R-310FK R-310FW SERVICE MANUAL S1202R310FPW/ MICROWAVE OVEN MODELS R-310FK R-310FW REHEAT CENTER COMPU DEFROST 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- 310 FK R-310FW 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-310FK R-310FW 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- 310 FK R-310FW 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-310FK R-310FW SERVICE MANUAL PRODUCT DESCRIPTION MICROWAVE OVEN R-310FK/ R-310FW GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVENS, R-310FK and R-310FW. 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. Check the interlock switches and the door seal carefully.
R- 310 FK R-310FW SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 14.2 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 1200 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHz Case Dimensions Width 20-1/2" Height 11-7/8" Depth 17-1/8" Cooking Cavity Dimensions Width 14-3/4" Height 8-3/4" Depth 15-3/4" 1.2 Cubic Feet Control Complement Touch Control System Clock ( 1:00 - 12:59 ) Timer (0 - 99 min.
R-310FK R-310FW 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.
R- 310 FK R-310FW OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. 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.
R-310FK R-310FW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY NOTE: " " indicates components with potential above 250V. THERMAL CUT-OUT (OVEN) MONITOR FUSE 20A THERMAL CUT-OUT (MG.) N.O. N.O. A2 (RY-2) (RY-1) A1 POWER TRANSFORMER CONTROL UNIT COM. COM.
R- 310 FK R-310FW DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM 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. The door is opened by pulling the door. Refer to the Figure D-1.
R-310FK R-310FW 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- 310 FK R-310FW 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-310FK R-310FW 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- 310 FK R-310FW 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-310FK R-310FW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 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. 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- 310 FK R-310FW 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 WHT functions. RED Screw Driver Monitor Switch Secondary Interlock Switch H Ohmmeter 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-310FK R-310FW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 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). 7) Reconnect the power supply cord after the outer case is installed.
R- 310 FK R-310FW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST G8 G7 G6 G5 G4 G3 G2 G9 5 4 3 2 1 MINUTE PLUS G10 0 9 8 7 6 FRESH STEAKS VEGETABLES CHOPS G11 FROZEN POWER ENTREES LEVEL G12 KEEP WARM RICE STOP CLEAR TIMER POPCORN START CLOCK BAKED POTATOES G1 CHICKEN PIECES REHEAT GROUND CENTER MEAT FROZEN VEGETABLES GROUND MEAT G13 G14 K RELAY TEST 1. 2. 3. 4. 5. Disconnect the power supply cord, and then remove outer case. Open the door and block it open.
R-310FK R-310FW TEST PROCEDURES PROCEDURE LETTER M COMPONENT TEST 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. 3) Discharge high voltage capacitor. 4) Follow the troubleshooting guide given below for repair.
R- 310 FK R-310FW 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 CPU Unit).
R-310FK R-310FW 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- 310 FK R-310FW Pin No. Signal I/O Description 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. A pulse signal is input to P41, P43, P44 and P45 terminal while one of G6 line keys on key matrix is touched. 36 P24 OUT Key strobe signal. Signal applied to touch-key section.
R-310FK R-310FW TOUCH CONTROL PANEL SERVICING 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. 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- 310 FK R-310FW 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-310FK R-310FW 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. POWER TRANSFORMER REMOVAL Reinstallation 1. Rest transformer on the bottom plate with its primary terminals toward the oven face plate. 2. Secure transformer with four screws to bottom plate. 3.
R- 310 FK R-310FW 4. Reconnect the wire leads to the magnetron and thermal cut-out (MG). Refer to "PICTORIAL DIAGRAM" on page 28. 5. Reinstall outer case and check that the oven is operating properly. CAUTION: WHEN REPLACING MAGNETRON, BE SURE THE R.F. GASKET IS IN PLACE AND MOUNTING SCREWS ARE TIGHTENED SECURELY. Reinstallation 1. Reinstall the magnetron to waveguide flange with the four (4) screws. 2. Insert the two (2) tabs of the chassis support to the oven cavity front plate and the back plate. 3.
R-310FK R-310FW INSTALLATION 1. Install the fan motor to the fan duct with the two (2) screws. 2. Install the fan blade to the fan motor shaft according to the following procedure. 3. Hold the center of the bracket which supports the shaft of the fan motor on the flat table. 4. Apply the screw lock tight into the hole (for shaft) of the fan blade. 5. Install the fan blade to the shaft of fan motor by pushing the fan blade with a small, light weight, ball peen hammer or rubber mallet.
R- 310 FK R-310FW hook, pushing and pulling lower portion of the door toward the oven face. Both results (play in the door) should be less than 0.5mm. 2. The contacts of door sensing switch and secondary interlock switch open within 1.5mm gap between right side of cavity face plate and door when door is open. 3. Monitor switch contacts close when door is opened. 4. Reinstall outer case and check for microwave leakage around door with an approved microwave survey meter.
R-310FK R-310FW 3. Door is positioned with its face pressed toward cavity face plate. 4. Check for microwave leakage around door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.) 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.
