Sharp SMC1585BSA Service Manual
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Sharp SMC1585BSA Service Manual

Convection microwave oven
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*FOR SERIAL NUMBERS* : SMC1585BSA --> 505011 - AND ABOVE
*Units with Serial Number range (REMARK RED LETTER)
employ a change to the connectors on
various Components, Harnesses and PWB's.*
BEFORE SERVICING ........................................................................... . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL .........................................................................................................................
MICROWAVE MEASUREMENT PROCEDURE ............................................................................................................
FOREWORD AND WARNING ........................................................................................................................................
PRODUCT SPECIFICATIONS .......................................................................................................................................
GENERAL INFORMATION ............................................................................................................................................
OPERATION ...................................................................................................................................................................
TROUBLESHOOTING GUIDE .......................................................................................................................................
TEST PROCEDURE .......................................................................................................................................................
TOUCH CONTROL PANEL ............................................................................................................................................
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ....................................................................31
PICTORIAL DIAGRAM ...................................................................................................................................................
CONTROL PANEL CIRCUIT ..........................................................................................................................................
PRINTED WIRING BOARD ............................................................................................................................................
PARTS LIST ...................................................................................................................................................................
PACKING AND ACCESSORIES ....................................................................................................................................
SHARP CORPORATION
SERVICE MANUAL
SMC1585BBA --> 503501 - AND ABOVE
SMC1585BWA --> 501901 - AND ABOVE
SMC1585BS

TABLE OF CONTENTS

CONVECTION
MICROWAVE OVEN
SMC1585BSA
SMC1585BBA
MODEL
SMC1585BWA
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. (High Voltage Capacitor, High Voltage Power
Transformer, Magnetron, High Voltage Rectifier Assembly, High
Voltage Harness etc..)
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
SMC1585BSA
SMC1585BBA
SMC1585BWA
S5608SMC1585B
Page
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.... . . . 2
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..................... . 4
........................ . 4
...................................6
.................... . 12
........................... . 14
..................... . . 24
..............................38
........................ 39
......................... 40
.......................................41
................... . 44

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  • Page 1: Table Of Contents

    SMC1585BSA SMC1585BBA SMC1585BWA SERVICE MANUAL S5608SMC1585B *FOR SERIAL NUMBERS* : SMC1585BSA --> 505011 - AND ABOVE SMC1585BBA --> 503501 - AND ABOVE CONVECTION SMC1585BWA --> 501901 - AND ABOVE MICROWAVE OVEN SMC1585BSA SMC1585BBA MODEL SMC1585BWA SMC1585BS 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.

  • Page 2: Precautions To Be Observed Before And During Service To Avoid Possible Exposure To Excessive Microwave Energy

    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 @1-800-237-4277. If the unit operates with the door open, service person should 1) tell the user not to operate the oven and 2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administration's Center for Devices and Radiological Health immediately.

  • Page 3: Warning To Service Personnel

    SMC1585BSA SMC1585BBA SMC1585BWA WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of pro- ducing 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 Trans- former, Magnetron, High Voltage Rectifier Assem- bly, High Voltage Harness etc..
  • Page 4 SMC1585BSA SMC1585BBA SMC1585BWA MICROWAVE MEASUREMENT PROCEDURE (CANADA) After adjustment of the door switches are completed individually or collectively, switch test and microwave leakage test must be performed with survey instrument and test result must be confirmed to meet the requirement of the performance standard for microwave ovens as undermentioned.

  • Page 5: Microwave Measurement Procedure

    SMC1585BSA SMC1585BBA SMC1585BWA 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/cm at any point 5cm or more from the external surface of the oven, measured prior to acquisition by a...
  • Page 6 SMC1585BB SMC1585BW FOREWORD OPERATION This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP CONVECTION MICROWAVE OVEN , SMC1585B# TROUBLESHOOTING GUIDE It is recommended that service personnel carefully study the entire text of...

  • Page 7: General Information

    SMC1585BSA SMC1585BBA SMC1585BWA SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts USA / 117 Volts Canadian 13.0 Amperes (Microwave) / 13.0 Amperes (Convection) 60 Hertz / Single phase, 3 wire grounded Power Output 900 watts (IEC 705 Test Procedure) Operating frequency of 2450MHz...
  • Page 8 SMC1585BSA SMC1585BBA SMC1585BWA Electrical Requirements The electrical requirements are a 115 -120 volt 60 Hz, AC only, Grounded 3-Pronged Plug Receptacle Box 15 or 20 amp. fused electrical supply. It is recommended that a separate circuit serving only this appliance be provided. When installing this appli- ance, observe all applicable codes and ordinances.

