Sharp R-307KW Service Manual

Sharp R-307KW Manual

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  • Sharp R-307KW | Service Manual - Page 1
    R307KW SERVICE MANUAL S0601R307KPW/ R307KW MICROWAVE OVEN MODELS R-307KK R-307KW 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 capable
  • Sharp R-307KW | Service Manual - Page 2
    5. GENERAL INFORMATION [1] GROUNDING INSTRUCTIONS 5-1 [2] OVEN DIAGRAM 5-1 CHAPTER 6. OPERATION [1] DESCRIPTION OF OPERATING SE- QUENCE 6-1 [2] OVEN SCHEMATIC 6-2 [3] DESCRIPTION AND FUNCTION OF COMPONENTS 6-3 CHAPTER 7. TROUBLESHOOTING GUIDE [1] TROUBLESHOOTING CHART 7-1 CHAPTER 8. TEST
  • Sharp R-307KW | Service Manual - Page 3
    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
  • Sharp R-307KW | Service Manual - Page 4
    R307KW RC30H7KAWPTER 1. WARNING TO SERVICE PERSSerOviNcNe EMaLnual Microwave Service Manual carefully and follow all instructions. Don't Touch ! Danger High Voltage [1] Before Servicing the use of an insulated screwdriver. Whenever troubleshooting is performed the power supply must be disconnected
  • Sharp R-307KW | Service Manual - Page 5
    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
  • Sharp R-307KW | Service Manual - Page 6
    R307KW RC30H7KAWPTER 3. FOREWORD AND WARNINGService Manual [1] FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVENS, R-308KK and R-308KW. It is recommended that service personnel carefully
  • Sharp R-307KW | Service Manual - Page 7
    4. PRODUCT DESCRIPTION Service Manual [1] SPECIFICATIONS ITEM Power Control System Clock (1:00 - 12:59) Timer (0 - 99 minutes 99 seconds) Microwave Power for Variable Cooking Repetition Rate; P-HI Full power throughout the cooking time P-90 21, Chapter 1, Subchapter J R307KW 4 - 1
  • Sharp R-307KW | Service Manual - Page 8
    R307KW RC30H7KAWPTER 5. GENERAL INFORMATION Service Manual [1] GROUNDING INSTRUCTIONS This oven is equipped with a oven floor. 8. Removable turntable Place the turntable securely on the turntable support securely. The turntable will rotate clockwise or counterclockwise. Only remove for cleaning
  • Sharp R-307KW | Service Manual - Page 9
    2. TOUCH CONTROL PANEL R307KW NOTE: Some one-touch cooking features such as "MINUTE PLUS" are disabled after three minutes when the oven is not in use. These features are automatically enabled when the door is opened and closed or the STOP/ CLEAR pad is pressed. 5 - 2
  • Sharp R-307KW | Service Manual - Page 10
    R307KW RC30H7KAWPTER 6. OPERATION Service Manual [1] DESCRIPTION OF OPERATING SEQUENCE The following sec. 32 sec. NOTE: The ON/OFF time ratio does not correspond with the percentage of microwave power, because approx. 3 seconds are needed for heating of the magnetron filament. 4. POWER OUTPUT
  • Sharp R-307KW | Service Manual - Page 11
    L [2] OVEN SCHEMATIC 1. Off Condition SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY FUSE 20A R307KW TEMPERATURE FUSE 150ºC (MAGNETRON) TEMPERATURE FUSE 150ºC (OVEN) or THERMAL CUT-OUT 145ºC (OVEN) NOTE: " " indicates components with potentials above 250V N.O.
  • Sharp R-307KW | Service Manual - Page 12
    R307KW [3] DESCRIPTION AND FUNCTION OF COMPONENTS 1. DOOR OPEN MECHANISM The door is opened 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 temperature fuse remains closed. However
  • Sharp R-307KW | Service Manual - Page 13
    Manual R307KW 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 PROBLEM
  • Sharp R-307KW | Service Manual - Page 14
    R307KW RC30H7KAWPTER 8. TEST PROCEDURES Service Manual [1] Procedure A: MAGNETRON ASSEMBLY TEST 1. Disconnect the power the oven and check all functions. 1. MICROWAVE OUTPUT POWER The following test procedure should be carried out with the microwave oven in a fully assembled condition (outer
  • Sharp R-307KW | Service Manual - Page 15
    ohmmeter that will supply a forward bias voltage of more than 6.3 volts. R307KW [4] Procedure D: HIGH VOLTAGE CAPACITOR TEST 1. Disconnect the power supply cord, holes of the oven cavity, especially the cooling fan and air guide. 6. Reconnect all leads removed from components during testing. 7.
