Sharp R-4S1FH Service Manual
Sharp R-4S1FH Manual
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Sharp R-4S1FH manual content summary:
- Sharp R-4S1FH | Service Manual - Page 1
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 ...9 TEST PROCEDURE ...10 TOUCH CONTROL PANEL - Sharp R-4S1FH | Service Manual - Page 2
to the owner. 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 - Sharp R-4S1FH | Service Manual - Page 3
4S1FH WARNING TO SERVICE PERSONNEL Microwave the Service Manual carefully and follow all instructions. Don't Touch ! Danger High Voltage Before Servicing 1. Disconnect chassis with the use of an insulated screwdriver. Whenever troubleshooting is performed the power supply must be disconnected. - Sharp R-4S1FH | Service Manual - Page 4
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-4S1FH | Service Manual - Page 5
R-4S1FH SERVICE MANUAL MICROWAVE OVEN R-4S1FH FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-4S1FH. It is recommended that service personnel carefully study the entire text of this - Sharp R-4S1FH | Service Manual - Page 6
4S1FH Clock ( 1:00 - 12:59 ) Timer (0 - 99 min. 99 seconds) Microwave Power for Variable Cooking Repetition Rate; P-HI Full power throughout the cooking time P-90 Rules, CFR, Title 21, Subchapter J GENERAL INFORMATION GROUNDING INSTRUCTIONS This oven is equipped with a three prong grounding plug. - Sharp R-4S1FH | Service Manual - Page 7
operate unless the door is securely closed. 3. Removable turntable support. 4. Removable turntable. The turntable will rotate clockwise or 4 3 7 9 11 8 1 10. Wave guide cover. 11. Power supply cord TOUCH CONTROL PANEL R-4S1FH NOTE: The directed features are disabled after one minute - Sharp R-4S1FH | Service Manual - Page 8
R-4S1FH OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a completion of the cooking time, the power transformer, oven lamp, etc. are turned off, and the generation of microwave energy is stopped. The oven will revert to the OFF condition. 6. When the door is opened during a - Sharp R-4S1FH | Service Manual - Page 9
CAPACITOR HIGH VOLTAGE RECTIFIER MAGNETRON WHT WHT WHT WHT WHT WHT WHT COM. N.O. WHT WHT GRY PRIMARY WHT INTERLOCK SWITCH Figure O-2 Oven Schematic - Cooking Condition 7 R-4S1FH - Sharp R-4S1FH | Service Manual - Page 10
R-4S1FH DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM The door is opened by the magnetron 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 C/T fuse remains closed. However, - Sharp R-4S1FH | Service Manual - Page 11
R-4S1FH 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 - Sharp R-4S1FH | Service Manual - Page 12
R-4S1FH TEST PROCEDURE CK = Check / RE = Replace RE RE A B C D E E F F G H RE RE CK I CK CK VOLTAGE DIRTY OVEN CAVITY KEY UNIT RELAY (RY1) COMPU DEFROST FOIL PATTERN ON PWB. CONDITION PROBLEM Home fuse or circuit breaker blows when power cord is plugged into wall receptacle OFF CONDITION C/T - Sharp R-4S1FH | Service Manual - Page 13
R-4S1FH TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 4. To test for an open is installed. 9. Run the oven and check all functions. MICROWAVE OUTPUT POWER The following test procedure should be carried out with the microwave oven in a fully assembled condition (outer case fitted). HIGH - Sharp R-4S1FH | Service Manual - Page 14
R-4S1FH TEST PROCEDURES PROCEDURE LETTER C COMPONENT TEST HIGH VOLTAGE RECTIFIER TEST 1. restricted 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-4S1FH | Service Manual - Page 15
R-4S1FH PROCEDURE LETTER TEST PROCEDURES COMPONENT TEST 5. If the C/T fuse is blown when the door is opened, check the secondary interlock relay, primary interlock switch and - Sharp R-4S1FH | Service Manual - Page 16
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 also the Control Unit is divided into two units, LSI Unit and Power Unit, and troubleshooting - Sharp R-4S1FH | Service Manual - Page 17
R-4S1FH TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 2) Open the door and block it certain group of indicators do not light up. g) The figure of all digits flicker. 2-3 Other possible problems caused by defective control unit. a) Buzzer does not sound or continues to sound. b) Clock does not - Sharp R-4S1FH | Service Manual - Page 18