  • Page 9: Operation

    (Figure O-1). switch contacts first open, and then the contacts of the primary interlock relay and the secondary interlock switch 1. The display will show "SHARP SIMPLY THE BEST PRESS close. CLEAR AND PRESS CLOCK".
  • Page 10 SMC1585BSA SMC1585BBA SMC1585BWA 4. When the oven temperature reaches the selected preheat 6-2. The heating element operates through the heater relay temperature, the following operations occur: (RY3) contacts and the power transformer operates 4-1 The heater relay is de-energized by the control unit through the primary interlock relay (RY2) contacts.
  • Page 11 SMC1585BSA SMC1585BBA SMC1585BWA FIRE SENSING FEATURE (MICROWAVE MODE) Cooking Sequence. 1. Touch SENSOR COOK pad. This model incorporates a sensing feature which will stop the NOTE: The oven should not be operated on SENSOR oven's operation if there is a fire in the oven cavity during COOK immediately after plugging in the unit.
  • Page 12 SMC1585BSA SMC1585BBA SMC1585BWA SCHEMATIC DIAGRAM NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CLOCK APPEARS ON DISPLAY. SW unit (15Vdc) #3(L) #1(+) #1(N) MAGNETRON OVEN #2(-) CONV. NOISE FILTER THERMAL THERMAL THERMAL CUT-OUT CUT-OUT CUT-OUT N.O. (RY1) COM. (RY1) POWER...
  • Page 13 SMC1585BSA SMC1585BBA SMC1585BWA SCHEMATIC 1. DOOR CLOSED. 2. MIX COOKING PAD TOUCHED. 3. COOKING TIME PROGRAMMED. 4. “START” PAD TOUCHED. 5. RY2 AND RY3 WILL ALTERNATELY CLOSE. DURING COOK CYCLE. MAGNETRON CONV. THERMAL TEMPERATURE NOISE FILTER CUT-OUT FUSE FUSE COM.
  • Page 14 SMC1585BSA SMC1585BBA SMC1585BWA activating both interlock switches. The primary interlock system Under normal operation, the temperature fuse remains closed. consists of the door sensing switch and primary interlock relay However, when abnormally high temperatures are reached located on the control circuit board.

  • Page 15: Troubleshooting Guide

    SMC1585BSA SMC1585BBA SMC1585BWA is channelled through the cavity to remove steam and vapors 3-3. The damper is held in the closed position during the given off from the heating foods. It is then exhausted at the top of convection cooking operation.
  • Page 16 SMC1585BSA SMC1585BBA SMC1585BWA (SENSOR CONDITION OFF CONDITION COOKING CONDITION (MICROWAVE) (CONVECTION) COOKING) POSSIBLE CAUSE DEFECTIVE PARTS MAGNETRON POWER TRANSFORMER H.V. RECTIFIER ASSEMBLY HIGH VOLTAGE CAPACITOR SECONDARY INTERLOCK SWITCH PRIMARY INTERLOCK SYSTEM MONITOR SWITCH MONITOR FUSE MAGNETRON TEMPERATURE FUSE CONV. THERMAL CUT-OUT...

  • Page 17: Test Procedure

    SMC1585BSA SMC1585BBA SMC1585BWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MAGNETRON ASSEMBLY TEST 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. 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.
  • Page 18 SMC1585BSA SMC1585BBA SMC1585BWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER HIGH VOLTAGE RECTIFIER TEST 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. 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.
  • Page 19 SMC1585BSA SMC1585BBA SMC1585BWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER PRIMARY INTERLOCK RELAY (RY2) 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 two (2) wire leads from the male tab terminals of the Primary Interlock Relay (RY2). Check the state of the relay contacts using a ohmmeter.
  • Page 20 SMC1585BSA SMC1585BBA SMC1585BWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 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 duct and cooling fan.
  • Page 21 SMC1585BSA SMC1585BBA SMC1585BWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 8. Reconnect the power supply cord after the outer case is installed. 9. Run the oven and check all functions. DAMPER MOTOR TEST When the power cord is plugged into the wall receptacle and 120 volts A.C. is supplied to the damper motor, the motor operates until the damper is opened and the damper switch closes.
  • Page 22 SMC1585BSA SMC1585BBA SMC1585BWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER NOISE FILTER TEST 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 lead wires from the terminal the noise filter. Using an...
  • Page 23 SMC1585BSA SMC1585BBA SMC1585BWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER a) When touching the pads, a certain group of pads do not produce a signal. b) When touching the pads, no pads produce a signal. 2-2 In connection with indicators a) At a certain digit, all or some segments do not light up.
  • Page 24 SMC1585BSA SMC1585BBA SMC1585BWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER Shut-off, Cook and Heater Relays Test These relays are operated by D.C. voltage Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation or convection cooking condition.
  • Page 25 SMC1585BSA SMC1585BBA SMC1585BWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 6) Reconnect all leads removed from components during testing. 7) Re-install the outer case (cabinet). 8) Reconnect the power supply cord after the outer case is installed. 9) Run the oven and check all functions.
  • Page 26 SMC1585BSA SMC1585BBA SMC1585BWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER (3) Close the door. (4) Touch SENSOR COOK pad and then touch the number pad 1. And touch Start pad. Now, the oven is in the sensor cooking condition and "BAKED POTATO" will appear in the display.

