Sharp R-64ST Service Manual
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Sharp R-64ST Service Manual

Sharp R-64ST Service Manual

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See also: Operation Manual With Cookbook
CAUTION, MICROWAVE RADIATION .................................................................................................... 2
GENERAL INFORMATION ....................................................................................................................... 3
SERVICING .............................................................................................................................................. 4
PRODUCT SPECIFICATIONS ................................................................................................................. 7
APPEARANCE VIEW .............................................................................................................................. 8
OPERATION SEQUENCE ........................................................................................................................ 9
FUNCTION OF IMPORTANT COMPONENTS ..................................................................................... 10
TROUBLESHOOTING GUIDE ............................................................................................................... 11
TEST PROCEDURE .............................................................................................................................. 13
CONTROL PANEL ASSEMBLY ............................................................................................................ 21
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................... 25
MICROWAVE MEASUREMENT ........................................................................................................... 30
TEST DATA AT A GLANCE/WIRING/REWIRING .................................................................................. 31
SCHEMATIC DIAGRAMS ....................................................................................................................... 32
PICTORIAL DIAGRAM .......................................................................................................................... 34
CONTROL PANEL CIRCUIT DIAGRAM ................................................................................................ 35
SWITCH UNIT CIRCUIT DIAGRAM ....................................................................................................... 36
PRINTED WIRING BOARD DIAGRAM .................................................................................................. 37
PRINTED WIRING BOARD OF SWITCH UNIT DIAGRAM .................................................................... 38
PARTS LIST ........................................................................................................................................... 39
EXPLODED DIAGRAM OF OVEN PARTS ............................................................................................ 42
CONTROL PANEL/DOOR PARTS ......................................................................................................... 43
MISCELLANEOUS/PACKING & ACCESSORIES .................................................................................. 44
R64ST_S.MANUAL
1
SERVICE MANUAL
MICROWAVE OVEN AND GRILL
MODEL
In interests of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.

TABLE OF CONTENTS

SHARP CORPORATION
R-64ST - 1
S71103R64EHW
R-64ST
12/8/01, 11:00 am
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Summary of Contents for Sharp R-64ST

  • Page 1: Table Of Contents

    PRINTED WIRING BOARD DIAGRAM ....................37 PRINTED WIRING BOARD OF SWITCH UNIT DIAGRAM ..............38 PARTS LIST ............................39 EXPLODED DIAGRAM OF OVEN PARTS .................... 42 CONTROL PANEL/DOOR PARTS ......................43 MISCELLANEOUS/PACKING & ACCESSORIES .................. 44 SHARP CORPORATION R-64ST - 1 R64ST_S.MANUAL 12/8/01, 11:00 am...

  • Page 2: Caution Microwave Radiation

    Alle mikrobølgeindgange og-udgange, bølgeledere, flanger og tætningsstrimler må være forsvarligt udført. Anvend aldrig ovnen uden en mikrobølgeabsorberende anordning. Se aldrig ind i en åben bølgeleder eller antenne, mens ovnen er i brug. R-64ST - 2 R64ST_S.MANUAL 12/8/01, 11:00 am...

  • Page 3: General Information

    R-64ST GENERAL IMPORTANT INFORMATION This Manual has been prepared to provide Sharp Corp. Service engineers with Operation and Service Information. It is recommended that service engineers carefully study the entire text of this manual, so they will be qualified to render satisfactory customer service.

  • Page 4: Servicing

    Wanneer de twee minuten voorbij zijn (klok staat op nul), controleert u voorzichtig of het water heet is. Indien het Sharp beveelt ten sterkste aan dat, voor zover mogelijk, defecten water nog steeds koud is, herhaalt u de allereerste drie...
  • Page 5 är varmt. Om vattnet fortfarande är kallt utför Du 3 steg kontroller och kontrollerar anslutningarna till varje Sharp rekommenderar att felsökning sker med strömmen enskild komponent på nytt. fränkopplad. Ibland kan det var nödvändigt att koppla på...
  • Page 6 è rimasta fredda, eseguire i tre controlli iniziali e verificare nuovamente i collegamenti del componente in Sharp raccomanda, nei limiti del possibile, che la ricerca questione. dei guasti avvenga in assenza di alimentazione elettrica. In alcuni casi tuttavia, può essere necessario alimentare Dopo aver portato a termine le operazioni di manutenzione l'apparecchio dopo aver rimosso la scatola esterna.

  • Page 7: Product Specifications

    MEDIUM LOW ........approx. 30% of FULL Power LOW ............approx. 10% of FULL Power EXPRESS DEFROST Button EXPRESS COOK button STOP Button +1 min/START button COOKING MODE button TIMER/WEIGHT/POWER knob Net Weight Approx. 14 kg R-64ST - 7 R64ST_S.MANUAL 12/8/01, 11:00 am...