14 13 12 11 10 9 R-4S1FH PROCEDURE LETTER TEST PROCEDURES COMPONENT TEST 8 7 6 5 4 3 2 DEFROST 1 COOK 4 POPCORN REHEAT 7 Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation. DC. voltage indicated Defective relay. DC. voltage not indicated - Sharp R-4S1FH | Service Manual - Page 19
PROCEDURE LETTER TEST PROCEDURES COMPONENT TEST R-4S1FH (7) If improper operation is indicated, the control 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. - Sharp R-4S1FH | Service Manual - Page 20
R-4S1FH TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units. (1) Key Unit (2) Control Unit (The Control Unit - Sharp R-4S1FH | Service Manual - Page 21
I/O signal of the LSI is detailed in the following table. R-4S1FH Pin No. Signal 1-2 VL2-VL1 I/O Description IN Power source the cook relay (RY2). The signals holds "L" level during OFF H : GND microwave cooking and "H" level while not cooking. In other cooking modes (variable cooking) the - Sharp R-4S1FH | Service Manual - Page 22
R-4S1FH Pin No. Signal I/O 27 RESET IN 28 P71 OUT 29 P70 IN 30 XIN IN 31 XOUT OUT 32 VSS IN 33 P27 OUT 34 - Sharp R-4S1FH | Service Manual - Page 23
. Common data signal. Connected to LCD signal COM2. Common data signal. Connected to LCD signal COM1. Power source voltage input terminal. Standard voltage for LCD. R-4S1FH 21 - Sharp R-4S1FH | Service Manual - Page 24
R-4S1FH TOUCH CONTROL PANEL SERVICING 1. Precautions for Handling Electronic Components This unit uses power supply of the oven: CAUTION: THE HIGH VOLTAGE TRANSFORMER OF THE MICROWAVE OVEN IS STILL LIVE DURING SERVICING AND PRESENTS A HAZARD. Therefore, before checking the performance of the touch - Sharp R-4S1FH | Service Manual - Page 25
4S1FH WARNING AGAINST HIGH VOLTAGE: Microwave exposure to microwave energy, please follow the instructions below before Without the RF gasket (Magnetron). 2. If the wave guide or oven cavity are not intact. 3. If the 3) Sharp edge: Bottom plate, Oven cavity, Waveguide flange, Chassis support and - Sharp R-4S1FH | Service Manual - Page 26
R-4S1FH CAUTION: 1. DISCONNECT OVEN FROM POWER SUPPLY BEFORE REMOVING OUTER CASE. voltage capacitor. 4. Disconnect wire leads from magnetron. 5. Remove the two (2) screws holding the chassis support to the magnetron and the oven cavity front flange. 6. Slide the magnetron duct slightly so that the - Sharp R-4S1FH | Service Manual - Page 27
R-4S1FH OVEN LAMP AND LAMP SOCKET REMOVAL 1. Disconnect the power supply cord and remove outer case. 2. Open the door and block it open. 3. Discharge high voltage - Sharp R-4S1FH | Service Manual - Page 28
R-4S1FH Installation 1. Remove Disconnect the power supply cord. 2. Remove turntable and turntable support from oven cavity. 3. Lay the oven on it's backside Where the corners have been snipped off bend corner areas flat. No sharp edges must be evident after removal of the turntable motor cover. 5. - Sharp R-4S1FH | Service Manual - Page 29
R-4S1FH COOLING FAN MOTOR REMOVAL REMOVAL 1. Disconnect the power supply cord and then fan blade to the fan motor 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 lock tight into the hole ( - Sharp R-4S1FH | Service Manual - Page 30
R-4S1FH 3. Secure latch hook (with two (2) mounting screws) to oven flange. 4. Make sure opened. 4. Re-install outer case and check for microwave leakage around door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.) Latch Heads Door Switch Lever Door Sensing - Sharp R-4S1FH | Service Manual - Page 31
R-4S1FH 9. Release the door panel from twelve (12) tabs of door frame. 10.Remove chapter "Test Procedures".). (B) An approved microwave survey meter should be used to assure compliance with proper microwave radiation emission limitation standards. After any service, make sure of the following : 1. - Sharp R-4S1FH | Service Manual - Page 32
R-4S1FH A B C D E F G H 1 1 2 2 12 3 3 to Oven cavity DOOR SENSING SWITCH COM. N.O. PNK GRN GRN GRN CN-B (POWER UNIT) WHT COM. RY1 N.O. GRY COM. RY2 N.O. T1 SECONDARY INTERLOCK RELAY 2 - Sharp R-4S1FH | Service Manual - Page 33
1 A B C D E 2 3 4 5 R-4S1FH 6 A B C D E NOTE : IF NOT SPECIFIED, 1/4W ± 5% T1 24 D1-D4 1N4002 D3 D1 LD1 LD2 LD3 LD4 WH-1 WH-1 WH-1 WH-1 10G471K VRS1 (J10) (J12) (J14) ( - Sharp R-4S1FH | Service Manual - Page 34
R64 15k 8 7 6 5 DEFROST 1 COOK 4 POPCORN REHEAT 7 4 3 2 1 2 START 5 TIMER CLOCK 9 8 STOP CLEAR 3 0 POWER LEVEL 6 MINUTE PLUS KEY UNIT R63 15k R62 15k R61 15k R60 15k B B A A 6 5 4 3 2 1 R-4S1FH - Sharp R-4S1FH | Service Manual - Page 35