  • Page 27: Touch Control Panel

    SMC1585BSA SMC1585BBA SMC1585BWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER (18) Carry out "Water load cooking test" again and ensure that the oven works properly. Plunger Ω ± R1, R2 : 1% 1/2W Ω ± R3 : 4.3k 5% 1/4W Ω ±...
  • Page 28 SMC1585BSA SMC1585BBA SMC1585BWA DESCRIPTION OF LSI LSI(IZA797DR): The I/O signals of the LSI(IZA797DR) are detailed in the following table. Connected to GND. Anode (segment) of Fluorescent Display light-up voltage: -30V. Vp voltage of power source circuit input. AVSS Power source voltage: -5V.
  • Page 29 SMC1585BSA SMC1585BBA SMC1585BWA Magnetron high-voltage circuit driving signal. To turn on and off the cook relay(RY2). In P-90 (approx. 90% power) 30 sec. 2 sec. P-HI operation, the signals holds "L" level P-80 (approx. 80% power) 26 sec. 6 sec.
  • Page 30 SMC1585BSA SMC1585BBA SMC1585BWA Signal coming from touch key. When any one of G-1 line keys on key matrix is touched, a corresponding signal from P10 - P17 will be input into P27. When no key is touched, the signal is held at "L" level.
  • Page 31 SMC1585BSA SMC1585BBA SMC1585BWA Segment data signal. Signal similar to P23. Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-5 line keys on key matrix is touched. 49-53 P07-P03 Segment data signal.
  • Page 32 SMC1585BSA SMC1585BBA SMC1585BWA TOUCH CONTROL PANEL SERVICING 1. Precautions for Handling Electronic Components 5) Re-connect the power supply cord after the outer case is This unit uses CMOS LSI in the integral part of the circuits. installed. When handling these parts, the following precautions should 6) Run the oven and check all functions.
  • Page 33 SMC1585BSA SMC1585BBA SMC1585BWA 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.

  • Page 34: Component Replacement And Adjustment Procedure

    1. Door does not close firmly. 2. Door hinge, support or latch hook is damaged. WARNING FOR WIRING To prevent an electric shock, take the following precau- 3) Sharp edge: tions. Bottom plate, Oven cavity, Waveguide flange, Chassis 1. Before wiring, support and other metallic plate.
  • Page 35 SMC1585BSA SMC1585BBA SMC1585BWA CAUTION: 1. DISCONNECT OVEN FROM POWER SUP PLY BEFORE REMOVING OUTER CASE. 2. DISCHARGE THE HIGH VOLTAGE CAPACI- TOR BEFORE TOUCHING ANY OVEN COM- PONENTS OR WIRING. NOTE: When replacing the outer case, the 2 special Torx screws must be reinstalled in the same Special screw locations.
  • Page 36 SMC1585BSA SMC1585BBA SMC1585BWA POSITIVE LOCK CONNECTOR (NO-CASE TYPE) REMOVAL ® Terminal 1. Disconnect the power supply cord and then remove outer case. Positive lock® connector 2. Open the oven door and block it open. 3. Discharge high voltage capacitor. Push 4.
  • Page 37 SMC1585BSA SMC1585BBA SMC1585BWA (4) screws holding rear cabinet to bottom plate and three (3) take heating element out of heating element holders. screws holding to heater unit assembly and two (2) screws 12.Heating element is free. holding steam duct to top of oven cavity. Disconnect wire NOTE: After installed the heating element completely, leads from power supply cord terminals.