  • Page 8: Appearance View

    2. Then place the turntable on roller stay. Digital Display Symbols and Indicators EXPRESS DEFROST button EXPRESS COOK button STOP button +1 min/START button COOKING MODE button TIMER/WEIGHT/POWER knob R-64ST - 8 R64ST_S.MANUAL 12/8/01, 11:00 am...

  • Page 9: Operation Sequence

    3. The relay RY2 is energized and the grill heating the relay RY1 stays closed. Shown in the display is elements are energized. remaining time. 4. Now, the food is grilled by the grill heating elements. R-64ST - 9 R64ST_S.MANUAL 12/8/01, 11:00 am...

  • Page 10: Function Of Important Components

    It is then MONITOR SWITCH (SW2) FOR exhausted through the exhausting air vents at the oven PROPER OPERATION. (REFER TO CHAP- TER “TEST PROCEDURE”). cavity. R-64ST - 10 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 11: Troubleshooting Guide

    Oven does not seem to be operating properly during variable cooking con- dition. (Oven operates properly at HIGH) Grill heating element does not heat. GRILL COOKING (Oven seems to be operating.) CONDITION COMBI-GRILL COOKING Fuse F8A blows CONDITION R-64ST - 11 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 12 TROUBLESHOOTING GUIDE R-64ST - 12 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 13: Test Procedure

    8. “t” is measured while the microwave generator is operating at full power. Magnetron filament heat- up time is not included. NOTE: The operation time of the microwave oven is “t + 3” sec. (3 sec. is magnetron filament heat-up time.) Therefore total heating time = 55 sec. R-64ST - 13 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 14: Test Procedures

    142 ohms c. Filament winding less than 1 ohm If the readings obtained are not stated as above, then the high voltage transformer is probably faulty and should be replaced. CARRY OUT 4R CHECKS. R-64ST - 14 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 15 Released O.C. S.C. Normally close terminal Depressed S.C. O.C. S.C.; Short circuit O.C.; Open circuit If incorrect readings are obtained, make the necessary switch adjustment or replace the switch. CARRY OUT 4R CHECKS. R-64ST - 15 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 16 Between N and L Approx. 680 kΩ Between terminal N and WHITE Short circuit Between terminal L and RED Short circuit If incorrect readings are absorbed, replace the noise filter unit. CARRY OUT 4R CHECKS. R-64ST - 16 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 17 10 MΩ in the cold start. If the results of above test 1 and/or 2 are out of above specifications, the heating element is probably faulty and should be replaced. CARRY OUT 4R CHECKS. CARRY OUT 3D CHECKS. R-64ST - 17 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 18 5. When the tact switch is not depressed, an ohmmeter should indicate an open circuit. When the tact switch is depressed, an ohmmeter should indicate a short circuit. If improper operation is indicated, the tact switch is probably defective and should be checked. R-64ST - 18 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 19 RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS Approx. 24.0V D.C. Oven lamp / Turntable motor / Cooling fan motor Approx. 18.0V D.C. Heating element Approx. 18.0V D.C. High voltage transformer R-64ST - 19 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 20 (check primary coil resistance). If any abnormal condition is detected, re- place the defective parts. OL / FM CARRY OUT 4R CHECKS. / TTM CN - A R-64ST - 20 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 21: Control Panel Assembly

    This circuit generates voltage necessary in the control the pulse signal, and the pulse signal is returned to the unite. LSI. Symbol Voltage Application 10) Back Light Circuit LSI(IC1) A circuit to drive the back light (Light emitting diodes LED1-LED4) R-64ST - 21 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 22: Description Of Lsi

    L: 0V Grill heating element driving signal. During To turn on and off the grill heating cooking element relay (RY2). "L" level during grill (Grill or dual) cooking or dual cooking; "H" level otherwise. R-64ST - 22 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 23 SEG 10 (11) ....S2(14) SEG 5 (6) ......S7(9) SEG 11 (12) ....S1(15) 55-57 SEG12- Terminal not used. SEG14 Power source voltage input terminal. Connected to GND. 59-64 SEG15- Terminal not used. SEG20 R-64ST - 23 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 24 A. On some models, the power supply cord be- tween 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 R-64ST - 24 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 25: Component Replacement And Adjustment Procedure

    3. Lift up the oven lamp by releasing the two (2) tabs of 1. CARRY OUT 3D CHECKS the air intake duct. 2. Disconnect the wire leads from the oven lamp. 4. Now, the oven lamp is free. R-64ST - 25 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 26 Groove joint pliers Center of Shaft Table These are the position bracket Axis where should be pinched Stator with pliers Stator Rotor Bracket Rotor Rear view Side view Figure C-1 Fan motor replacement R-64ST - 26 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 27 Removal Re-install 1. Disconnect the oven from the power supply. 1. Remove the any sharp edges on the turntable motor 2. Remove the turntable and roller stay from the oven cover and the base plate with the cutting pliers. cavity.
  • Page 28 7. Remove the switch(s) from the latch hook by pushing the retaining tab backwards slightly and turning the SW2: Monitor switch switch(s) on the post. 8. Now, the switch(s) is free. SW1: Monitored latch switch Figure C-5 Switches R-64ST - 28 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 29 (Refer to chapter “Test Procedures”.). Finger tab (B) An approved microwave survey meter should be used to assure compliance with proper micro- wave radiation emission limitation standards. Figure C-6. Inner Sealer Film R-64ST - 29 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 30: Microwave Measurement

