Sharp R-320FQ Service Manual

Sharp R-320FQ Manual

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  • Sharp R-320FQ | Service Manual - Page 1
    R-320FQ R-320FW SERVICE MANUAL S3205R320FPW/ MICROWAVE OVEN MODELS R-320FK R-320FQ R-320FW 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. WARNING TO SERVICE PERSONNEL: Microwave ovens contain circuitry
  • Sharp R-320FQ | Service Manual - Page 2
    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
  • Sharp R-320FQ | Service Manual - Page 3
    320FK R-320FQ R-320FW WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts Read the Service Manual carefully and follow all instructions. Don't Touch ! Danger High Voltage Before Servicing 1. Disconnect
  • Sharp R-320FQ | Service Manual - Page 4
    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
  • Sharp R-320FQ | Service Manual - Page 5
    SERVICE MANUAL MICROWAVE OVEN R-320FK/ R-320FQ/ R-320FW FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN,R-320FK, R-320FQ and R-320FW. It is recommended that service personnel carefully
  • Sharp R-320FQ | Service Manual - Page 6
    320FK R-320FQ R-320FW ITEM Power Requirements Power Output Case Dimensions Cooking Cavity Dimensions 1.2 Cubic Feet Control Complement Oven (0 - 99 min. 99 seconds) Microwave Power for Variable Cooking Repetition Rate; HIGH GENERAL INFORMATION GROUNDING INSTRUCTIONS This oven is equipped with
  • Sharp R-320FQ | Service Manual - Page 7
    latches 6 The oven will not operate unless the door is securely close. 9 3. Removable turntable support 4. Removable turntable guide cover 12. Power supply cord R-320FK R-320FQ R-320FW NOTE: Some one-touch cooking features such as "MINUTE PLUS"are disabled after three minutes when the oven
  • Sharp R-320FQ | Service Manual - Page 8
    opened.) When oven is plugged in, 120 volts A.C. is supplied to the control unit. (Figure O-1). The display will show "SHARP SIMPLY THE BEST 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
  • Sharp R-320FQ | Service Manual - Page 9
    . MICROWAVE 2. Heat Potates MICROWAVE 3. Sensor detects moisture and humidity and calculates cooking time and variable power. Cooking Sequence. 1. Operate the oven in sensor cooking mode by referring to the operation manual. NOTE: The oven energized and the power transformer, oven lamp, etc. are turned
  • Sharp R-320FQ | Service Manual - Page 10
    R-320FK R-320FQ R-320FW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY MONITOR FUSE 20A A2 THERMAL CUT-OUT (OVEN) THERMAL CUT- 60 Hz GRN CONTROL UNIT COM. COM. SH-B SH-A OL OVEN LAMP SECONDARY INTERLOCK SWITCH TTM FM TURNTABLE MOTOR FAN MOTOR DOOR SENSING
  • Sharp R-320FQ | Service Manual - Page 11
    AND FUNCTION OF COMPONENTS R-320FK R-320FQ R-320FW DOOR OPEN 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
  • Sharp R-320FQ | Service Manual - Page 12
    TROUBLESHOOTING GUIDE Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected. 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
  • Sharp R-320FQ | Service Manual - Page 13
    R-320FK R-320FQ R-320FW CK = Check / RE = Replace RE RE A B C D E F F G H RE RE CK I CK CK CK J K L M N POSSIBLE CAUSE AND DEFECTIVE PARTS SHORT WRONG OPERATION LOW VOLTAGE DIRTY OVEN CAVITY KEY UNIT RELAY (RY1) DEFROST CENTER FOIL PATTERN ON PWB. AH SENSOR CONDITION PROBLEM Home fuse or circuit
  • Sharp R-320FQ | Service Manual - Page 14
    R-320FK R-320FQ R-320FW TEST PROCEDURES PROCEDURE LETTER A MAGNETRON ASSEMBLY TEST COMPONENT TEST case is installed. 9. Run the oven and check all functions. MICROWAVE OUTPUT POWER The following test procedure should be carried out with the microwave oven in a fully assembled condition (outer
  • Sharp R-320FQ | Service Manual - Page 15
    TEST PROCEDURES R-320FK R-320FQ R-320FW PROCEDURE LETTER COMPONENT TEST (HIGH VOLTAGES ARE unit. Check for restricted air flow through the vent holes of the oven cavity, especially the cooling fan and air guide. 5. Reconnect all leads removed from components during testing. 6. Reinstall the
  • Sharp R-320FQ | Service Manual - Page 16
    R-320FK R-320FQ R-320FW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. Reconnect all leads removed from components during testing. 6. Reinstall the outer case (cabinet). 7. Reconnect the power supply cord after the outer case is installed. 8. Run the oven and check all functions. CAUTION: IF
