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R330ak
Owner's Manual
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Sharp R330ak Owner's Manual

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Page 1
R-310AK R-330AK R-330AW
SUPPLEMENTAL SERVICE MANUAL
S1702R330APK/
MICROWAVE OVEN
FOR O VENS FR OM JANUARY 1997 PRODUCTION
MODELS
R-310AK R-330AK R-330AW
In the interest of user-safety the oven should be restored to its original condition and
only parts identical to those specified should be used.
This is a supplemental Service Manual for Models R-310A K, R-330A K and R-330AW. This supplemental service manual is mainly described the touch control panel parts information for the ovens from January 1997 production. Use this supplemental manual together with the Base Model Service Manual (Refer No. is S8605R330APK/) for complete operation, service information, etc..
TABLE OF CONTENTS
Page PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICE TO
BEFORE SERVICING ......................................................................................................INSIDE FRONT COVER
FOREWORD.....................................................................................................................INSIDE FRONT COVER
TEST PROCEDURE ..............................................................................................................................................1
TOUCH CONTROL PANEL ASSEMBLY ..............................................................................................................3
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ..................................................................9
PICTORIAL DIAGRAM ........................................................................................................................................10
POWER UNIT CIRCUIT ......................................................................................................................................11
CPU UNIT CIRCUIT ............................................................................................................................................13
PRINTED WIRING BOARD OF POWER UNIT ...................................................................................................15
PARTS LIST FOR CONTROL PANEL ................................................................................................................16
INFORMATION FOR PARTS CHANGING ..........................................................................................................17
SHARP ELECTRONICS CORPORATION
Service Headquarters: Sharp Plaza, Mahwah, New Jersey 07430-2135
Page 2
R-310AK R-330AK R-330AW
SERVICE MANUAL
MICROWAVE OVEN
R-310AK/ R-330AK/ R-330AW
FOREWORD
This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVENS, R-310AK, R-330AK, R-330AW.
It is recommended that service personnel carefully study the entire text of this manual so that they will be qualified to render satisfactory customer service.
Check the interlock switches and the door seal carefully. Special attention should be given to avoid electrical shock and microwave radiation hazard.
This supplemental service manual contains update information only. Please refer to base model service manual (Refer No. is S8605R330APK/) for complete service information.
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
(a) Do not operate or allow the oven to be operated with the door open. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwave source, and make repairs as necessary: (1) interlock operation, (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5) evidence of dropping or abuse.
(c) Before turning on microwave power for any service test or inspection within the microwave generating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and
transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is released to the owner.
(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be performed
on each oven prior to release to the owner.
BEFORE SERVICING
Before servicing an operative unit, perform a microwave emission check as per the Microwave Measurement Procedure outlined in this service manual. If microwave emissions level is in excess of the specified limit, contact SHARP ELECTRONICS CORPO­RATION immediately @1-800-237-4277.
If the unit operates with the door open, service person should 1) tell the user not to operate the oven and
2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administration's Center for Devices and Radiological Health immediately.
Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit found with emissions in excess of 4mW/cm2. The owner of the unit should be instructed not to use the unit until the oven has been brought into compliance.
Page 3
PROCEDURE
LETTER
J TOUCH CONTROL PANEL ASSEMBLY TEST
R-310AK R-330AK R-330AW
TEST PROCEDURES
COMPONENT TEST
The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore, unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeter and ohmmeter. In this service manual, the touch control panel assembly is divided into two units, Control Unit and Key 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. Key Unit. Note : Check key unit ribbon connection before replacement. The following symptoms indicate a defective key unit. Replace the key unit. a) When touching the pads, a certain pad produces no signal at all. b) When touching a number pad, two figures or more are displayed. c) When touching the pads, sometimes a pad produces no signal.
2. Control Unit The following symptoms indicate a defective control unit. Before replacing the control unit, perform the Key unit test (Procedure K) to determine if control unit is faulty.
2-1 In connection with pads.
a) When touching the pads, a certain group of pads do not produce a signal. b) When touching the pads, no pads produce a signal.
2-2 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. 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.
2-3 Other possible problems 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.
Note: When defective components, the Power Unit or Key Unit are replaced, the defective part or parts
must be properly packed for return in the shipping carton, with its cushion material, in which the new replacement part was shipped to you.
L RELAY TEST
Remove the outer case and check voltage between Pin No. 3 of the 2 pin connector (A) and the common terminal of the relay RY2 on the control unit with an A.C. voltmeter. The meter should indicate 120 volts, if not check oven circuit. RY1 and RY2 Relay Test
These relays are operated by D.C. voltage Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.
DC. voltage indicated ............. Defective relay.
DC. voltage not indicated ........ Check diode which is connected to the relay coil. If diode is good, control
RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS
RY1 Approx. 24.5V D.C. Approx. 14.0 D.C. Oven lamp / Turntable motor / Cooling fan motor RY2 Approx. 24.0V D.C. Approx. 12.8 D.C. Power transformer
unit is defective.
R-330AK/AW R-310AK
1
Page 4
R-310AK R-330AK R-330AW
PROCEDURE
LETTER
N PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD
TEST PROCEDURES
COMPONENT TEST
(PWB) IS OPEN
To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary 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.
STEPS OCCURRENCE CAUSE OR CORRECTION
1 The rated AC voltage is not present between Check supply voltage and oven power cord.
Pin No. 3 of the 2-pin connector (A) and the common terminal of the relay RY2.
2 The rated AC voltage is present at primary Low voltage transformer or secondary circuit defective.
side of low voltage transformer. Check and repair.
3 Only pattern at "a" is broken. *Insert jumper wire J1 and solder.
4 Pattern at "a" and "b" are broken. *Insert the coil RCILF2003YAZZ between "c" and "d".
XH
CN - A
VH
3
3
NOTE:*At the time of making these repairs,
make a visual inspection of the varistor. Check for burned damage and exam­ine the transformer with a tester for the presence of layer short-circuit (check the primary coil resistance which is ap­proximately 212Ω ± 10% (for R-330AK/ AW), 563Ω ± 10% (for R-310AK)). If any abnormal condition is detected, replace the defective parts.
c
(J1)
a
b
d
(COM)
AC
HVT
RY2
2
Page 5
TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL
R-310AK R-330AK R-330AW
The touch control section consists of the following units. (1) Key Unit
(2) Control Unit (The Control Unit consists of Power Unit and
CPU Unit).
The principal functions of these units and the signals com­municated among them are explained below.
Key Unit (R-330AK/AW)
The key unit is composed of a matrix, signals generated in the LSI are sent to the key unit through P20 - P27. When a key pad is touched, a signal is completed through the key unit and passed back to the LSI through P74 - P77 to perform the function that was requested.
Key Unit (R-310AK)
The key unit is composed of a matrix, signals generated in the LSI are sent to the key unit through P73, P81, P82, P83, P90 and P91
.
When a key pad is touched, a signal is completed through the key unit and passed back to the LSI through P60 - P63 to perform the function that was requested.
Control Unit
Control unit consists of LSI, ACL circuit, indicator circuit, power source circuit, relay circuit, buzzer circuit, synchroniz­ing signal circuit, absolute humidity sensor circuit and back light circuit.
2) Indicator Circuit (R-310AK)
This circuit consists of 12 segments and 3 common elec­trodes using a Liquid Crystal Display.
3) Power Source Circuit
This circuit generates voltages necessary in the control unit from the AC line voltage. In addition, the synchronizing signal is available in order to compose a basic standard time in the clock circuit.
Symbol Voltage Application
VC -5.3V LSI(IC1)
4) Relay Circuit
A circuit to drive the magnetron, fan motor, turntable motor and light the oven lamp.
5) Buzzer Circuit
The buzzer is responsive to signals from the LSI to emit audible sounds (key touch sound and completion sound).
6) 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.
7) Door Sensing Switch
A switch to “tell” the LSI if the door is open or closed.
1) ACL
This circuit generates a signal which resets the LSI to the initial state when power is supplied.
2) Indicator Circuit (R-330AK/AW)
This circuit consists of 25 segments and 4 common elec­trodes using a Liquid Crystal Display.
8) Back Light Circuit
A circuit to drive the back light (Light emitting diodes LD1­LD5).
9) Absolute Humidity Sensor Circuit (R-330AK/AW)
This circuit detects moisture of the cooking food to allow its automatic cooking.
3
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R-310AK
A
B
0.1 sec.
2 sec.
H : GND
L : -5V H : GND
L : -5V
R-330AK R-330AW
DESCRIPTION OF LSI
LSI(IZA757DR) : R-330AK/AW
The I/O signal of the LSI(IZA757DR) is detailed in the following table.
Pin No. Signal I/O Description
1 C1 IN Terminal not used. 2 VL1 IN
Power source voltage input terminal.
Standard voltage for LCD.
3-6 AN7-AN4 IN
Terminal to change cooking constant 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 cooking constant. 7 AN3 OUT Terminal not used. 8 AN2 IN
To input signal which communicates the door open/close information to LSI.
Door closed; “H” level signal (0V).
Door opened; “L” level signal (-5V). 9 AN1 IN
AH sensor input.
This input is an analog input terminal from the AH sensor circuit, and connected to the A/D
converter built into the LSI.
10 AN0 IN Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is an
analog input terminal from the AH sensor circuit, and connected to the A/D converter built into
the LSI.
11-13 P57-P55 OUT Terminal not used.
14 P54 OUT
Signal to sound buzzer (2.0KHz).
A: key touch sound.
B: Completion sound.
15-18 P53-P50 OUT Terminal not used. 19-23 P47-P43 OUT Used for initial balancing of the bridge circuit (absolute humidity sensor).
24 INT0 IN
Signal synchronized with commercial power source frequency.
This is basic timing for time processing of LSI.
16.7 msec.
H : GND
L : -5V
25-26 P41-P40 OUT Terminal not used.
27 P77 IN
Signal coming from touch key.
When either G12 line on key matrix is touched, a corresponding signal out of P20 - P27 will
be input into P77. When no key is touched, the signal is held at “H” level.
28 P76 IN
Signal similar to P77.
When either G11 line on key matrix is touched, a corresponding signal will be input into P76.
29 P75 IN
Signal similar to P77.
When either G10 line on key matrix is touched, a corresponding signal will be input into P75.
30 P74 IN
Signal similar to P77.
When either G9 line on key matrix is touched, a corresponding signal will be input into P74.
31 P73 OUT
32 P72 OUT
Oven lamp, fan motor and turntable motor driving signal.
To turn on and off shut off relay (RY1). The
16.7 msec.
square waveform voltage is delivered to the
RY1 driving circuit and RY2 control circuit.
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds “L” level during microwave cook-
ing and “H” level while not cooking. In other
cooking modes (variable cooking) the signal
turns to “H” level and “L” level in repetition
according to the power level.
OFF
P-HI
OFF OFF
P-70
4
During cooking
ON
24 sec.
ON
8 sec.
H : GND
L : -5V
H : GND
L : -5V H : GND
L : -5V
Page 7
Pin No. Signal I/O Description
33 P71 OUT Terminal not used. 34 P70 IN Connected to VC. 35 RESET IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily set to “L” level the moment power is applied, at this time the LSI is reset. Thereafter set at “H” level.
36-37 P81-P80 OUT Terminal not used.
38 XIN IN
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to XIN terminal.
39 XOUT OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XOUT.
40 VSS IN
Power source voltage : -5.1V.
VC voltage of power source circuit input.
41 P27 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal while one of G8 line keys on key matrix is touched.
42 P26 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal while one of G7 line keys on key matrix is touched.
43 P25 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal while one of G6 line keys on key matrix is touched.
44 P24 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal while one of G5 line keys on key matrix is touched.
45 P23 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal while one of G4 line keys on key matrix is touched.
46 P22 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal while one of G3 line keys on key matrix is touched.
47 P21 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal while one of G2 line keys on key matrix is touched.
48 P20 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal while one
of G1 line keys on key matrix is touched. 49-50 P17-P16 OUT Terminal not used. 51-62 63-66
SEG39-SEG28 OUT Terminal not used. SEG27-SEG24 OUT Segment data signal. Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.)
SEG 27 (63) ........................ S0 SEG 12 (78).......................... S5
SEG 26 (64) ........................ S1 SEG 11 (79).......................... S6
SEG 25 (65) ........................ S2 SEG 10 (80).......................... S7
SEG 24 (66) ........................ S3 SEG 9 (81)........................... S8
SEG 22 (68) ........................ S4 SEG 8 (82)........................... S9
SEG 21 (69) ...................... S26 SEG 6 (84)......................... S10
SEG 20 (70) ...................... S25 SEG 5 (85)......................... S11
SEG 19 (71) ...................... S24 SEG 4 (86)......................... S12
SEG 18 (72) ...................... S23 SEG 3 (87)......................... S13
SEG 17 (73) ...................... S22 SEG 2 (88)......................... S14
SEG 16 (74) ...................... S21 SEG 1 (89)......................... S15
SEG 14 (76) ...................... S20 SEG 0 (90)......................... S16
SEG 13 (77) ...................... S19
5
R-310AK R-330AK R-330AW
Page 8
R-310AK R-330AK R-330AW
Pin No. Signal I/O Description
67 SEG23 OUT Terminal not used.
68-74
SEG22-SEG16 OUT Segment data signal.
Signal similar to SEG27.
75 SEG15 OUT Terminal not used.
76-82
SEG14-SEG8 OUT Segment data signal.
Signal similar to SEG27.
83 SEG7 OUT Terminal not used.
84-90
SEG6-SEG0 OUT Segment data signal.
Signal similar to SEG27.
91/92
VCC/VREF IN Connected to GND.
93 AVSS IN Connected to VC. 94 COM3 OUT
Common data signal: COM3.
Connected to LCD (Pin No. C0).
95 COM2 OUT
Common data signal: COM2.
Connected to LCD (Pin No. C1).
96 COM1 OUT
Common data signal: COM1.
Connected to LCD (Pin No. C2).
97 COM0 OUT
Common data signal: COM0.
Connected to LCD (Pin No. C3).
98-99 VL3-VL2 IN
Power source voltage input terminal.
Standard voltage for LCD.
100 C2 IN Terminal not used.
LSI(IZA758DR) : R-310AK
The I/O signal of the LSI(IZA758DR) is detailed in the following table.
Pin No. Signal I/O Description
1-12
SEG0-SEG11 OUT Segment data signal.
Connected to LCD. The relation between signals are as follows: LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.)
SEG 0 (1) ...................................S12 SEG 6 (7) ....................................S6
SEG 1 (2) ...................................S11 SEG 7 (8) ....................................S5
SEG 2 (3) ...................................S10 SEG 8 (9) ....................................S4
SEG 3 (4) .....................................S9 SEG 9 (10) ..................................S3
SEG 4 (5) .....................................S8 SEG 10 (11) ................................S2
SEG 5 (6) .....................................S7 SEG 11(12) .................................S1
13 R60 IN
Signal coming from touch key.
When either G12 line on key matrix is touched, a corresponding signal out of R73, R81-R83 and R90-R91 will be input into R60. When no key is touched, the signal is held at "H" level.
14 R61 IN
Signal similar to R60.
When either G11 line on key matrix is touched, a corresponding signal will be input into R61.
15 R62 IN
Signal similar to R60.
When either G10 line on key matrix is touched, a corresponding signal will be input into R62.
16 R63 IN
Signal similar to R60.
When either G9 line on key matrix is touched, a corresponding signal will be input into R63.
17 AIN0 IN
To input signal which communicates the door open/close information to LSI.
Door close "H" level signal (0V). Door open "L" level (-5V)
18-20
AIN1-AIN3 IN Terminal to change 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.
21 VSS IN
Power source voltage: -5V
VSS voltage of power source circuit input.
6
Page 9
Pin No. Signal I/O Description
16.7 msec.
During cooking
H : GND
L : -5V
16.7 msec.
H : GND
L : -5V
22 R70 OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds "L" level during microwave cooking
and "H" level while not cooking. In other cooking
modes (variable cooking) the signal turns to "H"
level and "L" level in repetition according to the
power level.
23 PULSE OUT
Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
24 R72 OUT
Oven lamp, fan motor and turntable motor driving signal
To turn on and off shut off relay (RY1). The
square waveform voltage is delivered to the
RY1 driving circuit and RY2 control circuit.
R-310AK R-330AK R-330AW
OFF
P-HI
OFF OFF
P-70
ON
ON
24 sec.
8 sec.
H : GND
L : -5V H : GND
L : -5V
(ON and OFF times for other power level.)
0.1 sec.
A
2 sec.
B
H : GND
L : -5V H : GND
L : -5V
25 R73 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one
of G8 line keys on key matrix is touched.
26 INT2 IN
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
27 R81 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one
of G7 line keys on key matrix is touched.
28 R82 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one
of G6 line keys on key matrix is touched.
29 R83 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one
of G5 line keys on key matrix is touched.
30 R90 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one
of G4 line keys on key matrix is touched.
31 R91 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one
of G3 line keys on key matrix is touched.
32 R92 OUT Terminal not used. 33 XIN IN
Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the capacitor and resistor circuit with respect
to XOUT terminal.
34 XOUT OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
35 RESET IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied. Temporarily set "L"
level the moment power is supplied, at this time the LSI is reset. Thereafter set at "H" level.
36 HOLD IN/OUT Connected to GND. 37 VLC IN
Signal synchronized with commercial power source frequency.
Signal similar to VSS.
38 COM1 OUT
Common data signal: COM1.
Connected to LCD (Pin No. C1)
39 COM2 OUT
Common data signal: COM2.
Connected to LCD (Pin No. C2)
7
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R-310AK R-330AK R-330AW
Pin No. Signal I/O Description
40 COM3 OUT Common data signal: COM1.
Connected to LCD (Pin No. C3) 41 COM4 OUT Terminal not used. 42 VDD IN
Power source voltage input terminal.
Connected to GND.
ABSOLUTE HUMIDITY SENSOR CIRCUIT (R-330AK/AW)
(1) Structure of Absolute Humidity Sensor
The absolute humidity sensor includes two thermistors as shown in the illustration. One thermistor is housed in the closed vessel filled with dry air while another in the open vessel. Each sensor is provided with the protective cover made of metal mesh to be protected from the external airflow.
ventilation opening for sensing
Sensing part (Open vessel)
Thermistors
Sensing part (Closed vessel)
(2) Operational Principle of Absolute Humidity Sensor
The figure below shows the basic structure of an absolute humidity sensor. A bridge circuit is formed by two thermistors and two resistors (R1 and R2). The output of the bridge circuit is to be amplified by the operational amplifier. Each thermistor is supplied with a current to keep it heated at about 150˚C (302˚F), the resultant heat is dissipated in the air and if the two thermistors are placed in different humidity conditions they show different degrees of heat conductivity leading to a potential difference between them causing an output voltage from the bridge circuit, the intensity of which is increased as the absolute humidity of the air increases. Since the output is very minute, it is amplified by the operational amplifier.
Absolute humidity vs,
R1
R2
Operational amplifier
+
-
S : Thermistor open vessel
C : Thermistor closed vessel
Output voltage
Output voltage
C
S
R3
output voltage characterist
Absolute humidity (g/m )
2
(3) Detector Circuit of Absolute Humidity Sensor Circuit
This detector circuit is used to detect the output voltage of the absolute humidity circuit to allow the LSI to control sensor cooking of the unit. When the unit is set in the sensor cooking mode, 16 seconds clearing cycle occurs than the detector circuit starts to function and the LSI observes the initial voltage available at its AN1 terminal.
With this voltage given, the switches SW1 to SW5 in the LSI are turned on in such a way as to change the resistance values in parallel with R107 ~ R111. Changing the resistance values results in that there is the same potential at both F­3 terminal of the absolute humidity sensor and AN0 terminal of the LSI. The voltage of AN1 terminal will indicate about
-2.5V. This initial balancing is set up about 16 seconds after the unit is put in the Sensor Cooking mode. As the sensor cooking proceeds, the food is heated to generate moisture by which the resistance balance of the bridge circuit is deviated to increase the voltage available at AN1 terminal of the LSI. Then the LSI observes that voltage at AN1 terminal and compares it with its initial value, and when the comparison rate reaches the preset value (fixed for each menu to be cooked), the LSI causes the unit to stop sensor cooking; thereafter, the unit goes in the next operation automatically. When the LSI starts to detect the initial voltage at AN1 terminal 16 seconds after the unit has been put in the Sensor Cooking mode, if it is not possible to balance, of the bridge circuit due to disconnection of the absolute humidity sensor, ERROR will appear on the display and the cooking is stopped.
