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R-9370

Sharp R-9370 Service Manual

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Page 1
R-9370
SHARP SERVICE MANUAL
S7607R9370J//
MICROWAVE OVEN
MODEL
R-9370
In the interests of user-safety the set should be restored to its original condition and only #parts identical to those specified be used.
This is a supplemental Service Manual for R-9370. This model is quite similar to Base Model R-9360. Model R-9370 has Reheat Sensor function in addition, compared to its base model R-9360. Use this supplemental manual together with the Base Service Manual.
Refer to the Base Service Manual for complete operation, service information, etc.
cc TABLE OF CONTENTS
Y
Page
FOREWORD
......................................................................
1
CAUTION, MICROWAVE RADIATION
...................................................
1
THUMB INDEX
...................................................................
1
PRODUCT DESCRIPTION ............................................................
2
OPERATING INSTRUCTIONS
.........................................................
3
SERVICING .......................................................................
6
TOUCH CONTROL PANEL ASSEMBLY.
.................................................
8
MICROWAVE MEASUREMENT
....................................................... 21
SCHEMATIC DIAGRAM
............................................................
22
PICTORIAL DIAGRAM
.............................................................
22
CONTROL PANEL CIRCUIT
.........................................................
23
PRINTED WIRING BOARD
..........................................................
24
PARTS LIST .................................................................... 25
PACKING AND ACCESSORIES..
.....................................................
34
SHARP CORPORATION
Page 2
R-9370
SERVICE MANUAL
SHARP
MICROWAVE OVEN
R-9370
FOREWORD
This Manual has been prepared to provide Sharp Service Personnel with complete Operation and Service information for the Sharp Microwave Oven.
This model is quite similar to Base Model R-9360. (Ref. No. SO506R936OJ//).
It is recommended that service personnel carefully study the entire text of two Manuals (Base manual and this manual), so they will be qualified to render satisfactory customer service.
CAUTION
MICROWAVE RADIATION
Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave
generating devices if it is improperly used or connected, All input and output microwave connections, waveguides, flanges, and gaskets must be secured. Never operate the ‘device without a microwave energy absorbing load attached. Never look into an open waveguide or antenna while the device is energized.
SHARP CORPORATION
OSAKA, JAPAN
Page 3
R-9370
PRODUCT DESCRIPTION
EXPLANATION OF MICROWAVE COOKING
‘Xhe Sharp Microwave Oven uses microwave energy to produce heat in the food to be cooked. Unlike conventional ovens microwave energy will cook foods without applying external heat.
Microwaves, which are short electromagnetic waves of RF
(radio frequency) energy, pass through materials such as glass, paper, china and most plastics. Materials such as metal and aluminum foil tend to reflect microwaves and may be used only as recommended in the cooking instructions.
Materials with a high moisture content, like most foods, will absorb microwave energy.
As the microwave energy at a fre­quency of 2450 Megahertz enters the food, the molecules align themselves with the energy. Because the microwaves are
changing polarity every half cycle, the food molecules are changing direction every half cycle or oscillating back and forth 4,900,000,000 times per second. This high speed oscil­lation causes friction between the molecules, thereby convert­ing the microwave energy to heat.
SPECIFICATIONS
ITEMS
Power requirements
DESCRIPTIONS
240v 50Hz Single phase, 3 wire earthed
Power consumption
Microwave output power
Case dimensions
Width
Height
Depth
Cooking cavity dimensions
Width Height Depth
Turntable diameter
Control complement
1.4kW
700W (2 litre water load)
622mm 382mm 476mm
406mm
248mm 422mm 395mm
Clock (l:OO- 12:59) Minute Timer (0- 99 minutes 99 seconds) Variable Cooking Mode Selector
Repetition Rate:
HIGH . . . . . . . . . . . . . . . . . . . . . . . . . Full power throughout the cooking time
MED HIGH . . . . . . . . . . . . . . . . . 24 sec. ON, 8 sec. OFF, approx. 70% of full power
MED . . . . . . . . . . . . . . . . . . . . . . . . . . 18 sec. ON, 14 sec. OFF, approx. 50% of full power
MED LOW
DEFROST . . . . . . . . . . . . . . . . . . . 12 sec. ON, 20 sec. OFF, approx. 30% of full power
LOW . . . . . . . . . . . . . . . . . . . . . . . . ..6 sec. ON, 26 sec. OFF, approx. 10% of full power
Auto Start Cooking Instant Cooking Compu. Defrost Cooking
Reheat Sensor Cooking
Weight
Approx. 27kg
2
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R-9370
OPERATING INSTRUCTIONS
OPERATION OF AUTO-TOUCH” CONTROL PANEL
Your new Auto-Touch microwave oven uses a microprocessor, the electronic brain that provides the wide variety of cooking programmes which could not be achieved by conventional control methods. The operation of the oven is controlled by touching the appropriate pads arranged on the surface of the con­trol panel. The lighted digital readout will display the cooking time, Sensor Cook, or Compu Defrost set-
I
ting or time:of day or minute timer. Indicators show the variable cooking setting and cooking function you have programmed. An entry signal tone should be heard each time you touch the control panel to make a correct entry.
If you do not hear this sound,
1) You have not used enough pressure in touching the pad.
2) You have made more entries than the control panel will accept.
3) You have made an incorrect entry.
I
In addition to the entry signal tone, an audible signal will sound for approximately 2 seconds at the end
of the cooking cycle.
* Make sure the oven is plugged into a power point. When the oven is plugged in, the display show
[88:581,
flashing on and off each second. Touch the STOP/CLEAR pad: [“-?F] will appear. * You cannot programme the oven if the door is not closed firmly. * During cooking, the programme cannot be changed until the STOP/CLEAR pad is touched twice.
All functions are locked in to prevent accidental changes.
If food does not seem to be heating properly, check the indicator immediately below the lighted digital
display. Be sure the Variable Cooking Control is on the proper setting.
* If the electrical power supply to your microwave oven should be interrupted, the display will intermit-
tently show 185:88] after the power is reinstated. If this occurs during cooking, the programme will be erased. The time of day will be also erased. Simply reset the clock for the correct time of day.
Auto-TouchTM Control Panel
I
7
INDICATORS LIGHTED DIGITAL DISPLAY
CMP” MfO Low MI0 “IL”
Shows readout of cooking time, cooking instruction or time of day.
7 3
3
9
r
NUMBER PADS
Touch to enter cooking times, clock time or weight of food.
REHEAT SENSOR PAb
Touch to reheat food.
