Table of Contents
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This service manual covers only those items that differ from the R-933 S07283R933EHW.
For further information on items not covered by this supplement refer to the Service Manual for R-933 .
REF No
PART CODE
CH
RHET-A269WRZZ
CM
RMOTEA415WRZZ
3-2
DPWBFA191URK0
3-6
HPNLCW091URR0
3-6
HPNLCK017URR0
3-7
GMADIA042URR0
3-8
JBTN-W037URF0
3-9
JBTN-S020URR0
3-10
JBTN-W036URR0
3-11
JKNBKW021URF0
3-12
JKNBKW020URF0
4-4
DOVN-A024URK0
4-20
PPIPFA005UR10
4-21
PSKR-A013URP0
4-22
PSKR-A014URP0
4-23
PSKR-A015URP0
4-24
PSKR-A016URP0
4-28
PSKR-A012URP0
4-30
NFANMA004URP0
4-32
PDUC-A019URP0
5-1
CDORFS028URK0
5-1
CDORFW026URK0
5-1-4
JHNDPS201URT0
5-1-4
JHNDPW200URF0
5-1-10
JHNDPW205URF0
5-1-10
JHNDPK205URF0
5-1-7
PGLSPA031URR0
5-1-9
XCTSD40P20000
6-6
TINS-A315URR0
6-7
TCADCA015URR0
6-12
TINS-A318URR0
SERVICE MANUAL
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
DESCRIPTION
Convection heating element
Convection motor
CPU/LCD assy
Jog panel (R-937(W))
Jog panel (R-937(IN))
Display window(R-937(W))
More/Less button(R-937(W))
Express/Defrost button
Stop/Watt button (R-937(W))
Select knob(R-937(W))
Timer knob (R-937(W))
Cavity assy
Pipe
Air separate angle A
Air separate angle B
Air separate angle C
Air separate angle D
Air separate angle E
Convection fan
Convection duct
Door assy(R-937(IN))
Door assy(R-937(W))
Door handle (R-937(IN))
Door handle (R-937(W))
Door handle cover(R-937(W))
Door handle cover(R-937(IN))
Front door glass (R-937(W))
Screw
Operation manual
Cook book (R-937(IN)
Quick start guide
SHARP CORPORATION
R-937 - 1
SUPPLEMENT
SUPPLEMENT
MICROWAVE OVEN
GRILL AND CONVECTION
R- 937(W/IN)/(IN)F
S30333R937EHW
QTY
CODE
1
AV
1
AV
1
BL
1
AR
1
AR
1
AG
1
AD
1
AE
1
AE
1
AE
1
AE
1
BH
1
AD
1
AC
1
AC
1
AC
1
AC
1
AC
1
AE
1
AP
1
BN
1
BM
1
AW
1
AW
1
AW
1
AW
1
AX
2
AA
1
AS
1
AU
1
AM
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Table of Contents
Related Manuals for Sharp R-937
Summary of Contents for Sharp R-937
- Page 1 Door handle (R-937(IN)) 5-1-4 JHNDPW200URF0 Door handle (R-937(W)) 5-1-10 JHNDPW205URF0 Door handle cover(R-937(W)) 5-1-10 JHNDPK205URF0 Door handle cover(R-937(IN)) 5-1-7 PGLSPA031URR0 Front door glass (R-937(W)) 5-1-9 XCTSD40P20000 Screw TINS-A315URR0 Operation manual TCADCA015URR0 Cook book (R-937(IN) 6-12 TINS-A318URR0 Quick start guide SHARP CORPORATION...
- Page 2 JOG PANEL COOK DEFROST R-937 DOOR PARTS 5-1-8 5-1-1 5-1-2 5-1-3 5-1-8 5-1-5 5-1-7 5-1-6 5-1-9 5-1-10 5-1-4 R-937- 2...
- Page 3 SW11 D-CUT SW10 SW12 SW13 Figure S-7 Printed Wiring Of Board of Switch Unit R-937 - 3...
- Page 4 4-28 7-16 7-16 4-45 7-16 4-37 4-38 7-11 7-16 7-10 7-14 7-15 4-34 7-10 7-13 4-12 4-41 7-15 4-40 7-17 4-36 4-43 7-16 4-31 7-10 7-15 7-16 7-16 4-42 7-15 4-35 7-10 7-16 4-32 4-44 7-16 4-33 7-16 R-937- 4...
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Page 5: Table Of Contents
POWER UNIT CIRCUIT ......................... 38 CPU UNIT CIRCUIT ..........................39 INDICATOR CIRCUIT ..........................40 JOG AND SWITCH CIRCUIT ......................... 41 PRINTED WIRING BOARD OF POWER UNIT ..................42 PRINTED WIRING BOARD OF JOG AND SWITCH UNIT ..............43 PARTS LIST ............................44 SHARP CORPORATION... - Page 6 CAUTION MICROWAVE RADIATION Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating devices if it is improperly used or connected. All input and output microwave connections, waveguides, flanges and gaskets must be secured.
