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R939(W)
SERVICE MANUAL
S9614R939PHW/
MICROWAVE OVEN WITH
GRILL AND CONVECTION
CONTENTS
CHAPTER 1. BEFORE SERVICING
CHAPTER 2. WARNING TO SERVICE PERSONNEL
CHAPTER 3. PRODUCT SPECIFICATIONS
CHAPTER 4. APPEARANCE VIEW
CHAPTER 5. OPERATION SEQUENCE
MODELS
R-939(BK)
R-939(IN)
R-939(W)
In interests of user-safety the oven should be restored to its
original condition and only parts identical to those specified
should be used.
CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY
CHAPTER 10. PRECAUTIONS FOR USING LEADFREE SOLDER
CHAPTER 11. COMPONENT REPLACEMENT AND
ADJUSTMENT PROCEDURE
CHAPTER 12. MICROWAVE MEASUREMENT
CHAPTER 6. FUNCTION OF IMPORTANT COMPONENTS
CHAPTER 7. TROUBLESHOOTING GUIDE
CHAPTER 8. TEST PROCEDURES
CHAPTER 13. TEST DATA AT A GLANCE
CHAPTER 14. CIRCUIT DIAGRAMS
Parts List
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.

CONTENTS
CHAPTER 1. BEFORE SERVICING
[1] GENERAL IMPORTANT INFORMA-
TION ........................................................... 1-1
[2] WARNING................................................... 1-1
[3] CAUTION MICROWAVE RADIATION ........ 1-2
CHAPTER 2. WARNING TO SERVICE PERSONNEL
CHAPTER 3. PRODUCT SPECIFICATIONS
CHAPTER 4. APPEARANCE VIEW
[1] OVEN.......................................................... 4-1
[2] TOUCH CONTROL PANEL ........................ 4-1
CHAPTER 5. OPERATION SEQUENCE
[1] OFF CONDITION........................................ 5-1
[2] MICROWAVE COOKING CONDITION....... 5-1
[3] GRILL COOKING CONDITION .................. 5-2
[4] CONVECTION COOKING CONDITION..... 5-2
[5] DUAL COOKING CONDITION ................... 5-2
[6] ON/OFF TIME RATIO ................................. 5-3
[7] AUTOMATIC COOKING ............................. 5-3
[8] POWER OUTPUT REDUCTION ................ 5-3
[9] FAN MOTOR OPERATION ......................... 5-3
[10] CONVECTION MOTOR OPERATION........ 5-3
CHAPTER 6. FUNCTION OF IMPORTANT COMPONENTS
[1] DOOR OPEN MECHANISM ....................... 6-1
[2] MONITORED LATCH SWITCH (SW1) ....... 6-1
[3] STOP SWITCH (SW2)................................ 6-1
[4] MONITOR SWITCH (SW3)......................... 6-1
[5] FUSE (F1) 20A 250V .................................. 6-1
[6] FUSE (F2) F8A 250V (NOISE FILTER) ...... 6-1
[7] TC TRANSFORMER .................................. 6-1
[8] THERMAL CUT-OUT (TC1) 125C (MG)..... 6-1
[9] THERMAL CUT-OUT (TC2) 170C
(GRILL) ....................................................... 6-1
[10] THERMAL CUT-OUT (TC3) 170C
(CONV.)....................................................... 6-1
[11] ASYMMETRIC RECTIFIER........................ 6-1
[12] NOISE FILTER............................................ 6-2
[13] TURNTABLE MOTOR (TTM)...................... 6-2
[14] FAN MOTOR (FM) ...................................... 6-2
[15] CONVECTION MOTOR (CM)..................... 6-2
[16] GRILL HEATING ELEMENT (GH) .............. 6-2
[17] CONVECTION HEATING ELEMENT
(CH) ............................................................ 6-2
[18] CONVECTION COOKING SYSTEM .......... 6-2
[19] FIRE SENSING FEATURE ......................... 6-2
[20] OPEN JUDGE BY THERMISTOR .............. 6-2
[21] DAMPER OPEN-CLOSE MECHANISM..... 6-2
CHAPTER 7. TROUBLESHOOTING GUIDE
[1] FOREWORD............................................... 7-1
[2] CHART........................................................ 7-2
CHAPTER 8. TEST PROCEDURES
[1] Procedure A: MAGNETRON TEST ............ 8-1
[2] Procedure B: HIGH VOLTAGE TRANS-
FORMER TEST .......................................... 8-2
[3] Procedure C: HIGH VOLTAGE RECTIFI-
ER TEST..................................................... 8-2
[4] Procedure D: HIGH VOLTAGE CAPACI-
TOR TEST .................................................. 8-2
[5] Procedure E: SWITCH TEST...................... 8-3
[6] Procedure F: THERMISTOR TEST ............ 8-3
[7] Procedure G: THERMAL CUT-OUT
TEST........................................................... 8-3
[8] Procedure H: MOTOR WINDING TEST..... 8-3
[9] Procedure I: NOISE FILTER TEST............. 8-4
[10] Procedure J: BLOWN FUSE (F1) 20A ........ 8-4
[11] Procedure K: BLOWN FUSE (F2) 8A
(NOISE FILTER) ......................................... 8-4
[12] Procedure L: GRILL HEATING ELE-
MENTS (TOP) AND CONVECTION
HEATING ELEMENT TEST ........................ 8-4
[13] Procedure M: CONTROL PANEL AS-
SEMBLY TEST ........................................... 8-4
[14] Procedure N: JOG AND SWITCH UNIT
TEST........................................................... 8-5
[15] Procedure O: RELAY TEST........................ 8-6
[16] Procedure P: PROCEDURES TO BE
TAKEN WHEN THE FOIL PATTERN ON
THE PRINTED WIRING BOARD (PWB)
IS OPEN ..................................................... 8-6
CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY
[1] OUTLINE OF TOUCH CONTROL PAN-
EL ............................................................... 9-1
[2] SERVICING FOR TOUCH CONTROL
PANEL ........................................................ 9-1
CHAPTER 10. PRECAUTIONS FOR USING LEADFREE SOLDER
CHAPTER 11. COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
[1] BEFORE OPERATING ..............................11-1
[2] OUTER CASE REMOVAL .........................11-1
[3] HIGH VOLTAGE COMPONENTS RE-
MOVAL.......................................................11-1
[4] HIGH VOLTAGE TRANSFORMER RE-
MOVAL.......................................................11-2
[5] MAGNETRON REMOVAL .........................11-2
[6] CONTROL PANEL ASSEMBLY RE-
MOVAL.......................................................11-2
[7] FAN MOTOR REREPLACEMENT.............11-2
[8] TURNTABLE MOTOR REPLACEMENT....11-3
[9] CONVECTION MOTOR AND CONVEC-
TION HEATING ELEMENT REMOVAL .....11-3
[10] POSITIVE LOCK........................................11-4
[11] OVEN LAMP SOCKET REMOVAL............11-4

R939(W)
2 – 1
R939(W)
Service Manual
CHAPTER 2. WARNING TO SERVICE PERSONNEL
REMEMBER TO CHECK 3D
1) Disconnect the supply.
2) Door opened, and wedged open.
3) Discharge high voltage capacitor.
WARNING: AGAINST THE CHARGE OF THE
HIGH-VOLTAGE CAPACITOR
GB Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following
parts will result in electrocution.
High voltage capacitor, High voltage transformer, Magnetron, High voltage rectifier assembly, High voltage
harness.
REMEMBER TO CHECK 4R
1) Reconnect all leads removed from components during testing.
2) Replace the outer case (cabinet).
3) Reconnect the supply.
4) Run the oven. Check all functions.
NL
Magnetronovens bevatten circuits die een zeer hoge spanning en stroom kunnen voortbrengen. Contact met de
volgende onderdelen kan elektrocutie tot gevolg hebben.
Hoogspanningscondensator, hoogspanningstransformator, magnetron, hoogspanningsgelijkrichter, hoogspannings
kabelboom.
VERGEET DE VOLGENDE 3 STAPPEN NIET
1) Haal de stekker uit het stopcontact.
2) Open de deur en zorg ervoor dat hij niet dicht kan vallen.
3) Ontlaad de hoogspanningscondensator.
PAS OP VOOR DE ELECTRISCHE LADING VAN DE
HOOGSPANNINGSCONDENSATOR
VERGEET DE VOLGENDE 4 STAPPEN NIET
1) Sluit de draden weer aan diezijn losgehaald voor de test.
2) Plaats de buitenmantel weer om het toestel heen (kabinet).
3) Stop de stekker weer in het stopcontact.
4) Zet de oven aan. Controleer alle functies.
Wanneer alle reparaties zijn uitgevoerd en de oven weer in
elkaar is gezet, moet de het magnetronvermogen worden
gecontroleerd en moet worden gecontroleerd of er geen
microgolflekkage is.
The high-voltage capacitor remains charged about
60 econds after the oven has been switched off. Wait
for 60 seconds and then short-circuit the connection
ofthe high-voltage capacitor (that is, of the connectinglead of the high-voltage rectifier) against the chassiswith the use of an insulated screwdriver.
Sharp recommend that wherever possible fault-findingis
carried out with the supply disconnected. It may in,some
cases, be necessary to connect the supply after the outer case has been removed, in this event carry out 3D
checks and then disconnect the leads to the primary of
the high voltage transformer. Ensure that these leadsremain isolated from other components and the oven chassis. (Use insulation tape if necessary.) When the testing
is completed carry out 3D checks and reconnectthe
leads to the primary of the high voltage transformer.
Microwave ovens should not be run empty. To test for
the presence of microwave energy within a cavity, place
a cup of cold water on the oven turntable, close the door
and set the power to HIGH and set the microwave timer
for two (2) minutes. When the two minutes has elapsed
(timer at zero) carefully check that the water is now hot.If
the water remains cold carry out 3D checks and reexamine the connections to the component being tested.
When all service work is completed, and the oven is
fully assembled, the microwave power output should
be checked and a microwave leakage test should be
carriedout.
De hoogspanningscondensator blijft nog ongeveer 60
seconden lang opgeladen, nadat de oven is uitgeschakeld.
Wacht 60 seconden voordat u de verbinding van de
hoogspannings-condensator (m.a.w. de verbindingsdraad
van de hoogspanningsgelijkrichter) met een ge soleerde
schroevedraaier kortsluit tegen het chassis.
Sharp beveelt ten sterkste aan dat, voor zover mogelijk,
defecten worden opgespoord wanneer de stekker uit het
stopcontact is gehaald. Soms is het nodig om de stroomtoevoer
weer tot stand te brengen nadat de buitenmantel verwijderd is.
Herhaal dan de bovengenoemde 3 stappen en haal
deelectrische draden uit de primaire zijde van de
vermogenstransformator. Zorg ervoor dat deze draden
ge•soleerd blijven van andere elementen en van het chassis
van de oven. (Gebruik zo nodig isolatieband.) Wanneer de
test is uitgevoerd, herhaalt u de bovenstaande 3 stappen en
verbindt u de electrische draden weer aan de primaire zijde
van de vermogenstransformator.
Magnetronovens mogen niet leeg aangezet worden. Om te
controleren of er microgolf-energie binnen de oven wordt
geproduceerd, plaatst u een mok met koud water op de
draaitafel van de oven, sluit de deur, zet de oven op HIGH en
stelt de klok van de magnetron in op twee (2) minuten. Wanneer
de twee minuten voorbij zijn (klok staat op nul), controleert u
voorzichtig of het water heet is. Indien het water nog steeds
koud is, herhaalt u de allereerste drie stappen en controleer
nogmaals de aansluitingen naar de geteste onderdelen.