1) Absolute humidity sensor circuit
C. Thermistor in  closed vesssl S. Thermistor in open vessel
F-1 C
F-3
3.57k
S
F-2
VA : -15V
R112
R105
3.32k
R90
C101
1.8k
 R107
R108 R109 R110 R111
R106
0.1
R101
uF
37.4k
47k
C103
+
IC2
-
VA : -15V
620k
300k 150k
75k
R102 360k
0.01uF
C102
0.015uF
R103
10k
VC : -5V
R104
47k
0.01uF
C104
D101
SW1
19
R47
SW2
20
R46
SW3
21
R45
SW4
22
R44
SW5
23
R43
10
AN0
LSI (IC1)
9
AN1
8
Page 11
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
CAUTION: DISCONNECT OVEN FROM POWER SUPPLY BEFORE REMOVING OUTER CASE.
DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING AFTER REMOVING OUTER CASE.
CONTROL PANEL ASSEMBLY REMOVAL
R-310AK R-330AK R-330AW
1. Disconnect oven from power supply and remove outer case.
2. Discharge high voltage capacitor.
3. Disconnect wire leads from the door sensing switch and the oven cavity front flange.
4. Disconnect the wire leads from panel components.
5. Make one (1) tab of the oven cavity front plate straight holding the control panel assembly to the oven flange.
6. Slide the control panel assembly upward and remove it.
7. Now, individual components can be removed.
NOTE: 1. Before attaching a new key unit, wipe off remaining
adhesive on the control panel frame surfaces completely with a soft cloth soaked in alcohol.
2. When attaching the key unit to the control panel frame, adjust the upper edge and right edge of the key unit to the correct position of control panel frame.
3. Stick the key unit firmly to the control panel frame by rubbing with soft cloth not to scratch.
CPU UNIT AND POWER UNIT NOTE: When soldering the CPU unit and the power unit, make
sure both the CPU unit and power unit are parallel, as shown figure C-9.
CPU unit
Connector
Solder
These should be parallel
Power unit
Figure C-9. Side view of CPU unit and Power unit
Handle the CPU unit carefully so that the ribbon cable does not come off. Because the ribbon cable is sticked on the LCD and the printed wiring board only by heated paste.
Ribbon cable
Liquid Crystal
Display (LCD)
of CPU unit
Printed wiring board 
Figure C-10. CPU unit
WARNING FOR WIRING
To prevent an electric shock, take the following manners.
1. Before wiring,
1) Disconnect the power supply.
2) Open the door and wedge the door 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: Oven lamp, Magnetron, High voltage transformer and Oven cavity.
3) Sharp edge: Bottom plate, Oven cavity, Weveguide flange, Chassis support and other metallic plate.
4) Movable parts (to prevent a fault) Fan blade, Fan motor, Switch, Switch lever, Open button.
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.
9
Page 12
R-310AK R-330AK R-330AW
1
A
BLKBLK
B
OVEN
THERMAL CUT-OUT
C
2
GRN
N
H
BLK
NOTE:
The grounding conductor of
the power supply cord has
been grounded by power
supply cord fixing screw.
The screw must allways be
kept tight.
OUTER CASE 
SWITCH (Upper)
N.O.
BLK
WHT
COM.
BLK
3
NOTE:
The neutral (WHT) wire must be
connected to the terminal with "N"
mark on the power supply cord.
POWER SUPPLY 
CORD 120V 60Hz
N.O.
COM.
OUTER CASE 
SWITCH (Lower)
WHT
WHT
WHT
45
RECTIFIER H.V.
HIGH VOLTAGE
MAGNETRON
HIGH VOLTAGE COMPONENTS
RED
GRY
GRY
CAPACITOR
POWER 
TRANSFORMER
6
A
B
C
D
BLK
WHT
OVEN LAMP 
AND SOCKET
E
Hot (BLK) wire must be
NOTE:
F
GRY
N.O.
DOOR
SENSING
SWITCH
G
AH SENSOR ( for R-330AK/AW only)
BLUE MARK
THERMAL CUT-OUT (MG.)
connected to the terminal
with blue mark on the
oven light socket.
GRN
COM.
GRY
BLK
GRN
BLK
CN-A
BLK 1
D
BLK
BLK
GRY
WHT
BLK
BLK
WHT
FAN MOTOR
TURNTABLE
MOTOR
BLK
2
3 WHT
&
FUSE
HOLDER
BLK
RY2 (COM)
BLK
RED
RED
RY2 (N.O.)
RED
WHT
N.C.
COM.
WHT
NO
MONITOR
SWITCH
SECONDARY
GRY
WHT
COM.
INTERLOCK
SWITCH
WHT
one "FW-VZB572WRE0" and both wire harness are
interchangeable.
NOTE: The parts number of the main wire harness is the same as old
E
Figure S-1. Pictorial Diagram
F
G
BLK
RED
WHT
CN-F
123
H
CONTROL UNIT
1
R-330AK/AW
CN-G
CN-F
IC1
1 2 3
SH-A
SH-B
RY1
2
RY2
T1
PRIMARY
INTERLOCK 
RELAY
N.O.
1
CN-A
3
COM.
CONTROL UNIT
3
10
SH-A
R-310AK
CN-G
IC1
SH-B
RY1
RY2
T1
PRIMARY
INTERLOCK 
RELAY
N.O.
CN-A
1
3
COM.
45
H
6
Page 13
R-310AK R-330AK R-330AW
1
A
B
AC
C
D
2
A 3
VRS1
a
b
d
c
1
2
(J1)
3
D1-D4
T1
11ES1
3
D3
4
D4
VR
RY1
LD1-LD5
D1
D2
45
LD1 LD2 LD3 LD4 LD5
WH-1
V
R
R4 27
D5
C1 0.1µ/50v
D6
+ –
Q2 2SA933
R5 4.7k
C2 1000µ/25v
R3 910 1/2w
SP1
C 1
C 2
C 3
C 4
C 5
6
A
B
C
D
TURNTABLE MOTOR OVEN LAMP FAN MOTOR
E
MICRO
AC
F
G
A 1
N.O.
COM
RY2
D7
R6 3.3k
C 6
C 7
D8
E
C 8
C 9
Q3 KRC243M
F
SH-B
B 1
+
C5 10µ/35v
–
B 2
SH-A
G
J2
VR
H
1
NOTE
Figure S-2(a). Power Unit Circuit (R-310AK)
2
: IF NOT SPECIFIED, 1/4w ± 5% : IF NOT SPECIFIED, 1SS270A
3
45
11
H
6
Page 14
R-310AK R-330AK R-330AW
1
A
B
AC
C
D
2
A 3
VRS1
a
b
d
c
1
2
(J1)
3
T1
3
D3
4
D4
V
R
RY1
D1-D4 11ES1
LD1-LD5
D1
D2
45
LD1 LD2 LD3 LD4 LD5
WH-1
R
V
R4 27
D5
C1 0.1µ/50v
D6
+ –
Q2 2SB1238
R5 4.7k
ZD1
R1 2.4k
C2 1000µ/35v
HZ16-1
Q1
C3 0.1µ/50v
+ –
C4 10µ/35v
R3 510
2SB1238
R2 680 1/2w
SP1
C 1
C 2
C 3
1/2w
C 4
C 5
6
A
B
C
D
TURNTABLE MOTOR OVEN LAMP FAN MOTOR
E
MICRO
AC
F
G
A 1
N.O.
COM
RY2
D7
R6 3.3k
C 6
C 7
E
D8
C 8
C 9
Q3 KRC243M
F
SH-B
B 1
+
C5 10µ/35v
–
B 2
SH-A
G
J2
V
R
H
1
NOTE
Figure S-2(b). Power Unit Circuit (R-330AK/AW)
2
: IF NOT SPECIFIED, 1/4w ± 5% : IF NOT SPECIFIED, 1SS270A
3
45
12
H
6
Page 15
R-310AK R-330AK R-330AW
1
A
B
LIQUID CRYSTAL DISPLAY
C
D
E
ON DEF. LBS. QTY. CHECK
0.1µ/50v C13
2SA1037AK Q10
R10 1k
+
2
C1 C2 C3
 S12 S11 S10 S9 S8 S7 S6 S5 S4 S3 S2 S1
R11 15k
UDZ4.3B ZD10
C11 47µ/16v
–
C10 0.01µ/25v
D10
3
45
6
A
R51 15k
0.01µ/25v C70
VDD
421
SEG 0
COM 4
COM 3
40
SEG 1
SEG 2
COM 2
COM 1
5
SEG 3
SEG 4
VLC
HOLD
SEG 5
SEG 6
/50v 33p
C71
RESET
35
SEG 7
X IN
X OUT
10
SEG 8
SEG 9
R71 10kF
R92
R91
R90
R83
30
R60
R61
SEG10
SEG11
R82
15
R62
R81
R73
R72
R70
INT 2
PULSE
22
25
IC1 IZA758DR
21
R63
VSS
AIN0
AIN1
AIN2
AIN3
R52 15k
R53 15k
R54 15k
C 6 C 5 C 4 C 3 C 2 C 1
R55 15k
C 7
R56 15k
C 8
POPCORN
54321
C 9
C10
C61 330p/50v
DINNER
REHEAT
CASSE-
FRESH
VEGETA-
COMPU
09876
START
MINUTE
STOP
PLATE
CLEAR
BAKED
POTATO
BEVERAGE
FRESH
ROLL / 
ROLE
BLE
FROZEN
ROLL / 
TIMER
CLOCK
DEFROST
PLUS
LEVEL
POWER
C12
C11
MUFFIN
MUFFIN
KEY UNIT
B
C
C62 330p/50v C63 330p/50v C64 330p/50v
R61 220k
(J14)(J15)
R62 220k R63 220k R64 220k
D
(J12)(J13) (J10)(J11)
R57 15k
R58 15k
R59 15k
: 4.7k x 3 (J11),(J13),(J15)
R60 15k
R20 15k
0.01µ/25v
C12 0.01µ/25v
C40
R41 4.7k
R40 15k
E
Figure S-3(a). CPU Unit Circuit (R-310AK)
F
G
C 1
NC
C 2
GND
H
1
R14 15k
C 3
VC
2
R13 15k
INT
Q30
KRA101S
C20
R12 15k
C 4
C 5
BUZZER
3
0.1µ/50v
C 6
RY1
13
Q20
KRA101S
Q22
KRA105S
: IF NOT SPECIFIED, 1/10w ± 5%
D20
D40
: IF NOT SPECIFIED, 1SS355
NOTEH
C 7
C 8
C 9
RY2
(RY3)
DOOR
SWITCH
45
F
G
H
6
Page 16
R-310AK R-330AK R-330AW
1
A
B
LIQUID CRYSTAL DISPLAY
C
D
COOK SENSOR LBS KG DEF HELP
S0 S1 S2 S3 S4 S26 S25 S24 S23 S22 S21 S20 S19 S5 S6 S7
S8 S9
S10 S11 S12 S13 S14 S15 S16
C0 C1 C2 C3
2
3
45
6
R67 15k
G 1
HELP
STOP
LEVEL
CLEAR
POWER
G 6 G 5 G 4 G 3 G 2
G 7
G 8
C60 330p/50v C61 330p/50v C62 330p/50v
C63 330p/50v R72 100k R73 100k
CUSTOM
BAKED
POPCORN
REHEAT
FROZEN
1
2 34
5
G 9
FRESH
POTATO
FRESH
DINNER
6 7 8
9 0
VEG
HARD
VEG
SOFT
SOUP
MEAT
GROUND
VEG
FROZEN
PLUS
MINUTE
TIMER
START
KITCHEN
G11 G10
FISH
SEAFOOD
COOK
COMPU
RICE
COMPU
DEFROST
HOT DOG
CLOCK
ON
TOUCH
G12
KEY UNIT
R66 15k
R65 15k
R64 15k
R63 15k
80
81
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0
VCC
VREF AVSS COM3 COM2 COM1 COM0
VL3 VL2
C2
100
C1 SEG10
VL1
AN7
AN6
AN5
AN4
AN3
AN2
C11 0.1µ/50v
1
AN1
IC1 IZA757DR
P57
P56
P55
P54
P53
P52
AN0
P51
SEG33
P50
P47
P46
P45
P44
P43
P41
INT0
SEG34
SEG35
P40
A.B.
SEG36
SEG37
P77
P76
C.
D.E.F.
SEG38
SEG39
P75
P74
51
50
P16 P17 P20 P21 P22 P23 P24 P25 P26 P27 VSS
XOUT
XIN
P80
P81
RESET P70 P71 P72 P73
31
30
4.7k R50
1M R80
R62 15k
R61 15k
R60 15k
A. B.
CF1
CST4.00MGW
R74 100k
R104 47k
R75 100k
A
B
C
D
(J17) (J15)
(J13) (J11)
E
F
G
C 1
R14 10k
R10 1k
+
C 2
R13 10k
2SA1037AK Q10
C10 47µ/16v
–
(J16 ) 4.7k
C30
(J14) 4.7k
(J12) 4.7k (J10) 4.7k
R12 10k
0.1µ/50v C12
R11 4.7k
ZD10 UDZ4.3B
C 3
R30 4.7k
C14
R15 4.7k
0.1µ/50v C13
C 4
R31 15k
Q40
KRA101S
Q11
KRA101S
C 5
C20
C103
IC2
BA4558
C 6
C104
IC2
+
R101
D101
MA152
WA
0.1µ/50v
3.57kD R112
0.1µ/50v
Q20 KRA101S
R103 10k
0.015µ/25v
C102
-
1.8kF
C101
3.32kD R105
C 7
R102 360kF
R108 300kF
R107 620kF
R106 47k
330 1w R90
Q22
KRA105S
D22
D30
C 8
C 9
C.D.E.
R110 75kF
R109 150kF
R111 37.4kF
F-2 F-3 F 1
F.
R71 15k
AH SENSOR
NOTE
R70 15k
R69 15k
R68 15k
: IF NOT SPECIFIED 1/10w ± 5%
: IF NOT SPECIFIED 1SS355
: IF NOT SPECIFIED 0.01µF/25v
E
Figure S-3(b). CPU Unit Circuit (R-330AK/AW)
F
G
VA
GND
H
1
VC
INT
BUZZER
2
RY1
RY2
3
14
(RY3)
DOOR
SWITCH
45
H
6
Page 17
R-310AK R-330AK R-330AW
1
A
B
C
D
D7
0
SP1
2
3
45
LD1 LD2 LD3 LD4 LD5
DIP
1
CN - C
R5
2
3
9
D5
(C4)
R3
R6
4 5
(R2/J4)
(D9)
D8
BE
C5
Q3
(J3)
(J2)
6
D6
E
B
(ZD1)
0
0
R4
(C3)
C2
B
(Q1)
(R1)
WH-1
12
E
1
Q2
1
SH-B
1
(CN - B)
DOOR SW
WH-1
2
SH-A (GREEN)
2
6
A
B
C
D
OL FM AC
E
TTM
F
CN - A
G
H
RY1
13
13
T1
(1) (3)
VRS1
VH
XH
(COM)
AC
HVT
RY2
(J1)
DU
LOT NO.
1
3
OMIF
F
(7) (4)
OMIF
DU
E
7
6
C1 D4 D2 D1
4
D3
F
(RY3)
G
H
1
Figure S-4. Printed Wiring Board of Power Unit
2
3
45
15
6
Page 18
R-310AK R-330AK R-330AW
PARTS LIST FOR CONTROL PANEL
REF. NO. PART NO. DESCRIPTION Q'TY CODE
CONTROL PANEL PARTS
3- 1 CPWBFA722WRK0 Power unit [R-310AK] 1 BB 3- 1 CPWBFA723WRK0 Power unit [R-330AK] 1 BD 3- 1 CPWBFA723WRK0 Power unit [R-330AW] 1 BD 3- 1A QCNCMA394DRE0 2-pin connector (CN-A) 1 AD 3- 1B QCNCMA422DRE0 9-pin connector (CN-C) 1 AF 3- 1C FW-VZA195DRE0 Switch harness A (SN-A) 1 AD 3- 1D FW-VZA197DRE0 Switch harness B (SN-B) 1 AD 3- 1E FW-VZA196DRE0 Lead wire harness (WH-1) 1 AD 3- 1F LHLD-A171WRF0 LED holder 1 AE C1 RC-KZA087DRE0 Capacitor 0.1uF 50V 1 AB C2 VCEAB31EW108M Capacitor 1000uF 25V [R-310AK] 1 AE C2 VCEAB31VW108M Capacitor 1000uF 35V [R-330AK] 1 AF C2 VCEAB31VW108M Capacitor 1000uF 35V [R-330AW] 1 AF C3 RC-KZA087DRE0 Capacitor 0.1uF 50V [R-330AK] 1 AB C3 RC-KZA087DRE0 Capacitor 0.1uF 50V [R-330AW] 1 AB C4-5 VCEAB31VW106M Capacitor 10uF 35V [R-330AK] 2 AA C4-5 VCEAB31VW106M Capacitor 10uF 35V [R-330AW] 2 AA C5 VCEAB31VW106M Capacitor 10uF 35V [R-310AK] 1 AA D1-4 VHD11ES1///-1 Diode (11ES1) 4 AB D5-8 VHD1SS270A/-1 Diode (1SS270ATA) 4 AA LD1-5 VHPSLZ381A9-3 Light emitting diode 5 AC Q1-2 VS2SB1238//-3 Transistor (2SB1238) [R-330AK] 2 AA Q1-2 VS2SB1238//-3 Transistor (2SB1238) [R-330AW] 2 AA Q2 VS2SA933S//-3 Transistor (2SA933) [R-310AK] 1 AB Q3 VSKRC243M//-3 Transistor (KRC243M) 1 AB R1 VRD-B12EF242J Resistor 2.4k ohm 1/4W [R-330AK] 1 AA R1 VRD-B12EF242J Resistor 2.4k ohm 1/4W [R-330AW] 1 AA R2 VRD-B12HF681J Resistor 680 ohm 1/2W [R-330AK] 1 AA R2 VRD-B12HF681J Resistor 680 ohm 1/2W [R-330AW] 1 AA R3 VRD-B12HF911J Resistor 910 ohm 1/2W [R-310AK] 1 AA R3 VRD-B12HF511J Resistor 510 ohm 1/2W [R-330AK] 1 AB R3 VRD-B12HF511J Resistor 510 ohm 1/2W [R-330AW] 1 AB R4 VRD-B12EF270J Resistor 27 ohm 1/4W 1 AA R5 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA R6 VRD-B12EF332J Resistor 3.3k ohm 1/4W 1 AA RY1 RRLY-A021DRE0 Relay (OJSH112LM-UL) [R-310AK] 1 AH RY1 RRLY-A075DRE0 Relay (OJE-SS-124LM) [R-330AK] 1 AG RY1 RRLY-A075DRE0 Relay (OJE-SS-124LM) [R-330AW] 1 AG RY2 RRLY-A076DRE0 Relay (OMIF-S-124LM) [R-330AK] 1 AK RY2 RRLY-A076DRE0 Relay (OMIF-S-124LM) [R-330AW] 1 AK RY2 RRLY-A094DRE0 Relay (OMIF-S-112LM) [R-310AK] 1 AN SP1 RALM-A014DRE0 Buzzer (PKM22EPT-THAI) 1 AG T1 RTRNPA110DRE0 Transformer [R-310AK] 1 AN T1 RTRNPA111DRE0 Transformer [R-330AK] 1 AP T1 RTRNPA111DRE0 Transformer [R-330AW] 1 AP VRS1 RH-VZA032DRE0 Varistor (10G471K) 1 AE ZD1 VHEHZ161///-1 Zener diode (HZ16-1) [R-330AK] 1 AA ZD1 VHEHZ161///-1 Zener diode (HZ16-1) [R-330AW] 1 AA 3- 2 DPWBFB611WRK0 CPU unit [R-310AK] 1 BA 3- 2 DPWBFB616WRK0 CPU unit [R-330AK] 1 BF 3- 2 DPWBFB616WRK0 CPU unit [R-330AW] 1 BF 3- 3 FPNLCB279WRK0 Control panel frame with key unit [R-330AW] 1 BC 3- 3 FPNLCB280WRK0 Control panel frame with key unit [R-330AK] 1 BC 3- 3 FPNLCB281WRK0 Control panel frame with key unit [R-310AK] 1 BC 3- 3- 1 FUNTKA793WRE0 Key unit [R-330AW] 1 AZ 3- 3- 1 FUNTKA794WRE0 Key unit [R-330AK] 1 AZ 3- 3- 1 FUNTKA795WRE0 Key unit [R-310AK] 1 AZ 3- 4 PSHEPA588WRE0 LED sheet 1 AM 3- 5 JBTN-B028WRF0 Open button [R-330AK] 1 AG 3- 5 JBTN-B029WRF0 Open button [R-330AW] 1 AG 3- 5 JBTN-B028WRF0 Open button [R-310AK] 1 AG 3- 6 MSPRCA050WRE0 Open button spring 1 AB 3- 7 XEPSD30P08XS0 Screw: 3mm x 8mm 4 AA
16
Page 19
INFORMATION FOR PARTS CHANGING (R-310AK)
Interchangeability
OLD NEWA. OLD NEWB. OLD NEWC. OLD NEWD.