1 H 2 3 28 2 4 CN-A (POWER UNIT) 1 T1 RY2 YLW BLK RED RED CN-A 1 WHT 2 N.C. 5 COM. WHT WHT GRY RED GRY BLK BLK POWER TRANSFORMER MAGNETRON HIGH VOLTAGE CAPACITOR HIGH VOLTAGE COMPONENTS THERMAL CUT-OUT (MG) 5 Figure S-1. Pictorial Diagram TURNTABLE MOTOR BLK C WHT BLK MONITOR FUSE & HOLDER BLK FAN MOTOR WHT GRY BLK BLK NOTE: The neutral (WHT) wire must be connected to the terminal with "N" mark on the power supply cord.
R-310FK R-310FW 2 1 4 3 6 5 A A B B C9 T1 CN-A d a 4 1 b 7 + D1 S1NB10 C3 C1 1000µ/25v A2 C CN-C 9PIN LEAD WIRE HARNESS GND 10G471K 3 A1 VRS1 AC INT – GND C VR SP1 (J1) C5 D D c OVEN LAMP TURNTABLE MOTOR FAN MOTOR AC RY1 COM C4 BUZZER NO C6 OVEN LAMP TURNTABLE MOTOR FAN MOTOR NO C8 MICRO COM C7 NC SH-A C2 NC SH-B C1 DOOR SENSING SWITCH E RY2 MICRO F DOOR SENSING SWITCH E F G G H H Figure S-2.
4 C-2 C-4 C-9 DOOR SENSING SWITCH MICRO C1 0.1µ/50v R4 560 1/2w – + Q22 DTA123JKA Q21 DTD143EKA : IF NOT SPECIFIED 1/10W ± 5% D40 MA152WA D20 MA152WA NOTE C-1 C-8 C-7 OVEN LAMP TURNTABLE C-6 MOTOR FAN MOTOR NC BUZZER INT C-5 C21 VR R2 4.7k – C20 0.1µ/50v Q30 DTA143EKA Q10 DTA143EKA R41 15k Q20 DTA143EKA Q1 2SA1037AK C10 0.
R-310FK R-310FW 2 1 4 3 5 6 A A 1 1 SH - B 2 SH - A B DIP VH CN - B B 9 CN - C C C D1 C1 SP1 (D2) (D3) RY2 D D OM DU OM RY1 DU E E 7 (J1) 1 S P F F XA 4 T1 2 G 3 VRS1 VH 1 G CN - A H H Figure S-4.
R- 310 FK R-310FW 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-310FK R-310FW REF. NO. 4-14 4-15 4-16 4-17 4-18 4-19 4-20 4-21 4-22 PART NO.
R- 310 FK R-310FW 2 1 4 3 7-6 2-1 OVEN AND CABINET PARTS 6 5 7-8 A A 7-6 4-22 4-9 B 7-10 4-17 7-8 B 4-20 1-4 6-7 7-6 1-8 4-13 7-7 4-11 C C 6-6 4-7 7-6 4-10 7-3 4-21 1-5 7-6 D D 7-4 4-19 4-22 7-1 4-12 1-7 4-21 1-6 4-15 E 7-9 7-6 7-2 1-1 E 1-13 4-14 6-2 4-4 4-2 4-18 1-12 4-8 7-6 1-3 1-2 4-5 F 7-1 6-1 1-10 4-3 7-6 7-3 1-1 F 7-5 7-1 2-2 4-1 4-6 4-16 1-11 1-9 G G 7-1 7-6 7-6 H H 7-6 7-6 2-3 1 2 4 3 34 5 6
R-310FK R-310FW 2 1 4 3 CONTROL PANEL PARTS 6 5 3-2 A A 3-6 3-5 3-3 3-4 3-6 B B 3-1 DOOR PARTS 5-11 3-3-1 C C 5-7 5-2 5-7 D D 5-1 5-10 5-9 5-7 5-7 5-3 E E 5-7 5-10 5-9 5-5 F 5-4 F 5-6 5-8 G G 6-3 MISCELLANEOUS 6-5 H H Actual wire harness may be different from illustration.
R- 310 FK R-310FW 1 2 4 3 6 5 A A TOP PAD ASSEMBLY FPADBA458WRKZ PACKING AND ACCESSORIES DOOR PROTECTION SHEET CABINET COVER SPADPA204WRE0 SPAKHA011WRE0 (only for R-310FK) PLASTIC BAG B B SSAKHA034WRE0 FOAM SHEET SPAKHA012WREZ (only for R-310FK) 6- 4 INSTRUCTION BOOK & PRINTING MATTER C C 6- 2 BOTTOM PAD ASSEMBLY TURNTABLE TRAY FPADBA469WRKZ 6- 1 TURNTABLE SUPPORT TRAY PACK INTO THE OVEN CAVITY SPADFA451WRE0 D D Not replaceable items.
R-310FK R-310FW 37
R- 310 FK R-310FW COPYRIGHT © 2002 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. 2002 SHARP CORP. (1S1.700E) 38 Printed in U.S.