R-8000G SERVICE MANUAL SY313R8000GP/ COMMERCIAL HIGH SPEED CONVECTION MICROWAVE OVEN MODEL R-8000G 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.
R-8000G PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY (a) Do not operate or allow the oven to be operated with the door open.
R-8000G 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. (Example) High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. Read the Service Manual carefully and follow all instructions. Don't Touch ! Danger High Voltage When the testing is completed, 1.
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/cm2 at any point 5cm or more from the external surface of the oven, measured prior to acquisition by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2 at any point 5cm or more from the external surface of the oven.
R-8000G SERVICE MANUAL PRODUCT DESCRIPTION COMMERCIAL HIGH SPEED CONVECTION MICROWAVE OVEN GENERAL INFORMATION R-8000G FOREWORD 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. 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.
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 1500 Watts Side Heater Power Output 1200 Watts Case Dimensions Width 21-5/8" Cooking Cavity Dimensions (1.
R-8000G Extension Cord Receptacle Box Cover If it is necessary to use an extension cord, use only a 3-wire extension cord that has a 3-blade 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. or more. Be careful not to drape the cord over the countertop or table where it can be pulled on by children or tripped over accidentally.
R-8000G OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. (RY2) and the secondary interlock switch, causing the monitor fuse to blow. OFF CONDITION POWER LEVEL P-0 TO P-90 COOKING Closing the door activates the door sensing switch, secondary interlock switch and 3rd. latch switch. (In this condition, the monitor switch contacts are opened.) When oven is plugged in, 208 volts A.C. 60 Hz is supplied to the control unit. (Figure O-1).
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 voltage is applied to the heating elements to return to the selected cooking temperature. 8. Upon completion of the cooking time, the audible signal will sound, and oven lamp, turntable motor, cooling fan motor and jet motor are de-energized.
R-8000G SCHEMATIC DIAGRAM SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. . 2. APPEARS ON DISPLAY. NOTE: " " indicates components with potential above 250V. NOISE FILTER BLK H.V. RECTIFIER MAGNETRON CAPACITOR 1µ AC 2300V CAPACITOR 1µ AC 2300V H.V. RECTIFIER TTM OL TURNTABLE MOTOR OVEN LAMP N.O. JET MOTOR CAPACITOR SOLID-STATE RELAY COM. FM JM FM THERMISTOR E3 D3 FAN MOTOR D5 DOOR SENSING SWITCH B4 D1 D7 JET MOTOR LINE BYPASS CAPACITOR 0.
R-8000G SCHEMATIC (CONVECTION) NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. "SELECTA PROGRAM" PAD TOUCHED 3 TIMES. 3. "SET" PAD TOUCHED. 4. DESIRED TEMPERATURE SELECTED WITH "SET" PAD. 5. COOKING TIME PROGRAMMED. 6. "START" PAD TOUCHED. SCHEMATIC (SPEED BAKE) NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. "SELECTA PROGRAM" PAD TOUCHED 8 TIMES. 3. "SET" PAD TOUCHED. 4. DESIRED TEMPERATURE SELECTED WITH "SET" PAD. 5. COOKING TIME PROGRAMMED. 6. "START" PAD TOUCHED. NOISE FILTER BLK H.V.
R-8000G SCHEMATIC (HIGH SPEED GRILL WITH MICRO) NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. "SELECTA PROGRAM" PAD TOUCHED 5 TIMES. 3. "SET" PAD TOUCHED. 4. COOKING TIME PROGRAMMED. 5. POWER LEVEL PROGRAMMED WITH "SELECTA POWER" PAD. 6. "START" PAD TOUCHED. SCHEMATIC (HIGH SPEED GRILL WITH MICRO) NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. "SELECTA PROGRAM" PAD TOUCHED 7 TIMES. 3. "SET" PAD TOUCHED. 4. COOKING TIME PROGRAMMED. 5. POWER LEVEL PROGRAMMED WITH "SELECTA POWER" PAD. 6. "START" PAD TOUCHED.
R-8000G DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE TEST THE DOOR SENSING SWITCH, PRIMARY INTERLOCK RELAY, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. (REFER TO CHAPTER “TEST PROCEDURE”). The door is opened by pulling the door handle down and forward, referring to the figure D-1. When the door handle is pulled down, the latch heads are moved upward.
R-8000G The heated air is kept in the oven and force-circulated and reheated by the top heating element. Top heating 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.
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. These tests are given a procedure letter which will be found in the "Test Procedure "section.