R-310AK R-330AK R-330AW
REF.NO.
1- 8 2- 4 2- 4 2- 5 3 4-19 4-20 4-21 5 5- 9 5-10 5-11 6- 2 6- 8 7- 3 7- 6
REPLACEMENT PART NO.
DESCRIPTION OLD No. Q'ty NEW No. Q'ty
Magnetron Foot Foot Leg Control Panel Parts Cushion MG. air guide Cushion Door assembly Screw Cushion Screw Turntble tray Instruction book Screw Screw
RV-MZA197WRE0 1 RV-MZA271WRE0 1 A BL Jan./ 1997 GLEGPA006WRE0 1 GLEGPA023WRE0 1 A AB Dec./ 1996 GLEGPA023WRE0 1 GLEGPA019WRE0 1 C AD Aug./ 1997 GLEGPA067WRE0 2 GLEGPA067WRF0 2 A AE Mis-print
Refer to "PARTS LIST " on page 16 D Jan./ 1997
PCUSUA278WRP0 1 DELETE - D -- Jan./ 1997 PGGIDHA058WRP0 1 DELETE - D -- Jan./ 1997 PPACGA041WRE0 1 PCUSGA399WRE0 1 C AG Aug./ 1996 ADD - CDORFA754WRK0 1 A BH Jan./ 1997 XCPSD40P06000 2 XCPSD40P08000 1 C AA Jan./ 1997
ADD - PCUSUA481WRP0 1 C AB Aug./ 1996 ADD - XCPSD40P08WN2 1 C AC Jan./ 1997
NTNT-A079WRE0 1 NTNT-A084WRE0 1 A AR Jan./ 1997 TCADCA611WRR0 1 TCADCA630WRR0 1 C AF Jan./ 1997 XHTSD40P08RV0 4 XHTSD40P08RV0 3 D AA Jan./ 1997 XOTSD40P12000 12 XOTSD40P12000 14 C AA Aug./ 1996
INTER­CHANGE­ABILITY
CODE
EFFEC TIVE FROM
17
Page 20
R-310AK R-330AK R-330AW
1
2
OVEN AND CABINET PARTS FOR R-310AK
A
4-18
1-11
B
C
4-17
4-9
1-4
6-7
1-10
3
7-5
7-3
4-10
7-2
1-13
45
2-1
7-1
6-9
1-8
4-16
6
7-5
A
7-5
B
7-7
C
6-6
D
4-7
E
4-12
4-14
F
2-2
G
7-6
2-4
7-6
2-5
1-12
4-22
7-1
4-11
7-5
7-5
1-1
4-15
1-1
4-13
4-2
1-14
4-3
4-1
4-21
2-3
7-6
1-9
7-5
7-3
1-1
1-1
1-5
7-1
7-6
6-1
1-2
4-4
1-3
1-6
4-6
7-4
1-7
4-5
7-1
4-8
D
E
7-3
F
7-6
6-2
G
H
1
7-6
7-6
2
7-6
7-6
7-6
2-4
3
18
45
H
6
Page 21
R-310AK R-330AK R-330AW
1
2
3
45
CONTROL PANEL, DOOR AND MISCELLANEEOUS PARTS FOR R-310AK
3-7
A
3-1F
3-4
3-2
3-7
3-3
B
3-7
C
3-3-1
5-5
3-1
5-8
6
A
B
C
3-5
D
5
E
5-3
F
G
3-6
5-10
5-4
5-1
5-7
5-11
5-2
D
5-9
E
F
5-6
G
H
Actual wire harness may be different from illustration.
1
6-3
2
(HIGH VOLTAGE TRANSFORMER)
6-4
6-5
3
19
(CAPACITOR)
45
H
6
Page 22
R-310AK R-330AK R-330AW
INFORMATION FOR PARTS CHANGING (R-330AK/AW)
Interchangeability
OLD NEWA. OLD NEWB. OLD NEWC. OLD NEWD.
REPLACEMENT PART NO.
REF.NO.
1- 8 1-14 1-15 AH sensor assembly FDTCTA173WRK0 1 FDTCTA176WRK0 1 D AV Jan./ 1997 2- 1 2- 4 2- 4 2- 5 3 4-17 4-19 4-20 4-21 4-23 4-24 4-25 5 5 5- 9 5-10 5-11 6- 8 7- 2 7- 3 7- 5 7- 6
DESCRIPTION OLD No. Q'ty NEW No. Q'ty
Magnetron Power transformer
Outer case cabinet (R330AW) Foot Foot Leg Control Panel Parts Cushion Cushion MG. air guide Cushion Sensor mounting angle Cushion Cushion Door assembly Door assembly Screw Cushion Screw Instruction book Screw Screw Screw Screw
(R330AK) ADD - CDORFA753WRK0 1 A BH Jan./ 1997 (R330AW) ADD - CDORFA755WRK0 1 A BH Jan./ 1997
RV-MZA197WRE0 1 RV-MZA267WRE0 1 A BL Jan./ 1997 RTRN-A508WRE0 1 RTRN-A525WRE0 1 A BM Feb./ 1997
GCABUA584WRT0 1 GCABUA608WRP0 1 A BB Jan./ 1997 GLEGPA006WRE0 1 GLEGPA023WRE0 1 A AB Dec./ 1996 GLEGPA023WRE0 1 GLEGPA019WRE0 1 C AD Aug./ 1997 GLEGPA067WRE0 1 GLEGPA067WRF0 1 C AE Mis-print
Refer to "PARTS LIST " on page 16 D Jan./ 1997
PCUSUA235WRP0 1 DELETE - D -- Jan./ 1997 PCUSUA278WRP0 1 DELETE - D -- Jan./ 1997 PGIDHA058WRP0 1 DELETE - D -- Jan./ 1997 PPACGA041WRE0 1 PCUSGA399WRE0 1 C AG Jan./ 1997 PCOVPA254WRP0 1 LANGTA338WRP0 1 D AP Jan./ 1997
ADD - PCUSUA192WRP0 1 D AD Jan./ 1997 ADD - PCUSUA329WRP0 1 D AC Jan./ 1997
XCPSD40P06000 2 XCPSD40P08000 1 C AA Jan./ 1997 ADD 1 PCUSUA481WRP0 1 C AB Aug./ 1996 ADD 1 XCPSD40P08WN2 1 C AC Jan./ 1997
TCADCA610WRR0 1 TCADCA631WRR0 1 C AG Jan./ 1997 XFPSD30P06000 2 XFPSD30P06000 3 D AA Jan./ 1997 XHTSD40P08RV0 4 XHTSD40P08RV0 3 D AA Jan./ 1997 XOTSD40P12RV0 10 XOTSD40P12RV0 9 D AA Jan./ 1997 XOTSD40P12000 12 XOTSD40P12000 14 C AA Aug./ 1996
INTER­CHANGE­ABILITY
CODE
EFFEC TIVE FROM
20
Page 23
R-310AK R-330AK R-330AW
1
2
OVEN AND CABINET PARTS FOR R-330AK/AW
A
4-18
B
C
1-15
7-2
4-24
4-23
1-11
4-9
1-4
6-7
7-5
3
7-5
1-10
4-10
7-2
1-13
45
2-1
7-1
7-3
6-9
1-8
4-16
6-6
7-5
6
A
7-5
B
7-7
C
D
4-25
4-7
6-10
E
4-12
4-14
F
G
7-6
2-4
7-6
2-2
2-5
1-12
4-22
7-1
4-11
7-5
7-5
1-1
1-1
4-15
4-13
4-2
1-14
4-3
4-1
4-21
2-3
7-6
7-5
1-9
1-5
7-3
1-1
1-1
7-1
6-1
7-6
1-2
4-4
1-3
1-6
4-6
7-4
1-7
4-5
7-1
4-8
6-2
7-6
D
E
7-3
F
G
H
1
7-6
2
7-6
7-6
7-6
2-4
3
21
7-6
45
H
6
Page 24
R-310AK R-330AK R-330AW
1
2
3
45
CONTROL PANEL, DOOR AND MISCELLANEEOUS PARTS FOR R-330AK/AW
3-7
A
3-1F
3-4
3-7
3-7
5-11
B
3-3-1
C
D
3-5
3-2
3-3
3-6
5-2
5-5
3-1
5-8
6
A
B
C
5
D
5-9
E
F
G
6-3
H
5-3
5-10
5-4
5-1
6-4
5-6
5-7
(HIGH VOLTAGE TRANSFORMER)
E
F
G
(CAPACITOR)
H
Actual wire harness may be different from illustration.
1
2
6-5
3
22
45
'97 SHARP CORP. (1K4.160E) Printed in U.S.A
6
Page 25
SER VICE MANU AL
S8605R330APK/
MICROWAVE OVEN
R-310AK R-330AK R-330AW
MODELS
R-310AK R-330AK R-330AW
R-330AW
TABLE OF CONTENTS
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICE TO
BEFORE SERVICING ...........................................................................................................................................1
MICROWAVE MEASUREMENT PROCEDURE ...................................................................................................2
FOREWORD.......................................................................................................................................................... 3
PRODUCT SPECIFICATIONS ..............................................................................................................................4
GENERAL INFORMATION................................................................................................................................... 4
OPERATION..........................................................................................................................................................6
TROUBLESHOOTING GUIDE ..............................................................................................................................9
TEST PROCEDURE ............................................................................................................................................11
TOUCH CONTROL PANEL .................................................................................................................................17
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................24
PICTORIAL DIAGRAM ........................................................................................................................................29
CONTROL PANEL CIRCUIT ...............................................................................................................................31
PRINTED WIRING BOARD .................................................................................................................................33
PARTS LIST FOR R-310AK ................................................................................................................................35
PACKING AND ACCESSORIES FOR R-310AK .................................................................................................39
PARTS LIST FOR R-330AK/AW .........................................................................................................................40
PACKING AND ACCESSORIES FOR R-330AK/AW ..........................................................................................45
In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used.
Page
SHARP ELECTRONICS CORPORATION
Service Headquarters: Sharp Plaza, Mahwah, New Jersey 07430-2135
Page 26
R-310AK R-330AK R-330AW
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
(a) Do not operate or allow the oven to be operated with the door open. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwave source, and make repairs as necessary: (1) interlock operation (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5) evidence of dropping or abuse.
(c) Before turning on microwave power for any service test or inspection within the microwave generating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave
generation and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is released to the owner.
(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be
performed on each oven prior to release to the owner.
R-310AK
Page 27
BEFORE SERVICING
Before servicing an operative unit, perform a microwave emission check as per the Microwave Measurement Procedure outlined in this service manual. If microwave emissions level is in excess of the specified limit, contact SHARP ELECTRONICS CORPORATION immediately @1-800-237-4277.
If the unit operates with the door open, service person should 1) tell the user not to operate the oven and 2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administration's Center for Devices and Radiological Health immediately.
Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit found with emissions in excess of 4mW/cm2. The owner of the unit should be instructed not to use the unit until the oven has been brought into compliance.
R-310AK R-330AK R-330AW
1
Page 28
R-310AK R-330AK R-330AW
MICROWAVE MEASUREMENT PROCEDURE
A. Requirements:
1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed 1mW/cm2 at any point 5cm or more from the external surface of the oven, measured prior to acquisition by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2 at any point 5cm or more from the external surface of the oven.
2) Safety interlock switches Primary interlock relay and door sensing switch shall prevent microwave radiation emission in excess of the requirement as above mentioned, secondary interlock switch shall prevent microwave radiation emission in excess of 5 mW/cm2 at any point 5cm or more from the external surface of the oven.
B. Preparation for testing: Before beginning the actual measurement of leakage, proceed as follows:
1) Make sure that the actual 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, 21 CFR 1030.10(c)(3)(i), must be used for testing.
2) Place the oven tray in the oven cavity.
3) Place the load of 275±15 ml (9.8 oz) of tap water initially at 20±5˚C (68˚F) in the center of the oven cavity.
The water container shall be a low form of 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm (3-1/2 in.) and made of an electrically nonconductive 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) Set the cooking control on Full Power Cooking Mode
5) Close the door and select a cook cycle of several minutes. If the water begins to boil before the survey is completed,
replace it with 275 ml of cool water.
C. Leakage test:
Closed-door leakage test (microwave measurement)
1) Grasp the probe of the survey instrument and hold it perpendicular to the gap between the door and the body of the oven.
2) Move the probe slowly, not faster than 1 in./sec. (2.5 cm/sec.) along the gap, watching for the maximum indication on the meter.
3) Check for leakage at the door screen, sheet metal seams and other accessible positions where the continuity of the metal has been breached (eg., around the switches, indicator, and vents). While testing for leakage around the door pull the door away from the front of the oven as far as is permitted by the closed latch assembly.
4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW/cm2, and that the secondary interlock switch does turn the oven OFF before any door movement.
NOTE: After servicing, record data on service invoice and microwave leakage report.
2
Page 29
SERVICE MANUAL
MICROWAVE OVEN
PRODUCT DESCRIPTION
R-310AK R-330AK R-330AW
R-310AK / R-330AK / R-330AW
FOREWORD
This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Informa­tion for the SHARP MICROWAVE OVENS, R-310AK, R­330AK, R-330AW.
It is recommended that service personnel carefully study the entire text of this manual so that they will be qualified to render satisfactory customer service.
Check the interlock switches and the door seal carefully. Special attention should be given to avoid electrical shock and microwave radiation hazard.
GENERAL INFORMATION
OPERATION
TROUBLESHOOTING GUIDE AND TEST PROCEDURE
TOUCH CONTROL PANEL
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WIRING DIAGRAM
SHARP ELECTRONICS CORPORATION
SHARP PLAZA, MAHWAH,
NEW JERSEY 07430-2135
PARTS LIST FOR R-310AK
PARTS LIST FOR R-330AK/AW
3
Page 30
R-310AK R-330AK R-330AW
SPECIFICATION
ITEM DESCRIPTION
Power Requirements 120 Volts / 13.0 Amperes
60 Hertz Single phase, 3 wire grounded
Power Output 1000 watts (IEC-705 TEST PROCEDURE)
Operating frequency of 2450MHz
Case Dimensions Width 20-1/2"
Height 11-7/8" Depth 15-7/8"
Cooking Cavity Dimensions Width 13-3/4"
Height 8-3/8"
0.9 Cubic Feet Depth 14-7/8" Control Complement Touch Control System
Clock ( 1:00 - 12:59 ) Timer (0 - 99 min. 99 seconds)
Microwave Power for Variable Cooking Repetition Rate;
P-HI..................................................Full power throughout the cooking time
P-90 ....................................................................approx. 90% of Full Power
P-80 ....................................................................approx. 80% of Full Power
P-70 ....................................................................approx. 70% of Full Power
P-60 ....................................................................approx. 60% of Full Power
P-50 ....................................................................approx. 50% of Full Power
P-40 .....................................................................approx. 40% of Full Power
P-30 .....................................................................approx. 30% of Full Power
P-20 ....................................................................approx. 20% of Full Power
P-10 .....................................................................approx. 10% of Full Power
P-0 .................................................... No power throughout the cooking time
R-330AK/ R-330AW R-310AK
CUSTOM HELP pad INSTANT ACTION pads COMPU DEFROST pad COMPU DEFROST pad INSTANT SENSOR pad Number selection pads MINUTE PLUS pad POWER LEVEL pad COMPU COOK pad TIMER/CLOCK pad SNACKS & REHEAT pad STOP/CLEAR pad Number selection pads START/MINUTE PLUS pad POWER LEVEL pad CLOCK pad KITCHEN TIMER pad STOP/CLEAR pad START/TOUCH ON pad
Oven Cavity Light Yes Safety Standard UL Listed FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
GENERAL INFORMATION
GROUNDING INSTRUCTIONS
This oven is equipped with a three prong grounding plug. It must be plugged into a wall receptacle that is properly installed and grounded in accordance with the National Electrical Code and local codes and ordinances. In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the electric current.
WARNING: Improper use of the grounding plug can result in a risk of electric shock.
4
Page 31
R-310AK R-330AK R-330AW
Electrical Requirements The electrical requirements are a 115 -120 volt 60 Hz, AC only, 15 or 20 amp. fused electrical supply. It is recommended that a separate
3-Pronged Plug
Grounded Receptacle Box
circuit serving only this appliance be provided. When installing this appliance, observe all applicable codes and ordinances. A short power-supply cord is provided to reduce risks of becoming entangled in or tripping over a longer cord. Where a two-pronged wall-receptacle is encountered, it is the personal responsibility and obligation of the customer to contact a qualified
Grounding Pin
electrician and have it replaced with a properly grounded three-pronged wall receptacle or have a grounding adapter properly grounded and polarized. If an extension cord must be used, it should be a 3-wire, 15
3-Pronged Receptacle
amp. or more cord. Do not drape over a countertop or table where it can be pulled on by children or tripped over accidentally.
CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE ROUND GROUNDING PRONG FROM
THIS PLUG
1. One touch door open button. Push to open door.
2. Door latches. The oven will not operate unless the door is securely closed.
3. Removable turntable support.
4. Removable turntable. The turntable will rotate clockwise or counterclockwise.
5. Oven lamp. It will light when oven is operating.
6. Oven door with see-through window.
7. Ventilation openings. (Rear)
8. Auto-Touch control panel.
9. Time display: Digital display, 99 minutes 99 seconds.
10.Coupling.
11.Wave guide cover.
12.Power supply cord
OVEN DIAGRAM
10
11
2
TOUCH CONTROL PANEL
56
7
9
8
12
1
4
3
COOK LBSSENSOR KG DEF HELP
FROZEN
DINNER
RICE
FRESH VEG
SOFT
GROUND
MEAT
COMPU
DEFROST
CLOCK
CUSTOM
HELP
REHEAT
SOUP
FROZEN
VEG HOT
DOG
MINUTE
PLUS
KITCHEN
TIMER
START
TOUCH ON
Interactive
Smart & Easy Sensor Cooking
POPCORN
BAKED
POTATO
FRESH VEG
HARD
FISH,
SEAFOOD
COMPU
COOK
1 2 3 4 5
12345 6789O
6 7 8 9 O
POWER
LEVEL
STOP
CLEAR
Interactive Display: 
Words will light in the display to indicate features and cooking instructions. Always follow the instructions.
DEF. LBS. QTY.
ON
INSTANT ACTION
To adjust quantity-touch pad again
POPCORN
DINNER
PLATE BAKED
POTATO
FRESH
ROLL / MUFFIN
Ground meat
1
Steaks / chops
2
Chicken pieces
3
POWER
LEVEL
STOP
CLEAR
BEVERAGE
REHEAT
CASSEROLE
FRESH
VEGETABLE
FROZEN
ROLL / MUFFIN
COMPU
DEFROST
CLOCK
START
MINUTE PLUS
CHECK
TIMER
Time display
Indicator
R-33AK/ R-330AW R-310AK
5
Page 32
R-310AK R-330AK R-330AW
OPERATION
DESCRIPTION OF OPERATING SEQUENCE
The following is a description of component functions during oven operation.
OFF CONDITION
Closing the door activates door sensing switch and second­ary interlock switch. (In this condition, the monitor switch contacts are opened.) When oven is plugged in, 120 volts A.C. is supplied to the control unit. (Figure O-1).
for R-330AK and R-330AW
1. The display will show , , , , , , and .
To set any program or set the clock, you must first touch the STOP/CLEAR pad. The display will clear, and " : " will appear.
for R-310AK
1. The display will show flashing "88:88".
To set any program or set the clock, you must first touch the STOP/CLEAR pad. The display will clear, and " : " will appear.