  • Page 38: Pictorial Diagram

    SMC1585BSA SMC1585BBA SMC1585BWA to the fan duct. CAUTION: Do not hit the fan blade strongly when installed because 21. Now, the fan motor is free. the bracket may be disfigured. INSTALLATION Make sure that the fan blade rotates smooth after 1.
  • Page 39 SMC1585BSA SMC1585BBA SMC1585BWA 5. Disconnect wire leads from each of the switches and fuse The secondary interlock switch is in the lower position and holder. the door sensing switch is in the upper position and the 6. Remove two (2) screws holding latch hook to oven flange.
  • Page 40 SMC1585BSA SMC1585BBA SMC1585BWA Note: The door on a microwave oven is designed to act as an electronic seal preventing the leakage of UPPER OVEN HINGE microwave energy from oven cavity during cook cycle. This function does not require that door be airtight, moisture (condensation)-tight or light-tight.
  • Page 41 SMC1585BSA SMC1585BBA SMC1585BWA CN101 C106 C101 C105 C202 L101 C201 C201 L201...
  • Page 42 SMC1585BSA SMC1585BBA SMC1585BWA ＋...

  • Page 43: Printed Wiring Board

    SMC1585BSA SMC1585BBA SMC1585BWA Figure S-3. Printed Wiring Board...

  • Page 44: Parts List

    SMC1585BSA SMC1585BBA SMC1585BWA PARTS LIST PART LIST  N ote: The parts marked "Δ" may cause undue microwave exposure. The parts marked "*" are used in voltage more than 250V.  R EF. NO. PART NO. DESCRIPTION Q'TY PRICE CODE...
  • Page 45 SMC1585BSA SMC1585BBA SMC1585BWA  R EF. NO. PART NO. DESCRIPTION Q'TY PRICE CODE VHIR2L388CA-1Q 80pin QFP ROM 64K 105 ℃ 50V 10uF IC10 VHIKIA78L05BP Regulator(KIA78L05BP/P) 105 ℃ 16V 47uF C2 ,C20, C233 VCEAG31HW106M VCEAG31CW476M FUSE1 QFS-GA078JBZZ 3.15A 250V VRS1 VHVS10K300E-1+...
  • Page 46 SMC1585BSA SMC1585BBA  R EF. NO. PART NO. DESCRIPTION Q'TY PRICE CODE SMC1585BWA R109 VRSCY1JF3742FN FLAT CHIP RESISTOR [37.4K, 1/10W, +/-1%] R108 VRS-CY1JF753FN FLAT CHIP RESISTOR [75K, 1/10W, +/-1%] R101 VRSCY1JF3321DN FLAT CHIP RESISTOR [3.32K, 1/10W, +/-0.5%] R102 VRSCY1JF3571DN FLAT CHIP RESISTOR [3.57K, 1/10W, +/-0.5%]...
  • Page 47 SMC1585BSA SMC1585BBA SMC1585BWA  R EF. NO. PART NO. DESCRIPTION Q'TY PRICE CODE DOOR PARTS CDORFB239WRKZ Door assembly [A3R93D0PS] CDORFB240WRKZ Door assembly [A3R93D0PK] CDORFB241WRKZ Door assembly [A3R93D0PW] 5- 1 DDORFA820WRY0 Door panel 5- 2 PGLSPA017WREZ Door glass 5- 3 GCOVHA155WRF0...

  • Page 48: Packing And Accessories

    1. MODEL NUMBER 3. PART NO. 2. REF. NO. 4. DESCRIPTION Order Parts from the authrized SHARP parts Distributor for your area. Defective parts required return should be returned as indicated in the Service Policy. PACKING AND ACCESSORIES TRAY HOLDER...
  • Page 49 SMC1585BSA SMC1585BBA SMC1585BWA OVEN AND CABINET PARTS...
  • Page 50 SMC1585BSA SMC1585BBA SMC1585BWA CONTROL PANEL PARTS 3-2-2 7-20 3-2-6 3-2-5 3-2-1 7-20 DOOR PARTS 3-2-4 3-2-3 5-12 5-13 5-11 5-11 5-11 5-10 5-11 MISCELLANEOUS Actual wire harness may be different than illustration. '06 SHARP CORP. (1S0.800E)
  • Page 51 EndPage COPYRIGHT © 2017 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in retrieval systems, or transmitted in anyform or by any means, electronic, mechanical, photocopying, re- cording, or other wise, without prior written permission...

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