  • Sharp R-307KW | Service Manual - Page 16
    R307KW 2. Open the door and block it open. 3. Discharge high voltage capacitor. 4. Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (
  • Sharp R-307KW | Service Manual - Page 17
    R307KW If the monitor fuse is blown by improper switch operation, the monitor 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 troubleshooting
  • Sharp R-307KW | Service Manual - Page 18
    R307KW 7) Reconnect the power supply cord after the outer case is installed. 8) Run certain group of indicators do not light up. g) The figure of all digits flicker. 3) Other possible problems caused by defective control unit. a) Buzzer does not sound or continues to sound. b) Clock does not operate
  • Sharp R-307KW | Service Manual - Page 19
    RELAY TEST R307KW 1. Disconnect the relay coil with a D.C. voltmeter during the microwave cooking operation. DC. voltage indicated Defective relay. DC open. 3) Discharge high voltage capacitor. 4) Follow the troubleshooting guide given below for repair. STEPS OCCURRENCE CAUSE OR CORRECTION
  • Sharp R-307KW | Service Manual - Page 20
    R307KW 5) Make a visual inspection of the varistor. Check for burned damage and cord after the outer case is installed. 9) Run the oven and check all functions. 2. Follow the troubleshooting guide given below, if indicator does not light up after above check and repairs are finished. d a c
  • Sharp R-307KW | Service Manual - Page 21
    RC30H7KAWPTER 9. TOUCH CONTROL PANEL ASSerSvEicMe BMLanYual R307KW [1] OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units as shown in the touch control panel circuit. (1) Key Unit (2) Control
  • Sharp R-307KW | Service Manual - Page 22
    R307KW Pin No. 25 26-37 38-40 41 Signal COM3 SEG0-SEG11 SEG12-SEG14 P70 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
  • Sharp R-307KW | Service Manual - Page 23
    sound. OUT 64 P20 OUT Terminal not used. [3] SERVICING FOR TOUCH CONTROL PANEL Description 0.1 sec. A 2.0 sec. B R307KW H : GND L : -5V H : GND L 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
  • Sharp R-307KW | Service Manual - Page 24
    R307KW RC30H7KAWPTER 10. PRECAUTIONS FOR USINGSerLvEicAeDM-aFnRuaElE SOLDER [1] Employing lead-free solder The "Main PWB" of this model employs lead-free solder. This is indicated by the "LF" symbol printed on the PWB and in the service manual. The suffix letter indicates the alloy type of the
  • Sharp R-307KW | Service Manual - Page 25
    R307KW RC30H7KAWPTER 11. COMPONENT REPLACEMSEerNviTce AMaNnDual ADJUSTMENT PROCE- DURE [1] WARNINGS WARNING AGAINST HIGH VOLTAGE: Microwave microwave energy. Please follow the instructions . 2. Door hinge, support or latch hook is damaged 2. If the wave guide or oven cavity are not Sharp edge
  • Sharp R-307KW | Service Manual - Page 26
    R307KW [2] OUTER CASE REMOVAL To remove the outer case, procedure as follows. 1. Disconnect the all wire leads from magnetron. 5. Remove the one (1) screw holding the chassis support to the mag- netron. 6. Release the chassis support from the hole of the oven cavity front flange. 7. Remove the two
  • Sharp R-307KW | Service Manual - Page 27
    oven cavity top plate and the magnetron with two (2) screws. 3. Insert the end of the chassis support into the hole of the oven cavity front flange. R307KW 4. Hold the other end of the chassis support to the magnetron with the one (1) screw. 5. Reconnect the wire leads to the magnetron. Refer to
  • Sharp R-307KW | Service Manual - Page 28
    R307KW the corners have been snipped off bend corner areas flat. No sharp edges must be evident after removal of the turntable motor cover. shaft according to the following procedure. 2. Hold the center of the bracket which supports the shaft of the fan motor on the flat table. 3. Apply the screw
  • Sharp R-307KW | Service Manual - Page 29
    cord to the noise filter correctly, referring to the Pictorial Diagram. 4. Re-install outer case and check that the oven is operating properly. R307KW Power Supply Cord Screw Fuse Oven Cavity Back Plate Green Wire Noise Filter WHT RED L N Gray Wires Connect the wire lead which has the
  • Sharp R-307KW | Service Manual - Page 30
