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SHARP
SERVICE MANUAL
S0705R9380J//
MICROWAVE
OVEN
MODEL
R-9380
In the interests of user-safety
the set should
be restored to its original
condition
and only parts identical
to those specified
should
be used.
(RDlGlOlU)
TABLE OF CONTENTS
Page
FOREWORD
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...............................
1
CAUTION,
MICROWAVE
RADIATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
PRODUCT
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....... 2
OPERATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...............................
4
SERVICING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .........................
7
TOUCH
CONTROL
PANEL ASSEMBLY
. ..,..........,.............................................,.............*....................,....
15
COMPONENT
REPLACEMENT
AND ADJUSTMENT
PROCEDURE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
MICROWAVE
MEASUREMENT
PROCEDURE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
PICTORIAL
DIAGRAM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..........
27
CONTROL
PANEL CIRCUIT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
PRINTED
WIRING
BOARD
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 29
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . : . . . . . . . ..........................
30
PACKING
AND ACCESSORIES
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SHARPCORPORATION
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Summary of Contents for Sharp R-9380
- Page 1 SHARP SERVICE MANUAL S0705R9380J// MICROWAVE OVEN MODEL R-9380 In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified should be used. (RDlGlOlU) TABLE OF CONTENTS Page ...............................
- Page 2 DESCRIPTIOF MICROWAVE OVEN R -9380 :.-.u_i ‘- . . FOREWORD OPERATION This Manual has been prepared to provide Sharp Corp. Service Personnel with complete Operation and Service Information the SHARP MICROWAVE oven, R-9380. It is recommended that service personnel carefully study i&gji.
- Page 3 DESCRIPTION EXPLANATION OF MICROWAVE COOKING moisture content, like most foods, will absorb micro- The Sharp Microwave Oven uses microwave energy to wave energy. As the microwave energy at a frequency produce heat in the food to be cooked. Unlike con-...
- Page 4 OVEN DIAGRAM 6. Door latches 1. Ventilation openings 7. Door open button 2. Oven lamp 3. Oven door with see through window 8. Auto-Touch Control Panel 9. Digital readout 4. Removable turntable 10. Waveguide cover 5. Roller Stay 11. Access cover for oven lamp...
- Page 5 R-9380 OPERATION DESCRIPTION OF OPERATING SEQUENCE 6. When the door is opened during a cook cycle, The following is a description of component functions monitor switch, upper latch switch and lower latch during oven operation. (RD7!101Ul switch are activated with the following results.
- Page 6 Y$$& Om'Fz bS"CG amoCuJ z"Z -aaaag OE$$nga3 kOoaaot;;o nnvn>v: FZ.. <V-w "P...
- Page 7 R-9380 DESCRIPTION FUNCTION OF COMPONENTS MAGNETRON TEMP. FUSE LOWER UPPER LATCH SWITCHES The lower latch switch is mounted in the lower latch hook and temp. fuse located cavity plate near the upper latch switch is mounted in the upper latch hook. They...
- Page 8 R-9380 SERVICING TROUBLESHOOTING GUIDE IMPORTANT: If the oven becomes inoperative because of a When troubleshooting microwave oven, it is helpful blown fuse in the monitor-upper latch switch follow the Sequence of Operation in performing the checks. circuit, check the monitor...
- Page 9 R-9380 TROUBLESHOOTING GUIDE (CONT’D) TEST PROCEDURE PROBLEM POSSIBLE CAUSE CORRECTION COOKING CONDITION (CONT’D) Burned out bulb. Oven lamp does not light at all. Replace oven lamp. Open wiring to oven lamp socket. Check and repair wiring. Defective relay RY-1 on control unit.
- Page 10 R-9380 TEST PROCEDURE POSSIBLE CAUSE PROBLEM CORRECTION ’ EASY DEFROST will only operate Programmed incorrectly EASY DEFROST condition touching on a specific weight. INSTANT COOK/START Pad, Range for each food category. “ERROR” appears. See steps for Easy Defrost Operation Manual.
- Page 11 R-9380 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MAGNETRON ASSEMBLY TEST DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING OVEN COMPO- NENTS OR WIRING. To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check across the magnetron...
- Page 12 TEST PROCEDURES (CONT’D) PROCEDURE COMPONENT TEST LETTER 3. Water container should be one (1) litre beaker made of Pyrex glass and its diameter approxi- mately 12 cm. “C. 4. Room temperature should be around 5. Power supply voltage should be specification voltage.
- Page 13 R-9380 TEST PROCEDURES (CONT’D) PROCEDURE COMPONENT TEST LETTER TEMP. FUSE TEST A continuity check across the temp. fuse terminals should indicate a closed circuit unless the temperature of the temp. fuse reaches approximately 115 “C. An open magnetron temp. fuse indicates...
- Page 14 R-9380 TEST PROCEDURES (CONT’D) PROCEDURE COMPONENT TEST LETTER 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.
- Page 15 R-9380 TEST PROCEDURES (CONT’D) PROCEDURE LETTER COMPONENT TEST PROCEDURES TO BE TAKEN WHEN FOIL PATTERN ON THE PRINTED WIRING BOARD(PWB) IS OPEN. To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, and this fine pattern service as a substitute coil.
- Page 16 TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL ACL Circuit The touch control section consists of the following units as shown in the touch control panel circuit. A circuit to generate a signal which resets the LSI (1) Key Unit to the initial state when power is supplied.
- Page 17 R-9380 DESCRIPTION OF LSI LSI(IZA135DR) The I/O signal of the LSI(IZA135DR) is detailed in the following table. (RD93101 I I/O .PINNO~~~.i1~~~~~..-~--.-_--~.__l~SIGIU j OUT Segment data siqnals. Refer to the touch control panel circuit for the relationship between signals and indicators.
