1. Manuals
  2. Brands
  3. Sharp Manuals
  4. Microwave Oven
  5. R-8000G
  6. Service manual

Sharp R-8000G Service Manual

Hide thumbs Also See for R-8000G:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Operating Manual
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICE 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 ..................................................................................................................................... 13
TEST PROCEDURE ..................................................................................................................................................... 15
TOUCH CONTROL PANEL .......................................................................................................................................... 25
PRECAUTIONS FOR USING LEAD-FREE SOLDER .................................................................................................. 29
PROCEDURE FOR CHECKING/ SETTING TOTAL OPERATION TIME .................................................................... 30
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ......................................................................... 31
SERVICE MAINTENANCE CLEANING ....................................................................................................................... 39
PICTORIAL DIAGRAM ................................................................................................................................................. 40
POWER UNIT, CPU UNIT AND CONTROL UNIT CIRCUIT ........................................................................................ 41
GRID ASSIGNMENT OF FLUORESENT DISPLAY TUBE .......................................................................................... 42
PRINTED WIRING BOARD .......................................................................................................................................... 42
PARTS LIST ................................................................................................................................................................. 44
PACKING AND ACCESSORIES .................................................................................................................................. 47
SHARP CORPORATION
SERVICE MANUAL
HIGH SPEED CONVECTION
MODEL
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 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 Rectifier Assembly, High Voltage Harness
etc..)

TABLE OF CONTENTS

This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
COMMERCIAL
MICROWAVE OVEN
R-8000G
R-8000G
SY313R8000GP/
Page

Advertisement

Table of Contents
loading

Related Manuals for Sharp R-8000G

Summary of Contents for Sharp R-8000G

  • Page 1: Table Of Contents

    R-8000G SERVICE MANUAL SY313R8000GP/ COMMERCIAL HIGH SPEED CONVECTION MICROWAVE OVEN R-8000G MODEL 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...

  • Page 2: 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.

  • Page 3: Warning To Service Personnel

    R-8000G WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of pro- ducing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock. (Example) High Voltage Capacitor, High Voltage Power Trans- former, Magnetron, High Voltage Rectifier Assem- bly, High Voltage Harness etc..

  • Page 4: Microwave Measurement Procedure

    R-8000G 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/cm at any point 5cm or more from the external surface of the oven, measured prior to acquisition...

  • Page 5: Foreword And Warning

    HIGH SPEED CONVECTION MICROWAVE OVEN GENERAL INFORMATION R-8000G FOREWORD OPERATION This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP COOMERCIAL HIGH SPEED CONVECTION MICROWAVE OVEN, R-8000G. TROUBLESHOOTING GUIDE AND TEST PROCEDURE 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.

  • Page 6: Product Specifications

    R-8000G SPECIFICATION ITEM DESCRIPTION Power Requirements 208 Volts 9.0 Amperes (Microwave) / 14.0 Amperes (Convection)/ 16.0 Amperes (Speed Cooking) 60 Hertz / Single phase, 3 wire grounded Power Output 1000 watts (IEC Test Procedure) Operating frequency of 2450MHz Top Heater Power Output...

  • Page 7: Oven Diagram

    R-8000G Extension Cord Receptacle Box Cover 3-Pronged NEMA plug If it is necessary to use an extension cord, use only a 3-wire extension cord that has a 3-blade (6-20P) grounding plug and a 3-slot receptacle that will accept the plug on the high speed oven. The marked rating of the extension cord should be AC 208 volt, 20 amp.

  • Page 8: Operation

    R-8000G OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven (RY2) and the secondary interlock switch, causing the monitor operation. fuse to blow. OFF CONDITION POWER LEVEL P-0 TO P-90 COOKING Closing the door activates the door sensing switch, secondary When Variable Cooking Power is programmed, the 208 volts A.C.
  • Page 9 R-8000G AUTOMATIC COOKING 7. The solid-state relays are energized (if the cavity temperature is lower than the selected temperature) and the main supply Automatic cooking will automatically compute the oven tempera- voltage is applied to the heating elements to return to the ture, microwave power and cooking time.

