R-310BK R-310BW SERVICE MANUAL S4809R310BPW/ MICROWAVE OVEN MODELS ON DEF. LBS. QTY.
R-310BK R-310BW 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-310BK R-310BW 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-310BK R-310BW 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-310BK R-310BW SERVICE MANUAL PRODUCT DESCRIPTION MICROWAVE OVEN R-310BK/ R-310BW 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-310BK, R-310BW. OPERATION 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-310BK R-310BW SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 14 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 1100 watts (IEC-705 TEST PROCEDURE) Operating frequency of 2450MHz Width 20-1/2" Height 11-7/8" Depth 15-7/8" Width 13-3/4" Height 8-3/8" Depth 14-7/8" Case Dimensions Cooking Cavity Dimensions 1.0 Cubic Feet Control Complement Touch Control System Clock ( 1:00 - 12:59 ) Timer (0 - 99 min.
R-310BK R-310BW A short power-supply cord is provided to reduce risks of becoming entangled in or tripping over a longer cord. Where a two-pronged wall-receptacle is encountered, it is the personal responsibility and obligation of the customer to 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.
R-310BK R-310BW OPERATION DESCRIPTION OF OPERATING SEQUENCE 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. Then the contacts of the secondary interlock switch and door sensing switch close.
R-310BK R-310BW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY MONITOR FUSE 20A THERMAL CUT-OUT (OVEN) THERMAL CUT-OUT (MG.) COM. POWER TRANSFORMER N.O. A2 (RY-2) (RY-1) A1 CONTROL UNIT N.O. CAPACITOR 1.0µF / AC 2300V PRIMARY INTERLOCK RELAY COM. SH-B GRN 120V AC 60 Hz SH-A DOOR SENSING SWITCH TTM OL MONITOR SWITCH FM RECTIFIER MAGNETRON TURNTABLE MOTOR OVEN LAMP FAN MOTOR SECONDARY INTERLOCK SWITCH Figure O-1.
R-310BK R-310BW 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-310BK R-310BW 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-310BK R-310BW CK = Check / RE = Replace Home fuse or circuit breaker blows when power cord is plugged into wall receptacle OFF CONDITION Monitor fuse blows when power cord is plugged into wall receptacle. 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-310BK R-310BW TEST PROCEDURES PROCEDURE LETTER A COMPONENT TEST MAGNETRON ASSEMBLY TEST 1. 2. 3. 4. 5. 6. 7. 8. 9. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. 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.
R-310BK R-310BW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST (HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO MEASURE THE FILAMENT AND HIGH VOLTAGE.) C 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.
R-310BK R-310BW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. Reconnect all leads removed from components during testing. 6. Reinstall the outer case (cabinet). 7. Reconnect the power supply cord after the outer case is installed. 8. Run the oven and check all functions. CAUTION: IF THE THERMAL CUT-OUT INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE THERMAL CUT-OUT. F SECONDARY INTERLOCK SWITCH TEST 1. 2. 3. 4. 5. 6. 7. 8. Disconnect the power supply cord, and then remove outer case.
R-310BK R-310BW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. 6. 7. 8. with the door opened (in this condition the plunger of the monitor switch is pushed in), the meter should indicate an open circuit. If improper operation is indicated, the switch may be defective. After testing the monitor switch, reconnect the wire lead to the monitor switch (COM) terminal and check the continuity of the monitor circuit. RED Reconnect all leads removed from GRY WHT components during testing.
R-310BK R-310BW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 7) Reconnect the power supply cord after the outer case is installed. 8) Run the oven and check all functions. The following symptoms indicate a defective key unit. 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. c) When touching the pads, sometimes a pad produces no signal. If the key unit is defective.
R-310BK R-310BW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST G9 5 4 3 2 1 G10 0 9 8 7 6 G12 G11 5. 6. 7. 8. the above method may be used (after clearing the control unit) to determine if the control unit or key pad is at fault. Reconnect all leads removed from components during testing. Re-install the outer case (cabinet). Reconnect the power supply cord after the outer case is installed. Run the oven and check all functions.
R-310BK R-310BW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST (5) If improper operation is indicated, the control unit is probably defective and should be checked. M 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-310BK R-310BW TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units. 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. (1) Key Unit (2) Control Unit (The Control Unit consists of Power Unit and CPU Unit).