R-8000G RE: Replace / CK: Check POSSIBLE CASE AND DEFECTIVE PARTS CONDITION PROBLEM 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 P CKCK CKCK L N RE U I P CK RE MAGNETRON POWER TRANSFORMER H.V. RECTIFIER ASSEMBLY HIGH VOLTAGE CAPACITOR SECONDARY INTERLOCK SWITCH 3RD.
R-8000G TEST PROCEDURES PROCEDURE LETTER A COMPONENT TEST MAGNETRON ASSEMBLY TEST 1. 2. 3. 4. 5. 6. Disconnect the power supply cord. Remove the outer case cabinet, referring to “OUTER CASE CABINET REMOVAL”. Open the oven door and block it open. Discharge the high voltage capacitor. Remove the back plate from the oven, referring to “BACK PLATE REMOVAL”. To test for an open filament, isolate the magnetron from the high voltage circuit.
R-8000G TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 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). 8. Reconnect all leads removed from components during testing. 9. Reinstall the outer case (cabinet) and the back plate. 10.
R-8000G TEST PROCEDURES PROCEDURE LETTER F COMPONENT TEST PRIMARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH 1. 2. 3. 4. 5. 6. 7. 8. 9. Disconnect the power supply cord. Remove the outer case cabinet, referring to "OUTER CASE CABINET REMOVAL". Open the door and block it open. Discharge high voltage capacitor. Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal of the switch.
R-8000G TEST PROCEDURES PROCEDURE LETTER H COMPONENT TEST BLOWN MONITOR FUSE 1. 2. 3. 4. 5. Disconnect the power supply cord. Remove the outer case cabinet, referring to "OUTER CASE CABINET REMOVAL". Open the door and block it open. Discharge high voltage capacitor. If the monitor fuse is blown when the door is opened, check the RY1, primary interlock relay (RY2), secondary interlock switch and monitor switch according to the "TEST PROCEDURE" for those switches before replacing the blown monitor fuse.
R-8000G TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 6. 7. 8. 9. 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. An open thermal cut-out indicates overheating of the top heating element unit.
R-8000G TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 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. 6. If the meter does not indicate above resistance, replace the top heating element. 7. Reconnect all leads removed from components during testing. 8. Reinstall the outer case (cabinet). 9.
R-8000G TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 8. Reconnect all leads removed from components during testing. 9. Reinstall the outer case (cabinet) and the back plate. 10. Reconnect the power supply cord after the outer case and the back plate are installed. 11. Run the oven and check all functions.
R-8000G TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 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. The following symptoms indicate a defective tact switch. a) When touching the pads, a certain pad produces no signal at all. b) When touching a number pad, two figures or more are displayed.
R-8000G TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST WH-A CN-J SW11-23 10Pin S10B-PH R11 SP1 R10 3.3K 1/4W J1 1.5K 1/4W 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 oven. 11. Reconnect all leads removed from components during testing. 12. Reinstall the outer case cabinet. 13. Reconnect the power supply cord after the outer case is installed. 14.
R-8000G TEST PROCEDURES PROCEDURE LETTER X COMPONENT TEST 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. (3) Enter weight by touching the number pad 3. (Example: 0.3 lbs steak) (4) Touch the START pad. (5) The oven is in Express Defrost cooking condition. (6) The oven will operate as follows.
R-8000G TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units as shown in the touch control panel circuit. 5) Buzzer Circuit The buzzer is responds to signals from the LSI to emit noticing sounds (tact switch touch sound and completion sound). (1) Tact switch circuit on the CPU unit and the control unit (switch unit). (2) Control Unit (The control unit consists of Power unit and CPU unit.
R-8000G Pin No. 7 8-10 Signal AN15 I/O IN Description Primary input voltage watching terminal. The LSI is watching the primary input voltage through this terminal. AN14-AN12 IN Input terminal to change the specification according to the model. 11 AN11 IN Temperature measurement input: OVEN THERMISTOR. By inputting DC voltage corresponding to the temperature detected by the thermistor, this input is converted into temperature by the A/D converter built into the LSI.
R-8000G Pin No. Signal I/O Description 28 P74 OUT Turminal not used. 29 P73 OUT Jet motor driving signal. To turn on and off shut-off relay(RY3). “L”level during jet motor driving “H” level otherwise 30 P72 OUT 31 P71 IN During Jet motor driving ON OFF H. GND L Control signal to turn over the rotatory direction of the jet motor. Signal to synchronize LSI with commercial power source frequency. This is the basic timing for all real time processing of LSI. H : GND L (-5V) 16.7 msec.
