R- 50 1CK R-501CW SERVICE MANUAL S110M153R501CE MICROWAVE OVEN MODELS R-501CK R-501CW 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. R-501CW 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-501CK R-501CW 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-501CK R-501CW 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-501CK R- 501CW 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-501CK R-501CW SERVICE MANUAL PRODUCT DESCRIPTION MICROWAVE OVEN R-501CK/ R-501CW GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-501CK and R-501CW. 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-501CK R- 501CW SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 13.0 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 1000 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHz Case Dimensions Width 24" Height 13-3/8" Depth 19-1/8" Cooking Cavity Dimensions Width 17-3/8" Height 10-1/2" Depth 18-5/8" 2.0 Cubic Feet Control Complement Touch Control System Clock ( 1:00 - 12:59 ) Timer (0 - 99 min. 99 seconds) Microwave Power for Variable Cooking Repetition Rate; P-HI .
R-501CK R-501CW contact a qualified electrician and have it replaced with a properly grounded three-pronged wall receptacle or have a grounding adapter properly grounded and polarized. If the extension cord must be used, it should be a 3-wire, 15 amp. or higher rated cord. Do not drape over a countertop or table where it can be pulled on by children or tripped over accidentally. CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE ROUND GROUNDING PRONG FROM THIS PLUG. OVEN DIAGRAM 1.
R-501CK R- 501CW OPERATION DESCRIPTION OF OPERATING SEQUENCE relay and is mechanically associated with the door so that it will function in the following sequence. (1) When the door opens from the closed position, the primary interlock relay (RY2) and secondary interlock switch open their contacts. And contacts of the relay (RY1) remains closed. Then the monitor switch contacts close. (2) When the door is closed from the open position, the monitor switch contacts open first.
R-501CK R-501CW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CLOCK APPEARS ON DISPLAY. MAGNETRON TEMP. FUSE NOTE: Indicates components with potential above 250 V. MONITOR FUSE 20A COM. N.O. A2 CAPACITOR 1.0µF AC 2300V (RY-2) PRIMARY INTERLOCK RELAY (RY-1) A1 GRN CONTROL UNIT N.O. COM. 120V AC 60 Hz B1 CAVITY TEMP. FUSE POWER TRANSFORMER B2 N.C. DOOR SENSING SWITCH TTM OL TURNTABLE MOTOR OVEN LAMP MONITOR SWITCH FM COM. H.V.
R-501CK R- 501CW DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM open, the monitor fuse blows simultaneously with closing of the monitor switch contacts. CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE TEST THE DOOR SENSING SWITCH, PRIMARY INTERLOCK RELAY (RY2), RELAY (RY1), SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. (REFER TO CHAPTER "TEST PROCEDURE"). NOTE: MONITOR FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY.
R-501CK R-501CW 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-501CK R- 501CW CK = Check / RE = Replace Home fuse or circuit breaker blows when power cord is plugged into wall receptacle Monitor fuse blows when power cord is plugged into wall receptacle. OFF CONDITION All letters and indicators do not appear in display when power cord is first plugged into wall outlet. Display does not operate properly when STOP/CLEAR key is touched. (Buzzer should sound and ":" or time of day should appear in display.) Oven lamp does not light when door is opened.
R-501CK R-501CW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 4. To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check across the magnetron filament leads should indicate less than 1 ohm. 5. To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads and chassis ground. This test should indicate an infinite resistance. If there is little or no resistance the magnetron is grounded and must be replaced. 6.
R-501CK R- 501CW TEST PROCEDURES PROCEDURE LETTER C COMPONENT TEST HIGH VOLTAGE RECTIFIER TEST 1. 2. 3. 4. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance across the terminals and observe, reverse the leads to the rectifier terminals and observe meter reading.
R-501CK R-501CW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST CAUTION: IF THE TEMPERATURE FUSE INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE TEMPERATURE FUSE. F SECONDARY INTERLOCK SWITCH TEST 1. 2. 3. 4. 5. 6. 7. 8. Disconnect the power supply cord, and then remove outer case. 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-501CK R- 501CW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. 6. 7. 8. Reconnect all leads removed from components during testing. Reinstall the outer case (cabinet). Reconnect the power supply cord after the outer case is installed. Run the oven and check all Screw Driver functions. RED WHT/WHT Monitor Switch Ohmmeter Secondary Interlock Switch H BLOWN MONITOR FUSE TEST 1. 2. 3. 4. Disconnect the power supply cord, and then remove outer case. Open the door and block it open.