  • Page 10: Schematic Diagram

    R-8000G SCHEMATIC DIAGRAM SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. NOTE: " " indicates components with potential above 250V. APPEARS ON DISPLAY. NOISE FILTER T/C TRANSFORMER MAGNETRON MONITOR TEMPERATURE FUSE FUSE 150˚C FUSE F10A TOP HEATER SIDE HEATER THERMAL THERMAL CUT-OUT 170˚C...
  • Page 11 R-8000G SCHEMATIC (CONVECTION) SCHEMATIC (SPEED BAKE) NOTE: CONDITION OF OVEN NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 1. DOOR CLOSED. 2. "SELECTA PROGRAM" PAD TOUCHED 3 TIMES. 2. "SELECTA PROGRAM" PAD TOUCHED 8 TIMES. 3. "SET" PAD TOUCHED. 3. "SET" PAD TOUCHED.
  • Page 12 R-8000G SCHEMATIC (HIGH SPEED GRILL WITH MICRO) SCHEMATIC (HIGH SPEED GRILL WITH MICRO) NOTE: CONDITION OF OVEN NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 1. DOOR CLOSED. 2. "SELECTA PROGRAM" PAD TOUCHED 5 TIMES. 2. "SELECTA PROGRAM" PAD TOUCHED 7 TIMES.

  • Page 13: Description And Function Of Components

    R-8000G DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE TEST THE DOOR SENSING SWITCH, PRIMARY The door is opened by pulling the door handle down and forward, INTERLOCK RELAY, SECONDARY INTERLOCK referring to the figure D-1. When the door handle is pulled down, the latch heads are moved upward.
  • Page 14 R-8000G The heated air is kept in the oven and force-circulated and Top heating reheated by the top heating element. element unit SIDE HEATING ELEMENT The side heating element is located at the left side of the oven cavity. It is intended to heat air driven by the convection fan. The heated air is kept in the oven and force-circulated and reheated by the top heating element.

  • Page 15: Troubleshooting Guide

    R-8000G 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 require that a specific test be performed.
  • Page 16 R-8000G RE: Replace / CK: Check TEST PROCEDURE A B C D E E F G H J K M O S T U V V V V V X Y W W RE RERE CKCK CKCK U I P...

  • Page 17: Test Procedure

    R-8000G TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MAGNETRON ASSEMBLY TEST 1. Disconnect the power supply cord. 2. Remove the outer case cabinet, referring to “OUTER CASE CABINET REMOVAL”. 3. Open the oven door and block it open. 4. Discharge the high voltage capacitor.
  • Page 18 R-8000G TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER transformer because the primary coil (thermostat) has opened. An open primary coil (thermostat) indicates overheating of the power transformer. Check for restricted air flow to the power transformer, especially the fan motor (power transformer side).
  • Page 19 R-8000G TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER PRIMARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH 1. Disconnect the power supply cord. 2. Remove the outer case cabinet, referring to "OUTER CASE CABINET REMOVAL". 3. Open the door and block it open.
  • Page 20 R-8000G TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER BLOWN MONITOR FUSE 1. Disconnect the power supply cord. 2. Remove the outer case cabinet, referring to "OUTER CASE CABINET REMOVAL". 3. Open the door and block it open. 4. Discharge high voltage capacitor.
  • Page 21 R-8000G TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER temperature of the thermal cut-out reaches approximately 338˚F(170˚C). The thermal cut-out resets automatically at approximately 311˚F(155˚C). If thermal cut-out has opened under normal condition, replace the same item as in the parts list.
  • Page 22 R-8000G TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER b. Disconnect wire leads from the heating element and measure the insulation resistance with 500V - 100MΩ insulation resistance meter. The insulation resistance between heating element terminal and cavity should be more than 0.5MΩ.
  • Page 23 R-8000G TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 8. Reconnect all leads removed from components 3-pin during testing. Connector Main Coil 9. Reinstall the outer case (cabinet) and the back plate. Thermal 100Ω 10. Reconnect the power supply cord after the outer Cut-out case and the back plate are installed.
  • Page 24 R-8000G TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 1. Tact switches on the CPU unit or the control unit (switch unit) 1) Re-install the outer case (cabinet). 2) Reconnect the power supply cord after the outer case is installed. 3) Run the oven and check all functions.
  • Page 25 R-8000G TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 9. Replace the CPU unit or the control unit that has any defective tact switches. 10. Assemble the control panel and reinstall it to the CN-J <CONTROL UNIT (SWITCH UNIT)> WH-A S10B-PH SW1-10 oven.
  • Page 26 R-8000G TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER EXPRESS DEFROST TEST WARNING : The oven should be fully assembled before following procedure. (1) Place one cup of water in the center of the turntable tray in the oven cavity. (2) Close the door, touch the SELECTA PROGRAM pad twice. And touch the SET pad.