COMPU DEFROST PAD
Touch to select Compu Defrost settings.
VARIABLE COOKING CONTROL PADS
Touch to select microwave power-setting. If not touched, HIGH is automatically selected.
STOP/CLEAR PAD
Touch to erase during programming. Touch once to stop operation of oven during cooking; touch twice to cancel cooking program.
AUTO START/CLOCK PAD
Touch to set clock or auto start time.
START PAD
Touch to start oven.
INSTANT COOK PAD
Touch to cook for 1 minute at HIGH or increase by 1 minute mul­tiples during variable cooking.
TIMER/HOLD PAD
Touch to set minute timer or HOLD function.
3
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R-9370
Reheat Sensor
HOW ONE TOUCH REHEAT SENSOR WORKS
Sharp’s Electronic Sensory Processor is a semi-conductor device that detects the vapor (humidity) emit­ted from food as it heats. The Sensor adjusts cooking times and variable power for various foods and quantities. It takes the guesswork out of microwave heating.
HERE’S AN EXAMPLE OF HOW IT WORKS:
&cq
*‘Cg
, O%&.
0%
f
[ SENSOR j
kc
1. Broccoli at room temperature.
2. Heat Broccoli. Vapor is emitted 3. Sensor detects vapor and cal-
Vapor is emitted very slowly.
rapidly. culates cooking time and vari-
Before You Use REHEAT SENSOR
able power.
1. The oven should not be operated on Sensor Reheat immediately after plugging in the unit. Wait 5 minutes before using the Sensor Reheat.
2. The Reheat Sensor is designed to work best for reheating one to two servings of precooked foods. The Reheat Sensor may not work perfectly with all menus. Please refer to reheat chart for available menus.
3. Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any moisture with a dry cloth or paper towel.
4. Room temperature should not exceed 35OC.
5. Dense casseroles are difficult to heat with the Reheat Sensor and may be too cool. Stirring the cas­serole after heating will help to equalize temperatures.
6. If the Reheat Sensor has not detected the vapor of the food after 15 minutes, [E,c,c3,c] and
IRE-
-1 will appear in the display and the oven will shut off.
Selecting Foods
1. Reheat Sensor works with foods at normal storage temperature. For example, chicken pieces would be at refrigerator temperature and canned soup at room temperature.
2. A minimum quantity of a half cup should be heated when using the Reheat Sensor. Smaller quantites should be heated by time and variable power.
3. Should foods be cooler than desired, simpiy heat an additional minute or two using Instant Cook pad.
4. If a particular food is hotter than desired, consult your cookbook or cooking guide and choose time and variable power the next time the food is heated.
5. The arrangement of foods will affect heating results. Place the thickest parts of foods to the outside of the dish, where they will receive more microwave energy.
6. When possible, stir foods before eating.
Covering Foods
Foods should be covered with plastic wrap or casserole lid when using the Reheat Sensor. Other cover­ings may cause foods to overheat.
1. Casserole lid.
2. Plastic wraps. Use plastic wraps recommended for microwave cooking.
Cover dish loosely; fold excess wrap over side of dish. Do not create an air tight seal, follow procedure in chart.
Be careful when removing any covering to allow steam to escape away from you.
1. Casserole lid 2. Plastic wrap
Page 6
R-9370
I
I
/ To Use Reheat Sensor 1
To use the Reheat Sensor, open oven door, place food in oven, close door and touch the Reheat Sensor
pad. The REHEAT SENSOR pad must be touched within one minute after closing oven door or touching
the STOP/CLEAR pad.
+ Suppose you want to reheat vegetables.
-
Step
Procedure
Pad Order
I
1.
Touch REHEAT SENSOR pad.
I
REHEAT I
I I --
SENSOR 1
Display
SENSOR
ICOOK
and
They will be displayed con­tinuously.
The oven will start operating. When the food is hot as detected by the reheat sensor, all indicators will go out and an audible signal will sound. The time of day will reappear on the display.
NOTE: Avoid opening the oven door or touching STOP/CLEAR pad when ml m:--(EISTl is displayed.
If this occurs, -1 and IRE-1 (1 will appear and sensor heating will be interrupt­ed. To continue heating, touch STOP/CLEAR pad. -1 and (-1 I] indicator will go out. Select heating time and variable power level. Heating with the Reheat Sensor at this point may result in overheating.
Reheat Chart
FOOD QUANTITY
soup Dinner Plate Casserole Meat Sauce Canned Food Steak Chops Sliced Roast Beef Hamburger Patties Chicken Pieces
Fried Rice Hot Dog Sweet Fruit Pie
1-4 cups
1 serving
200-1ooog
200-800g
200-IOOOg
l-4 l-6
200-5oog
2-6
2-4 pieces
200-1ooog
l-2
1-4 pieces
UTENSIL
Casserole
Plate
I
Casserole
Mixing Bowl
1
1
Plate
Mixing Bowl
-
Plate’
I
COVER
Lid or Plastic Wrap
Plastic Wrap
Lid or Plastic Wrap
Plastic Wrap
Plastic Wrap
Plastic Wrap Paper Towel
No
5
Page 7
R-9370
SERVICING
TROUBLESHOOTING GUIDE
Note: For other Test Procedures, please refer to Service Manual for Base Model R-9360.
PROBLEM POSSIBLE CAUSE
TEST PROCEDURE OR
CORRECTION
SENSOR COOKING
Oven is in the sensor cooking con­dition but RH sensor does not end stage 1. of cooking cycle, cooking cycle or does not step cooking
cycle.
RH sensor open and/or short.
Procedure K.
Defective control unit.
Procedure K.
Open or loose wire connection to the above Check and repair wiring.’
-. components.
TEST PROCEDURES (CONT’D)
PROCEDURE
LETTER
COMPONENT TEST
J
KEY UNIT TEST
If the Indicator does not respond to touching a key Pad use the following matrix and place a jumper wire between the proper pin connections with the G (1 a-pin) cable disconnected from the control unit. If the indicator responds and oven goes into operation, the key unit is faulty. If there is no response, replace the control unit.
.
6
Page 8
R-9370
TEST PROCEDURES (CONT’D)
PROCEDURE
LETTER
COMPONENT TEST
K
REHEAT SENSOR TEST
Water Load Cooking Test
Check as follows:
(1) Fill 36 milliliters (1 oz) of tap water initially at 2O+l”C (68°F) in a 100 milliliter measuring cup (2) Place th
e container on the edge of turntable tray in the oven cavity. (3) Close the door, and touch “REHEAT SENSOR” pad. (4) The oven is in the sensor cooking condition. (5) Sensor cooking time should be 66+35 seconds.