R-501CK R-501CW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST b) When touching a number pad, two figures or more are displayed. c) When touching the pads, sometimes a pad produces no signal. If the Key unit is defective. 1) Disconnect the power supply cord, and then remove outer case. 2) Open the door and block it open. 3) Discharge high voltage capacitor. 4) Replace the Key unit. 5) Reconnect all leads removed from components during testing. 6) Re-install the outer case (cabinet).
R-501CK R- 501CW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 8. Run the oven and check all functions. G8 G7 G6 G5 G4 G3 G9 5 4 3 2 1 MINUTE PLUS G10 0 9 8 7 6 FRESH VEGETABLES START TIMER CLOCK G11 FROZEN POWER CASSEROLE POPCORN ENTREES LEVEL G12 BEVERAGE G1 ROLLS & MUFFINS COMPU DINNER DEFROST PLATE FROZEN VEGETABLES BAKED POTATOES STOP CLEAR G2 G13 G14 K RELAY TEST 1. 2. 3. 4. 5. Disconnect the power supply cord, and then remove outer case.
R-501CK R-501CW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST (6) If improper operation is indicated, the control unit is probably defective and should be checked. FOIL PATTERN ON THE PRINTED WIRING BOARD TEST To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse. 1. Foil pattern check and repairs. 1) Disconnect the power supply cord, and then remove outer case. 2) Open the door and block it open.
R-501CK R- 501CW TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL 3) Power Source Circuit This circuit generates voltages necessary in the control unit from the AC line voltage. In addition, the synchronizing signal is available in order to compose a basic standard time in the clock circuit. The touch control section consists of the following units. (1) Key Unit (2) Control Unit (The Control Unit consists of Power Unit and LSI Unit).
R-501CK R-501CW Pin No. Signal I/O Description 11 P57 OUT Back light circuit (Light emitting diodes) driving signal. 12-13 P56-P55 OUT Terminal not used. 14 CNTR0 OUT Signal to sound buzzer (2.0 kHz). A: key touch sound. B: Completion sound. 0.1 sec. H : GND A L : -5V 2.0 sec. H : GND B L : -5V 15 P53 OUT Oven lamp, fan motor and turntable motor driving signal 16.7 msec. To turn on and off shut off relay (RY1).
R-501CK R- 501CW Pin No. Signal I/O Description 33 P27 OUT Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P41, P43, P44 and P45 terminal while one of G8 line keys on key matrix is touched. 34 P26 OUT Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P41, P43, P44 and P45 terminal while one of G7 line keys on key matrix is touched. 35 P25 OUT Key strobe signal. Signal applied to touch-key section.
R-501CK R-501CW TOUCH CONTROL PANEL SERVICING repair all the controls (sensor-related ones included) of the touch control panel while keeping it connected to the oven. B. On some models, the power supply cord between the touch control panel and the oven proper is long enough that they may be separated from each other.
R-501CK R- 501CW 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-501CK R-501CW CAUTION: 1. DISCONNECT OVEN FROM POWER SUP PLY BEFORE REMOVING OUTER CASE. 2. DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. NOTE: When replacing the outer case, the 2 special Torx screws must be reinstalled in the same locations. Special screw Screw Driver (Type: TORX T20 H or GTXH20-100) POWER TRANSFORMER REMOVAL 1. Disconnect the power supply cord and then remove outer case. 2. Open the oven door and block it open. 3.
R-501CK R- 501CW OVEN LAMP AND LAMP SOCKET REMOVAL Disconnect the power supply cord and remove outer case. Open the door and block it open. Discharge high voltage capacitor. Remove the oven lamp from the oven lamp socket. Pull the wire leads from the oven lamp socket by pushing the terminal hole of the oven lamp socket with the small flat type screw driver. 6. Remove the oven lamp socket from the magnetron duct by turning the socket counterclockwise. 7.
R-501CK R-501CW COOLING FAN MOTOR REMOVAL CAUTION: * Do not reuse the removed fan blade because the hole (for shaft) may be larger than normal. REMOVAL 1. Disconnect the power supply cord and then remove outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. 4. Disconnect the wire leads from the fan motor. 5. Remove the two (2) screws holding the fan motor to the oven cavity back plate. 6. Remove the fan blade from the fan motor shaft according to the following procedure. 7.
R-501CK R- 501CW forth, and up and down. In and out play of the door allowed by the upper and lower position of the latch hook should be less than 0.5mm. The vertical position of the latch hook should be adjusted so that the door sensing switch and secondary interlock switch are activated with the door closed. The horizontal position of the latch hook should be adjusted so that the plunger of the monitor switch is pressed with the door closed. 6. Secure the screws with washers firmly. 7.