R939(W)
3 – 1
R939(W)
Service Manual
CHAPTER 3. PRODUCT SPECIFICATIONS
TEM DESCRIPTION
Power Requirements
230 Volts
50 Hertz
Single phase, 3 wire earthed
Power Consumption Microwave cooking 1.5 kW Approx 6.7A
Convection cooking 2.8 kW Approx 12.2A
Grill cooking 2.8 kW Approx 12.2A
Dual cooking Micro and Grill ----------------2.80kW Approx 12.4A
Micro and Convection ----- 2.95kW Approx. 13.0A
Power Output
900 watts nominal of RF microwave energy (IEC60705 Test Procedure)
Operating frequency 2450 MHz
Grill heating element Power
Output
1300W (650W x 2)
Convection heating element
Power Output
1450W
Outer Case Dimensions
Width 550 mm
Height 368 mm including foot
Depth 537 mm NOTE: The Depth does not include the door opening handle.
Cooking Cavity Dimensions
Width 375 mm NOTE: Internal capacity is calculated by measuring maximum width, depth and height.
Height 272 mm Actual capacity for holding food is less.
Depth 395 mm
Turntable diameter 362 mm
Control Complement
Touch Control System
Timer (0 - 90 minutes)
Clock (1:00 - 12:59) or (0:00 - 23:59)
Microwave Power for Variable Cooking
Repetition Rate;
900W ....................................... Full power throughout the cooking time
630W ...................................... approx. 70% of FULL Power
450W ..................................... approx. 50% of FULL Power
270W ......................................approx. 30% of FULL Power
90W .......................................approx. 10% of FULL Power
Convection temperature control range:
250°C, 230°C, 220°C, 200°C, 190°C, 180°C, 160°C, 130°C, 100°C and 40°C
LESS( )/ MORE( ) buttons
LANGUAGE button
INFORMATION button
EXPRESS COOK button
EXPRESS DEFROST button
AUTO REHEAT button
AUTO COOK button
COOKING MODE dial
CONVECTION button
MICROWAVE POWER LEVEL button
TIMER/WEIGHT dial
CLOCK setting button
STOP button,
(START)/+ 1min button
Net Weight Approx. 23 kg

R939(W)
5 – 1
R939(W)
Service Manual
CHAPTER 5. OPERATION SEQUENCE
[1] OFF CONDITION
Closing the door activates the monitored latch switch and the stop
switch.
IMPORTANT
When the oven door is closed, the contacts COM-NC of the monitor switch must be open. When the microwave oven is plugged in
a wall outlet (230V / 50Hz), the line voltage is supplied to the noise
filter.
Figure O-1 on page 14-1
1. The control unit is not energized. The display shows nothing (Fig.
O-1 (a)).
2. Open the door. The contacts (COM-NC) of the monitored latch
switch are closed and the control unit is energized. Then contacts
of relays RY1
and RY5 are closed, and the oven lamp will light and
the display will show “SELECT LANGUAGE” in 5 languages. (Fig.
O-1(b)).
NOTE: NOTE: Once the language is selected using the LANGUAGE
key, the display will show “ENERGY SAVE MODE TO GO
OUT OF ENERGY SAVE MODE SET CLOCK” when the oven
is plugged in.
3. Close the door. The contacts (COM-NC) of the monitored latch
switch are opened and the contacts of relay RY1
are opened and
the oven lamp will be turned off. The display will show “ . 0". (Fig.
O-1(c)).
NOTE: Energy save mode
1) If the oven has not been used for more than 3 minutes, the
contacts of the relay RY5
will be opened and the control
unit will be not energized. Open and close the door, the
control unit will resume.
2) If the clock is set, this energy save mode does not work.
3) If the display shows different messages from ENERGY
SAVE MODE, the oven may be set in demo mode. Close
the door, see operation manual to cancel demo mode.
[2] MICROWAVE COOKING CONDITION
1. HIGH COOKING
Rotate the COOKING MODE dial to the micro setting. And press the
POWER LEVEL button once. And enter the cooking time by rotating
the TIMER/WEIGHT dial. And start the oven by pressing START button.
Function sequence
Figure O-2 on page 14-2
1. The line voltage is supplied to the primary winding of the high voltage transformer. The voltage is converted to about 3.3 volts A.C.
output on the filament winding and high voltage of approximately
2000 volts A.C. on the secondary winding.
2. The filament winding voltage (3.3 volts) heats the magnetron filament and the high voltage (2000 volts) is sent to the voltage doubling circuit, where it is doubled to negative voltage of
approximately 4000 volts D.C..
3. The 2450 MHz microwave energy produced in the magnetron generates a wavelength of 12.24 cm. This energy is channelled
through the waveguide (transport channel) into the oven cavity,
where the food is placed to be cooked.
4. When the cooking time is up, a signal tone is heard and the relays
RY1 + RY2 + RY6
go back to their home position.
The circuits to the oven lamp, high voltage transformer, fan motor
and turntable motor are cut off.
5. When the oven door is opened during a cooking cycle, the switches
come to the following condition.
The circuit to the high voltage transformer is cut off when the contacts
of relay RY2
, and the contacts (COM-NO) of the monitored latch
switch SW1 and monitor switch SW3
are made open. The circuit to the
fan motor is cut off when the relay RY6
is made open. The circuit to the
turntable motor is cut off when the contacts (COM-NO) of the monitored latch switch SW1
are made open. The oven lamp remains on
even if the oven door is opened after the cooking cycle has been interrupted, because the relay RY1
stays closed. Shown in the display is
remaining time.
6. MONITOR SWITCH CIRCUIT
The monitor switch SW3
is mechanically controlled by the oven
door, and monitors the operation of the monitored latch switch
SW1.
1) When the oven door is opened during or after the cycle of a
cooking program, the monitored latch switch SW1 and stop
switch SW2
must open their contacts (COM-NO) first. And the
contacts (COMNC) of the monitored latch switch SW1
are made
closed. After that the contacts (COM-NC) of the monitor switch
SW3 can be closed and the contacts (COM-NO) of monitor
switch SW3
are made open.
2) When the oven door is closed, the contacts (COMNC) of the
monitor switch SW3
must be opened and the contacts (COM-
NO) of monitor switch SW3
must be closed. After that the con-
tacts (COM-NO) of the monitored latch switch SW1
and the stop
switch SW2
are made closed. And the contacts (COM-NC) of
the monitored latch switch SW1 are made open.
3) When the oven door is opened and the contacts (COM-NO) of
the monitored latch switch SW1
remain closed, the fuse F2 F8A
will blow. Because the relay RY1
and monitor switch SW3 are
closed and a short circuit is caused.
2. MEDIUM HIGH, MEDIUM, MEDIUM LOW, LOW
COOKING
When the microwave oven is preset for variable cooking power, the
line voltage is supplied to the high voltage transformer intermittently
within a 32-second time base through the relay contact which is coupled with the current-limiting relay RY2
. The following levels of micro-
wave power are given.
CONNECTED COMPONENTS RELAY
Oven lamp, Turntable motor RY1
High voltage transformer RY2
Fan motor, RY6
CONDITION
SWITCH CONTACT
DURING
COOKING
DOOR OPEN
(NO COOKING)
Monitored latch
switch
COM-NO
COM-NC
Closed
Opened
Opened
Closed
Stop switch COM-NO Closed Opened
Monitor switch
COM-NO
COM-NC
Closed
Opened
Opened
Closed

R939(W)
5 – 2
SETTING;
NOTE: The ON/OFF time ratio does not exactly correspond to the
percentage of microwave power, because approx. 3 seconds
are needed for heating up the magnetron filament.
[3] GRILL COOKING CONDITION
1. TOP GRILL (Figure O-3)
In this condition the food is cooked by the top grill heating element .
Rotate the COOKING MODE dial to GRILL setting. And enter the
desired cooking time by rotating the TIMER/WEIGHT dial. When the
START button is pressed, the following operations occur:
1. The numbers on the digital readout start the count down to zero.
2. The oven lamp, cooling fan motor and turntable motor are energized.
3. The relay RY3 is energized and the main supply voltage is applied
to the top grill heating elements.
4. Now, the food is cooked by the top grill heating elements.
NOTE: The convection cooking condition will be carried out simulta-
neously until the temperature of the oven cavity rise to 220°C.
[4] CONVECTION COOKING CONDITION
1. PRE-HEATING (by 40°C - 130°C)
Rotate the COOKING MODE dial to the convection setting. And
programme the desired convection temperature of 40°C - 130°C by
touching CONVECTION button. When the START button is touched,
the following operations occur:
1. The relays RY1, RY6
and RY7 are energized, the oven lamp, turn-
table motor, fan motor and convection motor are turned on.
2. The relay RY4
is energized and the main supply voltage is applied
to the convection heating element.
3. After the temperature of oven cavity rises to the selected one, the
oven will continue to turned the convection heating element on and
off to maintain the temperature for 30 minutes.:
2. PRE-HEATING (by 160°C - 250°C)
Rotate the COOKING MODE dial to the convection setting. And
programme the desired convection temperature of 160°C - 250°C by
touching CONVECTION button. When the START button is touched,
the following operations occur:
1. The relays RY1, RY6
and RY7 are energized, the oven lamp, turn-
table motor, fan motor and convection motor are turned on.
2. The relay RY4
and RY3 are is energized and the main supply voltage is applied to the convection heating element and the grill heating elements.
3. After the temperature of oven cavity rises to the selected one, the
oven will continue to turned the convection heating element on and
off to maintain the temperature for 30 minutes. And simultaneously
the grill heating element will be operated at 10% power output.
3. CONVECTION COOKING (by 250°C)
Rotate the COOKING MODE dial to the convection setting. And
enter the cooking time by rotating the TIMER/ WEIGHT dial. And
select the desired cooking temperature 250°C by pressing the CONVECTION button. When the START button is pressed, the following
operations occur:
1. The relays RY1, RY6
and RY7 are energized, the oven lamp, turn-
table motor, fan motor and convection motor are turned on.
2. The relay RY4
and RY3 are energized and the main supply voltage
is applied to the convection heating element and the grill heating
elements.
3. The oven will continue to turn the convection heating element on
and off to maintain the temperature for the programmed cooking
time. And simultaneously the grill heating elements will be operated
at 10% power output.
4. CONVECTION COOKING (by 40°C - 230°C)
Rotate the COOKING MODE dial to the convection setting. And
enter the cooking time by rotating the TIMER/ WEIGHT dial. And
select the desired cooking temperature 40°C - 230°C by pressing the
CONVECTION button. When the START button is pressed, the following operations occur:
1. The relays RY1, RY6
and RY7 are energized, the oven lamp, turn-
table motor, fan motor and convection motor are turned on.
2. The relay RY4
is energized and the main supply voltage is applied
to the convection heating element.
3. The oven will continue to turn the convection heating element on
and off to maintain the temperature for the programmed cooking
time.
[5] DUAL COOKING CONDITION
1. MICROWAVE AND CONVECTION (Figure O-5a)
Rotate the COOKING MODE dial to DUAL 1 setting. And enter the
desired cooking time by rotating the TIMER/WEIGHT dial. And press
POWER LEVEL button to set the desired microwave power. And press
the CONVECTION button to set the cooking temperature. When the
START button is pressed, the following operations occur:
NOTE: The 100% microwave power level can not be selected.
When the START button is touched, the following operations occur:
1. The numbers on the digital read-out start the count down to zero.
2. The oven lamp, fan motor, turntable motor and convection motor
are energized.
3. The relay RY4
will be energized and the main supply voltage is
applied to the convection heating element.
4. The relay RY2
is energized and the microwave energy is generated
by magnetron.
5. Now, the food is cooked by microwave and convection energy
simultaneously.
2. MICROWAVE AND TOP GRILL (Figure O-5b)
Rotate the COOKING MODE dial to DUAL 2 setting. And enter the
desired cooking time by rotating the TIMER/ WEIGHT dial. And press
POWER LEVEL button to set the desired microwave power. When the
START button is pressed, the following operations occur:
1. The numbers on the digital read-out start the count down to zero.
2. The oven lamp, fan motor and turntable motor are energized.
3. The relay RY3
is energized and the main supply voltage is applied
to the grill heating elements.
4. The relay RY2
is energized and the microwave energy is generated
by magnetron.
5. Now, the food is cooked by microwave and grill simultaneously.
100% (HIGH)
32 sec. ON
70%
(MEDIUM
HIGH)
Approx. 70%
100%
24 sec. ON 8 sec. OFF
14 sec. OFF
20 sec. OFF
26 sec. OFF
50% (MEDIUM) Approx. 50%
18 sec. ON
30%
(MEDIUM
LOW)
Approx. 30%
12 sec. ON
10% (LOW) Approx. 10%
6 sec. ON

R939(W)
5 – 3
[6] ON/OFF TIME RATIO
In dual cooking, the magnetron operate within a 48 second time base.
The following table is the ON / OFF time ratio at each power output of
the magnetron.
[7] AUTOMATIC COOKING
Auto Cook functions automatically work out the correct cooking mode
and cooking time and/or cooking temperature. They will cook according to the special cooking sequence.
[8] POWER OUTPUT REDUCTION
After the same cooking mode is carried out for more than the basis
cooking time, the power output is automatically reduced by turning the
control relays on and off intermittently, as shown in the table below.
This is to protect the oven door against temperature rising.
NOTE: 1) If the multiple sequence cooking is carried out in the same
mode, the basis cooking time is calculated from the first.
2) Even if the cooking is stopped by the STOP key or opening
the door, the basis cooking time is calculated from the first.
3) If the same cooking mode is repeated within 1 minute and
15 seconds, the basis cooking time is calculated from the
first.
4) If the same menu of Automatic Cooking is repeated within
1 minute and 15 seconds, the power output of the microwave or the grill will be reduced to 70% after 20 minutes
when the oven is started at first.
[9] FAN MOTOR OPERATION
(in Grill, Convection and Dual mode)
When oven is stopped during cooking, or after the cooking is completed, the fan motor will operate if the oven cavity temperature is
above 120°C, and the fan motor will stop if the oven cavity temperature is below 105°C.
[10] CONVECTION MOTOR OPERATION
If the temperature of oven cavity is higher than 120°C after and when
operated by 250°C convection cooking, 250°C dual convection cooking or 250°C preheating, the convection motor will operate for maximum 1 minute until the oven cavity temperature drops below 105°C.
ON/OFF TIME RATIO
In grill cooking, convection cooking or dual cooking, the top heater,
bottom heater or magnetron operate within a 48 second time base.
The following table is the ON / OFF time ratio at each power output of
the top heaters, bottom heater or magnetron.
POWER OUTPUT ON TIME OFF TIME
100% 48 sec. 0 sec.
70% 36 sec. 12 sec.
50% 26 sec. 22 sec.
30% 16 sec. 32 sec.
10% 8 sec. 40 sec.
Cooking mode
Basis cooking
time (minutes)
Reduced power
output (%)
Time base
(seconds)
Microwave (100%) 20 70 32
Grill 15 70 48
Convection No reduction
D
U
A
L
Micro. (70%)
+ Grill
40 (Micro.) 50 48
15 (Grill) 50 48
Micro. (100%)
+ Grill
15 (Micro.) 50 48
15 (Grill) 50 48
Micro. (70%)
+ Conv.
40 (Micro.) 50 48
No reduction

