Sharp R-231NW Service Manual

Sharp R-231NW Manual

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  • Sharp R-231NW | Service Manual - Page 1
    MODEL R-231NW In the interests of user-safety the oven should be restored to its original condition and only parts identical to those speci?ed should be used. WARNING TO SERVICE DURING SERVICING TO AVOID EXPOSURE TO EXCESSIVE MICROWAVE ENERGY BEFORE SERVICING CHAPTER 7. TROUBLESHOOTING GUIDE CHAPTER
  • Sharp R-231NW | Service Manual - Page 2
    INSTRUCTIONS 5-1 [2] OVEN DIAGRAM 5-1 CHAPTER 6. OPERATION [1] DESCRIPTION OF OPERATING SE- QUENCE 6-1 [2] OVEN SCHENATIC 6-2 [3] DESCRIPTION AND FUNCTION OF COMPONENTS 6-3 CHAPTER 7. TROUBLESHOOTING GUIDE [1] TROUBLESHOOTING [14] L: RELAY TEST 8-6 [15] M: DEFROST TEST 8-6 [16 [3] SERVICING FOR
  • Sharp R-231NW | Service Manual - Page 3
    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
  • Sharp R-231NW | Service Manual - Page 4
    231NW CHAPTER 1. WARNING TO SERVICE the Service Manual carefully and follow all instructions. Don't Touch ! Danger High Voltage [1] Before Servicing 1. Disconnect chassis with the use of an insulated screwdriver. Whenever troubleshooting is performed the power supply must be disconnected. It may
  • Sharp R-231NW | Service Manual - Page 5
    2. MICROWAVE MEASUREMENT PROCEDURE R-231NW [1] Requirements: 1. Microwave instrument is operating normally as specified in its instruction booklet. Important: Survey instruments that comply with the requirement After servicing, record data on service invoice and microwave leakage report. 2 - 1
  • Sharp R-231NW | Service Manual - Page 6
    R-231NW CHAPTER 3. FOREWORD AND WARNING [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-230KK and R-230KW. It is recommended that service personnel carefully study the entire text
  • Sharp R-231NW | Service Manual - Page 7
    CHAPTER 4. PRODUCT DESCRIPTION [1] SPECIFICATIONS R-231NW ITEM Power Requirements Power Consumption Power Output Case Dimensions Cooking Cavity Dimensions (0.8 Cubic feet) DESCRIPTION 120 Volts 60 Hertz Single phase, 3 wire grounded 1170W / Approx.
  • Sharp R-231NW | Service Manual - Page 8
    231NW CHAPTER 5. GENERAL INFORMATION [1] GROUNDING INSTRUCTIONS the extension cord must be used, it should be a 3-wire, 15 amp. Plug or higher rated cord. Do not drape over a 2 11 10 3 7 7. Removable turntable support 9 Carefully place the turntable support in the center of the oven floor
  • Sharp R-231NW | Service Manual - Page 9
    2. TOUCH CONTROL PANEL R-231NW Palomitas de Maiz Descongelacion Nivel de Potencia Cronometro Reloj Detencion Cancelacion Comienzo Minuto Extra Function Rapida Derretir Suavizar Calentar RECALENTAR COCCION 1 Caserola 2 Sopa 3 Pizza 4 Bebida 5
  • Sharp R-231NW | Service Manual - Page 10
    R-231NW CHAPTER 6. OPERATION [1] DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. 1. OFF CONDITION Closing the door activates door sensing switch
  • Sharp R-231NW | Service Manual - Page 11
    L [2] OVEN SCHENATIC 1. Off Condition SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY FUSE 15A R-231NW THERMAL CUT-OUT (OVEN) or TEMPERATURE FUSE (OVEN) NOTE: " " indicates components with potentials above 250V N.O. COM. POWER TRANSFORMER LINE BYPASS CAPACITOR 0.
  • Sharp R-231NW | Service Manual - Page 12
    R-231NW [3] DESCRIPTION AND FUNCTION OF COMPONENTS 1. DOOR OPEN MECHANISM The door is opened by pushing the open button on the control panel, refer to the Figure D-1.
  • Sharp R-231NW | Service Manual - Page 13
    TROUBLESHOOTING GUIDE R-231NW 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
  • Sharp R-231NW | Service Manual - Page 14
    R-231NW CHAPTER 8. TEST PROCEDURES [1] Procedure A : MAGNETRON ASSEMBLY TEST 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open. 3. Discharge
  • Sharp R-231NW | Service Manual - Page 15
    R-231NW [4] Procedure D : HIGH VOLTAGE CAPACITOR TEST 1. Disconnect the power supply cord, and 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 outer case (cabinet).
  • Sharp R-231NW | Service Manual - Page 16
    R-231NW [8] Procedure F : PRIMARY INTERLOCK SYSTEM TEST 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open. 3. Discharge high voltage
  • Sharp R-231NW | Service Manual - Page 17
    R-231NW [10] Procedure H : BLOWN The monitor fuse and monitor switch assembly is comprised of a 15 ampere fuse and switch. 5. Reconnect all leads removed from components service manual, the touch control panel assembly is divided into two units, Control Unit and Key Unit, and troubleshooting by
  • Sharp R-231NW | Service Manual - Page 18
    R-231NW If the key unit is defective. 1) Disconnect the power supply cord A 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 properly.