COOKING CONDITION
Program desired cooking time by touching the NUMBER pads. Program the power level by touching the POWER LEVEL pad and then a Number pad. When the START pad is touched, the following operations occur:
1. The contacts of relays are closed and components connected to the relays are turned on as follows. (For details, refer to Figure O-2)
RELAY CONNECTED COMPONENTS RY-1 oven lamp/turntable motor/fan motor RY-2 power transformer
2. 120 volts A.C. is supplied to the primary winding of the power transformer and is converted to about 3.2 volts A.C. output on the filament winding, and approximately 2150 volts A.C. on the high voltage winding.
3. The filament winding voltage heats the magnetron filament and the H.V. winding voltage is sent to a voltage doubler circuit.
4. The microwave energy produced by the magnetron is channelled through the waveguide into the cavity feed­box, and then into the cavity where the food is placed to be cooked.
5. Upon completion of the cooking time, the power transformer, oven lamp, etc. are turned off, and the generation of microwave energy is stopped. The oven will revert to the OFF condition.
6. When the door is opened during a cook cycle, monitor switch, door sensing switch, secondary interlock switch and primary interlock relay are activated with the following results. The circuits to the oven lamp, turntable motor, the cooling fan motor, and the high voltage components are de-energized, and the digital read-out displays the
time still remaining in the cook cycle when the door was opened.
7. The monitor switch electrically monitors the operation of the secondary interlock switch and primary interlock relay and is mechanically associated with the door so that it will function in the following sequence.
(1) When the door opens from the closed position, the
primary interlock relay and secondary interlock switch open their contacts. Then the monitor switch contacts close.
(2) When the door is closed from the open position, the
monitor switch contacts open first. Then the contacts of the secondary interlock switch and primary interlock relay close.
If the secondary interlock switch and primary interlock relay fail with the contacts closed when the door is opened, the closing of the monitor switch contacts will form a short circuit through the monitor fuse, secondary interlock switch and primary interlock relay, causing the monitor fuse to blow.
POWER LEVEL P-0 TO P-90 COOKING
When Variable Cooking Power is programmed, the 120 volts A.C. is supplied to the power transformer intermittently through the contacts of relay (RY-2) which is operated by the control unit within a 32 second time base. Microwave power operation is as follows:
VARI-MODE ON TIME OFF TIME Power 10(P-HI) 32 sec. 0 sec.
(100% power) Power 9(P-90) 30 sec. 2 sec.
(approx. 90% power) Power 8(P-80) 26 sec. 6 sec.
(approx. 80% power) Power 7(P-70) 24 sec. 8 sec.
(approx. 70% power) Power 6(P-60) 22 sec. 10 sec.
(approx. 60% power) Power 5(P-50) 18 sec. 14 sec.
(approx. 50% power) Power 4(P-40) 16 sec. 16 sec.
(approx. 40% power) Power 3(P-30) 12 sec. 20 sec.
(approx. 30% power) Power 2(P-20) 8 sec. 24 sec.
(approx. 20% power) Power 1(P-10) 6 sec. 26 sec.
(approx. 10% power) Power 0(P-0) 0 sec. 32 sec.
(0% power)
Note: The ON/OFF time ratio does not correspond with
the percentage of microwave power, because approx. 2 seconds are needed for heating of the magnetron filament.
SENSOR COOKING CONDITION (for R-330AK/AW)
Using the INSTANT SENSOR function, the foods are
6
Page 33
cooked without figuring time, power level or quantity. When the oven senses enough steam from the food, it relays the information to its microprocessor which will calculate the remaining cooking time and power level needed for best results. When the food is cooked, water vapor is developed. The sensor “senses” the vapor and its resistance increases gradually. When the resistance reaches the value set ac­cording to the menu, supplementary cooking is started. The time of supplementary cooking is determined by experi­ment with each food category and inputted into the LSI. An example of how sensor works: (SOUP)
1. Soup at room temperature. Vapor is emitted very slowly.
MICROWAVE
2. Heat Soup. Moisture and humidity is emitted rapidly. You can smell the aroma as it cooks.
SENSOR
MICROWAVE
R-310AK R-330AK R-330AW
3. Sensor detects moisture and humidity and calculates cooking time and variable power.
Cooking Sequence.
1. Touch one of the INSTANT SENSOR pads.
NOTE: The oven should not be operated on INSTANT
SENSOR immediately after plugging in the unit. Wait five minutes before cooking on INSTANT SENSOR.
2. The coil of shut-off relay (RY-1) is energized, the turntable motor, oven lamp and cooling fan motor are turned on, but the power transformer is not turned on.
3. After about 16 seconds, the cook relay (RY-2) is energized. The power transformer is turned on, microwave energy is produced and first stage is started. The 16 seconds is the cooling time required to remove any vapor from the oven cavity and sensor.
NOTE: During this first stage, do not open the door or touch
STOP/CLEAR pad.
4. When the sensor detects the vapor emitted from the food, the display switches over to the remaining cooking time and the timer counts down to zero. At this time, the door may be opened to stir, turn, or season food.
5. When the timer reaches zero, an audible signal sounds. The shut-off relay and cook relay are de-energized and the power transformer, oven lamp, etc. are turned off.
6. Opening the door or touching the STOP/CLEAR pad, the time of day will reappear on the display and the oven will revert to an OFF condition.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED
2. CLOCK APPEARS ON DISPLAY
OUTER CASE SWITCH
120V AC 60 Hz
OUTER CASE SWITCH
MONITOR  FUSE
THERMAL  CUT-OUT (OVEN)
A3
CONTROL UNIT
OL FM
OVEN LAMP
SECONDARY INTERLOCK SWITCH
THERMAL  CUT-OUT (MG.)
(RY-1)
TTM
TURN- TABLE MOTOR
This Circuit is only for R-330AK and R-330AW.
These outer case switches will be used from Oct.
1996 production.
COM.
(RY-2)
PRIMARY INTERLOCK RELAY
BA
DOOR SENSING SWITCH
FAN  MOTOR
N.O.
F3
F2
F1
MONITOR  SWITCH
AH SENSOR
POWER  TRANSFORMER
CAPACITOR
0.94µF
RECTIFIER
MAGNETRON
Figure O-1. Oven Schematic-Off Condition
7
Page 34
R-310AK R-330AK R-330AW
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED
2. COOKING TIME PROGRAMMED
3. VARIABLE COOKING CONTROL "HIGH"
4. "START" PAD TOUCHED
This Circuit is only for R-330AK and R-330AW.
These outer case switches will be used from Oct.
1996 production.
120V AC 60 Hz
OUTER CASE SWITCH
OUTER CASE SWITCH
A3
THERMAL  CUT-OUT (OVEN)
CONTROL UNIT
MONITOR  FUSE
OL FM
OVEN LAMP
SECONDARY INTERLOCK SWITCH
THERMAL  CUT-OUT (MG.)
(RY-1)
TTM
TURN- TABLE MOTOR
COM.
(RY-2)
PRIMARY INTERLOCK RELAY
BA
DOOR SENSING SWITCH
FAN  MOTOR
N.O.
F3
F2
F1
MONITOR  SWITCH
Figure O-2. Oven Schematic-Cooking Condition
AH SENSOR
POWER  TRANSFORMER
CAPACITOR
0.94µF
RECTIFIER
MAGNETRON
DESCRIPTION AND FUNCTION OF COMPONENTS
DOOR OPEN MECHANISM
The door is opened by pushing the open button on the control panel, refer to the Figure D-1. When the open button is pushed, the open button pushes up the switch lever, and then the switch lever pushes up the latch head. The latch heads are moved upward and re­leased from latch hook. Now the door will open.
Door
Latch Hook 
Latch Heads
Switch Lever
Figure D-1. Door Open Mechanism
Door Sensing  Switch
Monitor Switch
Secondary Interlock Switch
DOOR SENSING AND SECONDARY INTERLOCK SWITCHES
The secondary interlock switch is mounted in the lower position of the latch hook and the door sensing switch in the primary interlock system is mounted in the upper position of the latch hook. They are activated by the latch heads on the door. When the door is opened, the switches interrupt the circuit to all components. A cook cycle cannot take place until the door is firmly closed thereby activating both inter­lock switches. The primary interlock system consists of the door sensing switch and primary interlock relay located on the control circuit board.
MONITOR SWITCH
The monitor switch is activated (the contacts opened) by the latch head on the door while the door is closed. The switch is intended to render the oven inoperative, by means of blowing the monitor fuse, when the contacts of the primary interlock relay and secondary interlock switch fail to open when the door is opened.
Functions:
1. When the door is opened, the monitor switch contact close (to the ON condition) due to their being normally closed. At this time the primary interlock relay and
8
Page 35
secondary interlock switch are 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 contacts are first opened and then the door sensing switch and the secondary interlock switch contacts close. (On opening the door, each of these switches operate inversely.)
3. If the door is opened, and the primary interlock relay and secondary interlock switch contacts fail to open, the monitor fuse blows simultaneously with closing of the monitor switch contacts.
CAUTION: BEFORE REPLACING A BLOWN MONITOR
FUSE TEST THE DOOR SENSING SWITCH, PRIMARY INTERLOCK RELAY, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. (RE­FER TO CHAPTER "TEST PROCEDURE").
NOTE: MONITOR FUSE AND MONITOR SWITCH ARE
REPLACED AS AN ASSEMBLY.
OUTER CASE SWITCHES (For the ovens from Oct. 1996 production)
The two outer case switches are mounted near the power supply cord at the oven cavity rear plate. When the outer case cabinet is installed with the screws, one of the screws pushes the actuator and then the actuator pushes the two plungers of outer case switches and their contacts are closed. When a cabinet mounting screw which is pushing the actuator is removed, the two outer case switches inter­rupt the circuit to the all components.
OUTER CASE  CABINET
OUTER CASE SWITCHES
This outer case mounting screw is push­ing the actuator.
ACTUATER
R-310AK R-330AK R-330AW
TURNTABLE MOTOR
The turntable motor rotates the turntable located on the bottom of the oven cavity, so that the foods on the turntable cook evenly during cooking. The turntable may turn in either direction.
COOLING FAN MOTOR
The cooling 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 vapors given off from the heating foods. It is then exhausted through the exhausting air vents at the oven cavity.
MONITOR FUSE
1. The monitor fuse blows when the contacts (COM-NO) of the primary interlock relay and secondary interlock switch remain closed with the oven door open and when the monitor switch closes.
2. If the wire harness or electrical components are short­circuited, this monitor fuse blows to prevent an electric shock or fire hazard.
OVEN THERMAL CUT-OUT
The thermal cut-out, located on the top of the oven cavity, is designed to prevent damage to the oven by fire. If the foods load is overcooked, by either error in cook time or defect in the control unit, the thermal cut-out will open. Under normal operation, the oven thermal cut-out remains closed. However, when abnormally high temperatures are reached within the oven cavity, the oven thermal cut-out will open at 257˚F(125˚C), causing the oven to shut down.
MAGNETRON THERMAL CUT-OUT
The thermal cut-out located near the magnetron is designed to prevent damage to the magnetron if an over heated condition develops in the tube due to cooling fan failure, obstructed air guide, dirty or blocked air intake, etc. Under normal operation, the thermal cut-out remains closed. However, when abnormally high temperatures are reached within the magnetron, the thermal cut-out will open at 203˚F(95˚C) causing the oven to shut down, when the magnetron has cooled to 167˚F (75˚C), the thermal cut-out closes and cook cycle will resume.
TROUBLESHOOTING GUIDE
When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure letter which will be found in the "Test Procedure "section.
IMPORTANT: If the oven becomes inoperative because of a blown monitor fuse, check the monitor switch, primary interlock
relay, door sensing switch and secondary interlock switch before replacing the monitor fuse. If monitor fuse is replaced, the monitor switch must also be replaced. Use part FFS-BA012WRK0 as an assembly.
9
Page 36
R-310AK R-330AK R-330AW
CK = Check / RE = Replace
CONDITION
OFF CONDITION
COOKING CONDITION
SENSOR COOKING CONDITION
FOR
R-330AK/AW
TEST PROCEDURE
AND
POSSIBLE CAUSE
DEFECTIVE PARTS
PROBLEM
Home fuse or circuit breaker blows when power cord is plugged into wall receptacle
Monitor fuse blows when power cord is plugged into wall recepta­cle.
All letters and indicators do not appear in display when power cord is first plugged into wall out­let.
Display does not operate prop­erly when STOP/CLEAR key is touched. (Buzzer should sound and ":" or time of day should ap­pear in display.)
Oven lamp does not light when door is opened.
Oven lamp does not go out when door is closed.
Oven lamp does not light in cook­ing cycle. (Lights when door is opened.)
Oven lamp lights but fan motor and turntable motor do not oper­ate.
Oven does not go into cook cycle when START pad is touched
Oven seems to be operating but little or no heat is produced in oven load. (Food incompletely cooked or not cooked at all at end of cook cycle.)
Oven goes into a cook cycle but extremely uneven heating is pro­duced in oven load (food).
Oven does not cook properly when programmed for Cooking Power 5 mode. (Operates prop­erly on Cooking Power 10 (HIGH) mode.)
Oven goes into COMPU DE­FROST but food is not defrosted well.
AH sensor does not end during Sensor cooking condition. (Oven does not shut off after a cup of water is boiling by sensor cook­ing.
Oven stops at 16 sec. after start­ing.
RERE A B C D E F F G H RERECK J CKCKCK L K M N I O
SHORT IN POWER CORD
SHORT OR OPENED WIRING
MAGNETRON
POWER TRANSFORMER
H.V. RECTIFIER ASSEMBLY
HIGH VOLTAGE CAPACITOR
THERMAL CUT-OUT
PRIMARY INTERLOCK SYSTEM
SECONDARY INTERLOCK SWITCH
MONITOR SWITCH
MONITOR FUSE
OVEN LAMP OR SOCKET
COOLING FAN MOTOR
TURNTABLE MOTOR
TOUCH CONTROL PANEL
WRONG OPERATION
LOW VOLTAGE
DIRTY OVEN CAVITY
RELAY (RY1)
KEY UNIT
COMPU DEFROST
FOIL PATTERN ON PWB.
OUTER CASE SWITCH
AH SENSOR
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TEST PROCEDURES
R-310AK R-330AK R-330AW
PROCEDURE
LETTER
A MAGNETRON ASSEMBLY TEST
HIGH VOLTAGES ARE PRESENT DURING THE COOK CYCLE, SO EXTREME CAUTION SHOULD BE OBSERVED.
DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.
To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check across the magnetron filament leads should indicate less than 1 ohm.
To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads and chassis ground. This test should indicate an infinite resistance. If there is little or no resistance the magnetron is grounded and must be replaced.
Power output of the magnetron can be measured by performing a water temperature rise test. This test should only be used if above tests do not indicate a faulty magnetron and there is no defect in the following components or wiring: silicon rectifier, high voltage capacitor and power transformer. This test will require a 16 ounce (453cc) measuring cup and an accurate mercury thermometer or thermocouple type temperature tester. For accurate results, the following procedure must be followed carefully:
1. Fill the measuring cup with 16 oz. (453cc) of tap water and measure the temperature of the water with a thermometer or thermocouple temperature tester. Stir the thermometer or thermocouple through the water until the temperature stabilizes. Record the temperature of the water.
2. Place the cup of water in the oven. Operate oven at POWER 10(HIGH) selecting more than 60 seconds cook time. Allow the water to heat for 60 seconds, measuring with a stop watch, second hand of a watch or the digital read-out countdown.¡
3. Remove the cup from the oven and again measure the temperature, making sure to stir the thermometer or thermocouple through the water until the maximum temperature is recorded.
4. Subtract the cold water temperature from the hot water temperature. The normal result should be 34.7 to 64.6˚F(19.3 to 35.9˚C) rise in temperature. If the water temperatures are accurately measured and tested for the required time period the test results will indicate if the magnetron tube has low power output (low rise in water temperature) which would extend cooking time or high power output (high rise in water temperature) which would reduce cooking time. Because cooking time can be adjusted to compensate for power output, the magnetron tube assembly should be replaced only if the water temperature rise test indicates a power output well beyond the normal limits. The test is only accurate if the power supply line voltage is 120 volts and the oven cavity is clean.
COMPONENT TEST
B POWER TRANSFORMER TEST
DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.
Disconnect the primary input terminals and measure the resistance of the transformer with an ohmmeter. Check for continuity of the coils with an ohmmeter. On the R x 1 scale, the resistance of the primary coil should be less than 1 ohm and the resistance of the high voltage coil should be approximately 77.5 ohms (for R-330AK/AW)/ 86.5 ohms (for R-310AK); the resistance of the filament coil should be less than 1 ohm.
(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO MEASURE THE FILAMENT AND HIGH VOLTAGE.)
C HIGH VOLTAGE RECTIFIER TEST
DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.
Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance across the terminals and observe, reverse the leads to the rectifier terminals and observe meter reading. If a short is indicated in both directions, or if an infinite resistance is read in both directions, the rectifier is probably defective and should be replaced.
NOTE: Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6.3 volts.
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R-310AK R-330AK R-330AW
TEST PROCEDURES
PROCEDURE
LETTER
D HIGH VOLTAGE CAPACITOR TEST
DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.
If the capacitor is open, no high voltage will be available to the magnetron. Disconnect input leads and check for short or open between the terminals using an ohmmeter. Checking with a high ohm scale, if the high voltage capacitor is normal, the meter will indicate continuity for a short time and should indicate an open circuit once the capacitor is charged. If the above is not the case, check the capacitor with an ohmmeter to see if it is shorted between either of the terminals and case. If it is shorted, replace the capacitor.
E OVEN THERMAL CUT-OUT
A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the temperature of the thermal cut-out reaches approximately 257˚F(125˚C). An open thermal cut-out indicates overheating of the oven, exchange the oven thermal cut-out and check inside of oven cavity and for improper setting of cooking time or operation of control unit. Check for restricted air flow through the vent holes of the oven cavity, especially the cooling fan and air guide.
MAGNETRON THERMAL CUT-OUT
A continuity check across the thermal cut-out terminals should indicate a closed circuit. If the temperature of the magnetron reaches approximately 203˚F(95˚C), the thermal cut-out opens. The thermal cut-out resets automatically below approximately 167˚F (75˚C). An open thermal cut-out indicates overheating of the magnetron. Check for restricted air flow to the magnetron, especially the cooling fan air guide.
CAUTION: IF THE THERMAL CUT-OUT INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE,
REPLACE THERMAL CUT-OUT.
COMPONENT TEST
F SECONDARY INTERLOCK SWITCH AND DOOR SWITCH TEST
Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal of the switch. The meter should indicated an open circuit with the door open and a closed circuit with the door closed. If improper operation is indicated, replace the secondary interlock switch.
PRIMARY INTERLOCK SYSTEM TEST
DOOR SENSING SWITCH Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal of the switch. The meter should indicated an open circuit with the door open and a closed circuit with the door closed. If improper operation is indicated, replace the door sensing switch. NOTE: If the door sensing switch contacts fail in the open position and the door is closed, the cooling
fan, turntable and oven light will be activated by RY1.
PRIMARY INTERLOCK RELAY Disconnect two (2) wire leads from the male tab terminals of the Primary Interlock Relay. Check the state of the relay contacts using a ohmmeter. The relay contacts should be open. If the relay contacts are closed, replace the circuit board entirely or the relay itself.
G MONITOR SWITCH
Disconnect the oven from power supply. Before performing this test, make sure that the secondary interlock switch and the primary interlock relay are operating properly, according to the above Switch Test Procedure. Disconnect the wire lead from the monitor switch (NC) terminal. Check the monitor switch operation by using the ohmmeter as follows. When the door is open, the meter should indicate a closed circuit. When the monitor switch actuator is pushed by a screw driver through the lower latch hole on the front plate of the oven cavity with the door opened (in this condition the plunger of the monitor switch is pushed in), the meter should indicate an open circuit. If improper operation is indicated, the switch may be defective. After testing the monitor switch, reconnect the wire lead to the monitor switch
SCREW DRIVER
(NC) terminal and check the continuity of the monitor circuit.
12
RED
GRY
MONITOR SWITCH
OHMMETER
Page 39
TEST PROCEDURES
R-310AK R-330AK R-330AW
PROCEDURE
LETTER
H BLOWN MONITOR FUSE
If the monitor fuse is blown when the door is opened, check the primary interlock relay, secondary interlock switch and monitor switch according to the "TEST PROCEDURE" for those switches before replacing the blown monitor fuse.
CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE, TEST THE PRIMARY INTERLOCK
RELAY, SECONDARY INTERLOCK SWITCH, DOOR SENSING SWITCH AND MONITOR SWITCH FOR PROPER OPERATION.