R939(W)
6 – 1
R939(W)
Service Manual
CHAPTER 6. FUNCTION OF IMPORTANT COMPONENTS
[1] DOOR OPEN MECHANISM
The door can be opened by pulling the door handle.
When the door handle is pulled, the latch head is moved upward, and
released from the latch hook now the door can be opened.
Figure D-1. Door Open Mechanism
[2] MONITORED LATCH SWITCH (SW1)
1. When the oven door is closed, the contacts (COM-NO) of the
switch must be closed. And the contacts (COMNC) must be
opened.
2. When the oven door is opened, the contacts (COMNO) of the
switch must be opened. And the contacts (COM-NC) must be
closed.
[3] STOP SWITCH (SW2)
1. When the oven door is closed, the contacts (COM-NO) of the
switch must be closed.
2. When the oven door is opened, the contacts (COMNO) of switch
must be opened.
[4] MONITOR SWITCH (SW3)
The monitor switch is activated (the contacts opened) by the upper
latch head on the door while the door is closed. The switch is intended
to render the oven inoperative by means of blowing the fuse F2
F8A
when the contacts of the monitored latch switch SW1
fail to open when
the door is opened.
Function
1. When the door is opened, the contacts (COM-NC) of monitor
switch SW3
close (to the ON condition) due to their being normally
closed and contacts (COM-NO) open. At this time the contacts
(COM-NO) of monitored latch switch SW1
is in the OFF condition
(contacts open) due to their being normally open contact switches.
2. As the door goes to a closed position, the monitor switch SW3
contacts (COM-NC) are opened and contacts (COM-NO) closed and
then contacts (COM-NO) of monitored latch switch SW1
and stop
switch SW2
are closed.(On opening the door, each of these
switches operate inversely.)
3. If the door is opened and the monitored latch switch SW1
contacts
(COM-NO) fail to open, the fuse F2
F8A blows immediately after
closing of the monitor switch SW3
(COM-NC) contacts.
CAUTION: BEFORE REPLACING A NOISE FILTER (BLOWN FUSE
F2
F8A), TEST THE MONITORED LATCH SWITCH SW1
AND MONITOR SWITCH SW3 FOR PROPER OPERATION. (REFER TO CHAPTER “TEST PROCEDURE”).
[5] FUSE (F1) 20A 250V
If the wire harness or electrical components are shortcircuited, this
fuse F1
20A blows to prevent an electric shock of fire hazard.
[6] FUSE (F2) F8A 250V (NOISE FILTER)
1. If the wire harness or electrical components are shortcircuited, this
fuse blows to prevent an electric shock or fire hazard.
2. The fuse also blows when the monitored latch switch SW1
remains
closed with the oven door open and when the monitor switch SW3
contact (COM-NC) closes.
3. The fuse also blows when the asymmetric rectifier, H.V. rectifier,.
H.V. wire harness, H.V. capacitor, magnetron or secondary winding
of high voltage transformer is shorted.
[7] TC TRANSFORMER
T/C transformer converts A.C. line voltage into low voltage to drive the
control unit.
[8] THERMAL CUT-OUT (TC1) 125C (MG)
This thermal cut-out protects the magnetron against overheat. If the
temperature goes up higher than 125°C because the fan motor is
interrupted or the ventilation openings are blocked, the thermal cut-out
TC1
will open and switch off all the electrical parts. The defective ther-
mal cut-out must be replaced with a new one.
[9] THERMAL CUT-OUT (TC2) 170C (GRILL)
This thermal cut-out protects the oven against the overheat during grill
cooking, convection cooking or dual cooking. If the temperature rises
above 170°C because the fan motor is interrupted, the air inlet duct is
blocked or the ventilation openings are obstructed, the thermal cut-out
TC2
opens and switches off all the electrical parts. When the cut-out
cools itself down to the operating temperature of 155°C, the contacts
of the thermal cut-out will close again.
[10] THERMAL CUT-OUT (TC3) 170C
(CONV.)
This thermal cut-out protects the convection motor against overheating. If the temperature of the thermal cut-out TC3
rises above 170°C
because the convection fan is interrupted, the ventilation openings are
obstructed or the other abnormal matter occurs, the thermal cut-out
opens and switches off the convection heating element and the other
electrical parts. When the cut-out cools itself down to the operating
temperature of 155°C, the contacts of the thermal cut-out will close
again.
[11] ASYMMETRIC RECTIFIER
The asymmetric rectifier is solid state device that prevents current flow
in both directions. And it prevents the temperature rise of the high voltage transformer by blowing the fuse F2
F8A when the high voltage
rectifier is shorted.
Latch hook
Door
SW2: Stop switch
Latch
Heads
SW3: Monitor switch
SW1: Monitored
latch switch
Tab
D2 D1
ASYMMETRIC
RECTIFIER
HIGH VOLTAGE
RECTIFIER

R939(W)
6 – 2
the asymmetric rectifier is 1.7 KV. D1 and D2 of the asymmetric rectifier or high voltage rectifier are shorted when the each peak reverse
voltage goes beyond the each rated peak reverse voltage. (The process of the blowing the fuse F2
F8A.)
1. The high voltage rectifier is shorted by some fault when microwave
cooking or dual cooking.
2. The peak reverse voltage of D2 of the rectifier goes beyond the
rated peak reverse voltage 1.7 KV in the voltage doubler circuit.
3. D2 of the rectifier is shorted.
4. The large electric currents flow through the high voltage winding of
the high voltage transformer.
5. The large electric currents beyond 8A flow through the primary
winding of the high voltage transformer.
6. The fuse F2
F8A blows by the large electric currents.
7. The power supplying to the high voltage transformer is cut off.
[12] NOISE FILTER
The noise filter assembly prevents radio frequency interference that
might flow back in the power circuit.
[13] TURNTABLE MOTOR (TTM)
The turntable motor rotates the turntable.
[14] FAN MOTOR (FM)
The fan motor drives a blade which draws external cool air. This cool
air is directed through the air vanes surrounding the magnetron and
cools the magnetron. This air is channelled through the oven cavity to
remove steam and vapours given off from heating food. It is then
exhausted through the exhausting air vents of the oven cavity.
[15] CONVECTION MOTOR (CM)
The convection motor drives the convection fan and provide the
heated air.
[16] GRILL HEATING ELEMENT (GH)
The grill heating elements are provided to brown the food and are
located on the top of the oven cavity.
[17] CONVECTION HEATING ELEMENT
(CH)
The convection heating element situated at the rear of the oven cavity.
It is intended to heat air driven by the convection fan. The heated air is
kept in the oven and force-circulated and reheated by the convection
heating element.
[18] CONVECTION COOKING SYSTEM
This oven is designed with a hot air heating system where food is
heated by forced circulation of the hot air produced by the grill heaters.
The air heated by the grill heating elements is circulated through the
convection passage provided on the outer casing of the oven cavity by
means of the convection fan which is driven by the convection motor. It
is then enters the inside of the oven through the vent holes provided
on the back side of the oven. Next, the hot air heats the food on the
turntable and leaves the oven cavity through the vent in the oven cavity rear wall. In this way, the hot air circulates inside the oven cavity to
raise its temperature and, at the same time, comes into contact with
the food being cooked. When the temperature inside the oven cavity
reaches the selected temperature, the heating elements are de-energized. When the temperature inside the oven cavity drops below the
selected temperature, the heating elements are energized again. In
this way, the inside of the oven cavity is maintained at approximately
the selected temperature.
When the convection time reaches “0”, the heating elements are deenergized and the convection fan stops operating and the oven shuts off.
At that time if the cavity air temperature has risen above 120°C, the
fan motor remains rotating. Automatically the fan motor will be shut
down at low temperature (less than 105°C).
Figure D-2. Convection Cooking System
[19] FIRE SENSING FEATURE
The oven will stop its operation when there is a fire in the oven cavity
in microwave cooking condition. LSI measures the voltage across the
temperature measurement circuit intermittently within 32-seconds time
base since the oven is started in microwave cooking condition. The
oven will stop its operation when the difference of the voltage is more
than 0.39 volts in microwave cooking condition.
1. Within a 32-seconds base, the thermistor is energized for 2 seconds. At that time, the voltage across the temperature measurement circuit is measured.
2. The oven carries out the procedure above again. If the second voltage is 0.39V higher than first voltage, LSI judges it is a fire in the
oven cavity and stop the oven.
3. When LSI judges it is a fire in the oven cavity, LSI will switch off the
relays to high voltage transformer and fan motor and LSI stops
counting down.
[20] OPEN JUDGE BY THERMISTOR
1. If the temperature of the thermistor does not rise to more than 40°C
after 4 minutes and 15 seconds from when the oven is started in
convection, grill or dual cooking mode, the oven is turned off.
2. When the thermistor or the wire harness to the thermistor is
opened, the oven is turned off after 4 minutes and 15 seconds
because this condition is same as above.
[21] DAMPER OPEN-CLOSE MECHANISM
Damper position is set automatically by damper motor DM, damper
switch and motor cam. These components are operated by a signal
that judges if microwave cooking or convection cooking operation is
selected by the CPU unit.
Door
Oven Cavity
Grill Heating
Elements
Convection
Passage
Cooling
Fan
Convection
Motor
Convection
Fan
Turntable
Turntable Motor
Roller Stay
Convection
Heating Element
THERMISTOR
Sensing
Voltage
ON
OFF
ON
OFF
Sensing the voltage across temperature measurement circuit.

R939(W)
6 – 3
1. Microwave Cooking:
Damper is in the open position, because a portion of cooling air is
channelled through the cavity to remove steam and vapours given off
from the heating foods. It is then exhausted at the top of the oven cavity into a condensation compartment.
2. Convection Cooking:
Damper is in the closed position, so that no hot air will be allowed to
leak out the oven cavity.
3. Damper Operation
1. When power supply cord is plugged in or when the control unit
resumes after energy save mode finishes:
1) When power supply cord is plugged in, a signal is sensed in the
control unit, and operates shut-off relay (RY8).
2) Contacts of shut-off relay (RY8) close, the damper motor DM
is
energized, opening the damper door.
3) When the damper is moved to the open position by the damper
cam, damper switch SW4 is closed (ON position).
4) The signal of damper switch SW4 is re-sensed in the control
unit and shut-off relay (RY8) is turned off.
5) The rated voltage to the damper motor DM
is stopped and the
motor turns off.
2. When oven is microwave cooking: Damper is in the open position
3. When oven is convection cooking:
1) Damper motor DM
is energized right after the oven is started.
2) When damper is in the closed position (damper switch SW4
is
OFF), its signal is sensed by the control unit, and shut-off relay
(RY8) is de-energized.
3) The damper is held in the closed position during the convection
cooking operation.
4) At the end of the convection cooking, when the fan motor FM
stops, shut-off relay (RY8) is energized, and the damper is
returned to the open position.
NOTE: If the damper door is not in the proper position, closed during
convection, grill or dual, or open during microwave, the control
unit will stop oven operation after 1 minute.
4. Operation of damper is shown below.
Cooking Mode Operation of Damper
Microwave cooking Open
Convection cooking Closed
Grill; during backed up with convection
heating element
Closed
Grill; after convection heating element
backed up has stopped
Open
Dual (Microwave and Convection) Closed
Dual (Microwave and Grill) Open Open
Fire sensing condition Closed Closed

R939(W)
7 – 2
[2] CHART
Fuse F2 (F8A) blows when the door is opened.
Home fuse blows when power cord is plugged into wall outlet.
Fuse F1 20A blows when power cord is plugged into wall outlet.
Nothing appears in display when power cord is plugged into wall outlet
and the door is opened and closed.
Display does not operate properly when STOP button is pressed.
Oven lamp does not light when door is opened. (Display operates.)
Oven does not start when the START button is pressed. (Display operates.)
Oven lamp does not light and turntable motor does not operate.
Fan motor does not operate. (Oven lamp lights.)
Convection fan motor does not operate. (Fan motor operates.)
Turntable motor does not operate. (Oven lamp lights.)
Oven or any electrical parts (except fan motor) does not stop when
cooking time is 0 or STOP button is pressed.
Oven stops after 4 minutes and 15 seconds since START button is
pressed. (Except Microwave mode and Dual cook mode)
Display operates properly but all electrical parts do not operate.
Oven goes into cook cycle but shuts down before end of cooking cycle.
After cooking, the temperature of oven cavity is higher than 120ºC but
fan motor does not operate.
The oven stops 1 minute after starting.
Oven seems to be operating but little or no heat is produced in oven
load. (Microwave power control is set at 100%)
Oven does not seem to be operating properly during variable cooking
condition except 100% cooking condition.
Oven goes into cook cycle but shuts down before end of cooking cycle.
Convection cooking mode does not heat.
Oven seems to be operating but the temperature in the oven cavity is
lower or higher than preset one.
Grill heating element does not operate.
Oven goes into cook cycle but shuts down before end of cooking cycle.
Oven seems to be operating but little or no heat is produced in oven
load. (Microwave power does not seem to be generated properly)
Oven seems to be operating but the temperature in the oven cavity is
lower or higher than preset one.
Convection heating elements do not heat.
Grill heating element does not heat.
OFF
CONDITION
COOKING
CONDITION
(COMMON MODE)
MICROWAVE
COOKING
CONDITION
GRILL COOKING
CONDITION
CONVECTION
COOKING
CONDITION
DUAL COOKING
CONDITION
(COMMON MODE)
DUAL COOKING
CONDITION
(MICRO./CONV.)
DUAL COOKING
CONDITION
(MICRO./GRILL)
CONDITION
PROBLEM
BLOCKED
COOLING FAN
BLOCKED
CONVECTION FAN
NO POWER AT WALL OUTLET
HOME FUSE OR BREAKER
MIS-ADJUSTMENT OF SWITCHES
BLOCKED VENTILATION OPENINGS
OPENED WIRE HARNESS
SHORTED WIRE HARNESS
OVEN LAMP OR SOCKET
POWER SUPPLY CORD
FOIL PATTERN ON P.W.B.
RELAY RY8
RELAY RY7
RELAY RY6
RELAY RY5
RELAY RY4
RELAY RY3
RELAY RY2
RELAY RY1
KEY UNIT
TOUCH CONTROL PANEL
TC TRANSFORMER
CONVECTION HEATING ELEMENT
GRILL HEATING ELEMENT
NOISE FILTER (FUSE F2 F8A)
FUSE F1 20A
NOISE FILTER
DAMPER MOTOR DM
CONVECTION FAN MOTOR
FAN MOTOR FM
TURNTABLE MOTOR TM
THERMAL CUT-OUT 170ºC TC3
THERMAL CUT-OUT 170ºC TC2
THERMAL CUT-OUT 125ºC TC1
THERMISTOR
DAMPER SWITCH SW4
MONITOR SWITCH SW3
STOP SWITCH SW2
MONITORED LATCH SWITCH SW1
HIGH VOLTAGE CAPACITOR
H.V. HARNESS
H.V. RECTIFIER ASSEMBLY
HIGH VOLTAGE TRANSFORMER
MAGNETRON
TEST PROCEDURE
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
I J K L L MN OOOOOOOOP