R-501CK R-501CW Note: The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle. This function does not require that door be airtight, moisture (condensation)-tight or light-tight. Therefore, occasional appearance of moisture, light or sensing of gentle warm air movement around oven door is not abnormal and do not of themselves indicate a leakage of microwave energy from oven cavity.
R-501CK R- 501CW RED RED 1 MAGNETRON TEMP. FUSE WHT A WHT B C D E F G H 1 CAVITY TEMP. FUSE NOTE: The grounding conductor of the power supply cord has been grounded by power supply cord fixing screw. The screw must always be kept tight. RED H N WHT GRY DOOR SENSING SWITCH CONTROL UNIT N.O. PNK COM. POWER SUPPLY CORD 120V 60Hz GRN 2 2 to Oven cavity (LSI UNIT) GRN NOTE: The neutral (WHT/GRY) wire must be connected to the terminal with "N" mark on the power supply cord.
R-501CK R-501CW 2 1 4 3 6 5 A A B B A1 AC A2 + d a – (J1) D c OVEN LAMP TURNTABLE MOTOR FAN MOTOR C3 GND C5 VR SP1 PKM22EPT b C1 2200µ/25v CN-A CN-C 9PIN LEAD WIRE HARNESS D1 S1NB10 10G471K C VRS1 T1 D C9 INT NO C4 BUZZER COM C6 OVEN LAMP TURNTABLE MOTOR FAN MOTOR NO C8 MICRO COM C7 (BROWNER) SH-A C2 NC SH-B C1 DOOR RY1 E AC C E RY2 MICRO F DOOR SENSING SWITCH F G G H H Figure S-2.
R-501CK R- 501CW A B C D E F G H LIQUID CRYSTAL DISPLAY LSI UNIT C-8 – D20 MA152WA R40 R41 15k 25 R80 COM1 COM2 COM3 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG 9 SEG 8 SEG 7 SEG 6 SEG 5 SEG 4 SEG 3 SEG 2 SEG 1 SEG10 41 40 R90 15k CF1 CST4.
R-501CK R-501CW 2 1 4 3 6 5 A A B B C 2 D CN-B - + DU OM MICRO 9 CN-C 1 C1 - SP1 KPC-M-PP 1 DIP RY2 C QKITPB034MRE0 + D1 D 7 RY1 DU OM 1 S OL TTM FM AC (J1) P T1 3 E 2 CN-A 1 AC E 4 VRS1 RM430BF F F G G H H Figure 1 2 S-5 .
R-501CK R- 501CW PARTS LIST ∆” may cause undue microwave exposure. Note: The parts marked “∆ The parts marked “*” are used in voltage more than 250V. "§" MARK: PARTS DELIVERY SECTION. REF. NO. PART NO.
R-501CK R-501CW REF. NO. PART NO.
R-501CK R- 501CW 2 1 4 3 6 5 OVEN AND CABINET PARTS 7-10 A A 7-10 7-7 2-3 B B 7-9 4-7 7-7 6-7 7-6 1-10 C C 1-5 4-6 7-3 7-9 7-6 1-14 7-8 D 4-8 D 1-9 7-8 4-2 7-5 1-11 E 4-9 6-6 7-2 6-3 E 1-3 1-4 7-2 6-5 7-5 4-5 7-4 1-8 4-3 4-10 1-12 F F 1-13 7-11 4-13 2-1 6-4 1-7 1-8 7-1 4-4 1-6 4-1 1-1 4-12 G G 1-2 7-5 2-2 2-2 7-5 2-2 H 1 2 4-11 7-5 2-2 H 4 3 34 5 6
R-501CK R-501CW 2 1 4 3 5 6 CONTROL PANEL PARTS A A 3-4 3-2 3-5 3-5 3-3 B B 3-1 3-2-1 C C 3-2-2 DOOR PARTS 3-2-3 5-4 D D 5-2 E E 5-5 5-3 F F 5-1-1 MISCELLANEOUS 5-1-2 5-1 6-1 G G 6-9 6-2 H H Actual wire harness may be different from illustration.
R-501CK R- 501CW PACKING AND ACCESSORIES TOP PAD ASSEMBLY DOOR PROTECTION SHEET PLASTIC BAG TRAY HOLDER 6-5 TURNTABLE TRAY 6-8 OPERATION MANUAL 6-4 TURNTABLE SUPPORT IN TO TH EO N VE CA VIT Y BOTTOM PAD ASSEMBLY TRAY PACK PACKING CASE 36
R-501CK R-501CW Notes: 37
R-501CK R- 501CW COPYRIGHT © 2000 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. '00 SHARP CORP. (11M3187E) Printed in U.S.