Checking the Control Unit with Use of Dummy Resistor.
(1) Take the procedures according to the instructions in “Servicing of Touch Control Panel”.
Besides it is needed to connect the parts as shown in Fig. A to the connector (C) to enable checking of the REHEAT SENSOR.
(2) Check the sensor cook operation proceed as follows:
(2-l) Touch REHEAT SENSOR pad. (2-2) The control panel is in the sensor cooking operation. (2-3) After approximately 40 seconds, push plunger of MICRO switch.
This condition is same as judgement by REHEAT SENSOR.
(2-4) After approximately 3 seconds, cooking operation turns off, an audible signal will sound, and the
display will then revert to the time of day.
If the above is not case, the control unit is probably defective. If the above is proper, the REHEAT SENSOR is probably defective.
MICRO
SWITCH
Figure A. Sensor Dummy Resistor Circuit
Page 9
R-9370
TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL
The touch control section consists of the following units as shown in the block diagram.
(1) Key unit (2) Control unit Exchange of signals between each unit is indicated by the ar­rows in the block diagram.
The principal functions of these
units and the signals communicated among them are explained
below. l-l. Key Unit
The key unit is composed of a matrix, signals generated
in the LSI are sent to the key unit through P62, P63, P70 - P73. When a key pad is touched, a signal is com­pleted through the key unit and passed back to the LSI through PlO - P13 to perform the function that was requested.
l-2. Control Unit
Control unit consists of LSI, Power source circuit, Syn-
chronizing signal circuit, ACL circuit, Buzzer circuit,
Reheat sensor circuit and Indicator circuit.
1) Power Source Circuit This circuit generates voltage necessary in the control and indicator circuit, from the AC line voltage. In ad­dition, the synchronizing signal is available in order to compose a basic standard time in the clock circuit.
2) Synchronizing Signal Circuit The power source Synchronizing signal is available in order to compose a basic standard time in the clock ci rcu i t. It accompanies a very small error because it works on the commercial frequency.
3) LSI (IX2412YA) This LSI controls the reheat sensor signal, key touch and relay control signal for oven function, and control of the indicator circuit.
4) ACL A circuit to generate a signal which resets the LSI to the initial state when power is supplied.
5) Stop switch A switch to “tell” the LSI if the door is open or closed.
6) Buzzer The buzzer is responsive to signals from the LSI to emit noticing sounds (key touch sound and completion sound).
7) Relay Circuit
To drive the magnetron, fan motor, turntable motor and light oven lamp.
8) Reheat Sensor Circuit This circuit detects moisture of a food which is under cooking, to allow its automatic cooking.
9) Indicator Circuit This circuit consists of 6-digits, 13 segments display, five cooking mode indicators.
Page 10
R-9370
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Page 11
R-9370
3. DESCRIPTION OF LSI
LSI (ICl: lX2412YA) The I/O signals of the LSI are detailed in the following tables.
P30 P31 P32 P33 ACL CL1 ci2 P40 TEST P41 P42 P43 P50 P51 P52 P53
P60 P61 P62 P63 P70 P71 P72
P73 1 1
24
KT 1 25 1
58
l-i
57
IX2412YA
GND P23 P22 P21 P20 PA0 PA1 VR Vdisp PA2 PA3 PA4
PA5 PA6 PA7
PA8
PA9
AGND
P13
P12
Pll
PlO
PO3
PO2
PO1
PO0
P93
P92
P91
P90 P83 P82
Figure T-2. Relationship between pin Nos. and Signals (LSI: IX2412YA)
10
Page 12
R-9370
Pin No.
Signal
I/O
Description
1
P30
OUT
Segment data signals
The relation between signals and segments are as follows:
Signal
Segment
P20 . . , . . . . . . . . . . . d
P21 . . * . . . . , * . . . * . c
P22 , . . . , . . . . . . . . . b
P23 . . . . . . . . . . . . . . a
P30 . . . . . . . . . . . . . . e
p31 . . . . . .*, . , . . *, f
P32 . . . . . . . . . . . . . . g 1.68 msec.
P33 , . . . . , . . . . . . . . h
--- GND
~40 . . . . , . . . . . . . . . i
a
....-... DEFROST
~41 . . . . . . . . . . . . . . j
b
. -. - - - a. SENSOR
Segment
I-
Signal
P42 . . . . . . . . . . . . . . k
-27V
P31 OUT
P32
OUT
P33
OUT
ACL
IN
Auto-clear terminal
Signal is input to reset the LSI to the initial state when power is supplied. Temporarily set to “L” level the moment power is supplied, at this time the LSI is reset. Thereafter set at “H” level.
CL1
IN internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to CL2 terminal.
CL2 OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of CLl.
8
P41 OUT
Segment data signal.
Signal similar to P30.
9 TEST
IN Not used. Connected to VDD (--12V).
10 P40
OUT
Segment data signal.
Signal similar to P30.
11 P42 OUT
OUT
Signal for lighting of Power level and COMPU indicators.
12
13
P43
P50
Signal similar to P30.
OUT
Signal for lighting of COOK, AUTO and kg indicators.
Signal similar to P30.
14
P51 IN Terminal not used.
P52
151
IN
IN
IN
IN
OUT
Not used. Terminal for manufacture test.
Terminal not used.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to PlO - P13 terminal while one of G-l line keys on key matrix is touched.
OUT
Key strobe signal.
Signal applied to touch-key section. 4 pulse signal is input to PlO - P13 terminal while one of G-2 line keys on key matrix is touched.
16
P53
P60
P61
P62
17
18
19
T
11
Page 13
R-9370
Pin No.
Signal
I/O
Description
21 P70
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to PlO - P13 terminal while one of G-3 line keys on key matrix is touched.
22
P71
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to PlO - P13 terminal while one of G-4 line keys on key matrix is touched.
23
P72
24 P73
OUT
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to PlO
- P13 terminal while one of G-5 line keys on key matrix is
touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to PI0 - P13 terminal while one of G-6 line keys on key matrix is touched.
25
KT
26
KI
27 so
IN Terminal not used.
IN
OUT
Signal to sound buzzer.
A: Key touch sound.
0.12 sec.
6: Completion sound.
A. -//-
B
28 NC
29 VDD
30 P80
31 P81
32 GND
33 P82
34 P83
35 P90
36 P91
37 P92
38
P93
NC
IN
OUT
IN
IN
IN
OUT
OUT
OUT
OUT
OUT
Not used.
Power source voltage: -12V.