R939(W)
8 – 1
R939(W)
Service Manual
CHAPTER 8. TEST PROCEDURES
[1] Procedure A: MAGNETRON TEST
NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL WHILE THE OVEN IS IN OPERATION.
CARRY OUT 3D
CHECKS.
Isolate the magnetron from the high voltage circuit by removing all leads connected to the filament terminal.
To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron filament terminals, the meter should show a
reading of less than 1 ohm.
To test for a short circuit filament to anode condition, connect ohmmeter between one of the filament terminals and the case of the magnetron
(ground). This test should be indicated an infinite resistance. If a low or zero resistance reading is obtained then the magnetron should be replaced.
MICROWAVE OUTPUT POWER (IEC60705)
The following test procedure should be carried out with the microwave oven in a fully assembled condition (outer case fitted). Microwave output power
from the magnetron can be measured by IEC test procedure, i.e. it can be measured by using water load how much it can be absorbed by the water
load. To measure the microwave output power in the microwave oven, the relation of calorie and watt is used. When P(W) heating works for t(sec-
ond), approximately P x t/4.187 calorie is generated. On the other hand, if the temperature of the water with V(ml) rises T (°C) during this microwave
heating period, the calorie of the water is v x T.
Measuring condition:
1) Container
The water container must be a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of
approximately 190 mm.
2) Temperature of the oven and vessel
The oven and the empty vessel are at ambient temperature prior to the start of the test.
3) Temperature of the water
The initial temperature of the water is (10±2)°C
4) Select the initial and final water temperature so that the maximum difference between the final water temperature and the ambient temperature is
5°C.
5) Select stirring devices and measuring instruments in order to minimize addition or removal of heat.
6) The graduation of the thermometer must be scaled by 0.1°C at minimum and an accurate thermometer.
7) The water load must be (1000±5) g.
8) "t" is measured while the microwave generator is operating at full power. Magnetron filament heat-up time is not included.
NOTE: The operation time of the microwave oven is "t + 3" sec. 3 sec. is magnetron filament heat-up time.
Measuring method:
1) 1.Measure the initial temperature of the water before the water is added to the vessel.
(Example: The initial temperature T1 = 11°C)
2) Add the 1 litre water to the vessel.
3) Place the load on the centre of the shelf.
4) Operate the microwave oven at 100% for the temperature of the water rises by a value T of 10°C.
5) Stir the water to equalize temperature throughout the vessel.
6) Measure the final water temperature. (Example: The final temperature T2 = 21°C)
7) Calculate the microwave power output P
in watts from above formula.
JUDGEMENT: The measured output power should be at least ± 15 % of the rated output power.
CAUTION: 1°C CORRESPONDS TO 90 WATTS. REPEAT MEASUREMENT IF THE POWER IS INSUFFICIENT.
The formula is as follows;
P x t / 4.187 = V x T+ 0.55 x mc (T2-T0)/4.187 P (W) = 4.187 x V x T / t + 0.55 x mc (T2-T0)/t
Our condition for water load is as follows:
Room temperature (T0) ......................... around 20°C Power supply ........................... VoltageRated voltage
Water load .........................................................1000 g Initial temperature (T1) .................................... 10±1°C
Heating time ..................................................... 47 sec. Mass of container (mc) ...................................... 330 g
T2 .................................................... Final Temperature T = T2 - T1 P = 90 x T + 0.55 x mc (T2-T0)/47
Room temperature ................................................................... To = 21°C
Initial temperature ..................................................................... T1 = 11°C
Temperature after (47 + 3) = 50 sec ...................................... T2 = 21°C
Temperature difference Cold-Warm ( T = T2 - T1) .......... T = 10°C
Measured output power
The equation is "P = 90 x T" .................... P = 90 x 10°C = 900 Watts

R939(W)
8 – 2
[2] Procedure B: HIGH VOLTAGE TRANSFORMER TEST
1. CARRY OUT 3D CHECKS.
2. Disconnect the leads to the primary winding of the high voltage transformer. Disconnect the filament and secondary winding connections from the
rest of the HV circuitry. Using an ohmmeter, set on a low range, it is possible to check the continuity of all three winding. The following readings
should be obtained:
a.Primary winding -------------------- approximately 1.9 Ω
b.Secondary winding --------------- approximately 123 Ω
c.Filament winding --------------------------- less than 1 Ω
If the readings obtained are not stated as above, then the high voltage transformer is probably faulty and should be replaced.
3. Also, the high voltage transformer has the thermal cut-out in the primary coil. The thermal cut-out will open when the temperature of the thermal
cut-out in the primary coil reaches approximately 150°C. The thermal cut-out resets automatically at 130°C. If an ohmmeter indicates an open circuit under normal condition, replace the high voltage transformer because the primary coil (thermal cut-out) has opened. An open primary coil
(thermal cut-out) indicates overheating of the high voltage transformer. Check for restricted air flow to the high voltage transformer, especially the
ventilation opening.
4. CARRY OUT 4R
CHECKS.
[3] Procedure C: HIGH VOLTAGE RECTIFIER TEST
CARRY OUT 3D CHECKS.
Isolate the high voltage rectifier assembly from the HV circuit. The high voltage rectifier can be tested using an ohmmeter set to its highest range.
Connect the ohmmeter across the terminal B+C of the high voltage rectifier and note the reading obtained. Reverse the meter leads and note this
second reading. The normal resistance is infinite in one direction and more than 100 kΩ in the other direction.
CARRY OUT 4R
CHECKS.
ASYMMETRIC RECTIFIER TEST
CARRY OUT 3D
CHECKS.
Isolate the high voltage rectifier assembly from the HV circuit. The asymmetric rectifier can be
tested using an ohmmeter set to its highest range across the terminals A+B of the asymmetric
rectifier and note the reading obtained. Reverse the meter leads and note this second reading.
If an open circuit is indicated in both directions then the asymmetric rectifier is good. If the
asymmetric rectifier is shorted in either direction, then the asymmetric rectifier is faulty and must be replaced with high voltage rectifier. When the
asymmetric rectifier is defective, check whether magnetron, high voltage rectifier, high voltage wire or filament winding of the high voltage transformer
is shorted.
CARRY OUT 4R
CHECKS.
NOTE: FOR MEASUREMENT OF THE RESISTANCE OF THE RECTIFIER, THE BATTERIES OF THE MEASURING INSTRUMENT MUST HAVE
A VOLTAGE AT LEAST 6 VOLTS, BECAUSE OTHERWISE AN INFINITE RESISTANCE MIGHT BE SHOWN IN BOTH DIRECTIONS.
[4] Procedure D: HIGH VOLTAGE CAPACITOR TEST
CARRY OUT 3D CHECKS.
1. Isolate the high voltage capacitor from the circuit.
2. Continuity check must be carried out with measuring instrument which is set to the highest resistance range.
3. A normal capacitor shows continuity for a short time (kick) and then a resistance of about 10MΩ after it has been charged.
4. A short-circuited capacitor shows continuity all the time.
5. An open capacitor constantly shows a resistance about 10 MΩ because of its internal 10MΩ resistance.
6. When the internal wire is opened in the high voltage capacitor shows an infinite resistance.
7. The resistance across all the terminals and the chassis must be infinite when the capacitor is normal.
WARNING: High voltages and large currents are present at the secondary winding and filament winding of the power transformer. It is
very dangerous to work near this part when the oven is on. NEVER make any voltage measurements of the high-voltage circuits, including the magnetron filament.
1000g
1000g
1000g
T1 C
T2 C
Heat up for 50 sec.
D2 D1
ASYMMETRIC
RECTIFIER
HIGH VOLTAGE
RECTIFIER
AB
C

R939(W)
8 – 3
If incorrect reading are obtained, the high voltage capacitor must be replaced.
CARRY OUT 4R
CHECKS.
[5] Procedure E: SWITCH TEST
CARRY OUT 3D CHECKS.
Isolate the switch to be tested and using an ohmmeter check between the terminals as described in the following table.
If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.
CARRY OUT 4R
CHECKS.
[6] Procedure F: THERMISTOR TEST
CARRY OUT 3D CHECKS.
Disconnect the connector B from CPU unit. Measure the resistance of the thermistor with an ohmmeter. Connect the ohmmeter leads to Pin No's C1
and C3 of the thermistor harness.
If the meter does not indicate above resistance, replace the thermistor.
CARRY OUT 4R
CHECKS.
[7] Procedure G: THERMAL CUT-OUT TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the thermal cut-out. Then using an ohmmeter, make a continuity test across the two terminals as described
in the below.
If incorrect readings are obtained, replace the thermal cut-out.
An open circuit thermal cut-out (MG) TC1
indicates that the magnetron has overheated, this may be due to resistricted ventilation, cooling fan failure.
An open circuit thermal cut-out (GRILL) TC2
indicates that the oven cavity has overheated, this may be due to no load operation.
An open circuit thermal cut-out (CONV.) TC3
indicates that the convection fan winding has overheated, this may be due to resistricted ventilation or
locked cooling fan or locked convection fan motor.
CARRY OUT 4R
CHECKS.
[8] Procedure H: MOTOR WINDING TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two terminals as described in the table below.
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R
CHECKS.
Table: Terminal Connection of Switch
Plunger Operation Common terminal to Normally open terminal Common terminal to Normally close terminal
Released Open circuit Short circuit
Depressed Short circuit Open circuit.
Room Temperature Resistance
20°C - 30°C Approximately 359.9 kΩ - 152 kΩ
Table: Thermal Cut-out Test
Parts Name
Temperature of “ON” condition
(closed circuit).
Temperature of “OFF” condition
(open circuit).
Indication of ohmmeter (When room
temperature is approx. 20°C.)
Thermal cut-out TC1
125°C This is not resetable type. Above 125°C Closed circuit
Thermal cut-out TC2
170°C Cuts back in at 155°C. Above 170°C Closed circuit
Thermal cut-out TC3
170°C Cuts back in at 155°C. Above 170°C Closed circuit
Table: Resistance of Motor
Motors Resistance
Fan motor Approximately 398.9 Ω
Turntable motor Approximately 14.7 kΩ
Convection fan motor Approximately 183.7 kΩ
Dumper motor Approximately 14.7 kΩ

