM-S8000BS)
Door Cover*** (EM-S8000WS)
Door Main Frame*** (Also
order Door Sheet when replacing
Door Main Frame) (EM-S8000BS)
Door Main Frame*** (Also
order Door Sheet when replacing
Door Main Frame) (EM-S8000WS)
Q’ty
Key
No.
1
1
1
1
1
4
5
6
7
8
9
10
11
1
- 17 -
Description
Part No.
617
411
411
411
617
617
617
617
222
082
011
054
227
220
179
101
1106
5201
0802
1903
7974
9722
2478
1494
Hinge Assy***
SCR TPG TRS 4 x 10 Z1***
Bolt Hex + SW + W 5 x 14***
Nut Hex + Flg W / SRT 5***
Door Sheet
Choke Dielectric***
Door Latch***
Spring***
Q’ty
1
1
2
2
1
1
1
1
CONTROL PANEL PARTS
***
Key
No.
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 (***).
Part No.
Description
1
617 222 2370
1
617 223 2126
2
617 222 2387
3
3
617 221 0988
617 221 0995
Control Sheet*** (Also order
Touch Key Board when replacing
Control Sheet) (EM-S8000BS)
Control Sheet*** (Also order
Touch Key Board when replacing
Control Sheet) (EM-S8000WS)
Touch Key Board*** (Also order
Control Sheet when replacing
Touch Key Board)
Control Frame*** (EM-S8000BS)
Control Frame*** (EM-S8000WS)
Q’ty
1
1
1
1
1
PRINTED MATTER (Items Not Illustrated)
Key
No.
Part No.
Description
617 222 2622
Operating Instruction
(English / Spanish)
Installation Manual
(English / Spanish)
Template
Template
Carton Box Complete (EM-S8000BS)
Carton Box Complete (EM-S8000WS)
Name Plate (EM-S8000BS)
Name Plate (EM-S8000WS)
617 222 2615
617
617
617
617
617
617
222
222
222
223
222
223
2639
2646
2554
2164
2134
2096
Q’ty
1
1
1
1
1
1
1
1
- 18 -
Key
No.
4
5
6
7
8
9
10
11
12
13
14
14
Part No.
411
617
617
617
411
617
411
617
411
617
617
617
082
195
221
221
006
200
129
222
128
080
222
222
Description
5201
8263
9929
8588
6604
0381
5805
0567
3604
9559
0581
0598
SCR TPG TRS 4 x 10 Z1
Power & Control Circuit Board***
Space Partition***
Bottom Plate***
SCR TPG PAN 3 x 6 Z1
Thermal Fuse 167oC
SCR TPG BIN 3 x 10 Z1
Latch Lever***
SCR TPG BIN 3 x 12 Z1
Spring, Door Release Lever***
Door Release Lever***(EM-S8000BS)
Door Release Lever***(EM-S8000WS)
Q’ty
1
1
1
1
1
1
1
1
3
1
1
1
CONTROL CIRCUIT BOARD
(Part No. 617 195 8263
8263)
11300
- 19 -
CONTROL CIRCUIT BOARD
(Part No. 617 195 8263
8263)
Key No.
Order Part No.
Description
Q’ty
INTEGRATED CIRCUIT.
IC11
409 468 0001
Key No.
Order Part No.
Description
Q’ty
R13, 14
401 016 2505
Carbon, 220 ohms
+-5%, 1/4W.
2
R11
401 016 3700
Carbon, 2.2K ohms
+-5%, 1/4W.
1
R132
401 017 1705
Carbon, 2.7K ohms
+-5%, 1/4W.
1
RESISTORS.
IC LM8773-136FP.
1
TRANSISTORS.
Q12
405 005 8400
2SA854-Q-T93.
1
Q101, 102
405 082 4609
DTA123YS-TP.
2
Q103 ~ 110,
116 ~ 119
405 072 9904
DTA114ES.
12
R123
401 018 2701
Carbon, 330 ohms
+-5%, 1/4W.
1
Q129
405 011 8609
2SC1740S-S-TP.
1
R124
401 018 3708
405 141 4106
DTC114YSA-TP.