R-310BK R-310BW DESCRIPTION OF LSI LSI(IZA891DR) The I/O signals of the LSI(IZA891DR) are detailed in the following table. Signal I/O SEG0-SEG11 OUT Description Segment data signal. Connected to LCD. The relation between signals are as follows: LSI signal LCD (Pin No.) SEG 0 ............................................. S12 SEG 1 ............................................. S11 SEG 2 ............................................. S10 SEG 3 ............................................... S9 SEG 4 ......
R-310BK R-310BW Pin No. Signal I/O Description R81 OUT Key strobe signal. Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one of G7 line keys on key matrix is touched. R82 OUT Key strobe signal. Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal while one of G6 line keys on key matrix is touched. R83 OUT Key strobe signal. Signal applied to touch-key section.
R-310BK R-310BW TOUCH CONTROL PANEL SERVICING 5) Re-connect the power supply cord after the outer case is installed. 6) Run the oven and check all functions. A. On some models, the power supply cord between the touch control panel and the oven itself is so short that the two can’t be separated. For those models, check and repair all the controls (sensor-related ones included) of the touch control panel while keeping it connected to the oven. After checking the performance of the touch control panel, B.
R-310BK R-310BW 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-310BK R-310BW 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 remove outer case. 2. Open the oven door and block it open. 3. Discharge high voltage capacitor.
R-310BK R-310BW MAGNETRON REMOVAL Removal 1. Disconnect the power supply cord and remove outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. 4. Disconnect wire leads from magnetron. 5. Remove the one (1) screw holding chassis support to magnetron. 6. Remove the chassis support from oven. 7. Remove the one (1) screw holding magnetron air guide to magnetron. 8. Remove the magnetron air guide 9. Carefully remove the four (4) screws holding magnetron to waveguide flange. 10.
R-310BK R-310BW NOTE: 1. Before attaching a new key unit, wipe off remaining adhesive on the control panel frame surfaces completely with a soft cloth soaked in alcohol. 2. When attaching the key unit to the control panel frame, adjust the upper edge and right edge of the key unit to the correct position of control panel frame. 3. Stick the key unit firmly to the control panel frame by rubbing with soft cloth not to scratch. Solder CPU unit These should be parallel Connector Power unit Figure C-4.
R-310BK R-310BW 7. Install the fan duct assembly to the oven cavity with the one (1) screw. 8. Insert the snap of the main wire harness to the hole of the fan duct and insert the main wire harness into the hole of the fan duct. 9. Install the magnetron and the chassis support to the oven cavity, referring to "Re-install of MAGNETRON REMOVAL". 10.Connect the wire leads to the fan motor, referring to the pictorial diagram.
R-310BK R-310BW DOOR REPLACEMENT REMOVAL 1. Disconnect the power supply cord. 2. Push the open button and open the door slightly. 3. Insert a putty knife (thickness of about 0.5mm) into the gap between the choke cover and door frame as shown in Figure C-7 to free engaging parts. 4. Pry the principles of the lever and lift up the choke cover by inserting a putty knife as shown in Figure C-7. 5. Release choke cover from door panel. 6. Now choke cover is free. 7.
1 2 RY1 T1 RY1 RY2 3 28 4 YLW YLW (N.O.) COM. 5 COM. GRY WHT WHT WHT BLK WHT Figure S-1. Pictorial Diagram TURNTABLE MOTOR FAN MOTOR RED GRY GRY C WHT WHT BLK GRY BLK BLK GRN WHT BLK NOTE: The neutral (WHT) wire must be connected to the neutral (WHT) wire of the power supply cord. POWER SUPPLY CORD 120V 60Hz POWER TRANSFORMER MAGNETRON HIGH VOLTAGE COMPONENTS WHT WHT BLK NOTE: The grounding (GRN) wire of the power supply cord has been grounded by screw.
R-310BK R-310BW 2 1 4 3 6 5 LD1 LD2 LD3 LD4 LD5 LD1-LD5 A A WH-1 VR R4 27 D1-D4 11ES1 4 D5 C1 D4 3 C a 6 C1 0.1µ/50v VRS1 d B D1 D3 A2 R5 4.7k D6 D2 b + – C2 VR + – C3 C R3 820 1/2w (J1) R2 820 1/2w C4 10µ/35v 1 A1 AC C2 1000µ/35v T1 B Q2 2SB1238 C4 SP1 c D D C5 RY1 N.O. TURNTABLE MOTOR OVEN LAMP COM FAN MOTOR E MICRO D7 R6 3.3k C6 RY2 C7 N.O.