R939(W)
8 – 4
[9] Procedure I: NOISE FILTER TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the noise filter. Using an ohmmeter, check
between the terminals as described in the following table.
If incorrect readings are obtained, replace the noise filter unit.
CARRY OUT 4R
CHECKS.
[10] Procedure J: BLOWN FUSE (F1) 20A
CARRY OUT 3D CHECKS.
If the fuse F1
20A is blown, there is a shorts or grounds in electrical parts or wire harness. Check them and replace the defective parts or repair the
wire harness.
CARRY OUT 4R
CHECKS.
CAUTION: Only replace fuse with the correct value replacement.
[11] Procedure K: BLOWN FUSE (F2) 8A (NOISE FILTER)
CARRY OUT 3D CHECKS.
1. If the fuse F2
F8A is blown when the door is opened, check the monitored latch switch SW1 and monitor switch SW3.
2. If the fuse F2
F8A is blown by incorrect door switching replace the defective switch(es) and the noise filter.
3. If the fuse F2
F8A is blown, there could be shorts in the asymmetric rectifier or there is a ground in wire harness. A short in the asymmetric rectifier
may be occurred due to short or ground in H.V. rectifier, magnetron, high voltage transformer or H.V. wire. Check them and replace the defective
parts or repair the wire harness.
CARRY OUT 4R
CHECKS.
CAUTION: REPLACE NOISE FILTER.
[12] Procedure L: GRILL HEATING ELEMENTS (TOP) AND CONVECTION HEATING ELEMENT TEST
CARRY OUT 3D CHECKS.
Before carrying out the following tests make sure the heating element is cool completely.
1. Resistance of heater.
Disconnect the wire leads to the heating element to be tested. Using ohmmeter with low resistance range. Check the resistance across the terminals of the heating element as described in the following table.
2. Insulation resistance.
Disconnect the wire leads to the heating element to be tested. Check the insulation resistance between the element terminal and cavity using a
500V - 100MΩ insulation tester. The insulation resistance should be more than 10 MΩ in the cold start.
If the results of above test 1 and/or 2 are out of above specifications, the heating element is probably faulty and should be replaced.
CARRY OUT 4R
CHECKS.
[13] Procedure M: CONTROL PANEL ASSEMBLY TEST
The control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore, unlike conventional microwave ovens, proper maintenance can not be performed with only a voltmeter and ohmmeter.
In this service manual, the control panel assembly is divided into two units, Control Unit and Jog and Switch Unit, and also the control unit is divided
into two units, CPU unit and Power unit, and troubleshooting by replacement is described according to the symptoms indicated.
1. Jog and Switch Unit Note: Check Jog and Switch unit wire harness connection before replacement.
The following symptoms indicate a defective Jog and Switch unit. Replace the Jog and Switch unit.
1) Tact switch
a) When touching the buttons, a certain button produces no signal at all.
MEASURING POINT INDICATION OF OHMMETER
Between N and L Approx. 680 kΩ
Between terminal N and WHITE Short circuit
Between terminal L and RED Short circuit
Table: Resistance of heater
Parts name Resistance
Grill heating elements GH
(Top) Approximately 37.4 Ω -39.7Ω [(18.7Ω - 19.85Ω) x 2 ]
Convection heating elements CH
Approximately 34.09 Ω - 36.72Ω
F2: F8A
F1
20A
WHT
RED
R1
R2
N
Cx
Cy
L
L
L
L (min) Cx ± 20% Cy ± 20% R1 R2
1.0mH 0.22 uF 4700pF 10 M 680k

R939(W)
8 – 5
b) When touching the buttons, sometimes a button produces no signal.
2) Potentiometer
a) When rotating the potentiometer, the cooking mode can not be selected.
3) Encoder
a) When rotating the encoder, the cooking time or the weight of food can not be entered.
2. Control Panel
The following symptoms indicate a defective control unit. Before replacing the control unit, perform the Jog and Switch unit test (Procedure N) to
determine if control unit is faulty.
1) In connection with buttons
a) When touching the buttons, a certain group of buttons do not produce a signal.
b) When touching the buttons, no buttons produce a signal.
2) In connection with indicators
a) At a certain digit, all or some segments do not light up.
b) At a certain digit, brightness is low.
c) Only one indicator does not light up.
d) The corresponding segments of all digits do not light up; or they continue to light up.
e) Wrong figure appears.
f) A certain group of indicators do not light up.
g) The figure of all digits flicker.
3) 2-3 Other possible troubles caused by defective control unit.
a) Buzzer does not sound or continues to sound.
b) Clock does not operate properly.
c) Cooking is not possible.
d) Proper temperature measurement is not obtained.
[14] Procedure N: JOG AND SWITCH UNIT TEST
If the display fails to clear when the STOP button (tact switch SW13) is depressed, first verify the wire harness is marking good contact, verify that the door sensing switch (stop
switch) operates properly; that is the contacts are closed when the door is closed and open
when the door is open. If the door sensing switch (stop switch) is good, disconnect the wire
harness that connects the Jog and Switch unit to the control unit and make sure the door
sensing switch is closed (either close the door or short the door sensing switch connecter).
Use the Jog and Switch unit matrix indicated on the control panel schematic and place a
jumper wire between the pins that correspond to the STOP button (tact switch SW13) marking momentary contact. If the control unit responds by clearing with a beep the Jog and
Switch unit is faulty and must be replaced. If the control unit does not respond, it is a faulty
and must be replaced. If a specific button does not respond, the above method may be used
(after clearing the control unit) to determine if the control unit or Jog and Switch unit is at
fault.
CARRY OUT 4R
CHECKS.
J-6 J-5 J-2 J-1
J-3J-4J-8 J-7J-12 J-9J-11 J-10J-13
VR1
RSW1
A
B
3
1
2
C
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
SW10
SW13
SW12
SW11
SWITCH UNIT

R939(W)
8 – 6
[15] Procedure O: RELAY TEST
CARRY OUT 3D CHECKS.
Remove the outer case and check voltage between Pin Nos. 1 and 3 of the 4 pin connector (E) on the control unit with an A.C. voltmeter. The meter
should indicate 230 volts, if not check oven circuit.
Relay Test
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation, grill operation, convection operation or dual operation.
DC. voltage indicated ................................... Defective relay.
DC. voltage not indicated ............................. Check diode which is connected to the relay coil. If diode is good, control unit is defective.
CARRY OUT 4R
CHECKS.
[16] Procedure P: PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE
PRINTED WIRING BOARD (PWB) IS OPEN
To protect the electronic circuits, this model is provided with a fine foil pattern added to the input circuit on the PWB, this foil pattern acts as a fuse. If
the foil pattern is open, follow the troubleshooting guide given below for repair.
Problem: POWER ON, indicator does not light up.
CARRY OUT 3D
CHECKS.
NOTE: *At the time of these repairs, make a visual inspection of the varistor for burn-
ing damage and examine the transformer with tester for the presence of layer
short circuit (check primary coil resistance).
If any abnormal condition is detected, replace the power unit.
CARRY OUT 4R
CHECKS.
RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS
RY1 APPROX. 18.0V D.C. Oven lamp / Turntable motor
RY2 APPROX. 18.0V D.C. High voltage transformer
RY3 APPROX. 24.0V D.C. Grill (Top) heating element
RY4 APPROX. 24.0V D.C. Convection heating element
RY5 APPROX. 24.0V D.C. Fan motor
RY6 APPROX. 24.0V D.C. Touch control transformer
RY7 APPROX. 24.0V D.C. Convection motor
RY8 APPROX. 24.0V D.C. Damper motor
STEPS OCCURRENCE CAUSE OR CORRECTION
1
The rated AC voltage is not present between Pin No. 1 and 3 of the 4-pin
connector (E).
Check supply voltage and oven power cord.
2 The rated AC voltage is present at primary side of low voltage transformer.
Low voltage transformer or secondary circuit defective.
Check and replace power unit.
3 Only pattern at “a” is broken. *Insert jumper wire J1 and solder.
4 Pattern at “a” and “b” are broken.
Replace power unit. (CARRY OUT 3D
CHECKS BEFORE
REPAIR)
(J1)
(J2)
9
1
7
CN-E
CN - A
VRS1
a
c
d
b

R939(W)
9 – 1
R939(W)
Service Manual
CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY
[1] OUTLINE OF TOUCH CONTROL PANEL
The control section consists of the following units as shown in the control panel circuit.
(1) Jog and Switch Unit
(2) Control Unit (The Control unit consists of Power unit and CPU unit.)
The principal functions of these units and signals communicated
among them are explained below.
1. Jog and Switch Unit
1) Tact switch circuit
The jog and switch unit is composed of a matrix, signals generated
in the LSI are sent to the jog and switch unit from P10, P11, P12,
P13, P14, P15, P16 and P17. When a tact switch pad is touched, a
signal is completed through the jog and switch unit and passed
back to the LSI through P70, P71, P72 and P73 to perform the
function that was requested.
2) Encoder
The encoder converts the signal generated by LSI into the pulse
signal, and the pulse signal is returned to the LSI.
3) Potentiometer circuit
The circuit makes setting of the cooking mode by variable resistance.
2. Control Unit
Control unit consists of LSI, power source circuit, synchronizing signal
circuit, ACL circuit, buzzer circuit, relay circuit, temperature measurement circuit, indicator circuit and back light circuit.
1) LSI
This LSI controls the temperature measurement signal, tact switch
strobe signal, relay driving signal for oven function and indicator
signal.
2) Power Source Circuit
This circuit generates voltage necessary in the control unit.
3) Synchronizing Signal Circuit
The power source synchronizing signal is available in order to compose a basic standard time in the clock circuit. It accompanies a
very small error because it works on commercial frequency.
4) ACL
A circuit to generate a signal which resets the LSI to the initial state
when power is supplied.
5) Buzzer Circuit
The buzzer is responsive to signals from the LSI to emit audible
sounds (key touch sound and completion sound).
6) Door Sensing Switch (Stop Switch)
A switch to “tell” the LSI if the door is open or closed.
7) Relay Circuit
To drive the magnetron, grill heating element, convection heating
element, convection motor, fan motor, turntable motor, damper
motor, touch control transformer and light the oven lamp.
8) Back Light Circuit
A circuit to drive the back light (Light emitting diodes LD10 - LD19).
9) Indicator Circuit
This circuit consists 40-segments and 16-common electrodes using
a Liquid Crystal Display.
The Liquid Crystal Display (LCD) is drive by LCD driver IC3.
10)Temperature Measurement Circuit: (OVEN THERMISTOR)
The temperature in the oven cavity is sensed by the thermistor. The
variation of resistance according to sensed temperature is detected
by the temperature measurement circuit and the result applied to
LSI. The LSI uses this information to control the relay and display
units.
11)Damper Switch
A switch to tell the LSI if the damper is open or close.
[2] SERVICING FOR TOUCH CONTROL PANEL
1. Precautions for Handling Electronic Components
This unit uses CMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should be strictly followed.
CMOS LSI have extremely high impedance at its input and output terminals. For this reason, it is easily influenced by the surrounding high
voltage power source, static electricity charge in clothes, etc., and
sometimes it is not fully protected by the built-in protection circuit.
In order to protect CMOS LSI.
1) When storing and transporting, thoroughly wrap them in aluminium
foil. Also wrap PW boards containing them in aluminium foil.
2) When soldering, ground the technician as shown in the figure and
use grounded soldering iron and work table.
2. Servicing of Touch Control Panel
We describe the procedures to permit servicing of the touch control
panel of the microwave oven and the precautions you must take when
doing so. To perform the servicing, power to the touch control panel is
available either from the power line of the oven itself or from an external power source.
1. Servicing the touch control panel with power supply of the
oven:
CAUTION: THE HIGH VOLTAGE TRANSFORMER OF THE MICRO-
WAVE OVEN IS STILL LIVE DURING SERVICING AND
PRESENTS A HAZARD.
Therefore, before checking the performance of the touch control
panel,
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) Disconnect the leads to the primary of the power transformer.
5) Ensure that these leads remain isolated from other components
and oven chassis by using insulation tape.
Symbol Voltage Application
VC -5.2V LSI(IC1)
appro x. 1M o hm

R939(W)
9 – 2
6) After that procedure, re-connect the power supply cord.
After checking the performance of the touch control panel,
1) Disconnect the power supply cord.
2) Open the door and block it open.
3) Re-connect the leads to the primary of the power transformer.
4) Re-install the outer case (cabinet).
5) Re-connect the power supply cord after the outer case is installed.
6) Run the oven and check all functions.
a) On some models, the power supply cord between the touch
control panel and the oven itself is so short that the two can't be
separated. For those models, check and repair all the controls
(sensor-related ones included) of the touch control panel while
keeping it connected to the oven.
b) On some models, the power supply cord between the touch
control panel and the oven proper is long enough that they may
be separated from each other. For those models, therefore, it is
possible to check and repair the controls of the touch control
panel while keeping it apart from the oven proper; in this case
you must short both ends of the door sensing switch (on PWB)
of the touch control panel with a jumper, which brings about an
operational state that is equivalent to the oven door being
closed. As for the sensor-related controls of the touch control
panel, checking them is possible if the dummy resistor(s) with
resistance equal to that of the controls are used.
2. Servicing the touch control panel with power supply from an
external power source:
Disconnect the touch control panel completely from the oven
proper, and short both ends of the door sensing switch (on PWB) of
the touch control panel, which brings about an operational state
that is equivalent to the oven door being closed. Connect an external power source to the power input terminal of the touch control
panel, then it is possible to check and repair the controls of the
touch control panel; it is also possible to check the sensor-related
controls of the touch control panel by using the dummy resistor(s).
3. Servicing Tools
Tools required to service the touch control panel assembly.
1) Soldering iron: 60W
(It is recommended to use a soldering iron with a grounding terminal.)
2) Oscilloscope: Single beam, frequency range: DC - 10MHz type or
more advanced model.
3) Others: Hand tools
4. Other Precautions
1) Before turning on the power source of the control unit, remove the
aluminium foil applied for preventing static electricity.
2) Connect the connector of the key unit to the control unit being sure
that the lead wires are not twisted.
3) After aluminium foil is removed, be careful that abnormal voltage
due to static electricity etc. is not applied to the input or output terminals.
4) Attach connectors, electrolytic capacitors, etc. to PWB, making
sure that all connections are tight.
5) Be sure to use specified components where high precision is
required.

