R-55TS-F SERVICE MANUAL SY517R55TSPF/ TOASTER OVEN WITH MICROWAVE MODEL R-55TS-F 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-55TS-F 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-55TS-F 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-55TS-F 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-55TS-F SERVICE MANUAL PRODUCT DESCRIPTION TOASTER OVEN WITH MICROWAVE R-55TS-F GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP TOASTER OVEN WITH MICROWAVE, R-55TS-F. 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-55TS-F SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 8.5 Amperes (Microwave)/ 10.8 Amperes (Grill and Bake) 60 Hertz / Single phase, 3 wire grounded Power Output 650 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHz Upper Heater Power Output 760 Watts Lower Heater Power Output 510 Watts Case Dimensions Width 17-3/4" Height 11-3/8" Depth 15-1/8" Cooking Cavity Dimensions Width 11-1/4" Height 5-7/8" Depth 11-5/8" 0.
R-55TS-F 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. Grounded Receptacle Box 3-Pronged Plug CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE ROUND GROUNDING PRONG FROM THIS PLUG.
R-55TS-F OPERATION DESCRIPTION OF OPERATING SEQUENCE voltage components are de-energized, the oven lamp remains on, and the digital read-out displays the time still remaining in the cook cycle when the door was opened. 7. The monitor switch electrically monitors the operation of the secondary interlock switch and primary interlock relay and is mechanically associated with the door so that it will function in the following sequence.
R-55TS-F 5-2. The oven will continue to function for 30 minutes, turning the upper heater and the lower heater on and off, as needed to maintain the selected preheat temperature. The oven will shutdown completely after 30 minutes [BAKE TIME COOKING CONDITION] UPPER HEATER MODE (GRILL1) In this mode, the food is cooked by the upper heater. Press the GRILL pad once and then enter the cooking time by rotating the rotary dial. When the START pad is pressed, the following operations occur (Figure O-3): 1.
R-55TS-F SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY NOTE: " " indicates components with potential above 250V. NOISE FILTER TEMPERATURE FUSE (MAGNETRON) MAGNETRON N.O. COM. POWER TRANSFORMER B3 A5 B5 C1 RY3 N.O. C2 DOOR SENSING SWITCH RY4 E3 MONITOR SWITCH FM CONTROL UNIT LOWER HEAER A1 RY2 PRIMARY INTERLOCK RELAY RY1 RY5 FAN MOTOR TURNTABLE MOTOR COM. UPPER HEAER LINE BYPASS CAPACITOR 0.
R-55TS-F SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. "GRILL" TOUCHED ONCE 3. COOKING TIME PROGRAMMED 4. "START" PAD TOUCHED NOISE FILTER NOTE: " " indicates components with potential above 250V. TEMPERATURE FUSE (MAGNETRON) N.O. MAGNETRON COM. B1 COM. POWER TRANSFORMER B5 C1 N.O. C2 DOOR SENSING SWITCH RY4 E3 MONITOR SWITCH B3 A5 RY3 LOWER HEAER FM CONTROL UNIT UPPER HEAER A1 RY2 PRIMARY INTERLOCK RELAY RY1 RY5 FAN MOTOR TURNTABLE MOTOR TTM LINE BYPASS CAPACITOR 0.
R-55TS-F DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM 3. If the door is opened, and the primary interlock relay (RY2) and the secondary interlock switch contact fail to 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, RELAY (RY1), PRIMARY INTERLOCK RELAY (RY2), SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. (REFER TO CHAPTER "TEST PROCEDURE").
R-55TS-F LOWER HEATER NOISE FILTER The lower heater is located under the bottom of the oven cavity assembly. The lower heater sends out heat to cook foods. The noise filter prevents the radio frequency interference that might flow back in the power unit. 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.
R-55TS-F CK = Check / RE = Replace POSSIBLE CASE AND DEFECTIVE PARTS CONDITION PROBLEM A B C D E E E F F G H I Monitor fuse blows when power cord is plugged into wall outlet. Monitor fuse blows when the door is opened. Oven lamp does not light when door is opened. (Display operates.) OFF CONDITION Home fuse blows when power cord is plugged into wall outlet. "88:88" does not appear in display when power cord is plugged into wall outlet. Display does not operate properly when STOP/CLEAR pad is pressed.
R-55TS-F 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-55TS-F TEST PROCEDURES PROCEDURE LETTER C COMPONENT TEST HIGH VOLTAGE RECTIFIER 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 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-55TS-F TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 3. Discharge high voltage capacitor. 4. A continuity check across the temperature fuse terminals should indicate a closed circuit unless the temperature of the magnetron reaches approximately 302˚F(150˚C). An open temperature fuse indicates overheating of the magnetron. Check for restricted air flow to the magnetron, especially the cooling fan and air guide. 5. Reconnect all leads removed from components during testing. 6.
R-55TS-F TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. 6. 7. 8. H are operating properly, according to the above Switch Test Procedure. Disconnect the wire lead from the monitor switch (COM) terminal. Check the monitor switch operation by using the ohmmeter as follows. When the door is open, the meter should indicate a closed circuit.