    6. The microwave radiation emission should be meas- testing. ured at any point of 5cm or more from the external surface of the oven. mW cm mW cm Microwave leakage measurement at 5 cm distance R-64ST - 30 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 31: Test Data At A Glance/Wiring/Rewiring

    (Fan blade, any motor, switch, switch lever and open button) Positive lock connectors are fitted correctly. Ensure the locking pin is located correctly. Wires are connected correctly as per pictorial diagram. No wire leads are trapped by the outer wrap. R-64ST - 31 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 32: Schematic Diagrams

    G-Y : GREEN AND YELLOW STRIPE /18 : SECTIONAL AREA OF 1.5mm MIN. 3. MICROWAVE PAD TOUCHED ONCE. Indicates components with potential 4. START KEY TOUCHED. above 250 V. Figure O-2 Oven Schematic-Microwave Cooking Condition R-64ST - 32 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 33 G-Y : GREEN AND YELLOW STRIPE /18 : SECTIONAL AREA OF 1 .5mm MIN. 3. COMBI GRILL KEY TOUCHED. Indicates components with potential 3. START KEY TOUCHED. above 250 V. Figure O-4 Oven Schematic-Dual Cooking Condition R-64ST - 33 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 34: Pictorial Diagram

    PICTORIAL DIAGRAM R-64ST - 34 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 35: Control Panel Circuit Diagram

    CONTROL PANEL CIRCUIT DIAGRAM R-64ST - 35 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 36: Switch Unit Circuit Diagram

    SWITCH UNIT CIRCUIT DIAGRAM CN-G Figure S-3. Switch unit circuit R-64ST - 36 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 37: Printed Wiring Board Diagram

    PRINTED WIRING DIAGRAM QKITPA018URE0 WH-2 (J3) (J5) (J7) (J8) CN - B (J10) MICRO VRS1 OL/FM /TTM CN - A Figure S-4. Printed Wiring Board R-64ST - 37 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 38: Printed Wiring Board Of Switch Unit Diagram

    PRINTED WIRING BOARD OF SWITCH UNIT DIAGRAM Figure S-4. Printed Wiring Board of Switch R-64ST - 38 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 39: Parts List

    240 ohm 1/4W VRD-B12EF472J Resistor 4.7k ohm 1/4W VRD-B12EF102J Resistor 1.0k ohm 1/4W VRD-B12EF472J Resistor 4.7k ohm 1/4W VRD-B12HA910J Resistor 91 ohm 1/2W VRD-B12EF153J Resistor 15k ohm 1/4W VRD-B12EF472J Resistor 4.7k ohm 1/4W R-64ST - 39 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 40 Latch head MSPRTA141WRE0 Latch spring PSHEPA482WRE0 Inner Sealer film LSTPPA020URF1 Glass stopper XEBSD30P06000 Door Frame screw 5-10 JHNDPS002URT0 Handle painted 5-11 XEPSD30P10XS0 Handle/glass stopper screw 5-12 HDECQS002URP0 Door decoration (SUS) 5-13 GCOVHA366WRF0 Choke cover R-64ST - 40 R64ST_S.MANUAL 12/8/01, 11:01 am...
  • Page 41 8-11 PCLI-A009URE0 Harness clip HOW TO ORDER REPLACEMENT PARTS To have your order filled promptly and correctly, please furnish the following information. 1. MODEL NUMBER 2. REF. NO. 3. PART NO. 4. DESCRIPTION R-64ST - 41 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 42: Exploded Diagram Of Oven Parts

    1-16 1-15 4-10 6-11 1-13 1-11 1-14 7-10 1-17 8-11 1-18 4-11 4-12 NOTE: In the event of removing the turntable motor cover this part should be refitted using screw connection: LX-CZA030WRE0 (7-11) R-64ST - 42 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 43: Control Panel/Door Parts

    3 - 9 3 - 3 3 - 8 3 - 5 3 - 8 3 - 4 3 - 7 3 - 2 3 - 6 DOOR PARTS 5-13 5-11 5-12 5-10 R-64ST - 43 R64ST_S.MANUAL 12/8/01, 11:01 am...

  • Page 44: Miscellaneous/Packing & Accessories

    MISCELLANEOUS/PACKING & ACCESSORIES MISCELLANEOUS Actual wire harness may be different than illustration. COPYRIGHT C 2001 BY SHARP CORPORATION ALL RIGHT RESERVED. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

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