VDD Voltage of power source circuit input.
Terminal not used.
Connected to GND.
Terminal not used.
Used for initial balancing of the Reheat Sensor circuit.
12
Page 14
R-9370
Pin No.
Signal
I/O
Description
\
39
PO0
IN
RH sensor input.
This input is an analog input terminal from the RH sensor circuit, and connected to the A/D converter built into the LSI.
40
PO1
IN
Terminal to change the functions according to the Model.
By using the A/D converter contained in the LSI (lX2412YA), DC voltage in accordance with the Model in operation is applied to set up its function.
41
PO2
IN
42
PO3
IN
Not used. Connected to GND.
Terminal to change the functions according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the Model in operation is applied to set up its function.
43
PlO
IN Signal coming from touch-key.
When either one of G-l 1 line keys on keys on key matrix is touched, a corresponding signal
out of P70 - P73, P63 and P62 will be input into PlO.
When no key is touched, the signal is held at “L” level.
44
Pll
IN
45
P12 IN
Signal similar to PIO.
When either one of G-10 line keys on key matrix is touched, a corresponding signal will be
input Pll.
-
Signal similar to PIO.
When either one of G-9 line keys on key matrix is touched, a corresponding signal will be
input P12.
46
P13
IN Signal similar to PlO.
When either one of G-8 line keys on key matrix is touched, a corresponding signal will be input P13.
47
48
49
50
51
52
53
AGND
IN
Connected to GND.
PA9 OUT
Digit selection signal.
~ The relation between digit signal and digit are as follows:
PA8 OUT
Digit Signal Digit
PA7
OUT
PA4 . . . . . . . . . . . 1st
PA5 . . . . . . . . . . . 2nd
1.32 msec.
PA6 OUT
PA6 . . . . . . . . . . . 3rd
PA7 . . . . . . . . . . . 4th
PA4
PA5 OUT
PA8 . . . . . . . . . . . 5th
PA9 . . . . . . . . . . . 6th
T--------- ;;;”
PA4 OUT
Normally, one pulse is output in every I3 period, and input to the grid of the
PA5 n
Fluorescent Display.
PA6 1 .
PA7 1
PA8 1
PA9a ;:p,
1.32 msec.
13
Page 15
R-9370
Pin No.
Signal I/O
Description
54
PA3
OUT
*Oven lamp cooling fan motor and turn table motor driving signal (Square waveform:
50Hz).
To turn on and off the shut-off relay (RYl): The Square waveform voltage (50Hz) is delivered to the RYl driving circuit and RY2 control circuit.
20 msec.
t- -
-v-m- GND
-19v
During cooking or when door is
opened.
55
PA2
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2).
In HIGH operation, the signals holds “H” level during microwave cooking and “L” level
while not cooking.
In other cooking modes (HIGH, M-HIGH, MED, M.LOW, LOW) the
signal turns to “H” level and “L” level in repetition according to the power level.
HIGH J’
MED HIGH
p.n;;;.{
MED ~~-oF~~c
f
MED LOVVj-+f
LOW
32 sec.
cl
HOLD
--- L
56
Vdisp
IN Anode (segment) of Fluorescent Display light-up voltage: -27V.
Vp voltage of power source circuit input.
57
VR
IN Reference voltage input terminal.
A reference voltage applied to the A/D converter in the LSI. The reference voltage is generally maintained at -6.15V.
58 PA1
IN
Signal synchronized with commercial source frequency.
This is the basic timing for time processing of LSI (ICl: lX2412YA).
‘r;L
IT-r:
I I I
I
I
20 msec. I
‘1
14
Page 16
Pin No.
Signal
I/O
Description
59 ’ PA0
IN input signal which communicates the door open/close information to LSI.
Door closed:
“H” level signal (OV)
Door opened: “L” level signal (-12V)
60 P20 OUT
Segment data signals.
l3’ I
P21 OUT
- Signal similar to P30.
62 P22 OUT
63 P23
OUT
64 GND
IN
Connected to GND.
POWER SOURCE CIRCUIT
A power of AC 240V is applied to the primary winding of
smoothed by the electrolytic capacitor (C2) to become DC
transformer (Tl).
voltage VC. Then the voltage VC is delivered to the constant
The output voltage of the secondary winding of transformer
voltage circuit.
(Tl) is then full-wave rectified by the diode bridge (Dl) and
VDD (-l2V) is a voltage to be applied to the LSI.
Tl
Dl
POWER SUPPLY 240V 50Hz
To Relay Contact
+ c70
To Relay Circuit
f
Figure T-3. Power Source Circuit
15
Page 17
R-9370
SYNCHRONIZING SIGNAL CIRCUIT
At the secondary side of the power source circuit there is
to PA1 terminal of LSI. This voltage is referred to as a power
caused AC half-wave rectified voltage and it is applied via R7
sync. signal.
R7
58
>
11. - -
c PA1
LS I
J--\
i'"'
I
I
I
20.0 msec.
I
I--
-l
Figure T-4. 13 Circuit and Waveform
ACL CIRCUIT
By switching on power, charge current (il) is fed to C20 through R20 and generates throshold voltage (Vz).
If Vz exceeds the zener voltage of ZD20, ZD20 is turned on
and the current
2 flows. Thus, placing voltage on to the base
of transistor 020 and turning it on. A reset signals is obtained from the collector. C21: Noise filter capacitor.
GND,
a
*
v
w
v
I
1
Q20
--
j/z; + il
r
---1
I
I
=c20
I -
c21
t *
2020 ;
u
I
I
I
T
voD> fz- L---p-
(-12V)
RESET
GND
RESET
J
Figure T-5. ACL C
ircuit
16
Page 18
BUZZER CIRCUIT
The square waveform developed from T terminal of LSl is applied to the base of Q30 to turn on and off 030, and square
waveform voltage (2.5 kHz) is applied to SPI to generate buzzer sound.
SPl
I
I
I
(From LSL)
r T
1
I
<So Pin NO. 27
Figure T-6. Buzzer Circuit
RELAY CIRCUIT
While the unit is in cook,
“H” level signal is produced at
succession so that a current II is caused to turn on the control
PA2 terminal of LSI and also a pulse signal at PA3 terminal of
relay (RYI).
LSI. The pulse signal form PA3 terminal is applied to the rec- The “H” level signal from D6 terminal is applied to 080 which tifier circuit made up of Diodes DIOO and DlOl inside the hybrid IC (IC3) where it is made into DC signal to charge
is connected in series with QlOl, and current i2 made only when both Q80 and QlOl are turned on at the same time
ClOO. With Cl00 charged up, QIOO and 0101 turn on in
allowing the cook relay (RY2) to turn on.