R939(W)
11 – 1
R939(W)
Service Manual
CHAPTER 11. COMPONENT REPLACEMENT AND ADJUSTMENT PROCE-
DURE
[1] BEFORE OPERATING
Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in severe, possibly fatal,
electric shock.
(Example)
High Voltage Capacitor, High Voltage Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage fuse, High Voltage Harness etc..
WARNING:
Avoid possible exposure to microwave energy. Please follow the instructions below before operating
the oven.
1) Disconnect the power supply cord.
2) Visually check the door and cavity face plate for damage (dents,
cracks, signs of arcing etc.).
Carry out any remedial work that is necessary before operating the
oven.
Do not operate the oven if any of the following conditions exist;
1) Door does not close firmly.
2) Door hinge, support or latch hook is damaged.
3) The door gasket or seal is damaged.
4) The door is bent or warped.
5) There are defective parts in the door interlock system.
6) There are defective parts in the microwave generating and transmission assembly.
7) There is visible damage to the oven.
Do not operate the oven:
1) Without the RF gasket (Magnetron).
2) If the wave guide or oven cavity are not intact.
3) If the door is not closed.
4) If the outer case (cabinet) is not fitted.
To prevent an electric shock, take the following manners.
1. Before wiring,
1) Disconnect the power supply cord.
2) Open the door and block it open.
3) Discharge the high voltage capacitor and wait for 60 seconds.
2. Don't let the wire leads touch to the following parts;
1) High voltage parts:
Magnetron, High voltage transformer, High voltage capacitor
and High voltage rectifier assembly.
2) Hot parts:
Grill heating element, Convection heating element, Oven lamp,
Magnetron, High voltage transformer and Oven cavity.
3) Sharp edge:
Bottom plate, Oven cavity, Waveguide flange, Chassis support
and other metallic plate.
4) Movable parts (to prevent a fault)
Fan blade, Fan motor, Switch, Turntable motor, Convection
motor, convection fan and cooling fan.
3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector certainly until its pin is locked.
And make sure that the wire leads should not come off even if the
wire leads is pulled.
5. To prevent an error function, connect the wire leads correctly, referring to the Pictorial Diagram.
Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any of the following removal procedures:
[2] OUTER CASE REMOVAL
To remove the outer case, procedure as follows.
1. Disconnect the oven from power supply.
2. Open the oven door and wedge it open.
3. Remove the one (1) screw holding the air duct to the oven cavity
rear plate.
4. Remove the air duct.
5. Remove the nine (9) screws from rear and along the side edge of
case.
6. Slide the entire case back about 3 cm to free it from retaining clips
on the cavity face plate.
7. Lift the entire case from the oven.
8. Discharge the H.V. capacitor before carrying out any further work.
9. Do not operate the oven with the outer case removed.
NOTE: Step 1, 2 and 8 form the basis of the 3D
checks.
CAUTION: DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE
TOUCHING ANY OVEN COMPONENT OR WIRING.
[3] HIGH VOLTAGE COMPONENTS REMOVAL
(HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY)
To remove the components, proceed as follows.
1. CARRY OUT 3D
CHECKS.
2. Disconnect the filament lead of the high voltage transformer and
the high voltage wire of the high voltage transformer from the high
voltage capacitor.
3. Disconnect the high voltage wire from the magnetron.
WARNING AGAINST HIGH VOLTAGE:
WARNING FOR WIRING

R939(W)
11 – 2
4. Remove one (1) screw holding earth side terminal of the high voltage rectifier assembly to the base plate through the capacitor
holder.
5. Release the capacitor holder from the base plate.
6. Remove the high voltage capacitor from the capacitor holder.
7. Disconnect the high voltage rectifier assembly from the high voltage capacitor.
8. Now, the high voltage rectifier assembly and the high voltage
capacitor should be free.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTIFIER
ASSEMBLY, ENSURE THAT THE CATHODE (EARTH)
CONNECTION IS SECURELY FIXED TO THE BASE
PLATE THROUGH THE CAPACITOR HOLDER WITH AN
EARTHING SCREW.
[4] HIGH VOLTAGE TRANSFORMER REMOVAL
To remove the components, proceed as follows.
1. CARRY OUT 3D
CHECKS.
2. Disconnect the main wire harness from the high voltage transformer.
3. Disconnect the filament leads and high voltage wire of high voltage
transformer from high voltage capacitor and the magnetron.
4. Remove the two (2) screws holding the transformer to the base
plate.
5. Remove the transformer.
6. Now the high voltage transformer is free.
[5] MAGNETRON REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. wire and filament lead of the transformer from
the magnetron.
3. Carefully remove two (2) screws holding the magnetron to the
waveguide, when removing the screws hold the magnetron to prevent it from falling.
4. Remove the one (1) screw holding the magnetron to the chassis
support.
5. Remove the magnetron from the waveguide with care so the magnetron antenna is not hit by any metal object around the antenna.
6. Now, the magnetron is free.
CAUTION: CAUTION: WHEN REPLACING THE MAGNETRON, BE
SURE THE R.F. GASKET IS IN PLACE AND THE MAGNETRON MOUNTING SCREWS ARE TIGHTENED
SECURELY.
[6] CONTROL PANEL ASSEMBLY REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads and the connectors from the power unit.
3. Remove the one (1) screw holding the control panel to the oven
cavity face plate.
4. Remove the one (1) screw holding the earth wire to the oven cavity
face plate.
5. Lift up the control panel assembly and pull it forward.
Now the control panel assembly is free.
Jog and Switch unit
6. Disconnect the connector CN-G from the CPU unit.
7. Remove the four (4) screws holding the power unit to the control
panel.
8. Remove the one (1) screw holding the LCD holder to the control
panel.
9. Remove the control unit assembly (CPU unit and Power unit) from
the control panel.
10.Remove the seven (7) screws holding the jog and switch unit to the
control panel.
11.Remove the jog and switch unit from the control panel.
12.Now, the jog and switch unit is free.
[7] FAN MOTOR REREPLACEMENT
1. REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the one (1) screw holding the noise filter to the chassis
support.
3. Release the noise filter from the tabs of the fan duct.
4. Remove the three(3) screw holding the chassis support to the oven
cavity front flange, back plate, and the magnetron.
5. Remove the chassis support from the oven cavity.
6. Disconnect the wire leads from the fan duct.
7. Remove the one (1) screw holding the fan duct to the back plate.
8. Release the tabs of the fan duct from back plate.
9. Remove the fan duct from the oven.
10.Remove the fan blade from the fan motor shaft according to the following procedure.
i) Hold the edge of the rotor of the fan motor by using a pair of
groove joint pliers.
CAUTION: • Make sure that no swarf from the rotor enters the gap
between the rotor & stator of the fan motor.
• Avoid touch the coil of the fan motor with the pliers as
the coil may become cut or damaged.
• Avoid deforming the bracket whilst using the pliers.
ii) Remove the fan blade assembly from the shaft of the fan motor
by pulling and rotating the fan blade with your hand.
iii) Now, the fan blade is free.
CAUTION: Do not re-use the removed fan blade as the fixing hole may
be oversize.
11.Remove the two (2) screws holding the fan motor to the fan duct.
12.Now, the fan motor is free.
2. INSTALLATION
1. Install the fan motor to the fan duct with the two (2) screws and
nuts.
2. Install the fan blade to the fan motor shaft according to the following
procedure.

R939(W)
11 – 3
i) Hold the centre of the bracket which supports the shaft of the
fan motor on a flat table.
ii) Apply the screw lock tight into the hole (for shaft) of the fan
blade.
iii) Install the fan blade to the shaft of fan motor by pushing the fan
blade with a small, light weight, ball peen hammer or rubber
mallet.
CAUTION: • Do not hit the fan blade when installing because the
bracket may be deformed.
• Make sure that the fan blade rotates smoothly after
installation.
• Make sure that the axis of the shaft is not slanted.
3. Insert the tabs of the fan duct to the back plate.
4. Install the fan duct to the back plate with the one (1) screw.
5. Re-install the chassis support to the oven cavity with the four (4)
screws.
6. Install the noise filter to the fan duct and the chassis support with
the one (1) screw.
7. Re-connect the wire leads to the fan motor.
[8] TURNTABLE MOTOR REPLACEMENT
1. REMOVAL
1. Disconnect the oven from the power supply.
2. Remove the turntable and roller stay from the oven cavity.
3. Turn the oven over.
4. Cut the three (3) bridges holding the turntable motor cover to the
base plate with cutting pliers as shown in Figure C-1(a).
CAUTION: DO NOT DROP THE TURNTABLE MOTOR COVER INTO
THE OVEN AFTER CUTTING THE BRIDGES. BECAUSE
IT WILL DAMAGE THE WIRE LEADS OF THE MOTOR
AND IT IS DIFFICULT TO REMOVE IT OUT OF THE
OVEN.
5. Remove the turntable motor cover from the base plate.
6. Disconnect the wire leads from the turntable motor.
7. Remove the two (2) screws holding the turntable motor to the oven
cavity back plate.
8. Remove the turntable motor from the turntable motor angle. Now,
the turntable motor is free.
2. REINSTALL
1. Remove the any sharp edges on the turntable motor cover and the
base plate with the cutting pliers.
2. Re-install turntable motor by locating shaft onto coupling to the
oven cavity base plate with the two (2) screws.
3. Re-connect the wire leads to the turntable motor.
4. Insert the one (1) tab of the turntable motor cover into the slit of the
base plate as shown in Figure C-1(b).
5. Re-install the turntable motor cover to the base plate with the screw
(XHPS740P08K00) as shown in Figure C-1(b).
Figure C-1(a) Turntable Motor Cover Replacement
Figure C-1(b) Turntable Motor Cover reinstall
[9] CONVECTION MOTOR AND CONVECTION HEATING ELEMENT REMOVAL
1. CONVECTION UNIT ASSEMBLY REMOVAL
1. CARRY OUT 3D CHECKS.
Now, the outer case cabinet and the air duct should have been
removed.
2. Remove the one (1) screw holding the earth wire of the power supply cord to the back plate.
3. Release the power supply cord from the back plate.
4. Remove the two (2) screws holding the rear barrier to the base
plate.
5. Release the three (3) tabs of rear barrier from the base plate. And
remove the rear barrier.
6. Remove the one (1) screw holding the back plate to the base plate.
7. Remove the one (1) screw holding the chassis support to the back
plate.
8. Remove the one (1) screw holding the back plate to the air intake
duct.
Gap
Rotor
Bracket
Stator
Groove joint pliers
Coil
Shaft
Axis
Stator
Rotor
These are the positions
that should be pinched
with pliers.
Shaft
Table
Center of
bracket
Rear View
Side View
Cutting pliers
Turntable
motor cover
Bridges
Base plate
Turntable
motor cover
Tab
Screw: XHPS740P08K00
Base plate
Slit

R939(W)
11 – 4
9. Remove the two (2) screws holding the back plate to the convection duct.
10.Remove the back plate from the oven cavity.
11.Disconnect the wire leads from the convection heating elements,
convection motor and thermal cut-out.
12.Remove the one (1) screw holding the convection duct to the oven
cavity back plate from outside of the oven cavity.
13.Remove the seven (7) screws holding the convection duct to the
oven cavity back plate from inside of the oven cavity.
14.Lift up the convection duct and release the three (3) tabs of the
oven cavity back plate from the convection duct.
15.Now, the convection unit assembly is free.
2. CONVECTION HEATING ELEMENT REMOVAL
1. Remove the convection unit assembly refer to the “CONVECTION
UNIT ASSEMBLY REMOVAL”.
2. Remove the two (2) screws holding the convection heating element
to the convection duct.
3. Remove the one (1) screw holding the convection heater angle to
the convection duct.
4. Remove the one (1) screw holding the convection heater angle and
the air separate angle D to the convection duct.
5. Remove the one (1) screw holding the convection heater angle A to
the convection duct.
6. Remove the convection heating element from the convection duct.
7. Now, the convection heating element is free.
3. CONVECTION MOTOR REMOVAL
1. Remove the convection unit assembly refer to the “CONVECTION
UNIT ASSEMBLY REMOVAL”.
2. Remove the one (1) nut and washer from the convection motor
shaft.
3. Remove the convection fan from the convection motor shaft.
4. Remove the pipe from the convection motor shaft.
5. Remove the two (2) screws holding the convection motor angle to
the convection duct.
6. Remove the cooling fan from the convection motor shaft.
7. Remove the two (2) screws holding the convection motor to the
convection motor angle.
8. Remove the one (1) ring from the convection motor shaft.
9. Now, the convection motor is free.
[10] POSITIVE LOCK® CONNECTOR REMOVALPOSITIVE LOCK CONNECTOR REMOVALPOSITIVE LOCK CONNECTOR REMOVALPOSITIVE LOCK CONNECTOR REMOVALPOSITIVE
LOCK CONNECTOR REMOVALPOSITIVE LOCK CONNECTOR REMOVALPOSITIVE LOCK
CONNECTOR REMOVALPOSITIVE LOCK CONNECTOR REMOVALPOSITIVE LOCK CONNECTOR REMOVALPOSITIVE LOCK CONNECTOR REMOVALPOSITIVE LOCK CONNECTOR
REMOVALPOSITIVE LOCK CONNECTOR REMOVAL
1. CARRY OUT 3D CHECKS.
2. Push the lever of positive lock
®
connector.
3. Pull down on the positive lock
®
connector.
CAUTION: WHEN CONNECTING THE POSITIVE LOCK
®
CONNECTORS TO THE TERMINALS, CONNECT THE POSITIVE
LOCK
®
SO THAT THE LEVER FACES YOU.
Figure C-2. Positive lock®, connector
[11] OVEN LAMP SOCKET REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the wire leads as Positive lock
®
connector removal above.
3. Lift up the oven lamp from its retaining clips by pushing the tab of
the air intake duct.
4. Now, the oven lamp is free.
Figure C-3. Oven lamp
[12] POWER SUPPLY CORD REPLACEMENT
1. REMOVAL
1. CARRY OUT 3D CHECKS.
Terminal
Push
Pull down
1
2
Lever
Positive lock¨
connector
Lock
Socket
Bulb