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. TOP VIEW A0 1 8 VCC A1 2 7 WP A2 3 6 SCL VSS 4 5 SDA Figure T-3 Relation between Pin Nos, and Signals Pin No.
R-8000G 1) Soldering iron: 60W (It is recommended to use a soldering iron with a grounding terminal.) 2) Oscilloscope: Single beam, frequency range: DC-10MHz type or more advanced model. 3) Others: Hand tools (on PWB) of the touch control panel with a jumper, which activates an operational state that is equivalent to the oven door being closed.
R-8000G PROCEDURE FOR CHECKING/ SETTING TOTAL OPERATION TIME This oven can display each total operation time (hours) of the top heating element, the side heating element and the magnetron. Procedure for setting the total operation time (e.g. 1000 hours) of the top heating element. Procedure for checking the total operation time (e.g. 1234 hours) of the top heating element.
R-8000G COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 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 Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before operating the oven. 1.
R-8000G 5. Pull the wire leads from the oven lamp socket by pushing the terminal hole of the oven lamp socket with the flat type small screw driver. 6. Tear the cushion from the light mounting plate. 7. Bend the tab of the light mounting plate holding the oven. 8. Pull out the oven lamp socket. 9. Remove the oven lamp from the oven lamp socket. 10. Now, the oven lamp socket is free. Oven lamp socket Terminal Wire lead Terminal hole Flat type small screw driver Figure C-1.
R-8000G BACK PLATE REMOVAL 7. Remove the two (2) screws holding the back plate to the exhaust duct. 8. Remove the three (3) screws holding the back plate to the bottom plate. 9. Remove the two (2) screws holding the right and left chassis supports to the back plate. 10. Release the tabs of the chassis supports from the back plate. 11. Now, the back plate (with the power supply cord) is free. 1. Disconnect the power supply cord. 2. Remove the outer case cabinet, referring to “OUTER CASE CABINET REMOVAL”.
R-8000G 9. Remove the three (3) screws holding the fan motor to the fan motor mounting angle. 10. Now, the fan motor is free. 6. Disconnect the wire leads from the fan motor. 7. Disconnect the connector of the main wire harness from the connector of the thermistor. 8. Release the main wire harness from the hole of the magnetron separator and the hook of the fan motor. 9. Remove the three (3) screws holding the magnetron separator to the bottom plate and the thermal cover back. 10.
R-8000G SIDE HEATING ELEMENT REMOVAL referring to "EXHAUST DUCT, HEATER DUCT LEFT ASSEMBLY, CONVECTION DUCT ASSEMBLY AND HEATER DUCT UPPER ASSEMBLY REMOVAL". 7. Remove the one (1) screw holding the heater mounting angle B to the heater duct left. 8. Remove the two (2) nuts holding the side heating element to the heater duct left. 9. Now, the side heating element is free. 1. Disconnect the power supply cord. 2. Remove the outer case cabinet, referring to “OUTER CASE CABINET REMOVAL”. 3.
R-8000G Reinstallation 1. Reinstall the switch in its place. The door sensing switch is in the lower position of the latch hook right. The 3rd. latch switch is in the upper position of the latch hook right. The secondary interlock switch is in the lower position of the latch hook left. And the monitor switch is in the upper position of the latch hook left. 2. Hold the latch hook (right or left) to the oven cavity front plate with the one (1) screw. 3. Reconnect the wire leads to the switch. 4.
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 adjustment is performed with the door properly installed and closed and while the oven hinges are loose. 1. Loosen the screws holding the oven hinge right and the oven hinge left to the bottom plate with screwdriver. 2.
R-8000G FRONT DOOR GLASS Choke Cover 28. Remove each two (2) screws holding the two glass mounting angles A to the door frame. 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. 31. Release the three (3) tabs holding the upper end of the front door glass and remove the front door glass from the door frame. 32. Now, the front door glass is free.
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.
GRN N.O. COM. R E D 2 3 4 40 GRY BLK G W W W R H H H YT TT TURNTABLE MOTOR GRN GRN B L K B L K Blue Mark OVEN LAMP & SOCKET GRY WHT COM. NOTE: Hot (BLK) wire must be connected to the terminal with blue mark on the oven light socket. DOOR SENSING SWITCH N.C.