If the monitor fuse is blown by improper switch operation, the monitor fuse and monitor switch must be replaced with "monitor fuse and monitor switch assembly" part number FFS-BA012WRK0, even if the monitor switch operates normally. The monitor fuse and monitor switch assembly is comprised of a 20 ampere fuse and switch.
I OUTER CASE SWITCH TEST
Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal of the switch. The meter should indicated an open circuit when its plunger is released and closed circuit when its plunger is pushed. If improper operation is indicated, replace the outer case switch.
J TOUCH CONTROL PANEL ASSEMBLY TEST
The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore, unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeter and ohmmeter. In this service manual, the touch control panel assembly is divided into Liquid crystal display, rubber connector, Control Unit and Key Unit, and troubleshooting by replacement is described according to the symptoms indicated.
1. Key Unit. Note: Check key unit ribbon connection before replacement. The following symptoms indicate a defective key unit. Replace the key unit. a) When touching the pads, a certain pad produces no signal at all. b) When touching a number pad, two figures or more are displayed. c) When touching the pads, sometimes a pad produces no signal.
2. Control Panel The following symptoms indicate a defective control unit. Before replacing the control unit, perform the Key unit test (Procedure K) to determine if control unit is faulty.
2-1 In connection with pads.
a) When touching the pads, a certain group of pads do not produce a signal. b) When touching the pads, no pads produce a signal.
2-2 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. 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.
2-3 Other possible problems 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.
Note: When defective components, the Control Unit or Key Unit are replaced, the defective part or parts
must be properly packed for return in the shipping carton, with its cushion material, in which the new replacement part was shipped to you.
COMPONENT TEST
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Page 40
R-310AK R-330AK R-330AW
TEST PROCEDURES
PROCEDURE
LETTER
K KEY UNIT TEST
If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon is making 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 flat ribbon cable that connects the key 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 Key unit matrix indicated on the control panel schematic and place a jumper wire between the pins that correspond to the STOP/CLEAR pad making momentary contact. If the control unit responds by clearing with a beep the key 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 pad does not respond, the above method may be used (after clearing the control unit) to determine if the control unit or key pad is at fault.
G12 G11 G10 G 9
L RELAY TEST
COMPONENT TEST
G 8 G 7 G 6 G 5 G 4 G 3 G 2 G 1
POPCORN
SOUP
RICE
REHEAT
FROZEN
DINNER
FRESH VEG
SOFT
COMPU
COOK
BAKED
POTATO
FRESH VEG
HARD FISH
SEA FOOD
54321 09876
MINUTE
KITCHEN
TIMER
START
TOUCH
ON
PLUS
CLOCK
FROZEN
VEG HOT
DOG
GROUND
MEAT
COMPU
DEFROST
R-330AK/AW R310AK
CUSTOM
HELP
POWER
LEVEL
STOP
CLEAR
G 8 G 7 G 6 G 5 G 4 G 3 G 2 G 1
54321
BEVERAGE
BAKED
POTATO
POPCORN
DINNER
PLATE
STOP
CLEAR
09876
START
MINUTE
PLUS
POWER
LEVEL
G12 G11 G10 G 9
COMPU
DEFROST
TIMER
CLOOK
FRESH
CASSEROLE
VEGETABLE
FROZEN
ROLL
/ MUFFIN
/ MUFFIN
REHEAT
FRESH
ROLL
Remove the outer case and check voltage between Pin No. 3 of the 2 pin connector (A) and the common terminal of the relay RY2 on the control unit with an A.C. voltmeter. The meter should indicate 120 volts, if not check oven circuit. RY1 and RY2 Relay Test
These relays are operated by D.C. voltage Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.
DC. voltage indicated ............. Defective relay.
DC. voltage not indicated ........ Check diode which is connected to the relay coil. If diode is good, control
RELAY SYMBOL
RY1 Approx. 24.0V D.C. Approx. 15.5V D.C. Oven lamp / Turntable motor / Cooling fan motor RY2 Approx. 23.0V D.C. Approx. 12.0V D.C. Power transformer
M COMPU DEFROST TEST
(1) Place one cup of water in the center of the turntable tray in the oven cavity. (2) Close the door, touch the “ COMPU DEFROST “ pad twice and touch the Number pad “5”. And then
touch the “START” pad. (for R-310AK) Close the door, touch the “ COMPU DEFROST “ pad and touch the Number pad “2”, and touch
Number pad “5”. And then touch the “START” pad. (for R-330AK/AW) (3) The oven is in Compu Defrost cooking condition. (4) The oven will operate as follows
WEIGHT
1ST STAGE 2ND STAGE 3RD STAGE
LEVEL TIME LEVEL TIME LEVEL TIME
0.5lbs 70% 40sec. 50% 38sec. 30% 43sec.
unit is defective.
OPERATIONAL VOLTAGE
R-330AK/AW R-310AK
CONNECTED COMPONENTS
(5) If improper operation is indicated, the control unit is probably defective and should be checked.
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TEST PROCEDURES
R-310AK R-330AK R-330AW
PROCEDURE
LETTER
N PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD
(PWB) IS OPEN
COMPONENT TEST
To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary 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.
STEPS OCCURRENCE CAUSE OR CORRECTION
1 The rated AC voltage is not present between Check supply voltage and oven power cord.
Pin No. 3 of the 2-pin connector (A) and the common terminal of the relay RY2.
2 The rated AC voltage is present at primary Low voltage transformer or secondary circuit defective.
side of low voltage transformer. Check and repair.
3 Only pattern at “a” is broken. *Insert jumper wire J1 and solder. 4 Pattern at “a” and “b” are broken. *Insert the coil RCILF2003YAZZ between “c” and “d”.
NOTE: *At the time of making these repairs, make a visual inspection of the varistor. Check for burned
damage and examine the transformer with a tester for the presence of layer short-circuit (check the primary coil resistance which is approximately 210Ω ± 15%(for R-330AK/AW), 540Ω ± 20%(for R-310AK)). If any abnormal condition is detected, replace the defective parts.
31
RY1
CN - A
VRS1
d
b
(J1)
c
RY2
1
a
1
a
P
T1
d
(J1)
VRS1
2
b
CN - A
c
RY2
RY1
R-330AK/AW R-310AK
O AH SENSOR TEST (For R-330AK / AW)
Checking the initial sensor cooking condition
(1) The oven should be plugged in at least five minutes before sensor cooking. (2) Room temperature should not exceed 95˚F (35˚C). (3) The unit should not be installed in any area where heat and steam are generated. The unit should
not be installed, for example, next to a conventional surface unit. Refer to the “INSTALLATION INSTRUCTIONS” of the operation manual.
(4) Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity. To
permit adequate ventilation, be sure to install so as not to block these vents. There should be some space for air circulation.
(5) 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.
(6) The Sensor works with food at normal storage temperature. For example, chicken pieces would be
at refrigerator temperature and canned soup at room temperature.
(7) Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The
sensor will detect the vapour given of by the spray and turn off before food is properly cooked.
(8) If the sensor has not detected the vapour of the food, ERROR will appear and the oven will shut off.
Water load cooking test
Make sure the oven has been plugged in at least five minutes before checking sensor cook operation. The cabinet should be installed and screws tightened.
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Page 42
R-310AK R-330AK R-330AW
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
(1) Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup. (2) Place the container on the center of tray in the oven cavity. (3) Close the door. (4) Touch REHEAT pad of INSTANT SENSOR once. Now, the oven is in the sensor cooking condition
and “REHEAT” will appear in the display. (5) The oven will operate for the first 16 seconds, without generating microwave energy. NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage of
sensor cooking. (6) After approximately 16 seconds, microwave energy is produced, and the display should start to count
down the remaining cooking time and, oven should turn off after water is boiling (bubbling). If the oven does not turn off, replace the AH sensor or check the control unit, refer to explanation below.
TESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT
To determine if the sensor is defective, the simplest method is to replace it with a new replacement sensor. (1) Disconnect oven from power supply and remove outer case. (2) Discharge the high voltage capacitor. (3) Remove the AH sensor. (4) Install the new AH sensor. (5) Re-install the outer case. (6) Reconnect the oven to the power supply and check the sensor cook operation proceed as follows:
6-1. Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup. 6-2. Place the container on the center of tray in the oven cavity. 6-3. Close the door. 6-4. Touch REHEAT pad once. 6-5. The control panel is in automatic Sensor operation. 6-6. The display will start to count down the remaining cooking time, and the oven will turn off
automatically after the water is boiling (bubbling).
If new sensor dose not operate properly, the problem is with the control unit.
CHECKING CONTROL UNIT
(1) Disconnect oven from power supply and remove outer case. (2) Discharge the high voltage capacitor. (3) Disconnect the wire leads from the cook relay. (4) Disconnect the sensor connector that is mounted to control panel. (5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel. (6) Reconnect the oven to the power supply and check the sensor cook operation proceed as follows:
6-1. Touch REHEAT pad once. 6-2. The control panel is in the sensor cooking operation. 6-3. After approximately 20 seconds, push plunger of select switch for more than 3 seconds. This
condition is same as judgement by AH sensor.
6-4. After approximately 3 seconds, the display shows “ X X . X X “ which is the remaining cooking
time, and the display count down. If the above is not the case, the control unit is probably defective. If the above is proper, the AH sensor is probably defective.
Plunger
NC NO
COM
NO
NC
F-1 F-2
F-3
To connector (F) on Control Unit.
CONNECTOR
R1,R2 : 22Ω ± 1% 1/2W
R3 : 10kΩ ± 5% 1/4W
R4 : 1MΩ ± 5% 1/4W
1 2 3
R1
R2
R3 R4
COM
Sensor Dummy Resistor Circuit
16
Page 43
TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL
R-310AK R-330AK R-330AW
The touch control section consists of the following units as shown in the touch control panel circuit.
(1) Key Unit (2) Control Unit
The principal functions of these units and the signals com­municated among them are explained below.
Key Unit (R-330AK / AW)
The key unit is composed of a matrix, signals generated in the LSI are sent to the key unit through P36, P35, P34, P33, P27, P26, P25 and P24. When a key pad is touched, a signal is completed through the key unit and passed back to the LSI through P20 - P23 to perform the function that was requested.
Key Unit (R-310AK )
The key unit is composed of a matrix, signals generated in the LSI are sent to the key unit through P73, P81, P82, P83, P90 and P91. When a key pad is touched, a signal is completed through the key unit and passed back to the LSI through P60 - P63 to perform the function that was requested.
Control Unit
Control unit consists of LSI, ACL circuit, indicator circuit, power source circuit, relay circuit, buzzer circuit, synchro­nizing signal circuit, absolute humidity sensor circuit and back light circuit.
1) ACL
This circuit generates a signal which resets the LSI to the initial state when power is supplied.
2) Indicator Circuit (R-330AK / AW)
This circuit consists of 25 segments and 4 common electrodes using a Liquid Crystal Display.
Indicator Circuit (R-310AK)
This circuit consists of 12 segments and 3 common electrodes using a Liquid Crystal Display.
3) Power Source Circuit
This circuit generates voltages necessary in the control unit from the AC line voltage. In addition, the synchronizing signal is available in order to compose a basic standard time in the clock circuit.
Symbol Voltage Application
VC -5V LSI(IC1)
4) Relay Circuit
A circuit to drive the magnetron, fan motor, turntable motor and light the oven lamp.
5) Buzzer Circuit
The buzzer is responsive to signals from the LSI to emit audible sounds (key touch sound and completion sound).
6) 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.
7) Door Sensing Switch
A switch to “tell” the LSI if the door is open or closed.
8) Back Light Circuit
A circuit to drive the back light (Light emitting diodes LD1- LD5).
9) Absolute Humidity Sensor Circuit (R-330AK / AW)
This circuit detects moisture of the cooking food to allow its automatic cooking.
17
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R-310AK R-330AK R-330AW
DESCRIPTION OF LSI
LSI(IZA737DR) : R-330AK / AW
The I/O signal of the LSI(IZA737DR) is detailed in the following table.
Pin No. Signal I/O Description
1-4 AN8-AN11 IN Connected to GND.
5 AVSS IN Connected to VC. 6 TEST IN Connected to VC. 7 X2 OUT Terminal not used. 8 X1 IN Connected to GND. 9 VSS IN
10 OCS1 IN
11 OCS2 OUT
12 RESET IN
13 MD0 IN Connected to GND. 14 P20 IN
15 P21 IN
16 P22 IN
17 P23 IN
18 P24 OUT
19 P25 OUT
20 P26 OUT
21 P27 OUT
22 P30 OUT
Power source voltage : -5.1V.
VC voltage of power source circuit input.
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to OCS1 terminal.
Internal clock oscillation frequency control output.
Output to control oscillation input of OCS2.
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily set to “L” level the moment power is applied, at this time the LSI is reset. Thereafter set at “H” level.
Signal coming from touch key.
When either G12 line on key matrix is touched, a corresponding signal out of P24 - P27, P33, P34, P35 and P36 will be input into P20. When no key is touched, the signal is held at “H” level.
Signal similar to P20.
When either G11 line on key matrix is touched, a corresponding signal will be input into P21.
Signal similar to P20.
When either G10 line on key matrix is touched, a corresponding signal will be input into P22.
Signal similar to P20.
When either G9 line on key matrix is touched, a corresponding signal will be input into P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one of G8 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one of G7 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one of G6 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one of G5 line keys on key matrix is touched.
Signal to sound buzzer (2.0KHz).
A: key touch sound. B: Completion sound.
0.1 sec.
A
2 sec.
B
H : GND
L: -5V H : GND
L: -5V
23-24 P31-P32 OUT Terminal not used.
25 P33 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one of G4 line keys on key matrix is touched.
26 P34 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one of G3 line keys on key matrix is touched.
27 P35 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one of G2 line keys on key matrix is touched.
18
Page 45
Pin No. Signal I/O Description
28 P36 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while one
of G1 line keys on key matrix is touched. 29 P37 OUT Terminal not used. 30 VSS IN
Power source voltage : -5V.
VSS voltage of power source circuit input.
31-33 V3-V1 IN
Power source voltage input terminal.
Standard voltage for LCD. 34 VCC IN Connected to GND. 35 COM4 OUT
Common data signal: COM4.
Connected to LCD (Pin No. 1). 36 COM3 OUT
Common data signal: COM3.
Connected to LCD (Pin No. 2). 37 COM2 OUT
Common data signal: COM2.
Connected to LCD (Pin No. 3). 38 COM1 OUT
Common data signal: COM1.
Connected to LCD (Pin No. 4).
39-50
51 SEG13 OUT
SEG1-SEG12
OUT Terminal not used.
Segment data signal.
Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.)
SEG 13 (51)............................. 29 P83 (66)................................... 16
SEG 14 (52)............................. 28 P84 (67)................................... 15
SEG 15 (53)............................. 27 P85 (68)................................... 14
SEG 16 (54)............................. 26 P86 (69)................................... 13
SEG 18 (56)............................. 25 P87 (70)................................... 12
SEG 19 (57)............................. 24 P91 (72)................................... 11
SEG 20 (58)............................. 23 P92 (73)................................... 10
SEG 21 (59)............................. 22 P93 (74)..................................... 9
SEG 22 (60)............................. 21 P94 (75)..................................... 8
SEG 23 (61)............................. 20 P95 (76)..................................... 7
SEG 24 (62)............................. 19 P96 (77)..................................... 6
P81 (64) ...................................18 P97 (78) .....................................5
P82 (65) ...................................17
52-54
SEG 14-SEG16
OUT Segment data signal.
Signal similar to SEG 13. 55 SEG17 OUT Terminal not used.
56-62
SEG 18-SEG24
OUT Segment data signal.
Signal similar to SEG 13. 63 SEG25 OUT Terminal not used.
64-70 P81-P87 OUT
Segment data signal.
Signal similar to SEG 13. 71 P90 OUT Terminal not used.
72-78 P91-P97 OUT
Segment data signal.
Signal similar to SEG 13. 79 VCC IN Connected to GND.
80-82 P10-P12 IN Terminal not used. 83-87 P13-P17 OUT Used for initial balancing of the bridge circuit (absolute humidity sensor).
88 P40 OUT
Oven lamp, fan motor and turntable motor driving signal.
To turn on and off shut off relay (RY1). The square waveform voltage is delivered to the RY1
driving circuit and RY2 control circuit.
16.7 msec H : GND
R-310AK R-330AK R-330AW
19
During cooking
L : -5V
Page 46
R-310AK R-330AK R-330AW
Pin No. Signal I/O Description
89 P41 IN Terminal not used. 90 P42 OUT
91 INT IN
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The signals holds “L” level during microwave cook­ing and “H” level while not cooking. In other cooking modes (variable cooking) the signal turns to “H” level and “L” level in repetition according to the power level.
Signal synchronized with commercial power source frequency.
OFF
P-HI
OFF OFF
P-70
ON
ON
24 sec.
8 sec.
This is basic timing for time processing of LSI.
16.7 msec
92 AVCC IN Connected to GND. 93 AN0 IN Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is an
analog input terminal from the AH sensor circuit, and connected to the A/D converter built into the LSI.
94 AN1 IN
AH sensor input.
This input is an analog input terminal from the AH sensor circuit, and connected to the A/D
converter built into the LSI. 95 AN2 IN Connected to GND. 96 AN3 IN
To input signal which communicates the door open/close information to LSI.
Door closed; “H” level signal (0V).
Door opened; “L” level signal (-5V).
97-100 AN4-AN7 IN
Terminal to change cooking constant 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 cooking constant.
H : GND
L : -5V H : GND
L : -5V
H : GND
L : -5V
LSI(IZA738DR) : R-310AK
The I/O signal of the LSI(IZA738DR) is detailed in the following table.
Pin No. Signal I/O Description
1 SEG 0 OUT
Segment data signal.
Connected to LCD.
12 SEG11 The relation between signals are as follows:
LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.)
SEG 0 (1) ....................................... 4 SEG 6 (7) .................................... 10
SEG 1 (2) ....................................... 5 SEG 7 (8) .................................... 11
SEG 2 (3) ....................................... 6 SEG 8 (9) .................................... 12
SEG 3 (4) ....................................... 7 SEG 9 (10) .................................. 13
SEG 4 (5) ....................................... 8 SEG 10 (11) ................................14
SEG 5 (6) ....................................... 9 SEG 11(12) ................................. 15
13 R60 IN
Signal coming from touch key.
When either G12 line on key matrix is touched, a corresponding signal out of R73, R81-R83 and R90-R91 will be input into R60. When no key is touched, the signal is held at "H" level.
14 R61 IN
Signal similar to R60.
When either G11 line on key matrix is touched, a corresponding signal will be input into R61.
15 R62 IN
Signal similar to R60.
When either G10 line on key matrix is touched, a corresponding signal will be input into R61.
16 R63 IN
Signal similar to R60.
When either G9 line on key matrix is touched, a corresponding signal will be input into R61.
17 AIN0 IN
To input signal which communicates the door open/close information to LSI.
Door close "H" level signal (0V). Door open "L" level (-5V)
18-20
AIN1-AIN3
IN Terminal to change 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.
20
Page 47
Pin No. Signal I/O Description
16.7 msec
During cooking
H : GND
L : -5V
21 VSS IN Power source voltage: -5V
VSS voltage of power source circuit input.
22 R70 OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The signals holds "L" level during microwave cook­ing and "H" level while not cooking. In other cooking modes (variable cooking) the signal turns to "H" level and "L" level in repetition according to the power level.
(ON and OFF times for other power level.)
23 PULSE OUT
Signal to sound buzzer (2.0 kHz).
A: key touch sound. B: Completion sound.
24 R72 OUT Oven lamp, fan motor and turntable motor driving signal
To turn on and off shut off relay (RY1). The square waveform voltage is delivered to the RY1 driving circuit and RY2 control circuit.
25 R73 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one of G8 line keys on key matrix is touched.
26 INT2 IN
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
OFF
P-HI
OFF OFF
P-70
0.1 sec.
A
B
ON
24 sec.
ON
2 sec.
16.7 msec
8 sec.
R-310AK R-330AK R-330AW
H : GND
L : -5V H : GND
L : -5V
H : GND
L: -5V H : GND
L: -5V
H : GND
L : -5V
27 R81 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one of G7 line keys on key matrix is touched.
28 R82 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one of G6 line keys on key matrix is touched.
29 R83 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one of G5 line keys on key matrix is touched.
30 R90 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one of G4 line keys on key matrix is touched.
31 R91 OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one
of G3 line keys on key matrix is touched. 32 R92 OUT Terminal not used. 33 XIN IN
Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the capacitor and resistor circuit with respect
to XOUT terminal. 34 XOUT OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN. 35 RESET IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied. Temporarily set "L"
level the moment power is supplied, at this time the LSI is reset. Thereafter set at "H" level. 36 HOLD IN/OUT Connected to GND. 37 VLC IN
Signal synchronized with commercial power source frequency.