- Page 18 R-9380 j IN 1 SIGNAL / P53 PIN NO. / 16 e.-i_----- ~.-.--~ _~~. -..-~ Terminal for manufacture test. Normally terminal not used. (FiD931A3U) j IN 1 SIGNAL j P6o,P61 PIN NO. 1 17,16 Terminal not used. (RD93KA2U) : OUT...
- Page 19 R -9380 I I/O PIN NO. 1 27 SIGNAL 1 SO j OUT Sinnal to sound buzzer. Key touch sound (0.12 sec.). B: Completion sound (2.4 sec.j. (RD93LAl I I/O / __-__ 1 SIGNAL j NC PIN NO. / 28 Terminal not used.
- Page 20 / IN 1 SIGNAL / PO3 PIN NO. j 42 Terminal to chanqe functions accordinq 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. (Rd93JAZU) j IN 1 SIGNAL...
- Page 21 R-9380 I I/O PIN NO. / 56 1 SIGNAL / VDISP / IN Anode (seament) of Fluorescent DisDlav light-up voltage: -26.5V. Vp voltage of power source circuit input. (RD93GA3U) PIN NO. j 57 SIGNAL 1 VR / IN Reference voltage input terminal.
- Page 22 R-9380 SERVICING For those models, therefore, check and repalr Precautions Handing Electronic all the controls (with the sensor-related ones Components included) of the touch control panel while This unit uses PMOS LSI in the integral part of the keeping it in contact with the oven proper.
- Page 23 R-9380 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE There is a broken door hinge or support. WARNING: To avoid possible exposure to microwave energy; The door is bent or warped. Before operating oven There is any defective parts in the latch, oven...
- Page 24 R-9380 TURNTABLE COUPLING REMOV&L motor refer to “Turntable TURN TABLE Remove turntable COUPLING Motor Removal”. coupling following in order on 2. Remove turntable BOTTOM OVEN CAVITY illustration. T.T. MOTOR ANGLE ‘O-RING Turntable Coupling COOLING FAN MOTOR REMOVAL 4. Remove two...
- Page 25 R-9380 UPPER/LOWER LATCH SWITCHES MONITOR SWITCH ADJUSTMENT 2. The upper and lower latch switches interrupt If the upper lower latch switches and monitor circuit before the door can be opened. switch operate proper!y 3. The monitor switch contacts close when...
- Page 26 DOOR REPLACEMENT AND ADJUSTMENT DOOR REPLACEMENT DOOR ADJUSTMENT 1. Disconnect oven from power supply and remove The door can be adjusted by keeping the screws outer case. each hinge loose. 2. Remove two (2) screws holding lower oven hinge. 3. Remove the oven hinge from the door. After adjustment, make sure of the following...
- Page 27 R-9380 MICROWAVE MEASUREMENT After adjustment door latch switches, monitor Recommended instruments are: switch and door are completed individually or collec- NARDA 8100 tively, the following leakage test must be performed NARDA 8200 with a survey instrument and it must be confirmed...
- Page 28 R-9380 1.--~--.3 --o= k .- ‘I ..'------2---- .._ _..
- Page 29 R-9380 TW- ‘ i’i #I cyliK p&g@. f”- ““Wb”’ “-, till90 I ii. ” --p+- -?’...
- Page 30 R-9380 > k ‘a-se.” L li ;::y ,---- _.-- i”i::;;: iIIII ’ I L 11’ “P ,,. *--*“&.Ry2 ” v, I -1311 c:>B -...- n&i 2 q--- - ‘e T--y ~m+A “RSI Figure S-3. Printed Wiring Board...
- Page 31 PARTS LIST Note : The voltage supplied to the parts I’*” are greater than 25OV. * Refer to “REPLACEMENT PARTS LIST” described after PARTS LIST. REF. NO. PART DESCRIPTION 1 Q’TY 1 CODE ELECTRICAL PARTS QACCAAOI 8WRE0 Power supply cord QFS- COO1 9WREO...
- Page 32 R-9380 The voltage supplied to the parts ,,*” are greater than 250V. Note +I Refer to “REPLACEMENT PARTS LIST” described after PARTS LIST. Q’TY CODE DESCRIPTION PART REF. NO 22k R lf4W Resistor DZ223NDREO R78-R81 112w 91 n Resistor DZ91...
- Page 33 R-9380 Note : The voltage supplied to the parts l*” are greater than 250V. -k Refer to “REPLACEMENT PARTS LIST” described after PARTS LIST. REF. NO.1 PART DESCRIPTION 1 Q’TY 1 CODE SCREWS, NUTS AND WASHERS XOPSD50Pl 2KSO Screw ;...
- Page 34 REPLACEMENT PARTS LIST This replacement parts list shows interchangeability of marked ( * ) parts on the control panel parts to the alterations of product locations. This list has been prepared to show LISTED PART NO. along with the USED PART NO. side by side. (RDQllOlU) REF.
- Page 35 ~~~ _.___.. -... i----.----~--- I--. OVEN PARTS...
- Page 36 CABINET PARTS...
- Page 37 CONTROL PANEL PARTS B :g :- @...
- Page 38 R-9380 DOOR ASSEMBLY MISCELLANEOUS ICAP.) (TRANS.) (CAP) (MAG.)
- Page 39 R-9380 PACKING AND ACCESSORIES PACKING lCPADEAO55WRKOj DoOR PROTECT,ON SHEET (SPADP0338WREO) INSTRUCTION BOOK ‘87 0 SHARP CORP. (1 ON0.75E) Printed in Australia...