R939(W)
11 – 5
2. Remove the one (1) screw holding the green/yellow wire to the
back plate.
3. Disconnect the leads of the power supply cord from the noise filter,
referring to the Figure C-4(a).
4. Release the power supply cord from the rear cabinet.
5. Now, the power supply cord is free.
Figure C-4 (a) Replacement of Power Supply Cord
2. REINSTALL
1. Insert the moulding cord stopper of power supply cord into the
square hole of the power angle, referring to the Figure C-4(b).
2. Install the earth wire lead of power supply cord to the back plate
with one (1) screw and tight the screw.
3. Connect the brown and blue wire leads of power supply cord to the
noise filter correctly, referring to the Pictorial Diagram.
Figure C-4(b). Power Supply Cord Replacement
[13] GRILL HEATING ELEMENTS REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect wire leads from the thermal cut-out (GRILL).
3. Remove the two (2)screws holding the two (2) terminals of the main
wire harness to the two (2) grill heating elements.
4. Remove the one (1) screw holding the exhaust duct to the oven
cavity top plate.
5. Remove the exhaust duct from the oven cavity top plate.
6. By pushing the two (2) tabs holding the grill reflector to the oven
cavity top plate, slide the grill reflector toward the magnetron. And
then lift up the grill reflector and remove it.
7. Remove the one (1) screw holding the grill heater angle to the grill
heater reflector.
8. Straighten the two (2) tabs of the grill heater angle and remove the
grill heater angle from the grill reflector.
9. Remove the two (2) screws holding the earth plate to the two (2)
grill heating elements.
10.Remove the two (2) grill heating elements from the grill reflector.
11.Now, the grill heating elements are free.
[14] MONITORED LATCH SWITCH, MONITOR SWITCH AND STOP SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly referring to “CONTROL
PANEL ASSEMBLY REMOVAL”.
3. Disconnect the leads from all switches.
4. Remove the two (2) screws holding the latch hook to the oven cavity.
5. Remove the latch hook.
6. Remove the switch(es) from the latch hook by pushing the retaining
tab backwards slightly and turning the switch(es) on the post.
7. Now the switch(es) is free
Figure C-5. Switches
[15] MONITORED LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT
1. Adjustment
If the monitored latch switch, stop switch and monitor switch do not
operate properly due to a mis-adjustment, the following adjustment
should be made.
1. CARRY OUT 3D
CHECKS.
2. Loosen the two (2) screws holding the latch hook to the oven cavity
front flange.
3. With the door closed, adjust the latch hook by moving it back and
forward or up and down. In and out play of the door allowed by the
latch hook should be less than 0.5 mm.
Power supply
cord
Back plate
Blue wire
Brown wire
Green/
Yellow wire
Noise filter
WHIT
RED
F2
F1
TP
N
L
TL
Power supply cord
Back plate
Moulding cord stopper
Square hole
SW2: Stop switch
SW3: Monitor switch
SW1: Monitored
latch switch
Tab
Post
Post

R939(W)
11 – 6
The horizontal position of the latch hook should be placed where
the monitor switch has activated with the door closed. The vertical
position of the latch hook should be placed where the monitored
latch switch and stop switch have activated with the door closed.
4. Secure the screws with washers firmly.
5. Make sure of the all switches operation. If the latch head has not
pushed the plungers of the monitor switch with door closed, adjust
the latch hook position. At that time, the latch head should have
pushed the plungers of the monitored latch switch and stop switch.
If the latch head has not pushed the plungers of the monitored latch
switch and stop switch with door closed, loose two (2) screws holding latch hook to oven cavity front flange and adjust the latch hook
position.
2. After adjustment, make sure of following.
1. 1. In and out play of door remains less than 0.5 mm when latched
position. First check the latch hook position, pushing and pulling
upper portion of the door toward the oven face. Then check the
lower latch hook position, pushing and pulling lower portion of the
door toward the oven face. Both results (play of the door) should be
less than 0.5mm.
2. The contacts (COM-NO) of the stop switch and the monitored latch
switch open within 1.8mm gap between right side of cavity face
plate and door when door is opened.
3. When the door is closed, the contacts (COM-NO) of the stop switch
close.
4. When the door is closed the contacts (COM-NC) of the monitor
switch and monitored latch switch open. And the contacts (COMNO) of their switches close.
5. Re-install outer case and check for microwave leakage around the
door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.)
Figure C-6 Latch Switches Adjustment
[16] DOOR REPLACEMENT
1. REMOVAL
1. Disconnect the oven from the power supply.
2. Push the door slightly.
3. Remove the door stopper from the choke cover.
4. Lift the door upwards.
5. Now, door assembly is free from oven cavity.
6. Insert an putty knife (thickness of about 0.5mm) into the gap
between the choke cover and door frame as shown in Figure C-7 to
free engaging parts.
7. Release choke cover from door panel.
8. Now choke cover is free.
Figure C-7. Door Disassembly
DOOR PANEL
9. Remove the eight (8) screws holding the door panel to the door
frame.
10.Now, door panel is free.
CAUTION: DO NOT DEFORM OR WARP THE TEETH OF COMB OF
THE DOOR PANEL TO PREVENT MICROWAVE RADIATION EMISSION FROM THE DOOR.
LATCH HEAD AND SPRING
11.Slide latch head upward and remove it from door frame with releasing latch spring from door frame and latch head.
12.Now, latch head and latch spring are free.
DOOR HANDLE AND FRONT DOOR GLASS
13.Remove the two (2) screws holding the door handle and the glass
stopper to the door frame.
14.Remove the door handle and the glass stopper from the door
frame.
15.Slide the front door glass leftward and then slide downwards to
release the tabs holding it.
16.Now, the front door glass is free
2. REINSTALLATION
1. Re-install the front door glass to the door frame as follows.
1) Insert the upper edge of the front door glass into the tabs of the
door frame.
2) Slide the front door glass downwards and insert the lower edge
of the front door glass into the tabs of the door frame.
3) Slide the front door glass rightwards and insert the right edge of
the front door glass into the tabs of the door frame.
2. Re-install the door handle and the glass stopper to the door frame
as follows.
1) Insert the door handle and the glass stopper to the door frame.
2) Hold the door handle and the glass stopper to the door frame
with the two (2) screws.
3. Re-install the latch spring to the latch head. Re-install the latch
spring to the door frame. Re-install latch head to door frame.
4. Re-install door panel to door frame.
Latch hook
Door
SW2: Stop switch
Latch
Heads
SW3: Monitor switch
SW1: Monitored
latch switch
Tab
Putty knife
Choke cover
Door frame
Door stopper

R939(W)
11 – 7
5. Hold the door panel to the door frame with eight (8) screws.
6. Re-install choke cover to door panel by clipping into position.
7. Locate door panel hinge pins into cavity hinge location holes.
8. Re-install the door stopper to the chock cover.
NOTE: After any service to the door;
1) Make sure that the monitor switch, monitored latch
switch and stop switch are operating properly. (Refer
to chapter “Test Procedures”.).
2) An approved microwave survey meter should be used
to assure compliance with proper microwave radiation
emission limitation standards. (Refer to Microwave
Measurement Procedure.)
3. After any service, make sure of the following:
1. Door latch heads smoothly catch latch hook through latch holes
and that latch head goes through centre of latch hole.
2. Deviation of door alignment from horizontal line of cavity face plate
is to be less than 1.0mm.
3. Door is positioned with its face pressed toward cavity face plate.
4. Check for microwave leakage around door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.)
NOTE: The door on a microwave oven is designed to act as an elec-
tronic seal preventing the leakage of microwave energy from
oven cavity during cook cycle. This function does not require
that door be air-tight, moisture (condensation)-tight or lighttight. Therefore, occasional appearance of moisture, light or
sensing of gentle warm air movement around oven door is not
abnormal and do not of themselves, indicate a leakage of
microwave energy from oven cavity.
Figure C-8. Door Replacement
Upper oven hinge
Lower oven
hinge
Lower
oven
hinge
Pin
Door
assembly
Pin

R939(W)
12 – 1
R939(W)
Service Manual
CHAPTER 12. MICROWAVE MEASUREMENT
After adjustment of door latch switches, monitor switch and door are completed individually or collectively, the following leakage test must be performed with a survey instrument and it must be confirmed that the result meets the requirements of the performance standard for microwave oven.
REQUIREMENT
The safety switch must prevent microwave radiation emission in excess of 5mW/cm
2
at any point 5cm or more from external surface of the oven.
PREPARATION FOR TESTING
Before beginning the actual test for leakage, proceed as follows;
1. Make sure that the test instrument is operating normally as specified in its instruction booklet.
Important:
Survey instruments that comply with the requirement for instrumentations as prescribed by the performance standard for microwave ovens must
be used for testing.
Recommended instruments are:
NARDA 8100
NARDA 8200
HOLADAY HI 1500
SIMPSON 380M
2. Place the oven tray into the oven cavity.
3. Place the load of 275 ±15ml of water initially at 20 ±5°C in the centre of the oven tray. The water container should be a low form of 600 ml beaker
with inside diameter of approx. 8.5cm and made of an electrically non-conductive material such as glass or plastic.
The placing of this standard load in the oven is important not only to protect the oven, but also to insure that any leakage is measured accurately.
4. Close the door and turn the oven ON with the timer set for several minutes. If the water begins to boil before the survey is completed, replace it
with 275ml of cool water.
5. Move the probe slowly (not faster that 2.5cm/sec.) along the gap.
6. The microwave radiation emission should be measured at any point of 5cm or more from the external surface of the oven.
Microwave leakage measurement at 5 cm distance
mW cm
2
mW cm
2

R939(W)
NO. PARTS CODE
PRICE
RANK
NEW
MARK
PAR T
RANK
[1] OVEN PARTS
ELECTRIC PARTS
!
!
*
!
!
CABINET PARTS
OVEN PARTS
* 4-4 DOVN-A024URK0 BU Oven cavity
* 4-31 PHOK-A002URF1 AT Latch hook
MISCELLANEOUS
SCREWS, NUTS AND WASHERS
C RC-QZA219WRE1 AS High voltage capacitor
CH RHET-A269WRZ1 AY Convection heating element
CM RMOTEA415WRZ1 BB Convection motor
DM RMOTDA269WRZ1 AP Damper motor
F1 QFS-BA012WRZZ AG Fuse 20A
FM RMOTEA002URE2 AV Fan motor
GH RHET-A231WRZ1 AU Grill heating element
MG RV-MZA264WRE1 BG Magnetron
OL RLMPTA066WRE1 AP Oven lamp
SW1 QSW-MA146WRZ1 AM Monitored latch switch
SW2 QSW-MA147WRZ1 AM Stop switch
SW3 QSW-MA146WRZ1 AM Monitor switch
SW4 QSW-MA147WRZ1 AM Damper switch
T RTRN-A016URE2 BL High voltage transformer
TC1 RTHM-A098WRE0 AK Thermal cut-out 125°C (MG)
TC2 RTHM-A109WRE0 AM Thermal cut-out 170°C (GRILL)
TC3 RTHM-A109WRE0 AM Thermal cut-out 170°C (CONV.)
TTM RMOTDA267WRZ1 AP Turntable motor
1-1 FH-DZA035WRE1 AS High voltage rectifier assembly
1-2 QACCVA004URE3 AT Power supply cord
1-3 FPWBFA309WRE4 AT Noise filter (F2: Fuse F8A)
1-4 RTRN-A529WRE1 AW TC transformer
1-5 FH-HZA075WRE0 AS Thermistor
2-1 GCABDA005URP1 BC Back plate
2-2 GCABUB051WRPZ BM Outer case cabinet [R-939(W)]
2-2 GCABUB052WRPZ BN Outer case cabinet [R-939(BK)] [R-939(IN)]
2-3 GLEGPA057WRE2 AF Foot
2-4 GDAI-A003URP3 BA Base plate
4-1 PCUSUA312WRP0 AC Cushion
4-2 PCUSUA050URE0 AB Cushion
4-3 LANGFA002URP0 AL Cavity support angle
4-5 MCAMPA001URF1 AF Damper cam
4-6 LANGTA009URP2 AG Damper angle
4-7 FFTA-A001URK0 AM Damper assembly
4-9 PDUC-A011URF1 AQ Air intake duct
4-10 PDUC-A014URP0 AH Exhaust duct
4-11 PSKR-A010URP0 AF Partition plate B
4-12 PDUC-A012URP0 AL Air duct
4-13 LANGQA017URP0 AF Grill heater angle
4-14 QTANNA001URP0 AC Earth plate
4-15 PREFHA001URP0 AS Grill reflector
4-16 LANG-A054WRP1 AK Convection heater angle
4-17 LANGQA308WRP1 AK Convection motor angle
4-18 NFANMA003URP0 AF Cooling fan
4-19 PDUC-A042URP0 AG Convection duct
4-20 PPIPFA005UR10 AK Pipe
4-21 PSKR-A013URP0 AG Air separate angle A
4-22 PSKR-A014URP0 AF Air separate angle B
4-23 PSKR-A015URP0 AF Air separate angle C
4-24 PSKR-A016URP0 AF
4-25 PSLDHA005URP0 AQ Rear heat cover
4-26 LANGQA018URP1 AM Convection heater angle A
4-27 PFPF-A002URE1 AL Heat insulating material
4-28 PSKR-A012URP0 AG Air separate angle E
4-29 PSKR-A308WRF1 AL Rear barrier
4-30 NFANMA004URP0 AG Convection fan
4-32 PDUC-A016URF1 AQ Fan duct
4-33 NFANJA038WRE0 AG Fan blade
4-34 GCOVHA002URP0 AG Bottom heater cover
4-35 LANGFA001URP1 AL Chassis support
4-36 NCPL-A040WRE2 AL Coupling
4-37 PCOVPA309WRE0 AF Waveguide cover
4-38 PFPF-A003URE2 AM Heat insulating material
4-39 PFILWA001URP0 AG Lamp filter
4-40 PPACGA101WRE0 AF O-ring
4-41 PSLDHA002URP3 AS Heater cover right
4-42 PSPAGA001WRE0 AB Vibration proof cushion
4-43 LBNDKA111WRP1 AG Capacitor holder
6-1 FROLPA060WRK0 AW Roller stay
6-2 NTNT-A040WRE0 AZ Turntable tray
6-10 LHLDKA008WRF1 AF P-clip
7-1 XHPS740P08K00 AB Screw: 4mm x 8mm
7-2 LX-EZA042WRE0 AB Special screw
7-3 XCBWW30P06000 AA Screw: 3mm x 6mm
7-4 XNEUW40-32000 AA Nut: 4mm x 3.2mm
7-5 XRES740-06000 AB Ring
Air separate angle D
DESCRIPTION
3