Signal similar to VSS. 38 COM1 OUT
Common data signal: COM1.
Connected to LCD (Pin No. 1) 39 COM2 OUT
Common data signal: COM2.
Connected to LCD (Pin No. 2)
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R-310AK R-330AK R-330AW
Pin No. Signal I/O Description
40 COM3 OUT Common data signal: COM1.
Connected to LCD (Pin No. 3) 41 COM4 OUT Terminal not used. 42 VDD IN
Power source voltage input terminal.
Connected to GND.
ABSOLUTE HUMIDITY SENSOR CIRCUIT (R-330AK / AW)
(1)Structure of Absolute Humidity Sensor
The absolute humidity sensor includes two thermistors as shown in the illustration. One thermistor is housed in the closed vessel filled with dry air while another in the open vessel. Each sensor is provided with the protective cover made of metal mesh to be protected from the external airflow.
Sensing part (Open vessel)
Sensing part (Closed vessel)
(2)Operational Principle of Absolute Humidity Sensor
The figure below shows the basic structure of an absolute humidity sensor. A bridge circuit is formed by two thermistors and two resistors (R1 and R2). The output of the bridge circuit is to be amplified by the operational amplifier. Each thermistor is supplied with a current to keep it heated at about 150˚C (302˚F), the resultant heat is dissipated in the air and if the two thermistors are placed in different humidity conditions they show different degrees of heat conductivity leading to a potential difference between them causing an output voltage from the bridge circuit, the intensity of which is increased as the absolute humidity of the air increases. Since the output is very minute, it is amplified by the operational amplifier.
Absolute humidity vs,
R1
R2
Operational amplifier
+
­S : Thermistor
open vessel
C : Thermistor closed vessel
Output voltage
Output voltage
C
S
R3
output voltage characterist
Absolute humidity (g/m )
2
(3)Detector Circuit of Absolute Humidity Sensor Circuit
This detector circuit is used to detect the output voltage of the absolute humidity circuit to allow the LSI to control sensor cooking of the unit. When the unit is set in the sensor cooking mode, 16 seconds clearing cycle occurs
than the detector circuit starts to function and the LSI observes the initial voltage available at its AN1 terminal. With this voltage given, the switches SW1 to SW5 in the LSI are turned on in such a way as to change the resistance values in parallel with R3 ~ R7 of IC2. Changing the resistance values results in that there is the same potential at both F-3 terminal of the absolute humidity sensor and AN0 terminal of the LSI. The voltage of AN1 terminal will indicate about -2.5V. This initial balancing is set up about 16 seconds after the unit is put in the Sensor Cooking mode. As the sensor cooking proceeds, the food is heated to generate moisture by which the resistance balance of the bridge circuit is deviated to increase the voltage available at AN1 terminal of the LSI. Then the LSI observes that voltage at AN1 terminal and compares it with its initial value, and when the comparison rate reaches the preset value (fixed for each menu to be cooked), the LSI causes the unit to stop sensor cooking; thereafter, the unit goes in the next operation automatically. When the LSI starts to detect the initial voltage at AN1 terminal 16 seconds after the unit has been put in the Sensor Cooking mode, if it is not possible to balance, of the bridge circuit due to disconnection of the absolute humidity sensor, ERROR will appear on the display and the cooking is stopped.
1) Absolute humidity sensor circuit
C. Thermistor in closed vesssl S. Thermistor in open vessel
F-1
C
F-3
3.57k
S
F-2
VA : -15V
11
3.32k
10
R50
IC2(IZA495DR)
R3 R4 R5 R6
R7
R8
47k
+
0.1
uF
-
1.8k
0
VA : -15V
620k
300k 150k 75k
37.4k
360k
12
0.01uF
0.015uF
10k
VC : -5V
4 5 6 7 8
3
0.01uF
2
47k
1
SW1
9
P97
SW2
8
P96
SW3
7
P95
SW4
6
P94
SW5
5
P93
11
AN0
LSI (IC1)
12
AN1
22
Page 49
SERVICING
R-310AK R-330AK R-330AW
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 all 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.
approx. 1M ohm
2. Shapes of Electronic Components
Transistor 2SA933S
C
B
DTA123ES DTA143ES KRA101M KRC243M
Transistor 2SB1238
B
C
E
E
3. 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 MICROWAVE OVEN IS STILL LIVE DURING SERVICING PRESENTS A HAZARD. Therefore, when checking the performance of the touch control panel, put the outer cabinet on the oven to avoid touching the high voltage transformer, or unplug the primary terminal (connector) of the high voltage transformer to turn it off; the end of such connector must be insulated with an insulating tape. After servicing, be sure to replace the leads to their original locations.
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 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 sensor­related controls of the touch control panel by using the dummy resistor(s).
4. Servicing Tools
Tools required to service the touch control panel assembly.
1) Soldering iron: 30W (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
5. 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 connectors 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.
23
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R-310AK R-330AK R-330AW
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
CAUTION: DISCONNECT OVEN FROM POWER SUPPLY BEFORE REMOVING OUTER CASE.
DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING AFTER REMOVING OUTER CASE.
OUTER CASE REMOVAL
To remove the components, procedure as follows.
1. Disconnect oven from power supply.
2. Remove four(4) screws from rear and one (1) screws along the right side of case.
3. Slide the entire case back out about 1 inch(3 cm) to free
POWER TRANSFORMER REMOVAL
it from retaining clips on the cavity face plate.
4. Lift entire case from the unit. CAUTION: DISCONNECT OVEN FROM POWER SUP-
PLY BEFORE REMOVING OUTER CASE.
1. Disconnect oven from power supply and remove outer case.
2. Discharge high voltage capacitor.
3. Disconnect wire leads from power transformer, magnetron and capacitor terminals.
4. Remove four (4) screws holding transformer to bottom plate right.
5. Remove transformer from bottom plate right.
6. Remove the one (1) terminal insulator and tube from filament lead (longer one) of power transformer.
Re-install
1. Install the terminal insulator to receptacle of filament
TERMINAL INSULATOR REPLACEMENT
1. Open covers of the terminal insulator by using small flat type screw driver.
2. Remove the receptacle from the terminal insulator.
3. Now, the terminal insulator is free.
Terminal  insulator
Flat type screw driver
lead (longer one) of power transformer.
2. Rest transformer on the bottom plate right with its primary terminals toward the oven face plate.
3. Secure transformer with four screws to bottom plate right.
4. Re-connect wire leads (primary and high voltage) to power transformer and filament leads of transformer to magnetron and high voltage capacitor. Refer to "PICTORIAL DIAGRAM" on page 29 or 30.
5. Re-install outer case and check that oven is operating properly.
Installation
1. Insert the receptacle into terminal insulator.
2. Close covers of the terminal insulator, as shown below.
COVERS
RECEPTACLE
MAGNETRON REMOVAL
Removal
1. Disconnect oven from power supply and remove outer case.
2. Discharge high voltage capacitor.
3. Disconnect wire leads from magnetron.
4. Remove the one (1) screw holding chassis support to magnetron.
5. Remove the chassis support from oven.
6. Remove the one (1) screw holding the magnetron air guide to the magnetron.
7. Carefully remove the two (2) screws holding magnetron to waveguide flange.
8. Lift up magnetron with care so that magnetron antenna is not hit by any metal object around antenna.
9. Now, the magnetron is free.
Re-install
1. Re-install the magnetron to waveguide flange with the two (2) screws diagonally as shown in Figure C-1.
2. Re-install the magnetron air guide to magnetron with the one (1) screw.
3. Insert the two (2) tabs of the chassis support to the oven
cavity front plate and the back plate.
4. Re-install the chassis support to magnetron with the one (1) screw.
5. Reconnect the wire leads to the magnetron. Refer to "PICTORIAL DIAGRAM" on page 29 or 30.
6. Re-install outer case and check that the oven is operating properly.
CAUTION: WHEN REPLACING MAGNETRON, BE SURE
THE R.F. GASKET IS IN PLACE AND MOUNT­ING SCREWS ARE TIGHTENED SECURELY
SCREWS
MAGNETRON
WAVEGUIDE FLANGE
Figure C-1. Magnetron replacement
24
Page 51
HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR REMOVAL
R-310AK R-330AK R-330AW
1. Disconnect oven from power supply and remove outer case.
2. Discharge high voltage capacitor.
3. Disconnect the high voltage wire B from the high voltage capacitor.
4. Disconnec t he high voltage wire of high voltage rectifier assembly from the magnetron.
5. Remove one (1) screw holding capacitor holder to oven cavity rear plate.
6. Disconnect rectifier terminal from capacitor.
OVEN LAMP AND LAMP SOCKET REMOVAL
1. Disconnect oven from power supply and remove outer case.
2. Discharge high voltage capacitor.
3. Bend the tab of the partition angle holding the lamp socket.
4. Lift up the oven lamp socket.
5. Pull the wire leads from the oven lamp socket by pushing the terminal hole of the oven lamp socket with the small flat type screw driver.
6. Now, the oven lamp socket is free.
POSITIVE LOCK® CONNECTOR (NO-CASE TYPE) REMOVAL
Push the lever of positive lock® connector. Pull down on the positive lock® connector.
CAUTION: WHEN YOU CONNECTING THE POSITIVE
LOCK® CONNECTORS TO THE TERMINALS, INSTALL THE POSITIVE LOCK® SO THAT THE LEVER FACES YOU
High voltage rectifier assembly is now free.
7. Remove one (1) screw holding high voltage rectifier assembly to capacitor holder.
8. Remove capacitor holder. Capacitor is now free.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTI-
FIER AND HIGH VOLTAGE CAPACITOR, GROUND SIDE TERMINAL OF THE HIGH VOLTAGE RECTIFIER MUST BE SECURED FIRMLY WITH A GROUNDING SCREW.
Oven lamp socket
Terminal
Wire lead
Terminal hole
Flate type small screw driver
Figure C-2. Oven lamp socket
Terminal
Positive lock® connector
Lever
1
Push
CONTROL PANEL ASSEMBLY REMOVAL
1. Disconnect oven from power supply and remove outer case.
2. Discharge high voltage capacitor.
3. Disconnect wire leads from the door sensing switch and the oven cavity front flange.
4. Disconnect the wire leads from panel components.
5. Make one (1) tab of the oven cavity front plate straight holding the control panel assembly to the oven flange.
6. Slide the control panel assembly upward and remove it.
7. Now, individual components can be removed.
TURNTABLE MOTOR REMOVAL
1. Disconnect oven from power supply.
2. Remove turntable and turntable support from oven cavity.
3. Lay the oven on it's backside. Remove the turntable motor cover by snipping off the material in four corner.
4. Where the corners have been snipped off bend corner areas flat. No sharp edge must be evident after removal of the turntable motor cover.
2
Pull down
Figure C-3. Positive lock® connector
NOTE: 1. Before attaching a new key unit, wipe off remaining
adhesive on the control panel frame surfaces completely with a soft cloth soaked in alcohol.
2. When attaching the key unit to the control panel frame, adjust the upper edge and right edge of the key unit to the correct position of control panel frame.
3. Stick the key unit firmly to the control panel frame by rubbing with soft cloth not to scratch.
5. Disconnect wire leads from turntable motor. (See "Positive lock connector removal")
6. Remove two (2) screws holding turntable motor to oven cavity.
7. Now the turntable motor is free.
8. After replacement use the one (1) screw to fit the turntable motor cover.
25
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R-310AK R-330AK R-330AW
COOLING FAN MOTOR REMOVAL
1. Disconnect oven from power supply and remove outer case.
2. Discharge high voltage capacitor.
3. Disconnect the wire leads from the fan motor.
4. Remove one (1) screw holding the chassis support to magnetron. And remove chassis support.
5. Release the snap of the main wire harness from the fan duct.
6. Remove one (1) screw holding the fan duct assembly to oven cavity.
7. Release the main wire harness from the hole of the fan duct.
8. Release the fan duct from the waveguide flange.
9. Release the fan duct assembly from the oven cavity.
10.Remove the fan blade from the fan motor shaft according the following procedure.
1) Hold the edge of the rotor of the fan motor by using a pair of grove joint pliers.
CAUTION: * Make sure that any pieces do not enter the gap
between the rotor and the stator of the fan motor because the rotor is easily shaven by pliers and metal pieces may be produced.
* Do not touch the pliers to the coil of the fan motor
because the coil may be cut or injured.
* Do not disfigure the bracket by touching with the
pliers.
2) Remove the fan blade from the shaft of the fan motor by pulling and rotating the fan blade with your hand.
3) Now, the fan blade will be free.
CAUTION: * Do not reuse the removed fan blade because the
hole (for shaft) may be larger than normal.
Coil
11.Remove the two (2) screws holding the fan motor to the fan duct.
12.Now, the fan motor is free.
INSTALLATION
1. Install the fan motor to the fan duct with the two (2) screws.
2. Install the fan blade to the fan motor shaft according the following procedure.
1) Hold the center of the bracket which supports the shaft of the fan motor on the flat table.
2) Apply the screw lock tight into the hole (for shaft) of the fan blade.
3) 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 strongly when installed
because the bracket may be disfigured.
* Make sure that the fan blade rotates smooth after
installation.
* Make sure that the axis of the shaft is not slanted.
3. Catch three holes of fan duct on three tabs of the waveguide flange.
4. Install the fan duct assembly to the oven cavity with the one (1) screw.
5. Insert the snap of the main wire harness to the hole of the fan duct and insert the main wire harness into the hole of the fan duct.
6. Install one (1) tab of the chassis support to oven cavity front plate and install another tab of it to rear plate. And then screw chassis support to magnetron with one (1) screw.
7. Connect the wire leads to the fan motor, referring to the pictorial diagram.
Stator
Gap Bracket
Rotor
Groove joint pliers
Axis
Shaft
Stator
Rotor
These are the position where should be pinched with pliers
Table
Shaft
Center of bracket
Side ViewRear View
DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL
1. Disconnect oven from power supply and remove outer case.
2. Discharge high voltage capacitor.
3. Disconnect wire leads from the switches.
4. Remove two (2) screws holding latch hook to oven flange.
5. Remove latch hook assembly from oven flange.
6. Push outward on the two (2) retaining tabs holding switch in place.
7. Switch is now free. At this time switch lever will be free, do not lose it.
Re-install
1. Re-install each switch in its place. The secondary interlock/monitor switches are in the lower position and the door sensing switch is in the upper position.
2. Re-connect wire leads to each switch. Refer to pictorial diagram.
3. Secure latch hook (with two (2) mounting screws) to oven flange.
4. Make sure that the monitor switch is operating properly and check continuity of the monitor circuit. Refer to chapter "Test Procedure" and Adjustment procedure.
26
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R-310AK R-330AK R-330AW
DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT
If the door sensing switch, secondary interlock switch and monitor switch do not operate properly due to a misadjustment, the following adjustment should be made.
1. Loosen the two (2) screws holding latch hook to the oven cavity front flange.
2. With door closed, adjust latch hook by moving it back and forth, and up and down. In and out play of the door allowed by the upper and lower position of the latch hook should be less than 0.5mm. The vertical position of the latch hook should be adjusted so that the door sensing switch and secondary interlock switch are activated with the door closed. The horizontal position of the latch hook should be adjusted so that the plunger of the monitor switch is pressed with the door closed.
3. Secure the screws with washers firmly.
4. Check the operation of all switches. If each switch has not activated with the door closed, loosen screw and adjust the latch hook position.
After adjustment, check the following.
1. In and out play of door remains less than 0.5mm when in the latched position. First check upper position of latch hook, pushing and pulling upper portion of door toward the oven face. Then check lower portion of the latch hook, pushing and pulling lower portion of the door
toward the oven face. Both results (play in the door) should be less than 0.5mm.
2. The door sensing switch and secondary interlock switch interrupt the circuit before the door can be opened.
3. Monitor switch contacts close when door is opened.
4. Re-install outer case and check for microwave leakage around door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.)
Door
Latch Hook 
Latch Heads
Switch Lever
Door Sensing  Switch
Monitor Switch
Secondary Interlock Switch
Figure C-4. Latch Switch Adjustments
OUTER CASE SWITCHES REPLACEMENT (for the ovens from October 1996 production)
Removal
1. Disconnect the oven from the power supply and remove the outer case.
2. Discharge high voltage capacitor.
3. Remove the one (1) screw holding the switch holder to the oven cavity rear plate.
4. Release the two (2) tabs of the switch holder from the two (2) holes of the oven cavity plate.
5. Release the one (1) snap of the main wire harness from the hole of the switch holder.
6. Disconnect the wire leads from the outer case switches.
7. Remove the switch holder (outer case switch assembly) from the oven cavity rear plate.
8. Push on the one (1) retaining tab holding the outer case switch.
9. Turn the outer case switch clockwise around the pole.
10.Now, the outer case switch is free.
NOTE: Do not lose the actuator because it will be free after
the outer case switches are removed.
Re-install
1. Re-install the actuator to the switch holder by inserting the tab of the actuator into the square hole on the switch holder, as shown in Figure C-5.
2. Re-install the outer case switches to the switch holder, as shown in Figure C-5.
3. Re-connect the wire leads to the outer case switches, referring to the Pictorial diagram.
4. Re-install the one (1) snap of the main wire harness to the hole of the switch holder.
5. Catch the two (2) tabs of the switch holder to the two (2) holes of the oven cavity rear plate.
6. Re-connect the switch holder (outer case switch assembly) to the oven cavity rear plate with the one (1) screw.
7. Re-install the outer case cabinet and check that the oven is operating properly.
Outer case switch
Pole
Tab
Actuater
Switch holder
Outer case switch
Figure C-5. Outer case switches replacement
DOOR REPLACEMENT
REMOVAL
1. Disconnect oven from power supply.
2. Push the open button and open the door slightly.
3. Insert an putty knife (thickness of about 0.5mm) into the gap between the door stopper and the choke cover to free engaging parts as shown in Figure C-6
4. Try the principles of the lever and lift up the door stopper.
5. Now, the door stopper is free from the door assembly.
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-6 to free engaging parts.
7. Try the principles of the lever and lift up the choke cover
27
Page 54
R-310AK R-330AK R-330AW
by inserting a putty knife as shown Figure C-6.
8. Release choke cover from door panel.
9. Now choke cover is free.
Door stopper
1
Choke Cover
11
12
10
9
8
13
7
6
2
3
4
5
Door Frame
Putty Knife
Measurement Procedure.)
Note: The door on a microwave oven is designed to act as
an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle. This function does not require that door be air­tight, moisture (condensation)-tight or light-tight. 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-6. Door Disassembly
10.Release two (2) pins of door panel from two (2) holes of upper and lower oven hinges by lifting up.
11.Now, door panel with door frame is free from oven cavity.
12.Release door panel from nine (9) tabs of door frame by sliding door panel downward.
13.Now, door panel with sealer film is free.
14.Tear sealer film from door panel.
15.Now, door panel is free.
16.Slide latch head upward and remove it from door frame with releasing latch spring from door frame and latch head.
17.Now, latch head and latch spring are free.
18.Remove door screen from door frame by releasing two (2) tabs.
19.Now, door screen is free.
RE-INSTALL
1. Re-install door screen to door frame by fitting two (2) tabs of door frame to two (2) holes of door screen.
2. 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.
3. Re-install door panel to door frame by fitting nine (9) tabs of door frame to nine (9) holes of door panel.
4. Hold the door panel to the door frame by sliding the door panel upward.
5. Put sealer film on door panel. Refer to "Sealer Film" about how to handle new one.
6. Re-install choke cover to door panel by pushing.
7. Catch two (2) pins of door panel on two (2) hole of upper and lower oven hinges.
8. Re-install the door stopper to the door assembly.
Note: After any service to the door; (A) Make sure that door sensing switch and secondary
interlock switch are operating properly. (Refer to chapter "Test Procedures".).
(B) An approved microwave survey meter should be
used to assure compliance with proper microwave radiation emission limitation standards.
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 center 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
Pin
Upper oven hinge
Door panel
Lower oven hinge
Pin
Lower  oven hinge
Door stopper
Choke cover
Figure C-7. Door Replacement
SEALER FILM
Installation
1. Put the adhesive tape on the backing film of the sealer film as shown in Fig. C-8.
2. Tear the backing film by pulling the adhesive tape.
3. Put the pasted side of the sealer film on the door panel
Sealer film
Backing film
Adhesive tape
Figure C-8. Sealer film
28
Page 55
R-310AK R-330AK R-330AW
1
A
B
BLKBLK
OVEN
THERMAL CUT-OUT
C
2
GRN
N
H
BLK
NOTE:
The grounding conductor of
the power supply cord has
been grounded by power
supply cord fixing screw.