R-55TS-F TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 9. Reinstall the outer case (cabinet). 10.Reconnect the power supply cord after the outer case is installed. 11.Run the oven and check all functions. J THERMISTOR 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. Disconnect connector-C from the control unit. Measure the resistance of the thermistor with an ohmmeter.
R-55TS-F TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Before testing, 1) 2) 3) 4) 5) Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. Disconnect the leads to the primary of the power transformer. Ensure that these leads remain isolated from other components and oven chassis by using insulation tape. 1. Switch Unit. NOTE ; 1) Re-install the outer case (cabinet).
R-55TS-F 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. 13P HARNESS WH-B R50 1 R51 4.7K R52 100K R53 2 4 5 6 START/ MINUTEPLUS SW1 BAKE Switch Unit 7 STOP/ CLEAR SW2 TIMER/ CLOCK SW6 REHEAT SW5 100K SW1 A B C ENCODER O 3 4.
R-55TS-F TEST PROCEDURES 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-55TS-F TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL 3) Synchronizing Signal Circuit The power source synchronizing signal is available in order to compose a basic standard time in the clock circuit. It accompanies a very small error because it works on commercial frequency. The touch control section consists of the following units as shown in the touch control panel circuit.
R-55TS-F DESCRIPTION OF LSI LSI The I/O signal of the LSI is detailed in the following table. Pin No. Signal I/O Description 1-2 VL2-VL1 IN Power source voltage input terminal. Standard voltage for LCD. 3-5 AN7-AN5 IN Terminal to change functions according to the model. DC voltage in accordance with the model in operation is applied to set up its function. 6 AN4 OUT Terminal not used. 7 AN3 IN Terminal not used.
R-55TS-F Pin No. Signal I/O Description 18 P50 OUT Lower heater driving signal. To turn on and off the lower heater relay (RY4). “L” level during GRILL2 cooking or Bake cooking. “H” level otherwise. OFF H : GND L ON (During Grill2 or Bake cooking) 19-20 P47-P46 OUT Terminal not used. 21 P45 OUT Terminal not used. 22 P44 OUT Terminal not used. 23 INT1 IN Signal coming from encoder. When the encoder is turned, the contacts of encoder make plus signals.
R-55TS-F Pin No. Signal I/O Description 43 P15 OUT Tact switch strobe signal. Signal applied to tact switch section. A pulse signal is input to P24 - P27 terminal while one of tact swithes (SW9, SW10. SW11, SW12) on matrix is touched. 44 P14 OUT Tact switch strobe signal. Signal applied to tact switch section. A pulse signal is input to P24 - P27 terminal while one of tact swithes (SW13, SW14. SW15) on matrix is touched. 45-48 P13-P10 IN Terminal not used.
R-55TS-F 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-55TS-F PRECAUTIONS FOR USING LEAD-FREE SOLDER 1. Employing lead-free solder The "Main PWB" of this model employs lead-free solder. This is indicated by the "LF" symbol printed on the PWB and in the service manual. The suffix letter indicates the alloy type of the solder. Example: Sn-Ag-Cu Indicates lead-free solder of tin, silver and copper. 2. Using lead-free wire solder When repairing a PWB with the "LF" symbol, only lead-free solder should be used.
R-55TS-F 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-55TS-F 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 Reinstallation 1. Rest transformer on the bottom plate with its primary terminals toward the oven face plate. 2.
R-55TS-F 2. Reinstall the air duct to the magnetron with the two (2) screws. 3. Reinstall the magnetron to the waveguide flange with the three (3) screws. 4. Reinstall the thermistor angle to the magnetron with the one (1) screw. 5. Reinstall the temperature fuse (magnetron) to the air duct with the one (1) screw. 6. Reinstall the snap band of the main wire harness to the air duct. 7. Reinstall the chassis support to the oven cavity front flange and the bottom plate assembly with the two (2) screws. 8.
R-55TS-F 4. Remove the two (2) screws holding the main wire harness to the upper heater. 5. Remove the one (1) screw holding the heater fix angle left to the oven cavity top plate. 6. Carefully remove the upper heater from the oven cavity top plate so that the right of the upper heater catch any metal object. 7. Now, the upper heater is free. LOWER HEATER REMOVAL 1. Disconnect the power supply cord and then remove the outer case. 2. Open the oven door and block it open. 3.
R-55TS-F 6. Remove the fan blade from the fan motor shaft according to the following procedure. 7. Hold the edge of the rotor of the fan motor by using a pair of groove joint pliers. CAUTION: * Make sure that no metal pieces enter the gap between the rotor and the stator of the fan motor because the rotor is easily shaven by pliers and metal pieces may be produced. * Do not touch the pliers to the coil of the fan motor because the coil may be cut or injured.
R-55TS-F should be less than 0.5mm. 2. The door sensing switch and secondary interlock switch interrupt the circuit before the door can be 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. (Refer to Microwave Measurement Procedure.) misadjustment, the following adjustment should be made. 4. Loosen the two (2) screws holding latch hook to the oven cavity front flange. 5.