  • Sharp R-320FQ | Service Manual - Page 17
    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
  • Sharp R-320FQ | Service Manual - Page 18
    320FK R-320FQ R-320FW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 2) Re-install the outer case (cabinet). 3) Reconnect the power supply cord after the outer case is installed. 4) Run the oven of all digits flicker. 2-3 Other possible problems caused by defective control unit. a) Buzzer does
  • Sharp R-320FQ | Service Manual - Page 19
    R-320FK R- 7. Reconnect the power supply cord after the outer case is installed. 8. Run the oven and check all functions. G8 G7 G6 G5 G4 G3 G2 G1 G 9 3 voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation. DC. voltage indicated Defective relay. DC. voltage
  • Sharp R-320FQ | Service Manual - Page 20
    model is parts. 6) Reconnect all leads removed from components during testing. 7) Re-install the outer case (cabinet). 8) Reconnect the power supply cord after the outer case is installed. 9) Run the oven and check all functions. RY1 RY3 d c b (J1) a T1 VRS1 2. Follow the troubleshooting guide
  • Sharp R-320FQ | Service Manual - Page 21
    oven and check all functions. R-320FK R-320FQ R- to the "INSTALLATION INSTRUCTIONS" of the operation manual. (4) Exhaust vents seconds, microwave energy is produced. If ERROR is displayed or the oven does not oven stops after 5 minutes and ERROR is displayed, the AH sensor is normal. Check other parts
  • Sharp R-320FQ | Service Manual - Page 22
    and the number pad 4. 9-5. The control panel is in automatic Sensor operation. 9-6. The oven turns off automatically, and the time for detecting moisture will be displayed. If new sensor dose not operate properly, the problem is with the control unit, and refer to explanation below. CHECKING CONTROL
  • Sharp R-320FQ | Service Manual - Page 23
    TOUCH CONTROL PANEL ASSEMBLY R-320FK R-320FQ R-320FW OUTLINE OF TOUCH CONTROL PANEL The touch control 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
  • Sharp R-320FQ | Service Manual - Page 24
    R-320FK R-320FQ the cook relay (RY2). The OFF signals holds "L" level during microwave Maximum output cooking and "H" level while not cooking. In ON sec. H : GND L : -5V H : GND L : -5V 17 P04 OUT Oven lamp, fan motor and turntable motor driving signal To turn on and off shut off relay (RY1
  • Sharp R-320FQ | Service Manual - Page 25
    R-320FK R-320FQ R-320FW Pin No. 23 Signal P114 I/O OUT 24 P115 OUT 25 P116 OUT 26 sensor circuit, and connected to the A/D converter built into the LSI. Input terminal to judge the model. The signal out of P117 will be input into ANI6 through G1 line on key matrix. The LSI will judge the
  • Sharp R-320FQ | Service Manual - Page 26
    R-320FK R-320FQ R-320FW Pin No. 49 Signal P36 I/O OUT 50 P37 IN 51 COM0 OUT 52 COM1 OUT 53 COM2 OUT 54 COM3 OUT 55 BIAS
  • Sharp R-320FQ | Service Manual - Page 27
    ABSOLUTE HUMIDITY SENSOR CIRCUIT R-320FK R-320FQ R-320FW (1) Structure of Absolute Humidity Sensor The from the external airflow. ventilation opening for sensing Thermistors Sensing part (Open vessel) Sensing part (Closed vessel) (2) Operational Principle of Absolute Humidity Sensor The
  • Sharp R-320FQ | Service Manual - Page 28
    the technician as shown in the figure and use grounded soldering iron and work table. approx. 1M ohm 2. Servicing of Touch Control Panel We describe the procedures to permit servicing of the touch control panel of the microwave oven and the precautions you must take when doing so. To perform the
  • Sharp R-320FQ | Service Manual - Page 29
    COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE R-320FK R-320FQ R-320FW WARNING AGAINST HIGH VOLTAGE: Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in severe, possibly fatal, electric shock. (Example) High Voltage
  • Sharp R-320FQ | Service Manual - Page 30
    320FK R-320FQ R-320FW CAUTION: 1. DISCONNECT OVEN FROM POWER SUP PLY BEFORE REMOVING OUTER CASE. 2. DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN chassis support to magnetron, oven cavity back plate, oven cavity front flange and fan duct. 6. Remove the chassis support from oven. 7.