  • Page 27: Touch Control Panel

    R-8000G TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units as shown 5) Buzzer Circuit in the touch control panel circuit. The buzzer is responds to signals from the LSI to emit noticing sounds (tact switch touch sound and completion sound).
  • Page 28 R-8000G Pin No. Signal Description AN15 Primary input voltage watching terminal. The LSI is watching the primary input voltage through this terminal. 8-10 AN14-AN12 Input terminal to change the specification according to the model. AN11 Temperature measurement input: OVEN THERMISTOR.
  • Page 29 R-8000G Pin No. Signal Description Turminal not used. Jet motor driving signal. During To turn on and off shut-off relay(RY3). “L”level during jet Jet motor driving motor driving “H” level otherwise Control signal to turn over the rotatory direction of the jet motor.
  • Page 30 R-8000G Memory Processor (IC-2) Memory processor is a 16K-bit, serial memory, enabling CMOS to be erased/written electrically. This memory is constructed with 2048 registers x 8bits, enabling individual access, read and write operations to be performed. Details of input/output signal for IC2 are as shown in the following diagram.

  • Page 31: Precautions For Using Lead-Free Solder

    R-8000G (on PWB) of the touch control panel with a jumper, which 1) Soldering iron: 60W activates an operational state that is equivalent to the oven (It is recommended to use a soldering iron with a grounding door being closed. As for the sensor-related controls of the terminal.)

  • Page 32: Procedure For Checking/ Setting Total Operation Time

    R-8000G PROCEDURE FOR CHECKING/ SETTING TOTAL OPERATION TIME This oven can display each total operation time (hours) of the top Procedure for setting the total operation time (e.g. 1000 heating element, the side heating element and the magnetron. hours) of the top heating element.

  • Page 33: Component Replacement And Adjustment Procedure

    4. If the outer case (cabinet) is not fitted. WARNING FOR WIRING To prevent an electric shock, take the following precautions. 3) Sharp edge: 1. Before wiring, Bottom plate, Oven cavity, Waveguide flange, Chassis 1) Disconnect the power supply cord.

  • Page 34: Power Supply Cord Replacement

    R-8000G 5. Pull the wire leads from the oven lamp socket by pushing the Oven lamp socket terminal hole of the oven lamp socket with the flat type small screw driver. 6. Tear the cushion from the light mounting plate.

  • Page 35: Power Transformer Removal

    R-8000G BACK PLATE REMOVAL 7. Remove the two (2) screws holding the back plate to the 1. Disconnect the power supply cord. 2. Remove the outer case cabinet, referring to “OUTER CASE exhaust duct. CABINET REMOVAL”. 8. Remove the three (3) screws holding the back plate to the bottom plate.
  • Page 36 R-8000G 9. Remove the three (3) screws holding the fan motor to the fan 6. Disconnect the wire leads from the fan motor. motor mounting angle. 7. Disconnect the connector of the main wire harness from the 10. Now, the fan motor is free.

  • Page 37: Turntable Motor Removal

    9. Now, the top heating element is free. TURNTABLE MOTOR REMOVAL 1. Disconnect the power supply cord. flat. No sharp edges must be evident after removal of the 2. Wait for 60 seconds to discharge the high voltage capacitor. turntable motor.