VRS1 D3 D5 D7 MICRO COM TTM,OL FTR-F3AA024E RY3 RY1 FTR-F3AA024E Q3 (J2) (J1) + C8 2SB1238 DU18D1-1P(M)-R-S RY2 G4A-1A-DC24V B2P3 -VH CN-E RY5 FAN E3 MOTOR RY6 VE-24HE-K B5P9-VH CN- D D9 JET MOTOR E1 TURN OVER AC208V 60Hz D1 A8 A6 B6P(8-5,7) -VH CN-A D4 FUSE1 A3 1.5K 1/4W D2 0.1u/50V O C11 G,H4 G,H14 G,H15 G,H16 G,H12 10u/50V + G,H13 KRC243M or DTD143ES Q19 Q5 C C1 KIA79L05P I DTA143ESA Q2 0.
R-8000G 2 1 4 3 1G 2G 3G 4G 5G 6G 1a 1a 1a 1a 1a 1a 6 5 7G 1a 8G 9G 10G 1a 1a 1a A A col1 col1 col2 B 2a 2a 3a 3a col2 Dp2 2a 2a 2a 2a 2a 3a 3a 3a 3a 3a S5 S6 S7 Dp3 S1 S2 Dp2 2a 2a 2a Dp2 3a 3a 3a Dp2 S8 S9 Dp3 Dp3 S3 S4 B a h j f C b k C g r n e p c d [ 1G - 10G ] Figure S-3. Grid Assignment of Fluoresent Display Tube D D E E F F G G Figure S-4.
R-8000G 1 2 4 3 5 6 A A B B Figure S-5(a). Printed Wiring Board of CPU Unit (Component side) C C D D Figure S-5(b). Printed Wiring Board of CPU Unit (Solder side) E E F F G G Figure S-6.
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.
R-8000G ∆ ∆ ∆ ∆ ∆ REF. NO. 4-15 4-16 4-17 4-18 4-19 4-20 4-21 4-22 4-23 4-24 4-25 4-26 4-27 4-28 4-29 4-30 4-31 4-32 4-33 4-34 4-35 4-36 4-37 4-38 4-39 4-40 4-41 4-42 4-43 4-44 4-45 4-46 4-47 4-48 4-49 4-50 4-51 4-52 4-53 4-54 4-55 4-56 4-57 4-58 4-59 4-60 4-61 4-62 4-63 4-64 4-65 4-66 4-67 4-68 4-69 4-70 4-71 4-72 4-73 4-74 4-75 4-76 4-77 4-78 4-79 4-80 4-81 4-82 4-83 PART NO.
R-8000G ∆ ∆ ∆ ∆ REF. NO. 5- 3 5- 4 5- 5 5- 6 5- 7 5- 8 5- 9 5-10 5-11 5-12 5-13 5-14 5-15 5-16 5-17 5-18 5-19 5-20 5-21 5-22 5-23 5-24 PART NO.
R-8000G HOW TO ORDER REPLACEMENT PARTS To have your order filled promptly and correctly, please furnish the following information. 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.
G H 1 2 3 48 7-9 7-9 4-75 4-37 4 6-3 6-4 7-16 1-4 4-67 4-70 4-12 7-2 4-34 4-52 7-16 6-15 5 7-4 4-33 1-7 4-14 4-35 7-7 4-55 4-10 7-2 4-32 1-3 7-2 4-23 4-76 7-2 4-9 4-26 4-38 4-5 7-4 4-43 7-19 7-2 1-1 4-4 7-12 2-3 7-21 2-2 1-12 7-2 7-4 7-8 7-12 7-8 7-13 4-80 4-51 7-7 7-4 7-2 7-10 x3 1-2 4-48 4-74 7-13 4-49 4-41 4-29 7-8 7-7 4-47 1-24 x2 4-22 7-2 x4 1-5 4-19 4-20 2-3 6 7-7 7-21 x2 1-6 7-10 7-12 4-50 7-7 7-13 4-80 7-5 4-2 4-
R-8000G 2 1 4 3 MISCELLANEOUS 6 5 POSITION OF PURSE LOCK Harness assembly Main wire harness 6-9 A 6-18 Purse lock LL A Main wire harness 1-23 Touch control transformer Power unit 6-18 Purse lock LL 3-10 6-1 Actual wire harness may be different than illustration.
R-8000G COPYRIGHT © 2004 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, without prior written permission of the publisher. '04 SHARP CORP. (1S1.700E) Printed in U.S.