    R307KW 2. After adjustment, check the following. 1. In and out play of door remains chapter "Test Procedures".). 2) An approved microwave survey meter should be used to assure compliance with proper microwave radiation emission limitation standards. 3. After any service, make sure of the following:
  • Sharp R-307KW | Service Manual - Page 31
    Pin Upper Oven Hinge Upper Oven Hinge Slit choke of door panel Lower Oven Hinge Lower Oven Hinge Pin Choke Cover Figure C-6. Door Replacement R307KW 4. SEALER FILM 1. Put the adhesive tape on the backing film of the sealer film as shown in Fig. C-7 2. Tear the backing film by pulling the
  • Sharp R-307KW | Service Manual - Page 32
    GRY FAN MOTOR TURNTABLE MOTOR GRY GRY RED RED HIGH VOLTAGE COMPONENTS PNK BLK WHT (RED) MAGNETRON HIGH VOLTAGE CAPACITOR (WHT) (RED) H.V. RECTIFIER POWER TRANSFORMER R307KW RC30H7KAWPTER 12. CIRCUIT DIAGRAMS [1] Pictorial Diagram (Figure S-1) Service Manual
  • Sharp R-307KW | Service Manual - Page 33
    4 SOFTEN POWER LEVEL G8 1 COOK STOP CLEAR G9 7 DEFROST START G10 < KEY UNIT > C50 C51 C52 C53 C50-C53 330P/50V x 4 [2] Control Panel Circuit (Figure S-2) R307KW
  • Sharp R-307KW | Service Manual - Page 34
    R307KW [3] Printed Wiring Board (Figure S-3) Figure S-3. Printed Wiring Board 12 - 3
  • Sharp R-307KW | Service Manual - Page 35
    MODELS R-307KK R307KW [1] OVEN PARTS Parts marked "*" may cause undue microwave exposure. Parts marked " " are used in voltage more than 250V. CONTENTS PANEL PARTS [2] DOOR AND CONTROL „ INDEX DOOR PROTECTION SHEET SPADPA204WRE0 FOAM SHEET SPAKHA012WREZ (only for R-307KK) 6-6 INSTRUCTION BOOK
  • Sharp R-307KW | Service Manual - Page 36
    R307KW [1] OVEN PARTS 2-1 7-1 1-2 1-13 7-10 7-2 7-10 7-10 7-2 4-13 1-7 4-4 6-2 4-7 4-12 6-1 2-2 7-10 2-3 4-9 4-15 4-12 7-9 4-3 1-12 7-3 6-3 1-6 7-6 7-8 4-16 6-4 7-1 1-3 7-3 7-10 7-3 1-8 7-7 7-10 4-8 7-8 4-14 4-6 1-11 7-4 7-5 4-10 4-12 4-17 4-1 1-9 1-10 4-5 7-1 4-11 7-8 7-1
  • Sharp R-307KW | Service Manual - Page 37
    AF Cushion AB Cushion AE Cushion AE Cushion AE Cushion AN Chassis support AK Cushion AR Turntable support AS Turntable AE Monitor caution AF DHHS caution label AB Screw : 4mm AA Screw : 4mm x 8mm AB Screw : 4mm x 8mm [R-307KK] AA Screw : 4mm x 8mm [R-307KW] 3 R307KW
  • Sharp R-307KW | Service Manual - Page 38
    R307KW [2] DOOR AND CONTROL PANEL PARTS 5-7 5-2 5-1 5-3 5-4 5-8 5-8 5-6 5-5 3-2 3-2-2 3-2-1 3-7 3-5 3-1 3-6 6-5 3-4 6-6 3-3 4
  • Sharp R-307KW | Service Manual - Page 39
    [R-307KW] Button spring Rubber connector Liquid crystal display Screw : 3mm x 8mm Door panel Sealer film Door frame [R-307KK] Door frame [R-307KW] Door screen [R-307KK] Door screen [R-307KW] Latch head Spring Choke cover Screw: 4mm x 8mm Main wire harness Instruction book DESCRIPTION R307KW 5
  • Sharp R-307KW | Service Manual - Page 40
    R307KW „INDEX PARTS CODE [ D ] DPWB-A352DRKZ [ F ] FACCDA098WREZ FACCDA099WREZ FACCDA109WREZ FACCDA110WREZ -- AF AE AM AB AB AB AB AB AC AG AA AA AB COPYRIGHT © 2006 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in retrieval systems, or
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PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE EXPO-
SURE TO EXCESSIVE MICROWAVE ENERGY
BEFORE SERVICING
CHAPTER 1. WARNING TO SERVICE PERSONNEL
CHAPTER 2. MICROWAVE MEASUREMENT PRO-
CEDURE
CHAPTER 3. FOREWORD AND WARNING
CHAPTER 4. PRODUCT DESCRIPTION
CHAPTER 5. GENERAL INFORMATION
CHAPTER 6. OPERATION
CHAPTER 7. TROUBLESHOOTING GUIDE
CHAPTER 8. TEST PROCEDURES
CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY
CHAPTER 10. PRECAUTIONS FOR USING LEAD-
FREE SOLDER
CHAPTER 11. COMPONENT REPLACEMENT AND
ADJUSTMENT PROCEDURE
CHAPTER 12. CIRCUIT DIAGRAMS
Parts List
SERVICE MANUAL
R307KW
CONTENTS
SHARP CORPORATION
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
S0601R307KPW/
MICROWAVE OVEN
R-307KK
R-307KW
MODELS
In the interest of user-safety the oven should be restored to its origi-
nal 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 cur-
rent, contact with following parts may result in a severe,
possibly fatal, electrical shock. (High Voltage Capacitor, High
Voltage Power Transformer, Magnetron, High Voltage Rectifier
Assembly,
High Voltage Harness etc..)
R307KW