  • Sharp R-231NW | Service Manual - Page 19
    231NW outer case is installed. 15.Run the oven and check all functions. [15] Procedure M : DEFROST BOARD TEST To protect the electronic circuits, this model is provided with a fine foil pattern added voltage capacitor. 4) Follow the troubleshooting guide given below for repair. STEPS OCCURRENCE
  • Sharp R-231NW | Service Manual - Page 20
    R-231NW 5) Make a visual inspection of the varistor. Check for burned damage and case is installed. d 9) Run the oven and check all functions. a c b 2. Follow the troubleshooting guide given below, if indicator does not light up after above check and repairs are finished. 1) Disconnect
  • Sharp R-231NW | Service Manual - Page 21
    R-231NW CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY [1] OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units as shown in the touch control
  • Sharp R-231NW | Service Manual - Page 22
    HIGH VOLTAGE TRANSFORMER OF THE MICROWAVE OVEN IS STILL LIVE DURING SERVICING AND PRESENTS A HAZARD. Therefore, when checking the performance of case is installed. 6) Run the oven and check all functions. R-231NW a) On some models, the power supply cord between the touch control panel and the oven
  • Sharp R-231NW | Service Manual - Page 23
    R-231NW CHAPTER 10. PRECAUTIONS FOR USING LEAD-FREE 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 solder. Example:
  • Sharp R-231NW | Service Manual - Page 24
    231NW energy. Please follow the instructions below before operating the does not close firmly. 2. Door hinge, support or latch hook is damaged. 3. The door the RF gasket (Magnetron). 2. If the wave guide or oven cavity are not intact. 3. If transformer and Oven cavity. 3) Sharp edge: Bottom plate, Oven
  • Sharp R-231NW | Service Manual - Page 25
    R-231NW [2] OUTER CASE REMOVAL To remove the outer case, procedure as follows. 1. Disconnect the power supply cord. 2. Open the oven door and block it open. 3. Remove
  • Sharp R-231NW | Service Manual - Page 26
    R-231NW [6] POSITIVE LOCK CONNECTOR (NO-CASE TYPE) REMOVAL 1. Disconnect the power supply cord, and remove outer case. 2. Open the door and block it open. 3. Discharge high
  • Sharp R-231NW | Service Manual - Page 27
    R-231NW [9] POWER SUPPLY CORD REPLACEMENT Disconnect the power supply cord. 2. Remove turntable and turntable support from oven cavity. 3. Lay the oven on it's backside the corners have been snipped off bend corner areas flat. No sharp edges must be evident after removal of the turntable motor cover.
  • Sharp R-231NW | Service Manual - Page 28
    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 blade with a small, light weight, ball peen hammer or rubber mallet. R-231NW CAUTION: DO NOT HIT THE FAN BLADE STRONGLY WHEN INSTALLED BECAUSE THE BRACKET
  • Sharp R-231NW | Service Manual - Page 29
    R-231NW 2. frame and latch head. 14. Now, latch head and latch spring are free. 15. Remove door screen from door frame. 16. Now, door screen is free. Re-install choke cover to door panel by pushing. NOTE: After any service to the door; 1) Make sure that door sensing switch, secondary interlock
  • Sharp R-231NW | Service Manual - Page 30
    Pin Upper Oven Hinge Upper Oven Hinge Slit choke of door panel Lower Oven Hinge Lower Oven Hinge Pin Figure C-7. Door Replacement Choke Cover R-231NW 4. SEALER FILM 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
  • Sharp R-231NW | Service Manual - Page 31
    MOTOR WHT ORG HIGH VOLTAGE COMPONENTS TURNTABLE MOTOR GRY GRY RED RED RED GRY BLU (RED) MAGNETRON HIGH VOLTAGE CAPACITOR (WHT) (RED) H.V. RECTIFIER POWER TRANSFORMER R-231NW CHAPTER 12. CIRCUIT DIAGRAMS [1] Pictorial Diagram (Figure S-1)
  • Sharp R-231NW | Service Manual - Page 32
    [2] Control Panel Circuit (Figure S-2) R-231NW Figure S-2 Control Panel Circuit 12 - 2