  • Sharp R-320FQ | Service Manual - Page 31
    . 2. Insert the two (2) tabs of the chassis support to the oven cavity front plate and the back plate. 3. Hold the chassis support to the oven cavity back plate, oven cavity front flange, magnetron and the fan duct with the five (5) screws. R-320FK R-320FQ R-320FW 4. Reconnect the wire leads to the
  • Sharp R-320FQ | Service Manual - Page 32
    R-320FK R-320FQ R-320FW 3. Discharge high voltage capacitor. 4. Disconnect the wire leads from the fan motor and the oven lamp. 5. Remove the magnetron and chassis support from the waveguide flange, referring to "MAGNETRON REMOVAL". 6. Release the snap of the main wire harness from the fan duct. 7.
  • Sharp R-320FQ | Service Manual - Page 33
    320FK microwave leakage around door with an approved microwave survey meter. (Refer to Microwave door frame as shown in Figure C-4 to free engaging parts. 4. Pry the choke cover by inserting a putty lower oven hinges. 7. Re-install choke cover to door panel by pushing. Note: After any service to
  • Sharp R-320FQ | Service Manual - Page 34
    R-320FK R-320FQ R-320FW 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
  • Sharp R-320FQ | Service Manual - Page 35
    HOLDER BLK SECONDARY INTERLOCK NO SWITCH COM. GRY WHT WHT WHT BLK BLK THERMAL CUT-OUT (OVEN) FAN MOTOR BLK BLK GRY WHT TURNTABLE MOTOR BLK WHT Figure S-1. Pictorial Diagram E E D HIGH VOLTAGE CAPACITOR POWER TRANSFORMER H.V. RECTIFIER A A 6 5 4 3 2 1 R-320FK R-320FQ R-320FW
  • Sharp R-320FQ | Service Manual - Page 36
    R-320FK R-320FQ R-320FW 1 2 3 4 5 6 A A B GND C AC A 1 D20 3 6 S1NB10 10G471K VRS1 A 2 CN-A d1 4 + a T1 - (J1) b D c OVEN LAMP FAN MOTOR RY1 TURNTABLE COM MOTOR E J2 AC NO D 1 (CN-D) D 3 RY2 MICRO NO F COM B 2 SH-A SH-B B 1 (CN-B) G DOOR SENSING SWITCH
  • Sharp R-320FQ | Service Manual - Page 37
    510 1/2w LD1 LD2 LD3 LD4 VA C-1 R4 27 1/4w Q2 KTA1661 R6 3.3k 1/4w BUZZER C-5 OVEN LAMP TURNTABLE C-6 MOTOR FAN MOTOR MICRO C-7 D10 MA152WA Q3 KRC243S + - TOP HEATER DOOR SENSING SWITCH C-8 15k 5 5 6 6 Figure S-3. CPU Unit Circuit R-320FK R-320FQ R-320FW A B C D E F G H
  • Sharp R-320FQ | Service Manual - Page 38
    R-320FK R-320FQ R-320FW 1 2 3 4 5 6 A A DIP CN - C (RED) (GREEN) SH - B SH - A B R3 1 12 1 2 B C3 R5 SW C4 R6 R2 E B R1 ZD1 1 2 (CN - B) C1 C C SP1 B (J2) C5 Q3 (R9) E (
  • Sharp R-320FQ | Service Manual - Page 39
    Capacitor holder 1 4- 5 NFANJA029WRE0 Fan blade 1 4- 6 PDUC-A790WRWZ Fan duct 1 ∆ 4- 7 Oven cavity (Not a replaceable part) 1 4- 8 LANGFA194WRW0 Chassis support 1 4- 9 PCUSGA560WREZ Cushion 1 4-10 LANG-A079WRWZ Air guide 1 R-320FK R-320FQ R-320FW CODE AG AH AH AS AK AQ AQ AP AU
  • Sharp R-320FQ | Service Manual - Page 40
    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 authorized SHARP parts Distributor for your area. Defective parts requiring return should be returned as indicated in the Service Policy. 38
  • Sharp R-320FQ | Service Manual - Page 41
    1 2 3 OVEN AND CABINET PARTS A 1-14 7-2 4-25 4-22 4-23 B 4-17 4-9 1-4 7-6 4-23 C 7-6 4-24 4-11 4-20 4-7 6-7 4-13 7-3 R-320FK R-320FQ R-320FW 4 5 6 2-1 7-6 7-8 A 7-6 7-10 1-8 6-6 7-8 B 7-7 C 7-6 4-10 7-3 4-21 D 4-12 E 4-14 6-2 F 6-1 G 7-6 1-5 D 7-4 4-2 1-12 4-26
  • Sharp R-320FQ | Service Manual - Page 42
    R-320FK R-320FQ R-320FW 1 2 3 4 5 6 CONTROL PANEL PARTS A 3-2 A 3-6 3-5 3-3 B 3-4 B C 3-3-1 D E 5-3 F 5-4 G H 1 2 3-1 3-6 DOOR PARTS C 5-11 5-7 5-2 5-7 D 5-1 5-10 5-9 5-10 5-9 5-7 E 5-7 5-7 F 5-5 5-6 5-8 MISCELLANEOUS 6-3 6-5 Actual wire harness may be different from
  • Sharp R-320FQ | Service Manual - Page 43