The screw must allways be
kept tight.
WHT
3
POWER SUPPLY CORD
120V 60Hz
WHT
NOTE:
The neutral (WHT) wire must be
connected to the terminal with "N"
mark on the power supply cord.
45
RECTIFIER H.V.
HIGH VOLTAGE
CAPACITOR
MAGNETRON
HIGH VOLTAGE COMPONENTS
RED
GRY
GRY
POWER 
TRANSFORMER
6
A
B
C
WHT
OVEN LAMP 
AND SOCKET
D
E
F
N.O.
DOOR
SENSING
G
ORG
BLUE MARK
NOTE:
Hot (ORG) wire must be
connected to the terminal
with blue mark on the
oven light socket.
GRY
GRN
COM.
SWITCH
BLK
GRY
BLK
GRN
CN-A
BLK 1
D
BLK
BLK
GRY
GRY
BLK
ORG
WHT
E
BLK
&
FUSE
HOLDER
FAN MOTOR
BLK
GRY
RED
N.C.
COM.
TURNTABLE
MOTOR
WHT
NO
MONITOR
SWITCH
SECONDARY
GRY
WHT
COM.
INTERLOCK
SWITCH
F
WHT
Figure S-1(a). Pictorial Diagram for the ovens until September 1996 production
G
BLK
RED
2
3 WHT
RY2 (COM)
RED
RY2 (N.O.)
AH SENSOR ( for R-330AK/AW only)
H
BLK
RED
WHT
CN-F
123
1
LSI
R-330AK/AW
CONTROL UNIT
CN-G
2
AB
123
CN-F
N.O.
COM.
CN-A
3
RY1
1
3
29
RY2
PRIMARY
INTERLOCK 
RELAY
COM.
PRIMARY
INTERLOCK 
RELAY
N.O.
RY2
RY1
1 3
CN-A
R-310AK
A
B
LSI
CONTROL UNIT
CN-G
45
H
6
Page 56
R-310AK R-330AK R-330AW
1
A
BLKBLK
B
OVEN
THERMAL CUT-OUT
C
2
GRN
N
H
BLK
NOTE:
The grounding conductor of
the power supply cord has
been grounded by power
supply cord fixing screw.
The screw must allways be
kept tight.
BLK
OUTER CASE 
SWITCH (Upper)
N.O.
BLK
WHT
COM.
WHT
3
NOTE:
The neutral (WHT) wire must be
connected to the terminal with "N"
mark on the power supply cord.
POWER SUPPLY 
CORD 120V 60Hz
N.O.
COM.
OUTER CASE 
SWITCH (Lower)
WHT
WHT
45
RECTIFIER H.V.
HIGH VOLTAGE
CAPACITOR
MAGNETRON
POWER 
HIGH VOLTAGE COMPONENTS
RED
GRY
GRY
6
A
B
TRANSFORMER
C
D
OVEN LAMP 
AND SOCKET
E
F
DOOR
G
ORG
WHT
BLUE MARK
Hot (ORG) wire must be
connected to the terminal
with blue mark on the
oven light socket.
NOTE:
GRY
GRN
N.O.
COM.
SENSING
SWITCH
BLK
GRY
BLK
GRN
CN-A
BLK 1
D
BLK
BLK
GRY
GRY
BLK
ORG
WHT
FAN MOTOR
TURNTABLE
MOTOR
BLK
2
3 WHT
&
FUSE
HOLDER
BLK
RY2 (COM)
BLK
RED
RY2 (N.O.)
RED
RED
GRY
N.C.
COM.
WHT
NO
MONITOR
SWITCH
SECONDARY
GRY
WHT
COM.
INTERLOCK
SWITCH
WHT
E
F
Figure S-1(b). Pictorial Diagram for the ovens from October 1996 production
G
AH SENSOR ( for R-330AK/AW only)
H
CN-F
BLK
RED
123
WHT
1
LSI
R-330AK/AW
CONTROL UNIT
CN-G
2
AB
123
CN-F
CN-A
1
3
3
COM.
RY1
N.O.
30
RY2
COM.
PRIMARY
INTERLOCK 
RELAY
N.O.
RY2
A
B
LSI
R-310AK
PRIMARY
INTERLOCK 
RELAY
CONTROL UNIT
CN-G
45
RY1
1 3
CN-A
H
6
Page 57
R-310AK R-330AK R-330AW
1
A
B
LIQUID CRYSTAL DISPLAY
LD1
LD2
LD3
2
C
Q2
2SB1238
R6 27
D
2SA933 Q1
CONTROL UNIT
R2 1k
+
E
+
F
ON DEF. LBS. QTY. CHECK
LD4
LD5
D3 D4
C5 0.1µ/50v
–
–
1
VR
R7 4.7k
C4 47µ/16v
C3 0.01µ/16v
C2 470µ/25v
C1 0.1µ/50v
2
R3 15k
VC
HZ4C3 ZD1
D2
C6 0.01µ/16v
15k R5
3.3k R30
R1 910 1w
SP30
R4 15k
3
R71 10kF
VDD
42
1
SEG 0
(J6) (J4) (J2)
0.01µ/16v C70
COM 4
40
SEG 1
SEG 2
COM 3
COM 2
SEG 3
VLC
COM 1
SEG 4
SEG 5
HOLD
SEG 6
RESET 35
SEG 7
33pF C71
X IN
X OUT
10515
SEG 8
SEG 9
(J7) (J5) (J3)
R92
R91
SEG10
SEG11
R90
R83
30
R60
R61
R20 15k
– +
C20 0.1µ/50v
Q30
KRA101M
Q20
KRA101M
+
45
R82
R81
R73
R72
R70
INT2
PLUSE
22
25
IC1 IZA738DR
21
R62
R63
VSS
AIN0
AIN1
AIN2
AIN3
0.01µ/16v C40
4.7k R41
R40 15k
–
C21
10µ/35v
Q22
DTA143ES
15k R51
15k R52
15k R53
15k R54
15k R55
15k R56
C61~C64
330pF/50v x 4
G 1
G 8 G 7 G 6 G 5 G 4 G 3 G 2
C61 C62 C63 C64
R61 220k R62 220k R63 220k
R64 220k
PLATE
POPCORN
DINNER
6
1
2
43
5
G 9
8
09 7
G10
R57 15k
BEVERAGE
REHEAT
CASSEROLE
FRESH
VEGETABLE
COMPU
DEFROST
START
MINUTE
G11
R58 15k
STOP
BAKED
ROLL
FRESH
ROLL
FROZEN
TIMER
PLUS
POWER
R59 15k
CLEAR
POTATO
/ MUFFIN
/ MUFFIN
CLOCK
LEVEL
G12
R60 15k
6
A
B
KEY UNIT
C
D
E
Figure S-2(a). Control Panel Circuit for R-310AK
F
3
T1 D1:S1NB10
1
G
A3
H
1
VRS1
4
VR
2
d
(J1)
b
a
AC120V
60Hz
2
Q21
KRC243M
R22
D21D22
RY1
RY2
c
56
IF NOT SPECIFIED, 1/4w ± 5%
D20
D40
IF NOT SPECIFIED, 1SS270A
G
NOTE :
B
A1
NO
COM
A
H
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
3
MICRO
DOOR
SWITCH
45
6
31
Page 58
R-310AK R-330AK R-330AW
1
29
A
LBS KG DEF HELP
LIQUID CRYSTAL DISPLAY
B
C
COOK SENSOR
1
2
50
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG12
SEG11
SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24
SEG25 P81 P82 P83 P84 P85 P86 P87 P90 P91 P92 P93 P94 P95 P96 P97
VCC
P10
SEG10
5560657075
P11
P12
P13
P14
81
5180
SEG3
45
85
90
P15
P16
P17
P40
P41
P42
3
45
10k 10k 10k
R5
R6 R7
C6 0.1µ/50v
31
V1V2V3
40
INT
SEG1
COM1
AN0
AVCC
COM2
COM3
95
AN1
AN2
VCC
COM4 35
AN3
AN4
510152025
AN5
AN6
AN7
100
X1 X2
VSS P37 P36 P35 P34 P33 P32 P31 P30 P27 P26 P25 P24 P23 P22 P21 P20 MD0
VSS
AN9 AN8
30
RESET
OSC2 OSC1
TEST
AVSS AN11 AN10
1
R80 1M
SEG2
IC1 IZA737DR
R68 15k
CF1 4M
R69 15k
R70 15k
R71 15k
R72 100k
R73 100k
R74 100k
R67 15k
R66 15k
R65 15k
R64 15k
G 4 G 3 G 2 G 1
R63 15k
R62 15k
R61 15k
G 7 G 6 G 5
R60 15k
G 8
R75 100k
HELP
CUSTOM
POPCORN
REHEAT
54321
330pF C60
POWER
BAKED
POTATO
DINNER
FROZEN
09876
330pF C61
STOP
LEVEL
FRESH VEG
FRESH VEG
GROUND
FROZEN
MINUTE
KITCHEN
330pF C62
CLEAR
HARD
SOFT
SOUP
MEAT
VEG
PLUS
TIMER
FISH
SEA FOOD
COOK
COMPU
COMPU
DEFROST
HOT
DOG
CLOCK RICE
START
TOUCH ON
G12 G11 G10 G 9
330pF C63
6
A
B
KEY UNIT
C
D
Q2
DTA123ES
–
+
+
–
E
HZ16-1
ZD1
CONTROL UNIT
–
+
F
D1:SINB10
3
T1
2
G
P
VRS1
ZD3 HZ4A2
C5 47µ/16v ZD2 HZ5C2
C4 10µ/35v
C3 0.1µ/50v
Q1
R1 2.4k
C2 1000µ/35v
C1 0.1µ/50v
4
1
d
10G471K
b
a
R4 4.7k
1/2w
R3 510
VA
R2 680
2SB1238
1/2w
0.1µ/50v C7
(J1)
C9
4.7kR8
C30 C8
2
87654
3
R40 3.3k
47k
SP40
+
Q40 KRA101M
C20 0.1µ/50v
–
47k
37.4kD
75kF
150kF 300kF 620kF
R30 4.7k
Q3
KRA101M
Q20 KRA101M
Q21
KRC243M
D20D21
RY1
 R31 15k
D30
c
0.015µ
D22
(J9) (J7) (J5)
10k
–
+
1.8kF
0.1µ
50v
3.57kD
Q22
DTA143ES
RY2
3.32kD
(J8) (J6)
(J4) (J2) (J3)
D51D50
360kF
R50
11 10 12 9
VA
IC2 (IZA495DR)
15k
330 1w
R90
R52 27
F-1 F-2 F-3
1
2
Q50 2SB1238
LD1 LD2 LD3 LD4 LD5
AH SENSOR
IF NOT SPECIFIED, 1SS270A
IF NOT SPECIFIED, 0.01µF / 16v
D
E
F
Figure S-2(b). Control Panel Circuit for R-330AK/AW
G
A 3
H
1
AC 120V
60Hz
2
A 1
TURNTABLE
MOTOR
OVEN LAMP
FAN MOTOR
A
3
32
B
NO
COM
MICRO
NOTE : IF NOT SPECIFIED, 1/4w ± 5%
45
H
6
Page 59
R-310AK R-330AK R-330AW
1
A
B
C
D
E
2
0
DIP
1
CN - G
12
R52 R53
R54
R61
C61 R62 C62 R63
C63
R41
R55
R56
(J5) (J3)
10
(J6)
LD1
(J7)
3
LD2
3
121
R50
R51
R60
IC1
R59 R58 R57
R64 C64
R40 C40
15
(J2)
(J4)
C3
R5
R4
LD3 LD4
F
1
2
4
5
7
16
EE
Q21
C21
45
WH - A
LD5
1
2
WH - A
1
2
B
42
C70
R71
D4 D3
B
Q1
6
R7
R6
E
R2
C5
ZD1
R3
R30
8
C4
R1
(CF1)
Q2
E
SP30
B
C71
D2
C6
22
9
R22
B
B
Q22
GREEN
B
12
Q30
E
R20
E
11
D22
13
CN - B DOOR SW
C20
12
BE
A
6
A
B
C
D
E
F
G
H
1
14
D1
1
4
2
C1
(J1)
C2
T1
VRS1
D20 D40
31
CN - A
AC OL TTM FM
RY1
Figure S-3(a). Printed Wiring Board for R-310AK
2
3
45
33
Q20
F
COM(AC)
HVT
RY2
G
D21
H
6
Page 60
R-310AK R-330AK R-330AW
1
A
B
C
D
E
F
2
3
(WH-A)
21
LD5
LOT.NO.
(R66)
1
R67
F
50
C63 C62 C61
C60 R72 R73 R74
R75
9
R40
B
VH
CN - A
R65
B
Q22
17
R64 R63 R62
R61
R60
XH
R6
R7
R5
31
30
IC1
R80
18
R71 R70
R69
R68
Q40
E
SP40
B
Q21
C20
B
E
Q20
E C21
(J1)
CN - G
12
QKITPB021MRE0
31
LD4 LD3
BFB
51
100
1
CF1
C6
6
ZD3
(C10)
C8
R4
E
B
Q2
10
14
E
B
15
ZD1
VRS1
LD2 LD1
SATL
80
81
3
4
C30 (J7) (J6) (J5) (J3)
(J9)
C5
ZD2
R3
R2
E
Q1
R1
C2
1
P
45
C4
WH-A
21
SMCA
BE
(R51)
Q50
D50
R52
B
1
E
(Q51)
1
G
REEN
SH - B
2
IC2
R90
2
1
5
13 C3
C1
12
B
C9
Q3
1
C7
E
3
R8
(J4) (J2) (J8)
19
R31
12
7
8
11
R50
D30
D22
CN - F
20
R30
(J10)
(J11)
WH-A
21
DIP
D51
CN - B
SH - A
16
D3
D4
D1
D2
S
6
A
B
C
D
E
F
G
H
1
RY1
RY2
T1
D20 DU24D1
D21
(OM1F)
Figure S-3(a). Printed Wiring Board for R-330AK/AW
2
3
45
34
G
H
6
Page 61
R-310AK R-330AK R-330AW
PARTS LIST FOR R-310AK
REF. NO. PART NO. DESCRIPTION Q'TY CODE
ELECTRIC PARTS
1- 1 QSW-MA110WRE0 1- 2 QFSHDA009WRE0 Fuse holder 1 AH 1- 3 FFS-BA012WRK0 Monitor fuse and monitor switch assembly 1 AH 1- 4 RTHM-A078WRE0 Thermal cut-out 125 deg. 1 AL 1- 5 FACCDA048WRE0 Power supply cord 1 AW 1- 6 FH-DZA075WRK0 High voltage rectifier assembly 1 AS 1- 7 RC-QZA173WRE0 High voltage capacitor 1 AX 1- 8 RV-MZA197WRE0 Magnetron 1 BN 1- 9 RMOTEA338WRE0 Fan motor 1 AV 1-10 QSOCLA021WRE0 Oven lamp socket 1 AH 1-11 RLMPTA030WRE0 Oven lamp 1 AF 1-12 RMOTDA161WRE0 Turntable motor 1 AU 1-13 RTHM-A079WRE0 Thermal cut-out 95 deg. 1 AL 1-14 RTRN-A508WRE0 Power transformer (until September 1996 production) 1 BM 1-14 RTRN-A512WRE0 Power transformer (from October 1996 production) 1 BM
2- 1 GCABUA582WRT0 Outer case cabinet 1 AZ 2- 2 GDAI-A261WRW0 Bottom plate left 1 AP 2- 3 GDAI-A286WRW0 Bottom plate right 1 AN 2- 4 GLEGPA006WRE0 Foot 2 AB 2- 5 GLEGPA067WRE0 Leg 1 AE
3- 1 CPWBFA709WRK0 Control unit 1 BL 3- 1A QCNCMA394DRE0 2-pin connector (CN-A) 1 AD 3- 1B QCNCWA057DRE0 12-pin connector (CN-G) 1 AF 3- 1C FW-VZA195DRE0 Switch harness A (SN-A) 1 AD 3- 1D FW-VZA197DRE0 Switch harness B (SN-B) 1 AD 3- 1E FW-VZA196DRE0 Lead wire harness (WH-A) 1 AD C1 RC-KZA087DRE0 Capacitor 0.1uF 50V 1 AB C2 VCEAB31EW477M Capacitor 470uF 25V 1 AC C3 VCKYD11CY103N Capacitor 0.01uF 16V 1 AH C4 VCEAB31CW476M Capacitor 47uF 16V 1 AA C5 RC-KZA087DRE0 Capacitor 0.1uF 50V 1 AB C6 VCKYD11CY103N Capacitor 0.01uF 16V 1 AH C20 VCEAB31HW104M Capacitor 0.1uF 50V 1 AM C21 VCEAB31VW106M Capacitor 10uF 35V 1 AA C40 VCKYD11CY103N Capacitor 0.01uF 16V 1 AH C61-64 VCKYD11HB331K Capacitor 330pF 50V 4 AA C70 VCKYD11CY103N Capacitor 0.01uF 16V 1 AH C71 VCCCF61HH330J Capacitor 33pF 50V 1 AB D1 RSRCDA013DRE0 Diode bridge (S1NB10) 1 AG D2-4 VHD1SS270A/-1 Diode (1SS270ATA) 3 AA D20-22 VHD1SS270A/-1 Diode (1SS270ATA) 3 AA D40 VHD1SS270A/-1 Diode (1SS270ATA) 1 AA IC1 RH-IZA738DRE0 LSI 1 AP LD1-5 VHPSLZ381A9-3 Light emitting diode 5 AC Q1 VS2SA933S//-3 Transistor (2SA933) 1 AB Q2 VS2SB1238//-3 Transistor (2SB1238) 1 AA Q20 VSKRA101M//-3 Transistor (KRA101M) 1 AB Q21 VSKRC243M//-3 Transistor (KRC243M) 1 AB Q22 VSDTA143ES/1B Transistor (DTA143ES) 1 AA Q30 VSKRA101M//-3 Transistor (KRA101M) 1 AB R1 VRS-B13AA911J Resistor 910 ohm 1W 1 AB R2 VRD-B12EF102J Resistor 1.0k ohm 1/4W 1 AA R3-5 VRD-B12EF153J Resistor 15k ohm 1/4W 3 AA R6 VRD-B12EF270J Resistor 27 ohm 1/4W 1 AA R7 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA R20 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA R22 VRD-B12EF560J Resistor 56 ohm 1/4W 1 AA R30 VRD-B12EF332J Resistor 3.3k ohm 1/4W 1 AA R40 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA R41 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA R51-60 VRD-B12EF153J Resistor 15k ohm 1/4W 10 AA R61-64 VRD-B12EF224J Resistor 220k ohm 1/4W 4 AA R71 VRN-B12EK103F Resistor 10k ohm 1/4W 1 AA RY1 RRLY-A021DRE0 Relay (OJSH112LM-UL) 1 AH RY2 RRLY-A094DRE0 Relay (OMIF-S-112LM) 1 AN SP30 RALM-A014DRE0 Buzzer (PKM22EPT-THAI) 1 AG T1 RTRNPA073DRE0 Transformer 1 AX
2nd interlock switch, door sensing switch and outer case switches
4AK
CABINET PARTS
CONTROL PANEL PARTS
35
Page 62
R-310AK R-330AK R-330AW
REF. NO. PART NO. DESCRIPTION Q'TY CODE
VRS1 RH-VZA032DRE0 Varistor (10G471K) 1 AE ZD1 VHEHZ4C3///-1 Zener diode (HZ4C-3) 1 AA 3- 2 FPNLCB264WRK0 Control panel frame with key unit 1 BB 3- 2- 1 FUNTKA786WRE0 Key unit 1 AX 3- 3 PSHEPA585WRE0 LED sheet 1 AM 3- 4 LHLD-A164WRF0 LED holder 1 AD 3- 5 QCNC-A007WRE0 Rubber connector 1 AE 3- 6 RLCDSA038DRE0 Liquid crystal display 1 AN 3- 7 JBTN-B028WRF0 Open button 1 AG 3- 8 MSPRCA050WRE0 Open button spring 1 AB 3- 9 XEPSD30P08XS0 Screw: 3mm x 8mm 4 AA
OVEN PARTS
4- 1 MLEVFA082WRE0 Actuator 1 AD 4- 2 PHOK-A098WRF0 Switch holder 1 AP 4- 3 PHOK-A095WRF0 Latch hook 1 AN 4- 4 LBNDKA099WRW0 Capacitor holder 1 AD 4- 5 NFANJA029WRE0 Fan blade 1 AL 4- 6 PDUC-A652WRP0 Fan duct 1 AU 4- 7 FOVN-A371WRT0 Oven cavity 1 BC 4- 8 LANGFA180WRW0 Chassis support 1 AM 4- 9 LANGQA452WRP0 Partition angle 1 AK 4-10 LANGQA454WRP0 MG thermo angle 1 AH 4-11 MLEVPA194WRF0 Switch lever 1 AG 4-12 NCPL-A045WRF0 Coupling 1 AH 4-13 PCUSGA385WRP0 Cushion 1 AK 4-14 PCOVPA275WRE0 Waveguide cover 1 AR 4-15 PCUSGA339WRP0 Cushion 1 AG 4-16 PCUSUA212WRP0 Cushion 1 AB 4-17 PCUSUA235WRP0 Cushion 1 AF 4-18 PCUSUA376WRP0 Cushion 1 AG 4-19 PCUSUA278WRP0 Cushion 1 AC 4-20 PGIDHA058WRP0 MG. air guide 1 AF 4-21 PPACGA041WRE0 Cushion 1 AE 4-22 PPACGA084WRF0 TTM packing 1 AF
DOOR PARTS
5- 1 FDORFA303WRT0 Door panel 1 BA 5- 2 PSHEPA382WRE0 Sealer film 1 AH 5- 3 GWAKPA448WRR0 Door frame 1 AW 5- 4 HPNL-A662WRE0 Door screen 1 AK 5- 5 GCOVHA370WRF0 Choke cover 1 AM 5- 6 LSTPPA139WRF0 Latch head 1 AF 5- 7 MSPRTA084WRE0 Latch spring 1 AB 5- 8 LSTPPA162WRF0 Door stopper 1 AE 5- 9 XCPSD40P06000 Screw : 4mm x 6mm 2 AA
MISCELLANEOUS
6- 1 FROLPA079WRK0 Turntable support 1 AQ 6- 2 NTNT-A079WRE0 Turntable tray 1 AR 6- 3 FW-VZB547WRE0 Main wire harness (until September 1996 production) 1 AX 6- 3 FW-VZB572WRE0 Main wire harness (from October 1996 production) 1 BC 6- 4 QW-QZA150WRE0 High voltage wire B 1 AF 6- 5 PZET-A012WRE0 Terminal insulator 1 AB 6- 6 TCAUAA166WRR0 DHHS caution label 1 AC 6- 7 TCAUAA200WRR0 Monitor caution label 1 AB 6- 8 TCADCA611WRR0 Instruction book 1 AE 6- 9 TSPCNC381WRR0 Rating label 1 AF
SCREWS,NUTS AND WASHERS
7- 1 XFPSD40P08K00 Screw : 4mm x 8mm 7 AA 7- 2 XFPSD30P06000 Screw : 3mm x 6mm 1 AA 7- 3 XHTSD40P08RV0 Screw : 4mm x 8mm 4 AA 7- 4 XHTSD40P12RV0 Screw : 4mm x 12mm 1 AA 7- 5 XOTSD40P12RV0 Screw : 4mm x 12mm 8 AA 7- 6 XOTSD40P12000 Screw : 4mm x 12mm 12 AA 7- 7 XOTSF40P08000 Screw : 4mm x 8mm 1 AA
36
Page 63
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
Order Parts from the authrized SHARP parts Distributor for your area. Defective parts required return should be returned as indicated in the Service Policy.