  • Page 38: Door Replacement And Adjustment

    R-8000G Reinstallation 2. Hold the latch hook (right or left) to the oven cavity front plate 1. Reinstall the switch in its place. The door sensing switch is in the with the one (1) screw. lower position of the latch hook right. The 3rd. latch switch is in 3.

  • Page 39: Door Disassembly

    R-8000G Door adjustment Door cam left When removing and/or loosening the oven hinges such as in door replacement, the following adjustment criteria are taken. Door spring Door adjustment is performed with the door properly installed and closed and while the oven hinges are loose.
  • Page 40 R-8000G FRONT DOOR GLASS Choke Cover 28. Remove each two (2) screws holding the two glass mounting Door Panel angles A to the door frame. Assembly 29. Remove the two (2) glass mounting angles A from the door frame. 30. To release the two (2) tabs holding the lower end of the front door glass, slide the front door glass upward.

  • Page 41: Service Maintenance Cleaning

    R-8000G SERVICE MAINTENANCE CLEANING It is recommended to schedule maintenance cleaning for the following portions 12 months or more often if heavy grease-laden foods are cooked very frequently. Portions to be cleaned: 1) Inside surface of Exhaust duct 2) Inside surface of Heater duct left...

  • Page 42: Pictorial Diagram

    R-8000G...

  • Page 43: Power Unit, Cpu Unit And Control Unit Circuit

    R-8000G...

  • Page 44: Grid Assignment Of Fluoresent Display Tube

    R-8000G col1 col1 col2 col2 [ 1G - 10G ] Figure S-3. Grid Assignment of Fluoresent Display Tube Figure S-4. Printed Wiring Board of Power Unit...
  • Page 45 R-8000G Figure S-5(a). Printed Wiring Board of CPU Unit (Component side) Figure S-5(b). Printed Wiring Board of CPU Unit (Solder side) Figure S-6. Printed Wiring Board of Control Unit (Switch Unit)

  • Page 46: Parts List

    R-8000G PARTS LIST ∆ Note: The parts marked " " may cause undue microwave exposure. The parts marked "*" are used in voltage more than 250V. REF. NO. PART NO. DESCRIPTION Q'TY CODE ELECTRICAL PARTS 1- 1 QSW-MA085WRE0 Secondary interlock/3rd. Latch/door sensing switches...

  • Page 47: Door Parts

    R-8000G REF. NO. PART NO. DESCRIPTION Q'TY CODE 4-15 FDUC-A381WRWZ Exhaust duct 4-16 FFANMA016WRKZ Convection fan assembly 4-17 LANGFA243WRPZ Convection motor mounting angle 4-18 PDUC-A825WRPZ Convection duct 4-19 PFPF-A229WREZ Thermal insulator back 4-20 PREFHA072WRWZ Thermal cover back 4-21 PSKR-A388WRWZ Divide plate A...
  • Page 48 R-8000G REF. NO. PART NO. DESCRIPTION Q'TY CODE 5- 3 LHLD-A258WRFZ Handle holder R 5- 4 LHLD-A259WRFZ Handle holder L 5- 5 PCUSGA588WRPZ Cushion ∆ 5- 6 GCOVHA439WRFZ Choke cover ∆ 5- 7 GWAKPA924WRFZ Door frame 5- 8 HDECAA230WRPZ Stainless cover...

  • Page 49: Packing And Accessories

    1. MODEL NUMBER 3. PART NO. 2. REF. 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. PACKING AND ACCESSORIES CAUTION SHEET...
  • Page 50 R-8000G...
  • Page 51 R-8000G MISCELLANEOUS POSITION OF PURSE LOCK Harness 6-18 Purse lock LL assembly Main wire harness Main wire harness 1-23 Touch control transformer Power unit 6-18 Purse lock LL 3-10 CONTROL PANEL PARTS Actual wire harness may be different than illustration.
  • Page 52 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, without prior written permission of the publisher. '04 SHARP CORP. (1S1.700E) Printed in U.S.A...

Table of Contents