    SHEET SPADPA204WRE0 FOAM SHEET SPAKHA012WREZ (for R-320FK/320FQ) C 6-4 INSTRUCTION BOOK & PRINTING MATTER D INTO THE OVEN CAVITY 6-2 TURNTABLE TRAY 6-1 TURNTABLE SUPPORT TRAY PACK SPADFA451WRE0 E Not replaceable items. F R-320FK R-320FQ R-320FW 5 6 A TOP PAD ASSEMBLY FPADBA458WRKZ
  • Sharp R-320FQ | Service Manual - Page 44
    R-320FK R-320FQ R-320FW COPYRIGHT © 2002 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise,
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R-320FK
R-320FQ
R-320FW
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.
WARNING TO SERVICE PERSONNEL: Microwave ovens con-
tain circuitry capable of producing very high voltage and
current, contact with following parts may result in a severe,
possibly fatal, electrical shock. (High Voltage Capacitor, High
Voltage Power Transformer, Magnetron, High Voltage Recti-
fier Assembly,
High Voltage Harness etc..)
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
...................
INSIDE FRONT COVER
BEFORE SERVICING
......................................................................................................
INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL
................................................................................................................
1
MICROWAVE MEASUREMENT PROCEDURE
...................................................................................................
2
FOREWORD AND WARNING
...............................................................................................................................
3
PRODUCT SPECIFICATIONS
..............................................................................................................................
4
GENERAL
INFORMATION
...................................................................................................................................
4
OPERATION
..........................................................................................................................................................
6
TROUBLESHOOTING GUIDE
............................................................................................................................
10
TEST PROCEDURE
............................................................................................................................................
12
TOUCH CONTROL PANEL
.................................................................................................................................
21
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
................................................................
27
PICTORIAL DIAGRAM
........................................................................................................................................
33
POWER UNIT CIRCUIT
......................................................................................................................................
34
CPU UNIT CIRCUIT
............................................................................................................................................
35
PRINTED WIRING BOARD
.................................................................................................................................
36
PARTS LIST
........................................................................................................................................................
37
PACKING AND ACCESSORIES
.........................................................................................................................
41
S3205R320FPW/
R-320FK
R-320FQ
R-320FW
MICROWAVE OVEN
MODELS
SERVICE MANUAL
SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.