  • Sharp R-231NW | Service Manual - Page 33
    R-231NW [3] Printed Wiring Board (Figure S-3) Figure S-3. Printed Wiring Board 12 - 3
  • Sharp R-231NW | Service Manual - Page 34
    To have your order filled promptly and correctly, please MODEL R-231NW furnish the following information. 1. MODEL NUMBER 2. REF. NO. 3. PART NO. 4. SPADPA580WRE0 6-5 INSTRUCTION BOOK 6-1 TURNTABLE TRAY MICROWAVE OVEN FOAMSHEET for R-231NW SPAKHA014WREZ 6-2 TURNTABLE SUPPORT TOP PAD ASSEMBLY
  • Sharp R-231NW | Service Manual - Page 35
    R-231NW [1] OVEN PARTS 7-8 7-8 2-1 7-8 7-8 4-5 4-8 6-1 6-2 7-8 4-11 4-6 7-8 1-10 7-8 7-6 1-8 4-9 7-1 1-3 7-3 6-4 7-11 1-13 7-1 7-11 7-6 1-12 7-6 7-2 7-7 4-7 7-7 4-14 4-4 7-10 7-1 4-10 4-17 7-4 4-1 4-13 7-1 1-9 1-11 2-2 1-7 1-1 1-2 1-1 4-2 1-4 1-6 4-3 7-3 4-15 4-12 1-5 7-1
  • Sharp R-231NW | Service Manual - Page 36
    R-231NW PARTS LIST NO. PARTS CODE DESCRIPTION Q'TY PRICE RANK [1] OVEN PARTS ELECTRONIC PDUC-A908WRWZ2 Fan duct 1 AF 4-5 FOVN-A551WRTZ Oven cavity 1 BG 4-6 LANGFA267WRPZ2 Chassis support 1 AF 4-7 MLEVPA241WRFZ Switch lever 1 AG 4-8 PCOVPA419WREZ Waveguide cover 1 AG 4-9 PDUC-
  • Sharp R-231NW | Service Manual - Page 37
    R-231NW [2] DOOR AND CONTROL PANEL PARTS 5-7 5-6 5-1 5-2 5-3 3-1 3-1-2 3-1-1 5-5 5-4 3-8 3-7 3-5 6-5 3-4 3-6 6-6 3-3 3-2 4
  • Sharp R-231NW | Service Manual - Page 38
    LSTPPA205WRFZ Latch head 5-5 MSPRTA187WRE0 Spring 5-6 PSHEPA782WREZ Sealer film 5-7 GCOVHA424WRFZ Choke cover MISCELLANEOUS 6-5 TINSEB205WRRZ Instruction book 6-6 FW-VZC044WREZ Main wire harness R-231NW Q'TY PRICE RANK 1 1 1 AQ 1 AG 1 AB 1 BH 1 AE 1 AQ 2 AB 1 AE 1 BB 1 AW
  • Sharp R-231NW | Service Manual - Page 39
    5-4 LSTPPA205WRFZ Latch head 5-5 MSPRTA187WRE0 Spring 5-6 PSHEPA782WREZ Sealer ?lm 5-7 GCOVHA424WRFZ Choke cover MISCELLANEOUS 6-5 TINSEB205WRRZ Instruction book 6-6 FW-VZC044WREZ Main wire harness R-231NW Q'TY PRICE RANK 1 AX 1 AN 1 AQ 1 AG 1 AB 1 BH 1 AE 1 AQ 2 AB 1 AE
  • Sharp R-231NW | Service Manual - Page 40
    5-4 LSTPPA205WRFZ Latch head 5-5 MSPRTA187WRE0 Spring 5-6 PSHEPA782WREZ Sealer ?lm 5-7 GCOVHA424WRFZ Choke cover MISCELLANEOUS 6-5 TINSEB205WRRZ Instruction book 6-6 FW-VZC044WREZ Main wire harness R-231NW Q'TY PRICE RANK 1 AX 1 AN 1 AQ 1 AG 1 AB 1 BH 1 AE 1 AQ 2 AB 1 AE
  • Sharp R-231NW | Service Manual - Page 41
    R-231NW ■ INDEX PARTS CODE [ D ] DPWBFC479WRUZ [ F ] FACCDA107WREZ FACCDA108WREZ FDORFA397WRTZ FFS-BA026WRKZ FH-DZA114WRKZ BF BF BH -- AF AE AM AA AA AC AA AA AA AA COPYRIGHT© 2009 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in retrieval systems,
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R-231NW
6
Pan
COCCION
RECALENTAR
1
Caserola
2
Sopa
3
Pizza
4
Bebida
5
Plato Principal
Derretir
Suavizar
Calentar
Function Rapida
Cronometro
Reloj
Nivel de
Potencia
Comienzo
Detencion
Cancelacion
1
Papa Asada
2
Verdura Fresca
3
Verdura Congelada
4
Entradas Congeladas
Minuto Extra
Descongelacion
Palomitas de Maiz
CONTENTS
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID EXPOSURE 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
S3911R231NPAL
MICROWAVE OVEN
R-231NW
In the interests of user-safety the oven should be restored
to its original condition and only parts identical to those
speci?
ed should be used.
WARNING TO SERVICE PERSONNEL: Microwave ovens
contain circuitry capable of producing very high voltage
and current, contact with following parts may result in a se-
vere, possibly fatal, electrical shock. (High Voltage Capaci-
tor,
High Voltage Power Transformer, Magnetron, High
Voltage Rectifier Assembly, High Voltage Harness etc..)
SERVICE MANUAL
This document has been published to be used for after sales service only.
The contents are subject to change without notice.
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 Guide
MODEL