R-9370
To Power !
Source Circait t
DTC114EA 2
080
r----7
4
I
“H”
55
I
PA2 vJ,
I
II /I
I nnnnnn
-I
I
DlOO
, I
R104
+c(- ,,
1
H
R103 I3101 Cl01
‘“” 15
R105
I
RlOl
--I-
1
J
IC3 : Hybrid IC
4
vz
Figure T-7. Relay Circuit
17
Page 19
R-9370
REHEAT SENSOR CIRCUIT
1. Operational Principle of Reheat Sensor
As shown in Fig. T-8,2 pieces of temperature sensitive resis-
and RH, are used in the detector of the reheat sensor. These temperature sensitive resistors are cased for protection. Fig. T-9 shows the basic circuit. The temperature sensitive resistor RH, is receiving approx. 52mA of current at all times, keeps itself heated to approx. 460°F (240°C). A minute current is applied to the temperature sensitive resis­tor RN to measure the ambient temperature.
VOUT (output voltage) in Fig. T-9 can be expressed as
follows.
RH
VOUT = - RN
lo l Rf
Where, lo is a constant current and Rf is a fixed resistance.
Therefore, VOUT will be the voltage in proportion to the resistance ratio between RH and RN. The temperature sensitive resistors RH and RN have a linear and positive characteristic against the temperature. Therefore, when the temperat;; is the only varying force with humidity being constant, R value at a constant evel.
r
becomes constant, keeping VOUT
When vapors are produced from the food, the RH resistor side is cooled down reducing the temperature, making the resistance lower. Therefore, a VOUT voltage is generated in proportion to the variation of vapor volume.
Internal Structure al Fft-i Sensor
Figure T-8.
Operational
amplifier
Rf
output voltage
2. Reheat Sensor Circuit
This circuit is composed of a part which transmits a change
of the reheat sensor voltage to PO0 terminal of LSI and of the
which supplies a constant current to the temperature sensi­tive resistor RH. When sensor cooking is started, 16 seconds of cleaning time will follow to let out residual moisture. After this cleaning time, the magnetron is oscillated. Forty se­conds later, SW1 to SW5 in LSI are turned on so that the in­put voltage to PO0 terminal of LSI will become approx. -4.8V. Then, in compliance with the changes of vapor volume com­ing from the food, the resistance ratio between RN and RH
varies to feed PO0 terminal of LSI with the voltage in propor-
tion to this ratio.
When this voltage level reaches the preset detection point, the
cooking is terminated. if the initial voltage setting cannot be made due to open or short-circuit the of sensor elements approximately 40 seconds after the sensor cooking was started, the indicator shows ER­ROR and sensor cooking is terminated.
ADVOl.
- 24”
f
-6.15V 34
P63
35 36
P9a
P91
- ‘9 PM)
1ooP
33b
6 rn4T
49 SW 49 SW2 4% SW3 49 SW4 47 sws
Figure T-l 0.
Figure T-9.
18
Page 20
R-9370
INDICATOR CIRCUIT
Method of Display
Indicator element is Fluorescent Display. Basically, a Fluorescent Display is a triode having a cathode, a grid and an anode. Usually, the cathode of Fluorescent Dis­play is directly heated and the filament serves as cathode. When a proper voltage is applied to the filament to heat it, thermo-electrons are emitted and, with positive voltage with respect to filament being applied to the anode and grid, elec­trons hit against the anode to illuminate the fluorescent body. If the anode or grid voltage is zero or negative against the fila­ment, thermo-electrons can not reach the anode, hence the fluorescent body is not luminescent.
In this model, the Fluorescent Display B-digits, 13-segments
are used for displaying figures.
The Fluorescent Display employs the dynamic drive method, when the high level of anode signal and grid signal agree, the corresponding segment displays.
The foliowng signals are responstble for speclfylng segments
I
Segment
1 sgnai / Segment I Sgnal /
Character format Its/-E-~ kE+G.
Indl-
MED
P43
M-HIGH
P43
HIGH
P43
COMPCl
WI3
AUTO
PW
Kg
Pm
COOK
PSI I
Digure T-l 1. Indicator Circuit
19
Page 21
R-9370
SERVICING
1.
2. Shapes of Electronic Components
3.
Precautions for Handling Electronic Components
This unit uses PMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should
be strictly followed. PMOS LSI have extremely high impedance at its input an.d output terminals. For this reason, it is easily influenced by the surrounding high voltage power source, static electric­ity charged in clothes, etc, and sometimes it is not fully pro­tected by the built-in protection circuit.
1) When storing and transporting, thoroughly wrap them in aluminum foil. Also wrap PW boards containing them in aluminum foil.
2) When soldering, ground the technician as shown in the
figure and use grounded soldering iron and wbrk table.
. .
approx 1MR
h
1’
@
EC*
v
8
,Y 5or13
/’
/
1
Y
Transistor
Transistor
Regurator IC
Hybrid IC
2SB953
DTCI 14EA
AN79L12
IC3, IC4
1: OUT Terminal
COMMON Terminal
IN Terminal
Servicing of Touch Control Panel
We describe the procedures to permit servicing the touch
control panel of the microwave oven and the cautions you must consider when doing so. To carry out servicing, power supply to the touch control panel is available either from the power line of the oven proper itself of from an external power source.
(1) Servicing the touch control panel with power supply
from the oven proper:
CAUTION: THE HIGH VOLTAGE TRANSFORMER OF THE MICROWAVE OVEN IS STILL ALIVE TO GIVE YOU DANGER DURING SERVICING.
[Therefore, when checking the performance of the
touch control panel, put the outer cabinet on the oven
proper to keep you from touching the high voltage transformer, or unplug the promary terminal (con-
nector) of the high voltage transformer to turn it off;
and the end of such connector shall be insulated with an insulating tape. After servicing, be sure to replace
the leads to their original locations.
20
A. On some models, the power supply cord between the
touch control panel and the oven proper is so short that they can’t be separated from each other. For those models, therefore, check and repair all the con­trols (with the sensor-related ones included) of the touch control panel while keeping it in contact with the oven
proper.