R-310AK R-330AK R-330AW
1
A
B
C
D
E
2
PACKING AND ACCESSORIES (R-310AK)
DOOR PROTECTION SHEET SPADPA204WRE0
6- 8 INSTRUCTION BOOK & PRINTING MATTER
6- 2 TURNTABLE TRAY
6- 1 TURNTABLE SUPPORT
3
45
TOP PAD ASSEMBLY FPADBA341WRK0
CABINET COVER SPAKHA003WRE0
PLASTIC BAG SSAKHA034WRE0
BOTTOM PAD ASSEMBLY FPADBA342WRK0
6
A
B
C
D
E
F
G
H
INTO THE OVEN CAVITY
1
Not replaceable items.
2
TRAY PACK SPADFA397WRE0
3
37
PACKING CASE SPAKCC831WRE0
45
F
G
H
6
Page 64
R-310AK R-330AK R-330AW
1
2
OVEN AND CABINET PARTS (R-310AK)
A
4-18
1-11
B
4-9
1-4
C
4-17
6-7
1-10
3
7-5
7-3
4-10
7-2
1-13
4-19
45
2-1
7-1
6-9
1-8
4-16
6
7-5
A
7-5
B
7-7
C
6-6
D
4-7
E
4-12
4-14
F
2-2
G
7-6
2-4
1-12
4-22
7-1
4-11
7-5
7-5
4-15
4-3
4-13
1-1
1-1
1-14
1-2
1-1
1-3
4-21
7-6
1-1
7-6
7-5
1-9
4-20
1-5
7-3
for the oven from  Oct./ 1996 production
4-1
4-2
4-4
7-1
1-7
7-4
4-6
4-5
1-6
4-8
7-3
D
E
7-1
7-3
F
6-2
G
7-6
H
1
2-5
7-6
7-6
2
7-6
7-6
7-6
2-4
3
38
2-3
6-1
45
H
6
Page 65
R-310AK
5-8
5-2
5-5
5-1
5-4
5-3
5-6
5-7
Actual wire harness may be different from illustration.
6-4
6-5
6-3
(HIGH VOLTAGE TRANSFORMER)
(CAPACITOR)
3-2
3-6
3-5
3-3
3-1
3-4
3-9
3-7
3-8
3-2-1
3-1
Before attaching Control unit to Control panel, Foil side of Control unit must be cleaned by ethyl-alcohol.
5-9
R-330AK R-330AW
CONTROL PANEL, DOOR AND MISCELLANEOUS PARTS (R-310AK)
A
B
C
D
1
2
3
45
6
A
B
C
D
E
F
G
E
F
G
H
1
2
3
39
45
H
6
Page 66
R-310AK R-330AK R-330AW
PARTS LIST FOR R-330AK/AW
REF. NO. PART NO. DESCRIPTION Q'TY CODE
ELECTRIC PARTS
1- 1 QSW-MA110WRE0 1- 2 QFSHDA009WRE0 Fuse holder 1 AH 1- 3 FFS-BA012WRK0 Monitor fuse and monitor switch assembly 1 AH 1- 4 RTHM-A078WRE0 Thermal cut-out 125 deg. 1 AL 1- 5 FACCDA048WRE0 Power supply cord 1 AW 1- 6 FH-DZA075WRK0 High voltage rectifier assembly 1 AS 1- 7 RC-QZA211WRE0 High voltage capacitor 1 AW 1- 8 RV-MZA197WRE0 Magnetron 1 BN 1- 9 RMOTEA338WRE0 Fan motor 1 AV 1-10 QSOCLA021WRE0 Oven lamp socket 1 AH 1-11 RLMPTA030WRE0 Oven lamp 1 AF 1-12 RMOTDA161WRE0 Turntable motor 1 AU 1-13 RTHM-A079WRE0 Thermal cut-out 95 deg. 1 AL 1-14 RTRN-A508WRE0 Power transformer 1 BM 1-15 FDTCTA173WRK0 AH. sensor assembly 1 AV
2- 1 GCABUA581WRP0 Outer case cabinet [R-330AK] 1 BA 2- 1 GCABUA584WRT0 Outer case cabinet [R-330AW] 1 BB 2- 2 GDAI-A261WRW0 Bottom plate left 1 AP 2- 3 GDAI-A286WRW0 Bottom plate right 1 AN 2- 4 GLEGPA006WRE0 Foot 2 AB 2- 5 GLEGPA067WRE0 Leg 1 AE
3- 1 CPWBFA710WRK0 Control unit 1 BN 3- 1A QCNCMA394DRE0 2-pin connector (CN-A) 1 AD 3- 1B QCNCWA057DRE0 12-pin connector (CN-G) 1 AF 3- 1C QCNCMA237DRE0 3-pin connector (CN-F) 1 AD 3- 1D FW-VZA195DRE0 Switch harness A (SN-A) 1 AD 3- 1E FW-VZA197DRE0 Switch harness B (SN-B) 1 AD 3- 1F FW-VZA196DRE0 Lead wire harness (WH-A) 1 AD C1 RC-KZA087DRE0 Capacitor 0.1uF 50V 1 AB C2 VCEAB31CW108M Capacitor 1000uF 16V 1 AD C3 RC-KZA087DRE0 Capacitor 0.1uF 50V 1 AB C4 VCEAB31VW106M Capacitor 10uF 35V 1 AA C5 VCEAB31CW476M Capacitor 47uF 16V 1 AA C6-7 RC-KZA087DRE0 Capacitor 0.1uF 50V 2 AB C8-9 VCKYD11CY103N Capacitor 0.01uF 16V 2 AH C20 VCEAB31HW104M Capacitor 0.1uF 50V 1 AM C30 VCKYD11CY103N Capacitor 0.01uF 16V [ 1 AH C60-63 VCKYD11HB331K Capacitor 330pF 50V 4 AA CF1 RCRS-A012DRE0 Ceramic resonator (CST4.00MGW) 1 AD D1 RSRCDA013DRE0 Diode bridge (S1NB10) 1 AG D20-22 VHD1SS270A/-1 Diode (1SS270ATA) 3 AA D30 VHD1SS270A/-1 Diode (1SS270ATA) 1 AA D50-51 VHD1SS270A/-1 Diode (1SS270ATA) 2 AA IC1 RH-IZA737DRE0 LSI 1 AW IC2 RH-IZA495DRE0 IC 1AL LD1-5 VHPSLZ381A9-3 Light emitting diode 5 AC Q1 VS2SB1238//-3 Transistor (2SB1238) 1 AA Q2 VSDTA123ES/-3 Transistor (DTA123E TP) 1 AA Q3 VSKRA101M//-3 Transistor (KRA101M) 1 AB Q20 VSKRA101M//-3 Transistor (KRA101M) 1 AB Q21 VSKRC243M//-3 Transistor (KRC243M) 1 AB Q22 VSDTA143ES/1B Transistor (DTA143ES) 1 AA Q40 VSKRA101M//-3 Transistor (KRA101M) 1 AB Q50 VS2SB1238//-3 Transistor (2SB1238) 1 AA R1 VRD-B12EF242J Resistor 2.4k ohm 1/4W 1 AA R2 VRD-B12HF681J Resistor 680 ohm 1/2W 1 AA R3 VRD-B12HF511J Resistor 510 ohm 1/2W 1 AB R4 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA R5-7 VRD-B12EF103J Resistor 10k ohm 1/4W 3 AA R8 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA R30 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AA R31 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA R40 VRD-B12EF332J Resistor 3.3k ohm 1/4W 1 AA R50 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA R52 VRD-B12EF270J Resistor 27 ohm 1/4W 1 AA R60-71 VRD-B12EF153J Resistor 15k ohm 1/4W 12 AA
2nd interlock switch, door sensing switch and outer case switches
4AK
CABINET PARTS
CONTROL PANEL PARTS
40
Page 67
R-310AK R-330AK R-330AW
REF. NO. PART NO. DESCRIPTION Q'TY CODE
R72-75 VRD-B12EF104J Resistor 100k ohm 1/4W 4 AA R80 VRD-B12EF105J Resistor 1M ohm 1/4W 1 AA R90 VRS-B13AA331J Resistor 330 ohm 1W 1 AA RY1 RRLY-A075DRE0 Relay (OJE-SS-124LM) 1 AG RY2 RRLY-A076DRE0 Relay (OMIF-S-124LM) 1 AK SP40 RALM-A014DRE0 Buzzer (PKM22EPT-THAI) 1 AG T1 RTRNPA020DRE0 Transformer 1 AM VRS1 RH-VZA034DRE0 Varistor (10G471K) 1 AD ZD1 VHEHZ161///-1 Zener diode (HZ16-1) 1 AA ZD2 VHEHZ5C2///-1 Zener diode (HZ5C2) 1 AA ZD3 VHEHZ4A2///-1 Zener diode (HZ4A2) 1 AA 3- 2 FPNLCB262WRK0 Control panel frame with key unit [R-330AK] 1 BB 3- 2 FPNLCB263WRK0 Control panel frame with key unit [R-330AW] 1 BB 3- 2- 1 FUNTKA784WRE0 Key unit [R-330AW] 1 AY 3- 2- 1 FUNTKA785WRE0 Key unit [R-330AK] 1 AX 3- 3 PSHEPA585WRE0 LED sheet 1 AM 3- 4 LHLD-A164WRF0 LED holder 1 AD 3- 5 QCNC-A007WRE0 Rubber connector 1 AE 3- 6 RLCDSA039DRE0 Liquid crystal display 1 AN 3- 7 JBTN-B028WRF0 Open button [R-330AK] 1 AG 3- 7 JBTN-B029WRF0 Open button [R-330AW] 1 AG 3- 8 MSPRCA050WRE0 Open button spring 1 AB 3- 9 XEPSD30P08XS0 Screw: 3mm x 8mm 4 AA
OVEN PARTS
4- 1 MLEVFA082WRE0 Actuater 1 AD 4- 2 PHOK-A098WRF0 Switch holder 1 AP 4- 3 PHOK-A095WRF0 Latch hook 1 AN 4- 4 LBNDKA099WRW0 Capacitor holder 1 AD 4- 5 NFANJA029WRE0 Fan blade 1 AL 4- 6 PDUC-A652WRP0 Fan duct 1 AU 4- 7 FOVN-A371WRT0 Oven cavity 1 BC 4- 8 LANGFA180WRW0 Chassis support 1 AM 4- 9 LANGQA452WRP0 Partition angle 1 AK 4-10 LANGQA454WRP0 MG thermo angle 1 AH 4-11 MLEVPA194WRF0 Switch lever 1 AG 4-12 NCPL-A045WRF0 Coupling 1 AH 4-13 PCUSGA385WRP0 Cushion 1 AK 4-14 PCOVPA275WRE0 Waveguide cover 1 AR 4-15 PCUSGA339WRP0 Cushion 1 AG 4-16 PCUSUA212WRP0 Cushion 1 AB 4-17 PCUSUA235WRP0 Cushion 1 AF 4-18 PCUSUA376WRP0 Cushion 1 AG 4-19 PCUSUA278WRP0 Cushion 1 AC 4-20 PGIDHA058WRP0 MG. air guide 1 AF 4-21 PPACGA041WRE0 Cushion 1 AE 4-22 PPACGA084WRF0 TTM packing 1 AF 4-23 PCOVPA254WRP0 Air duct 1 AP
DOOR PARTS
5- 1 FDORFA303WRT0 Door panel 1 BA 5- 2 PSHEPA382WRE0 Sealer film 1 AH 5- 3 GWAKPA446WRR0 Door frame [R-330AK] 1 AW 5- 3 GWAKPA450WRR0 Door frame [R-330AW] 1 AW 5- 4 HPNL-A662WRE0 Door screen [R-330AK] 1 AK 5- 4 HPNL-A663WRR0 Door screen [R-330AW] 1 AL 5- 5 GCOVHA370WRF0 Choke cover 1 AM 5- 6 LSTPPA139WRF0 Latch head 1 AF 5- 7 MSPRTA084WRE0 Latch spring 1 AB 5- 8 LSTPPA162WRF0 Door stopper 1 AE 5- 9 XCPSD40P06000 Screw : 4mm x 6mm 2 AA
MISCELLANEOUS
6- 1 FROLPA079WRK0 Turntable support 1 AQ 6- 2 NTNT-A079WRE0 Turntable tray 1 AR 6- 3 FW-VZB547WRE0 Main wire harness (until September 1996 production) 1 AX 6- 3 FW-VZB572WRE0 Main wire harness (from October 1996 production) 1 BC 6- 4 QW-QZA150WRE0 High voltage wire B 1 AF 6- 5 PZET-A012WRE0 Terminal insulator 1 AB 6- 6 TCAUAA166WRR0 DHHS caution label 1 AC 6- 7 TCAUAA200WRR0 Monitor caution label 1 AB 6- 8 TCADCA610WRR0 Instruction book 1 AF 6- 9 TSPCNC379WRR0 Rating label [R-330AK] 1 AF
41
Page 68
R-310AK R-330AK R-330AW
REF. NO. PART NO. DESCRIPTION Q'TY CODE
6- 9 TSPCNC382WRR0 Rating label [R-330AW] 1 AD 6-10 TLABMA532WRR0 Menu label 1 AD
SCREWS,NUTS AND WASHERS
7- 1 XFPSD40P08K00 Screw : 4mm x 8mm 7 AA 7- 2 XFPSD30P06000 Screw : 3mm x 6mm 2 AA 7- 3 XHTSD40P08RV0 Screw : 4mm x 8mm 4 AA 7- 4 XHTSD40P12RV0 Screw : 4mm x 12mm 1 AA 7- 5 XOTSD40P12RV0 Screw : 4mm x 12mm 10 AA 7- 6 XOTSD40P12000 Screw : 4mm x 12mm 12 AA 7- 7 XOTSF40P08000 Screw : 4mm x 8mm [R-330AK] 1 AA 7- 7 XOTSE40P08000 Screw : 4mm x 8mm [R-330AW] 1 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
Order Parts from the authrized SHARP parts Distributor for your area. Defective parts required return should be returned as indicated in the Service Policy.
42
Page 69
R-310AK R-330AK R-330AW
1
2
OVEN AND CABINET PARTS (R-330AK/AW)
A
4-18
1-11
B
7-2
1-15
C
4-23
4-17
4-9
1-4
6-7
7-5
7-5
3
7-5
1-10
7-2
1-13
4-10
7-3
4-19
45
2-1
7-1
6-9
1-8
4-16
6
7-5
A
7-5
B
7-7
C
6-6
D
4-7
6-10
E
4-12
4-14
F
2-2
G
7-6
2-4
1-12
4-22
7-1
7-5
4-11
7-5
4-15
4-3
4-13
1-1
1-1
1-14
1-2
1-1
1-3
4-21
7-6
1-1
7-6
1-9
7-5
4-20
1-5
7-3
for the oven from  Oct./ 1996 production
4-1
4-2
4-4
7-1
1-7
7-4
4-6
4-5
1-6
4-8
7-3
D
E
7-1
7-3
F
6-2
G
7-6
H
1
2-5
7-6
7-6
2
7-6
7-6
7-6
2-4
3
43
2-3
6-1
45
H
6
Page 70
R-310AK R-330AK R-330AW
1
2
3
45
CONTROL PANEL, DOOR AND MISCELLANEOUS PARTS (R-330AK/AW)
A
3-1
3-3
3-5
3-4
3-9
3-2
B
C
3-2-1
3-6
3-1
Before attaching Control unit to Control panel, Foil side of Control unit must be cleaned by ethyl­alcohol.
D
5-5
6
A
B
C
5-8
D
E
F
G
3-7
5-9
3-8
5-2
5-1
E
5-4
5-3
F
5-6
G
5-7
H
Actual wire harness may be different from illustration.
1
6-3
2
(HIGH VOLTAGE TRANSFORMER)
6-4
6-5
3
44
(CAPACITOR)
45
H
6
Page 71
R-310AK R-330AK R-330AW
1
PACKING AND ACCESSORIES
A
B
C
2
DOOR PROTECTION SHEET SPADPA204WRE0
6- 8 INSTRUCTION BOOK & PRINTING MATTER
6- 2 TURNTABLE TRAY
6- 1 TURNTABLE SUPPORT
3
45
TOP PAD ASSEMBLY FPADBA341WRK0
CABINET COVER (R-330AK only) SPAKHA003WRE0
PLASTIC BAG SSAKHA034WRE0
BOTTOM PAD ASSEMBLY FPADBA342WRK0
6
A
B
C
D
E
F
G
INTO THE OVEN CAVITY
TRAY PACK SPADFA397WRE0
Not replaceable items.
PACKING CASE SPAKCC829WRE0 (R-330AK) SPAKCC832WRE0 (R-330AW)
D
E
F
G
H
1
2
3
45
45
H
6
Page 72
R-310AK R-330AK R-330AW
46
'96 SHARP CORP. (8K4.150E) Printed in U.S.A
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