R939(W)
NO. PARTS CODE
PRICE
RANK
NEW
MARK
PAR T
RANK
[2] CONTROL PANEL AND DOOR PARTS
CONTROL PANEL PARTS
3-1 DPWB-A406DRKZ BR CPU unit
3-2 DPWBFA226URK0 BQ Power unit
3-3 DPWB-A411DRKZ BC Switch unit
3-4 HPNLCC006WRRZ AV Control panel [R-939(W)]
3-4 HPNLCC004WRRZ AV Control panel [R-939(BK)]
3-4 HPNLCC003WRRZ AX Control panel [R-939(IN)]
3-5 GMADIA163WRRZ AL Display window
3-6 JBTN-B367WRFZ AG Key button A [R-939(W)]
3-6 JBTN-B371WRTZ AG Key button A [R-939(BK)] [R-939(IN)]
3-7 JBTN-B368WRRZ AG Key button B [R-939(W)]
3-7 JBTN-B372WRRZ AG Key button B [R-939(BK)] [R-939(IN)]
3-8 JBTN-B369WRRZ AG Key button C [R-939(W)]
3-8 JBTN-B373WRRZ AG Key button C [R-939(BK)] [R-939(IN)]
3-9 JBTN-B370WRFZ AG Clear button [R-939(W)]
3-9 JBTN-B374WRTZ AH Clear button [R-939(BK)] [R-939(IN)]
3-10 JKNBKA766WRFZ AG Timer knob [R-939(W)]
3-10 JKNBKA769WRTZ AG Timer knob [R-939(BK)] [R-939(IN)]
3-11 JKNBKA767WRFZ AG Vari knob [R-939(W)]
3-11 JKNBKA770WRTZ AG Vari knob [R-939(BK)] [R-939(IN)]
3-12 MSPR-A006WREZ AF Switch spring
3-13 XEPS730P10X00 AA Screw : 3mm x 10mm
DOOR PARTS
* 5-1 CDORFB049WRKZ BX Door panel assembly [R-939(W)]
* 5-1 CDORFB051WRKZ Door panel assembly [R-939(BK)]
* 5-1 CDORFA050WRKZ BV Door panel assembly [R-939(IN)]
* 5-1-1 GCOVHA024URF0 AT Choke cover
* 5-1-2 DDORFB260WRKZ BF Door panel
* 5-1-3 GWAKPB045WRFZ AT Door frame [R-939(W)]
* 5-1-3 GWAKPB048WRFZ AT Door frame [R-939(BK)]
* 5-1-3 GWAKPA046WRTZ BD Door frame [R-939(IN)]
5-1-4 JHNDPA259WREZ AY Door handle [R-939(W)]
JHNDPA264WREZ BA Door handle [R-939(BK)] [R-939(IN)]
5-1-4
* 5-1-5 LSTPPA017URF0 AK Latch head
5-1-6 MSPRTA197WREZ AF Latch spring
5-1-7 PGLSPA668WREZ AX Front door glass [R-939(W)]
5-1-7 PGLSPA670WREZ BA Front door glass [R-939(BK)] [R-939(IN)]
5-1-8 XEBS730P06000 AC Screw : 3mm x 6mm
5-1-9 JHNDPA260WRFZ AH Handle cover [R-939(W)]
5-1-9 JHNDPA263WRFZ AN Handle cover [R-939(BK)] [R-939(IN)]
5-1-10 JHNDPA261WRFZ AG Handle base [R-939(W)]
5-1-10 JHNDPA262WRFZ AR Handle base [R-939(BK)] [R-939(IN)]
5-1-11 XBTS740P44XS0 AC Screw : 4mm x 44mm
5-2 LSTPPA018URF0 BB Door stopper
MISCELLANEOUS
6-3 PSRA-A025WRP1 AY Baking tray
6-4 FAMI-A001URK1 AT High rack
6-5 FAMI-A002URK1 AT Low rack
6-6 TLABMB127WRRZ AL Menu label
6-7 TCADCA896WRRZ AP Operation Manual with Cook book
6-8 FW-VZA104URE2 BD Main harness
6-9 FW-VZA074URE4 AN Stop switch harness
6-11 TCAUHA024URR0 AE Caution label [R-939(BK)] [R-939(IN)]
6-12 TINS-A703WRRZ AM Quick start guide
6-13 FAMI-A003URK1 AW Square rack [R-939(BK)]
6-14 PSRA-A001URH0 AZ Square tray [R-939(BK)]
DESCRIPTION
5

R939(W)
INDEX
PARTS CODE No.
[ C ]
CDORFA050WRKZ 2-5-1 BV
CDORFB049WRKZ 2-5-1 BX
CDORFB051WRKZ 2-5-1
[ D ]
DDORFB260WRKZ 2-5-1-2 BF
DOVN-A024URK0 1-4-4 BU
DPWB-A406DRKZ 2-3-1 BR
DPWB-A411DRKZ 2-3-3 BC
DPWBFA226URK0 2-3-2 BQ
[ F ]
FAMI-A001URK1 2-6-4 AT
FAMI-A002URK1 2-6-5 AT
FAMI-A003URK1 2-6-13 AW
FFTA-A001URK0 1-4-7 AM
FH-DZA035WRE1 1-1-1 AS
FH-HZA075WRE0 1-1-5 AS
FPWBFA309WRE4 1-1-3 AT
FROLPA060WRK0 1-6-1 AW
FW-VZA074URE4 2-6-9 AN
FW-VZA104URE2 2-6-8 BD
[ G ]
GCABDA005URP1 1-2-1 BC
GCABUB051WRPZ 1-2-2 BM
GCABUB052WRPZ 1-2-2 BN
GCOVHA002URP0 1-4-34 AG
GCOVHA024URF0 2-5-1-1 AT
GDAI-A003URP3 1-2-4 BA
GLEGPA057WRE2 1-2-3 AF
GMADIA163WRRZ 2-3-5 AL
GWAKPA046WRTZ 2-5-1-3 BD
GWAKPB045WRFZ 2-5-1-3 AT
GWAKPB048WRFZ 2-5-1-3 AT
[ H ]
HPNLCC003WRRZ 2-3-4 AX
HPNLCC004WRRZ 2-3-4 AV
HPNLCC006WRRZ 2-3-4 AV
[ J ]
JBTN-B367WRFZ 2-3-6 AG
JBTN-B368WRRZ 2-3-7 AG
JBTN-B369WRRZ 2-3-8 AG
JBTN-B370WRFZ 2-3-9 AG
JBTN-B371WRTZ 2-3-6 AG
JBTN-B372WRRZ 2-3-7 AG
JBTN-B373WRRZ 2-3-8 AG
JBTN-B374WRTZ 2-3-9 AH
JHNDPA259WREZ 2-5-1-4 AY
JHNDPA260WRFZ 2-5-1-9 AH
JHNDPA261WRFZ 2-5-1-10 AG
JHNDPA262WRFZ 2-5-1-10 AR
JHNDPA263WRFZ 2-5-1-9 AN
JHNDPA264WREZ 2-5-1-4 BA
JKNBKA766WRFZ 2-3-10 AG
JKNBKA767WRFZ 2-3-11 AG
JKNBKA769WRTZ 2-3-10 AG
JKNBKA770WRTZ 2-3-11 AG
[ L ]
LANG-A054WRP1 1-4-16 AK
LANGFA001URP1 1-4-35 AL
LANGFA002URP0 1-4-3 AL
LANGQA017URP0 1-4-13 AF
LANGQA018URP1 1-4-26 AM
LANGQA308WRP1 1-4-17 AK
LANGTA009URP2 1-4-6 AG
LBNDKA111WRP1 1-4-43 AG
LHLDKA008WRF1 1-6-10 AF
LSTPPA017URF0 2-5-1-5 AK
LSTPPA018URF0 2-5-2 BB
LX-CZA001URE0 1-7-16 AC
LX-EZA042WRE0 1-7-2 AB
[ M ]
MCAMPA001URF1 1-4-5 AF
MSPR-A006WREZ 2-3-12 AF
MSPRTA197WREZ 2-5-1-6 AF
[ N ]
NCPL-A040WRE2 1-4-36 AL
NFANJA038WRE0 1-4-33 AG
NFANMA003URP0 1-4-18 AF
NFANMA004URP0 1-4-30 AG
PRICE
RANK
NEW
MARK
PAR T
RANK
PARTS CODE No.
NTNT-A040WRE0 1-6-2 AZ
[ P ]
PCOVPA309WRE0 1-4-37 AF
PCUSUA050URE0 1-4-2 AB
PCUSUA312WRP0 1-4-1 AC
PDUC-A011URF1 1-4-9 AQ
PDUC-A012URP0 1-4-12 AL
PDUC-A014URP0 1-4-10 AH
PDUC-A016URF1 1-4-32 AQ
PDUC-A042URP0 1-4-19 AG
PFILWA001URP0 1-4-39 AG
PFPF-A002URE1 1-4-27 AL
PFPF-A003URE2 1-4-38 AM
PGLSPA668WREZ 2-5-1-7 AX
PGLSPA670WREZ 2-5-1-7 BA
PHOK-A002URF1 1-4-31 AT
PPACGA101WRE0 1-4-40 AF
PPIPFA005UR10 1-4-20 AK
PREFHA001URP0 1-4-15 AS
PSKR-A010URP0 1-4-11 AF
PSKR-A012URP0 1-4-28 AG
PSKR-A013URP0 1-4-21 AG
PSKR-A014URP0 1-4-22 AF
PSKR-A015URP0 1-4-23 AF
PSKR-A016URP0 1-4-24 AF
PSKR-A308WRF1 1-4-29 AL
PSLDHA002URP3 1-4-41 AS
PSLDHA005URP0 1-4-25 AQ
PSPAGA001WRE0 1-4-42 AB
PSRA-A001URH0 2-6-14 AZ
PSRA-A025WRP1 2-6-3 AY
[ Q ]
QACCVA004URE3 1-1-2 AT
QFS-BA012WRZZ 1-F1 AG
QSW-MA146WRZ1 1-SW1 AM
" 1-SW3 AM
QSW-MA147WRZ1 1-SW2 AM
" 1-SW4 AM
QTANNA001URP0 1-4-14 AC
[ R ]
RC-QZA219WRE1 1-C AS
RHET-A231WRZ1 1-GH AU
RHET-A269WRZ1 1-CH AY
RLMPTA066WRE1 1-OL AP
RMOTDA267WRZ1 1-TTM AP
RMOTDA269WRZ1 1-DM AP
RMOTEA002URE2 1-FM AV
RMOTEA415WRZ1 1-CM BB
RTHM-A098WRE0 1-TC1 AK
RTHM-A109WRE0 1-TC2 AM
" 1-TC3 AM
RTRN-A016URE2 1-T BL
RTRN-A529WRE1 1-1-4 AW
RV-MZA264WRE1 1-MG BG
[ T ]
TCADCA896WRRZ 2-6-7 AP
TCAUHA024URR0 2-6-11 AE
TINS-A703WRRZ 2-6-12 AM
TLABMB127WRRZ 2-6-6 AL
[ X ]
XBPWW30P05K00 1-7-12 AA
XBTS740P44XS0 2-5-1-11 AC
XCBWW30P06000 1-7-3 AA
XEBS730P06000 2-5-1-8 AC
XEPS730P10X00 2-3-13 AA
XEPS740P25000 1-7-7 AB
XHPS730P06000 1-7-8 AB
XHPS740P06000 1-7-10 AB
XHPS740P08K00 1-7-1 AB
XHTS740P08RV0 1-7-15 AG
XHTWW40P08000 1-7-13 AC
XJBS730P16000 1-7-14 AC
XJPS740P10X00 1-7-9 AB
XNEUW40-32000 1-7-4 AA
XOTS740P10000 1-7-17 AB
XOTWW40P10000 1-7-11 AA
XRES740-06000 1-7-5 AB
XWSUW40-10000 1-7-6 AA
PRICE
RANK
NEW
MARK
PART
RANK
6