B. On some models, on the other hand, the power supply
cord between the touch control panel and the oven proper is so long that they may be separated from each other. For those models, therefore, it is allowed 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 stop switch (on PWB) of
the touch control panel with a jumper, which brings
about an operational state that is equivalent to that with the oven door being closed. As to the sensor-re!ated controls of the touch control
panel, their checking is allowed if the dummy resistor(s) whose resistance is equal to that of those controls is 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 stop switch (on PWB) of the touch control panel, which brings about such an operational state that is equivalent to that with the oven door being closed. And connect an external
power source to the power input terminal of the touch control panel, and then it is allowed to check and repair the controls of the touch control panel; as in the case
of (1 )-B above, it is here also possible to check the
sensor-related controls of the touch control panel by us-
ing the dummy resistor(s).
4. Sevicing Tools
Tools required when servicing the touch control panel as­sembly.
1) Soldering: 30W
(To prevent leaking current, it is recommended to use a soldering iron with grounding terminal.)
2) Oscilloscope: Single beam, frequency range: DC ­10MHz type or more advanced model
3) Others:
Other tools
5. Other Precautions
1) When turning on the power source of the control unit, remove the aluminum foil applied for preventing static electricity.
2) Connect the connectors of the indicator and key units to the control unit taking care that the lead wires are not twisted.
3) After alu,minum foil is removed, take extra care that ab­normal voltage due to static electricity etc. is not ap- plied to the Input or output terminals.
4) Attach connectors, electrolytic capacitors, etc. to PW board, taking care that all connections are tight.
5) Be sure to use specified components where high preci­sion is required.
Page 22
R-9370
MICROWAVE MEASUREMENT
After the adjustment of the latch switches and door is 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 SmW/cm* at any point 5cm or more from ex­ternal surface of the oven.
PREPARATION FOR THE TESTING:
Before beginning the actual test for leakage, proceed as follows;
1. Make sure that test instrument is operating normally as specified in its instruction booklet.
Important:
Survey instruments that comply with the requirement for
instrumentation 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 turntable tray into the oven cavity.
3. Place the load of 275 +15ml of water initially at 2O%‘C in the centre of the oven tray. The water container should be a low form of 600ml 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 the cool water.
5. Move the probe slowly (not faster that 2.5cm/sec.I 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.
21
Page 23
R-9370
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Page 24
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Figure S-3. Control Panel Circuit
Page 25
R-9370
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Figure S-4. Printed Wiring Board
3 4 5 I 6
24
Page 26
R-9370
PARTS LIST
REF.NO.
PART NO.
DESCRIPTION
Q’TY
CODE
4
l- 1
l- 2 l- 3 l- 4 l- 5
l- 6
l- 7 l- 8 l- 9 l-10 l-11 1-12 1-13 1-14 1-15 1-16 1-17
QACCAA007WREO
Mains supply cord
QFS-CQOOlYBEO
Fuse : MlOA
QFSHD0019WREO
Fuse holder
QSW-M0172WREO
Monitor switch (V-16G-2C25)
QSW-M0173WREO
Upper and lower latch switch (V-16G-3C25)
FDTCTA023WRKO
Reheat sensor
RLMPT0021WREO
Oven lamp
QS%L0055WREO
Oven lamp socket
RMoTE0184WREO
Fan motor
RH-DZA002WREO
Short protector
QSW-M0174WREO Stop switch (V-5330DK)
RMoTD0083WREO
Turntable motor
QFS-T0026WREO
Temp. fuse RTRN-A062WREO Power transformer RV-MZ0162WREO
Magnetron
RC-QZA025WREO
High voltage capacitor
RH-DZAOOlWREO
Rectifier
2- 1
FDAi-0270WRY0
2- 2
GDAi-0271WRP0
2- 3
GLEGP0021WREO
2- 4
GCABU0235WRPO
2- 5
TMAPCA126WRRO
2- 6
LSTPP0065WRFO
2- 7
LSTPP0066WRFO
2- 8
LBNDK0071WRWO
2- 9 XWHNZ57-15100 2-10 FHNG-0107WRY0 2-11
IPSPAGQ002YBEO Vibration proof cushion
3- 1 3- 1A 3- 1B
i
3- 1c 3- 1D
3- 1E
CPWBF196SWRKO
QPLGJ2381YAZZ
QPLGJ2255YAZZ QPLGJ2362YAZZ QPLGJ2299YAZZ QPLGJ2332YAZZ
. . .
Control unit
7-pin connector (A)
3-pin connector (B)
3-pin connector (C)
2-pin connector (F)
12-pin connector (G)
Note : The voltage supplied to the parts marked “%” is greater than 25OV.
ELECTRIC PARTS
CABINET PARTS
1
1 1 1
2
1
2 2
1 1 1 1 1 1 1 1 1
Base cabinet (A)
I
1
Base cabinet (B) Foot Outer case cabinet Schematic diagram Cord anchorage (upper)
1
Cord anchorage (lower)
1
Capacitor holder Hinge spacer (l.Omm) Lower oven hinge .
CONTROL PANEL PARTS
1
AQ
AE AF AG AG AS AF AH AW
AQ AH AV AG
BQ
BN AY AM
AP
AK AB
AZ
AB
AA
AA AD AA AF AA
BU AC AB AB AD AE
25
Page 27
-~
R-9370
REF.NO.