R-55TS-F the door frame. 6. Reinstall the door panel to the door frame by fitting eight (8) tabs of the door frame. 7. Put the sealer film on the door panel. Refer to “Sealer Film” about how to handle new one. 8. Catch the two (2) pins of door panel on two (2) hole of the upper and lower oven hinges. 9. Reinstall the choke cover to the door panel by pushing. 10.Reinstall the door stopper.
2 RED 12 1 3 34 H RY4 1 4 5 RY3 T1 RY1 C2 5 1 RED 2 3 BRN 4 5 WHT CN-A 1 GRN 3 BLK 2 CN-B 1 BLK 2 BLK CN-C BRN BLK BRN RED BLK RED RED GRN N.C. COM. BLU WHT WHT BLU WHT WHT MONITOR SWITCH COM. RED BLK GRN GRN SECONDARY NO INTERLOCK SWITCH COM. N.O. DOOR SENSING SWITCH WHT WHT RED RED TURNTABLE MOTOR LOWER HEATER RED BLK OVEN LAMP THERMAL CUT-OUT Figure S-1.
4 N.O. N.O. N.O. COM DOOR SENSING SW CN-B B3 B2 B1 N.O. POWER TRANSFORMER UPPER HEATER COM OVEN LAMP TURENTABLE MOTOR COM LOWER HEATER COM A1 A5 10G471K RY5 D25 NOTE DU24D1-1P(R)M RY2 DU24D1-1P(R)M RY3 5 D4 Q26 KRA101M D30 :check point :IF NOT SPECIFIED 0.01uF/16V :IF NOT SPECIFIED 1SS270A C2 D80 C20 VR 50V/ 470u or 330u KRA101M 0.1u 50V Q21 D81 D82 Q25 KRA101M KRA101M Q23 KRC243M Q22 Q24 C1 50V/ 01.u Q2 KRA101M KRA101M 50V/0.
R-55TS-F 2 1 4 3 6 5 A A SWITCH UNIT WH-AA LCD1 11 R7 13 C7 B Q21 R10 E 25 + J8 Q22 _ E 31 D22 3 E Q3 J9 D21 R21 E B RY1 D23 R9 RY3 R20 RY4 SW5 C6 B Q80 _ E B C21 RY2 WH-B 1 SW12 REHEAT Sn-Ag-Cu SW7 C53 C52 7 R70 6 GRILL SW5 26 32 C62 MICRO C D Q23 12 BAKE C63 R71 SW9 SW11 B 30 5 SW10 D81 B B D80 B E Q24 4 D C4 R4 29 28 R41 WH-B 4 Q25 27 R12 J80 E R5 E ZD1 + C5 DCUT Q'TY/TIME 20 21 22 D82 23 Q81 C60 R68 SW1A Q1 Q4 24 R3
R-55TS-F PARTS LIST Note: The parts marked “∆” may cause undue microwave exposure. The parts marked “*” are used in voltage more than 250V. The price codes marked "@" have been changed due to changing production to SATL. REF. NO. PART NO.
R-55TS-F REF. NO. 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 PART NO.
R-55TS-F 2 1 4 3 OVEN AND CABINET PARTS 7-19 x2 A 7-11 2-3 7-5 7-19 x2 4-14 A 6 5 4-37 7-19 x2 6-7 4-32 4-29 B 7-1 7-14 4-31 7-19 B x2 6-6 7-11 7-19 1-16 4-26 7-4 1-2 6-8 4-12 1-17 1-15 7-1 7-5 C 7-18 1-14 7-15 4-27 7-16 4-25 C 4-39 7-14 4-23 4-6 7-3 7-21 4-18 4-34 D 7-14 4-30 4-15 1-7 7-10 E 6-4 7-19 4-1 7-8 7-3 1-1 7-19 1-1 1-13 4-35 x3 4-20 E 4-19 1-18 1-2 4-3 4-17 4-13 7-14 4-4 7-3 1-3 7-9 D 1-11 1-10 7-8 7-7 7-19 7-5
R-55TS-F 2 1 4 3 5 6 CONTROL PANEL PARTS 3-1 A 3-7 3-5 3-3 A 3-8 3-9 B B 3-9 DOOR PARTS C C 3-2 4-21 5 3-4 D 5-1 5-7 3-6 D 5-3 E E 5-7 5-4 5-6 F F 5-2 5-5 MISCELLANEOUS G G 5-8 6-5 Actual wire harness may be different from illustration.
R-55TS-F PACKING AND ACCESSORIES TRAY PROTECT (SPADPA642WREZ) 6-4 TURNTABLE 6-1 TURNTABLE SUPPORT TRAY PAD ASSEMBLY (SPADFA598WREZ) WRAP COVER (SSAKHA014WREZ) WRAP COVER (SSAKHA087WREZ) CABINET COVER (SPADPA632WREZ) 6-2 OPERATION MANUAL 6-3 MENU LABEL (inside operation manual) PAD ASSEMBLY (CPADBA327WRKZ) Not replaceable items.
R-55TS-F COPYRIGHT © 2005 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. 2005 SHARP CORP. (12S1.695E) Printed in U.S.