C1 B Q21 D21 D4 D3 D1 C3 (J16) (J14) (J12) (J10) JP4 JP5 JP3 E D22 RY1 C2 3 D2 2 VRS1 4 S P 1 T1 FB 037 MR RY2 (J1) R-4S1FH 6 A B C D E F G MCR M27A 94V-0 R H 1 Figure S-5 . Printed Wiring Board of Power Unit 2 3 4 5 33 H 6 - Sharp R-4S1FH | Service Manual - Page 36
R-4S1FH PARTS LIST Note: The parts marked "∆" may cause undue microwave exposure. The parts marked "*" are used in voltage more than 250V. "§" MARK: PARTS DELIVERY SECTION. REF. NO. PCUSGB033MRP0 M OVEN PARTS H.V. Capacitor band Chassis support Latch hook Switch lever Magnetron duct Fan blade - Sharp R-4S1FH | Service Manual - Page 37
support NTNT-A108WRE0 M Turntable tray TCAUAB045MRR0 M Monitor caution label TCAUAB038MRR0 M DHHS/Screw caution label TINSEB314MRK0 M Operation manual M Screw : 4mm x 8mm LX-CZA070WRE0 M Special screw (Torx tamper proof screw) R-4S1FH Q'TY CODE 1 AQ 1 AD 1 AB 1 AX 1 AD 1 AK 1 AG SHARP parts - Sharp R-4S1FH | Service Manual - Page 38
R-4S1FH 1 2 3 OVEN AND CABINET PARTS A 4 5 6 7-8 A 7-8 7-6 B C D 4-8 2-3 B 4-7 7-6 7-5 6-6 1-9 C 1-5 4-6 7-3 1-13 1-8 7-6 1-6 D 7-7 4-2 7-4 E 4-9 1-10 E 6-5 1-3 7-2 1-4 7-2 6-4 7-4 7-1 4-5 4-10 4-3 1-7 1-11 F 1-12 7-5 4-11 1-6 F 6-3 2-1 1-7 7-1 4-4 - Sharp R-4S1FH | Service Manual - Page 39
1 2 CONTROL PANEL PARTS A 3-2-1 3 4 3 - 3 3 - 5 3 - 2 3 - 4 5 3 - 1 3 - 6 B R-4S1FH 6 A B 3-2-3 C 3-2-2 C DOOR PARTS 5-7 D D 5-4 E 5-6 E 5-5 F G 5-1 H 1 2 F 5-2 5-3 6-1 G 6-2 6-8 Actual wire harnes s may be different from illus tration. H 3 4 5 6 37 - Sharp R-4S1FH | Service Manual - Page 40
R-4S1FH PACKING AND ACCESSORIES DOOR PR OTE C TION S HE E T 6-5 TUR NTABLE TR AY ON TOP OF THE OVE N TR AY HOLDE R TOP P AD AS S E MBLY PLAS TIC BAG 6-7 OP E R ATION MANUAL INTO THE OVE N CAVITY BOTTOM P AD AS S E MBLY 6-4 TUR NTABLE S UP P OR T PAC KING C AS E Non-replaceable items 38 - Sharp R-4S1FH | Service Manual - Page 41
NOTES R-4S1FH 39 - Sharp R-4S1FH | Service Manual - Page 42
R-4S1FH NOTES 40 - Sharp R-4S1FH | Service Manual - Page 43
NOTES R-4S1FH 41 - Sharp R-4S1FH | Service Manual - Page 44
R-4S1FH COPYRIGHT © 2002 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in retrieval , electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher. 2002 SHARP CORP. (4M2.20E) Printed in U.S.A 42
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R-4S1FH
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 con-
tain 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 Recti-
fier Assembly,
High Voltage Harness etc..)
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING 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
.............................................................................................................................
9
TEST PROCEDURE
...........................................................................................................................................
10
TOUCH CONTROL PANEL
................................................................................................................................
18
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
....................................................................
23
PICTORIAL DIAGRAM
........................................................................................................................................
30
POWER UNIT CIRCUIT
.......................................................................................................................................
31
CPU UNIT CIRCUIT
.............................................................................................................................................
32
PRINTED WIRING BOARD
.................................................................................................................................
33
PARTS LIST
........................................................................................................................................................
34
PACKING AND ACCESSORIES
.........................................................................................................................
38
S62M192R4S1FE
R-4S1FH
MICROWAVE OVEN
MODEL
SERVICE MANUAL
SHARP ELECTRONCS CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135
R-4S1FH