PART NO. DESCRIPTION
Q’TY
CODE
3- 1F RV-KX 2 0 4 4 Y A Z Z Fluorescent display tube 1 AW 3- 1G PCUS-2 0 11 YAZZ Tube cushion 2 AA Cl
VCQYCUlHM104K Capacitor O.lpF 5ov
1 AB c2 VC EAAH 1 HM 1 0 8M Capacitor 1OOO~F 5ov 1 AD c3 VCEAAA 1 EM3 3 7M Capacitor 330,uF 25V 1 AC C4,C6, VCKYAT 1 EX 15 3N Capacitor O.O15/1F 25V 5 AA
c21,c92, c93
c5 VCEAAA 1 EM4 7 6M -Capacitor 47,uF 25V 1 AB c20
VCEAAAlHM2 2 5M Capacitor 2.2pF 5ov
1
AA
C4O,C94 VCKZPU 1 H F 1 0 3 Z Capacitor O.OlpF 5ov 2 AA c70 VCEAAA 1 HM3 3 7M Capacitor 33OfiF 5ov 1 AD C71,C72 VCTY PU 1 E F 1 0 4 Z Capacitor O.lpF 25V 2 AC C9O,C91 VCCCPR lH3 2 2 1 J Capacitor 22OpF 5ov 2 AB CF90 RCRS-2 0 0 9YAZZ Ceramic filter (400kHz) 1 AF
Dl RH-DX2006YAZZ Diode bridge(SlWBA10)
1
AE
02, D70 VHDllESl///-1 Diode(llES1) 2 AB D3
VHDlSS133//-1 Diode(lSS133)
1 AA
D80,D81 VHDUSlO 60//-l Diode (US1060)
2 AA
Fl
QFS-A2010YAZZ Fuse
1 AF
ICl
RH-iX2412YAZZ LSI
1 AV
IC2
RH- i X 2 4 14 Y A Z Z Regulator IC (AN79L12)
1
AE
IC3
RH-iX2413YAZZ Hybrid IC
1 AL
IC4
QI-I i CA4 189KAZZ Hybrid IC
1
AL
Ll RCiLF2003YAZZ Coil(22pH) 1
AC
Ql VS 2 SA7 15-B/- 1 Transistor (2SA715B,C) 1 AD 420 VSDTA-14 3-A-l Transistor (DTA143EA) 1 AB
Q30,Q80 VSDTC-1 14-A-l Transistor (DTC114EA)
2 AC
Q70
VS2SB953-Q/-l Transistor (2SB953Q, R, P)
1
AG
Rl VRD-ST2EF2R2J Resistor
2.2t.I
1/4w 1
AA
R2 VRD-ST2 EF 10 2 J Resistor lkn 1/4w 1 AA R3 VRS-FT3AB2 7 1 J Resistor 27Oa 1w 1 AA R4 VRD-ST2DF 8 2 1 J Resistor 82OQ 1/5w 1 AA
R5 VRS-FT3AB8 2 1 J Resistor 82Oa 1w 1 AA R7, R8 VRD-ST2DF4 73 J Resistor
47ka
1/5w
2
AA
RlO VRD-ST2DF3 6 2 J Resistor 3.6kSZ 1/5w 1 AA Rll VRD-ST2DF 13 3 J Resistor 13kn 1/5w 1 AA
R20,R21 VRD-ST2DF 10 3 J Resistor 10ka 1/5w 2 AA R30,R40 VRD-ST 2 DF 3 3 2 J Resistor 3.3kn 1/5w 2 AA
26
Page 28
R-9370
REF.NO.
PART NO.
,
*
DESCRIPTION
Q’TY
CODE
R50 RR-K Z 2 0 5 0 Y A Z Z
Resistor block 150kfix4
1 AB
R70 VRN-RT 2 DC 9 1 2 F
Resistor 9.1 kR( F) 1/5w
1 AA
R71
VRN-RT2DC474F Resistor
470kn(F)
1/5w
1
AA
R73
VRN-RT2DC342F Resistor
3.4ka(F)
1/5w
1
AA
R74 VRD-ST2HA6 2 0 J
Resistor 62iI 1/2w
1 AA
R90 VRD-ST2DF 10 5 J
Resistor 1Ma 1/5w
1 AA
RYl,RY2 RRLY-2 10 2YAZZ Relay (18V. D. C>
2 AD
SPl
RALMB2023YAZZ Buzzer
1 AG
Tl
RTRNP2 109YAZZ Transformer
1
AR
VRSl RH-VX2 0 19YAZZ
Varistor
1 AF
ZDl
VHEHZ2 O-3//-1
Zener diode (HZ20-3)
1 AB
ZD2 VH E H Z 6 A 2///- 1
Zener diode (HZ6A-2)
1 AB
ZD20
VHEHZgAl///-1 Zener diode (HZ9A-1)
1
AB
3- 2 F P N L CA 13 0 WR K 0
Control panel frame assembly
1 BD
3- 3 JBTN-A153WRFO
Open button
1 AD
3- 4 MSPRC0070WREO Spring
1 AA
3- 5 F L E V F 0 14 0 W R E 0
Open Device
1 AG
3- 6 XPNSD8 O---O 0 0
Pin
1 AA
3- 7 PCUSU0490WRPO
Shading cushion
1 AB
3- 8 GMAD i 0 0 5 0 WR F 0
Display filter (A)
1 AF
3- 9 PF i LWAO 17WRP 0
Display filter (B)
1 AB
OVEN PARTS
4- 1 DOVN-0 2 4 3WRT 0
Oven cavity
1 BM
4- 2 PCbVPO 2 7 9WRE 0
Waveguide cover
1 AF
4- 3 PCLiCQOOlYBEO
Clip
3 AA
4- 4 PF i LWO 0 3 5WRP 0
Oven lamp filter
2 AB
4- 5 NTNT-0 0 6 8WR F 0
Turntable tray
1 AW
4- 6 NCP L-A 0 0 1 WR F 0
Turntable coupling
1 AG
4- 7 PSPA-A009WREO Coupling
spacer
1 AB
4- 8 LANGQO 4 3 3WRW0
Turntable motor mounting bracket
1 AF
4- 9 NBRGPO 0 18WRF 0
Coupling holder
1 AC
4-10 L H L D- 0 0 5 4 W R F 0
Turntable roller cover
3 AE
4-11 PCGVPO 3 5 2WRP 0 Turntable motor cover
1 AF
4-12 FHNG-0 10 6WRY 0
Upper oven hinge
1 AE
4-13 NRbLPO 0 2 GWREO
Turntable roller
3 AD
4-14 NS F TT 0 0 7 4WR E 0 Turntable roller shaft
3 AA
4-15 LANGQO 4 3 2WRW0 Lamp socket mounting plate
1 AD
4-16 PDUC-A0 8 5WRF 0 Steam duct
1 AH
27
Page 29
-~~ ~~
R-9370
REF.NO.
PART NO.