C8 C7 C6 DOOR C9 SWITCH (RY3) RY2 RY1 BUZZER C 5 NOTE R12 15k R14 15k 4 R13 15k 5 : IF NOT SPECIFIED, 1SS355 : IF NOT SPECIFIED, 1/10w ± 5% D20 MA152WA C11 47µ/16v C12 0.01µ/25v Q22 DTA123JKA C20 0.
R-310BK R-310BW 2 1 4 3 6 5 A A WH - 1 1 2 LD1 B LD3 LD2 LD4 LD5 B DIP C (CN - C) 1 12 2 1 2 C5 D8 R6 D 4 E 5 6 ZD1 R1 B Q3 SP1 1 D7 VRB D 2 7 8 9 U SH - A R2 D5 D6 SH - B B Q2 E Q1 B R5 R4 3 R3 C CN - C 1 WH - 1 C4 D 1 9 E C3 CN - B E E C2 RY2 T1 AC D1 D3 F F S D4 D2 1 VH 2 CN - A XA D9 U AC RY1 G (CN - D) OMIF D G VRS1 QKITPB026MRE0 F P 11 C1 10 (D10) OL FM TTM RY3 H H Figure S-4.
R-310BK R-310BW 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-310BK R-310BW ∆ REF. NO. 4- 6 4- 7 4- 8 4- 9 4-10 4-11 4-12 4-13 4-14 4-15 4-16 4-17 4-18 4-19 4-20 4-21 PART NO.
R-310BK R-310BW 2 1 4 3 6 5 7-5 OVEN AND CABINET PARTS 2-1 7-4 A A 7-5 4-1 7-4 1-11 7-5 B B 1-10 4-9 7-1 1-4 7-7 6-7 C C 1-8 4-17 6-6 1-13 4-16 7-2 4-10 4-21 D 7-2 D 6-9 7-6 7-3 7-3 4-7 1-5 4-15 E E 4-12 1-1 7-5 1-6 1-2 7-1 4-2 4-14 7-5 1-7 F 4-3 1-12 4-4 1-1 2-2 7-3 4-8 4-20 F 1-3 7-5 4-11 4-19 7-1 4-5 7-1 4-6 1-14 G 7-6 6-2 G 4-13 7-6 1-9 2-4 1-5 2-3 7-6 6-1 2-5 7-1 7-6 H 7-6 7-6 H 7-6 7-6 1 2 7-6 2-4 4 3 34 5 6
R-310BK R-310BW 2 1 4 3 CONTROL PANEL PARTS 6 5 3-7 3-1F A A 3-4 3-2 3-7 3-3 B B 3-1 3-3-1 3-7 C C DOOR PARTS 3-5 3-6 4-18 5-10 D D 5-2 5-9 5-1 5-7 5-8 for R-310BK only E E 5-3 5-4 5 for -8 R-3 10B Wo 5-9 for R-310BK only nly F F 5-8 for R-310BK only 5-5 5-6 G G MISCELLANEOUS 6-3 (HIGH VOLTAGE TRANSFORMER) (CAPACITOR) 6-4 H Actual wire harness may be different from illustration.
R-310BK R-310BW 1 2 4 3 6 5 PACKING AND ACCESSORIES A A TOP PAD ASSEMBLY FPADBA341WRK0 DOOR PROTECTION SHEET CABINET COVER for R-310BK SPADPA204WRE0 SPAKHA003WRE0 B B PLASTIC BAG SSAKHA034WRE0 6- 8 INSTRUCTION BOOK & PRINTING MATTER 6- 2 TURNTABLE TRAY C C BOTTOM PAD ASSEMBLY FPADBA342WRK0 6- 1 TURNTABLE SUPPORT TRAY PACK INTO THE OVEN CAVITY SPADFA397WRE0 D D Not replaceable items.
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R-310BK R-310BW COPYRIGHT © 1998 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in a retrieval systems, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher. '98 SHARP CORP. (4S2.530E) Printed in U.S.