9
Carbon, 3.3K ohms
+-5%, 1/4W.
1
Q111 ~ 115,
120 ~ 123
R24
401 019 6104
405 125 0902
2SB1238-TV2-Q.
2
Carbon, 4.7 ohms
+-5%, 1/4W.
1
Q11, 14
R120
401 020 0702
Carbon, 470 ohms
+-5%, 1/4W.
1
R17, 121
110 ~ 115
401 020 1907
Carbon, 4.7K ohms
+-5%, 1/4W.
8
R103, 126
401 020 2805
Carbon, 47K ohms
+-5%, 1/4W.
2
R118, 119
401 021 0602
Carbon, 56 ohms
+-5%, 1/4W.
2
R12, 20
401 021 2903
Carbon, 5.6K ohms
+-5%, 1/4W.
2
401 023 1607
Carbon, 820 ohms
+-5%, 1/4W.
1
DIODES.
D11, 12, 103
407 012 0200
1N4002-TP.
3
D14, 15, 101
102, 104
105 ~ 117
407 012 4406
1SS133-TP.
18
ZD14
407 054 5003
RD13ESB2-TP.
1
ZD11
407 057 0500
RD5.6ESB3.
1
ZD12
407 160 6703
RD27ESB1.
1
ZD15, 101
407 132 2306
HZS3.9ENB2.
2
D1, 118, 119
407 012 0408
1N4004-TP.
3
R117
C112
403 002 4708
Ceramic, 0.1mfd,
+-5%, 25V.
1
MISCELLANEOUS.
C102 ~ 104,
109 ~ 111
403 069 8305
Ceramic, 0.01mfd,
+-5%, 50V.
6
C101
403 147 8807
Electrolytic, 1mfd,
+-20%, 50V.
1
CAPACITORS.
C13
403 147 8609
Electrolytic, 47mfd,
+-20%, 10V.
1
C11, 12
403 045 2907
Electrolytic, 1000mfd,
+-20%, 25V.
2
C14
403 147 8708
Electrolytic, 47mfd,
+-20%, 25V.
1
RESISTORS.
R141
401 069 8103
Oxide - MT 8.2K
+-5%, 2W.
1
BZ1
420 000 6800
Buzzer, PKM22EPT.
1
VST1
407 118 5505
Varistor ENC 471D-10A.
1
DT1
617 220 9807
Display Tube.
1
RL1, 3 ~ 6
RL2
617 201 3978
Relay, G5N-1A-DC12.
5
617 141 0549
Relay, DU12D1-1PR.
1
RL7, 8
617 196 7869
Relay, AJQ1341.
2
RS1
617 128 3372
Ceramic Oscillator.
1
S1
617 201 3985
Connector.
1
S2
617 220 2525
Connector.
1
S101
617 227 3600
Connector, 12P.
1
S102
617 226 6510
Connector.
1
S104
617 225 3657
Connector.
1
617 222 7344
Step-Down Transformer,
P6TK-S8000.
1
R116
401 012 4404
Carbon, 100 ohms
+-5%, 1/4W.
1
PT1
R101, 125
104 ~ 109
401 012 5609
Carbon, 1K ohms
+-5%, 1/4W.
8
FG
617 226 7425
Lead Wire.
1
PH1
407 200 4904
PH / Couple PC817 x 3.
1
R15, 102,
122, 127, 133
401 012 6903
Carbon, 10K ohms
+-5%, 1/4W.
5
2
617 079 4107
Part Base.
1
R137, 138
401 012 8006
Carbon, 100K ohms
+-5%, 1/4W.
2
JB101
617 144 9266
Noise Filter.
1
JB2 ~ 6
J4 ~ 19
617 132 5744
Noise Filter.
5
617 079 4299
Jumper.
6
J101 ~ 104,
106, 107, 109
111 ~ 130,
132, 134
617 079 4237
Jumper.
29
R52, 26
401 013 6308
Carbon, 12K ohms
+-5%, 1/4W.
2
R21 ~ 23
401 015 0403
Carbon, 18 ohms
+-5%, 1/4W.
3
- 20 -
9 . OVERALL CIRCUIT DIAGRAM
- 21 -
">