DESCRIPTION
Q’TY
CODE
4-17 F FAN J 0 0 3 1WRK 0 Fan blade assembly 1 AF 4-17 A L STY-O 0 3 OWR E 0 Fan retainer clip 1 AA 4-18 P DU C- 0 5 1 8 WR F 0 Magnetron cooling duct (A) 1 AH 4-19 PDUC-0 5 15WR F 0 Magnetron cooling duct (B) 1 AH 4-20 LANGF 0 3 4 OWRP 0 Chassis support 1 AE 4-21 LANGK0141WRFO Upperlatch hook 1 AF 4-22 LANGK 0 2 3 2WR F 0 Lower latch hook 1 AE
’
4-23 ML E V F 0 1 2 4WR E 0 Monitor switch lever 1 AC 4-24 GCABDO 0 4 7WRW0 Rear cabinet 1 AR 4-25 LHLDK0005YBFO Cord holder 1 AB
4-26 MLEVP0067WRFO Stopswitch lever 1 AC 4-27 FDECQAO 0 2WRK0 Upper sash assembly 1 AT 4-27 A HDECQA035WRFO Uppersash 1 AN 4-27 B LANGT 0 4 1 GWRWO Upper sash mounting plate 1 AG 4-27 C PSLDM0364WREO Ferrite 1 AH 4-28 FDECQAO 0 3WRK0 Lower sash assembly 1 AU 4-28 A HDECQA036WRFO Lowersash 1 AN 4-28 B LANGT 0 4 1 7WRW0 Lower sash mounting plate 1 AG 4-28 C PS LDMO 3 6 4WR E 0 Ferrite (same as 4-27C) 1 AH 4-29 HDECCAO 3 4WRF 0 Left sash 1 AG 4-30 PCGVPA 0 5 6WRW0 Sensor cover 1 AD
DOOR PARTS
I
5
1 CDORFAO 8 OWRKO 1 Complete door assembly
I
1
I BN I
% 6- 1
% 6-2
6- 3 6- 4 6- 5 6- 6 6- 7 6- 8
MISCELLANEOUS
QW-Q Z 0 1 6 4WR E 0 High voltage wire A 1 QW-Q Z 0 1 3 2WR E 0 High voltage wire B 1 FW-VZA 1 6 1 WR E 0 Main wire harness 1 TSPCNA278WRRO Nameplate 1 TCAUH 0 1 14WRR 0 Caution label 1 TCADCO 2 2 OWRRO Cook book 1
T i NSEAl 5 2WRE0 Operation manual
1
FW-VZA 1 6 OWR E 0 Sensor harness 1
SCREWS, NUTS AND WASHERS
AE AE AV AB AC AY AE AH
7- 1 LX-B Z 0 1 4 1 WR E 0 Screw ; monitor switch lever mtg. 1 AA
7- 2 LX-BZ 0 1 8 6WR E 0 Screw ; Capacitor holder, rectifier, turntable motor
cover,
5 AA
earthing (control panel frame) mtg.
Note : The voltage supplied to the parts marked I’%” is greater than 250V.
28
Page 30
R-9370
REF.NO.
PART NO.
DESCRIPTION
Q’TY
CODE
7- 3 XOT SC4 0 P 1 2 0 0 0
Screw ; outer case cabinet mtg.
7 AA
7- 4 L X-E Z 0 0 4 6 WR E 0
Screw ; outer case cabinet mtg.
2 AA
7- 5 L X-CZ 0 0 4 7 WR E 0
Screw ; lower sash assembly, cabinet base (A) and
4 AA
(B) n-Q?*
7- 6 LX-CZ 0 0 5 2WR E 0
Screw ; upper latch hook and lower latch hook mtg.
2 AA
7- 7 XB BUW3 0 P 0 8 0 0 0
Screw ; lamp socket mounting plate mtg.
2 AA
7- 8 XFPSD30PlOOOO Screw; fuse holder mtg.
1 AA
7- 9 XBPSD40P25000
Screw; fan motor mtg.
2 AA
7-10 X B P SD 4 0 P 2 0 0 0 0
Screw ; cord anchorage mtg.
1 AA
7-11 XBPSD50PlOKOO Screw; magnetron mtg.
4 AA
7-12 X B P SD 6 0 P 14 K S 0
Screw ; power transformer mtg.
2 AA
7-13 X B T UW4 0 P 0 8 0 0 0
Screw ; turntable motor assembly mtg.
3 AA
7-14 X F P S D 4 0 P 0 8 0 0 0 Screw ; turntable motor mtg.
2 AA
7-15 XC P SD 3 0 P 0 8 0 0 0
Screw ; oven lamp socket, left sash assembly mtg.
4 AA
7-16 L X-CZ 0 0 7 4WR E 0
Screw ; upper oven hinge and lower oven hinge mtg.
5 AA
7-17 XCTDS 4 0 P 1 2 0 0 0 Screw ; cabinet base (B), upper sash assembly and lower
11 AA
sash assembly, rear cabinet mtg.
7-18 XWV S D 3 5 - 0 4 0 0 0
Washer ; control unit mtg.
2 AA
7-19 LX-NZ 0 0 7 0 WR E 0
Nut ; earthing (mains supply cord) mtg.
1 AA
7-20 XN E SD4 O-3 2 0 0 0 Nut ; fan motor and cord anchorage (upper) mtg.
3 AA
7-21 XWWSD 6 O-O 8 0 0 0 Washer ; power transformer mtg.
1 AA
7-22 XWH SD 5 0 -0 8 0 0 0 Washer ; monitor switch lever mtg.
1 AA
7-23 XT T S D4 0 P 1 2 TV 0
Screw ; control unit, chassis support mtg.
5 AA
7-24 XTPSD40P12XSO
Screw; opendevicemtg.
2 AA
7-25
XHPSD30P12XSO Screw; control unit mtg.
3
AA
7-26 LX-NZ 0 0 8 3WR E 0 Nut ; earthing (control frame)
pane
1 AA
7-27
XHPSD30Pl 2XS0
Screw; control unit mtg.
3
AA
HOW TO ORDER REPLACEMENT PARTS
To have your order filled promptly and correctly, please furnish the following information.
1. MODEL NUMBER 2. REF. NO.
3. PART NO. 4. DESCRIPTION
29
I.
Page 31
R-9370
1 2 I 3 I 4 I 5 I 6
1
CABINET PARTS
P
7- 17
I
0
2- 9
(
0
7-16
1 2 I 3 I 4 I 5 I 6
30
Page 32
R-9370
1 I 2 3 I 4 5 I 6
1
I
OVEN PARTS
’
% @ except @ (rear cabinet)
1 I 2 I 3
4 I 5 I 6
31
Page 33
R-9370
1
I
2
I 3
I
4
I
5
I
6
CONTROL PANEL PARTS
3-2
o\
3-3
k
a’
/
.
/’
32
Page 34
R-9370
1
I 2
3
4
I
5
I 6
\
I
DOOR ASSEMBLY
L
:
MISCELLANEOUS
(TRANs)
(CAP.
1
0---a
6- I
(MAG.)
(CAP.
1
f
:
F
;
c
-
i t
1 I
2
I
3 4
I
5
I
6
33
Page 35
R-9370
PACKING AND ACCESSORIES
CABINET PROTECTION SHEET (SPADP0307WREO)
MICROWAVE OVEN
PLASTIC BAG
PACKING ADD KIT
(CPADB0222WRKO)
DOOR
PROTECTION SHEET
TRAY HOLDER (SPADF0440WREO)
PACKING CASE
(SPAKCA212WREO)
‘86 0 SHARP CORP. (6N0.8E) Printed in Japan
34
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