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Page 7: Warning
GRILL AND CONVECTION MICROWAVE OVEN R-933(IN)/ R-933(W) GENERAL INFORMATION GENERAL IMPORTANT INFORMATION This Manual has been prepared to provide Sharp Corp. Service engineers with Operation and Service Information. APPEARANCE VIEW 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 8: Servicing
Sharp beveelt ten sterkste aan dat, voor zover mogelijk, defecten worden opgespoord wanneer de stekker uit het Wanneer alle reparaties zijn uitgevoerd en de oven weer in stopcontact is gehaald. - Page 9 är kallt utför Du 3 steg kontroller och kontrollerar anslutningarna till varje enskild komponent på nytt. Sharp rekommenderar att felsökning sker med strömmen fränkopplad. Ibland kan det var nödvändigt att koppla på När all service är klar och ugnen ihopskruvad skall ugnens strömmen efter det att höljet avlägsnats, utför da 3 Steg...
- Page 10 Sharp raccomanda, nei limiti del possibile, che la ricerca dei guasti avvenga in assenza di alimentazione elettrica. Dopo aver portato a termine le operazioni di manutenzione In alcuni casi tuttavia, può...
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Page 11: Product Specifications
PRODUCT DESCRIPTION SPECIFICATION ITEM DESCRIPTION Power Requirements 230 Volts / 50 Hertz / Single phase, 3 wire earthed Power Consumption Microwave cooking 1.5 kW Approx. 6.7 A Convection cooking 2.65 kW Approx. 11.5 A Grill cooking 2.65 kW Approx. 11.5 A Micro and Grill ...... -
Page 12: Appearance View
APPEARANCE VIEW OVEN 1. Grill heating element 2. Oven lamp 3. Control panel 4. Shelf runners 5. Waveguide cover 6. Oven cavity 7. Coupling 8. Door seals and sealing surfaces 9. Door opening handle 10.Air-vent openings 11.Outer cabinet 14.Turntable support 12.Power cord 15.High Rack 16.Low Rack... -
Page 13: Operation Sequence
OPERATION SEQUENCE OFF CONDITION transformer, fan motor and turntable motor are cut off. 5. When the oven door is opened during a cooking cycle, Closing the door activates the monitored latch switch and the switches come to the following condition. the stop switch. - Page 14 OPERATION SEQUENCE WEIGHT dial. And select the desired cooking tempera- Note: The On/Off time ratio does not exactly correspond ture 250˚C by pressing the CONVECTION button. When to the percentage of microwave power, because the START button is pressed, the following operations approx.
- Page 15 OPERATION SEQUENCE FAN MOTOR OPERATION (in Grill, Convection down to zero. and Dual mode) 2. The oven lamp, fan motor and turntable motor are energized. When oven is stopped during cooking, or after the cooking 3. The relay RY3 is energized and the main supply is completed, the fan motor will operate if the oven cavity voltage is applied to the grill heating elements.
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Page 16: Function Of Important Components
FUNCTION OF IMPORTANT COMPONENTS DOOR OPEN MECHANISM CAUTION: BEFORE REPLACING A BLOWN FUSE F2 F8A, TEST THE MONITORED LATCH The door can be opened by puiiing the door handle. SWITCH SW1 AND MONITOR SWITCH When the door handle is pulled, the latch head is moved SW3 FOR PROPER OPERATION. - Page 17 FUNCTION OF IMPORTANT COMPONENTS CONVECTION COOKING SYSTEM ASYMMETRIC RECTIFIER This oven is designed with a hot air heating system where The asymmetric rectifier is solid state device that prevents food is heated by forced circulation of the hot air produced current flow in both directions.
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Page 18: Troubleshooting Guide
OPERATION SEQUENCE 32 (sec.) THERMISTOR 1-3. When the damper is moved to the open position by the damper cam, damper switch SW4 is closed (ON Sensing position). Voltage 1-4. The signal of damper switch SW4 is re-sensed in the Sensing the voltage across temperature measurement circuit. control unit and shut-off relay (RY8) is turned off. - Page 19 TROUBLESHOOTING GUIDE BLOCKED COOLING FAN BLOCKED CONVECTION FAN NO POWER AT WALL OUTLET HOME FUSE OR BREAKER MIS-ADJUSTMENT OF SWITCHES BLOCKED VENTILATION OPENINGS OPENED WIRE HARNESS SHORTED WIRE HARNESS OVEN LAMP OR SOCKET POWER SUPPLY CORD FOIL PATTERN ON P.W.B. RELAY RY8 RELAY RY7 RELAY RY6...
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Page 20: Test Procedure
TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MAGNETRON TEST NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL WHILE THE OVEN IS IN OPERATION. CARRY OUT 3D CHECKS. Isolate the magnetron from high voltage circuit by removing all leads connected to filament terminal. To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron filament terminals, the meter should show a reading of less than 1 ohm. - Page 21 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER Room temperature ....... To = 21˚C Initial temperature ..... T1 = 11°C Temperature after (47 + 3) = 50 sec..............T2 = 21°C Temperature difference Cold-Warm ..............∆T1 = 10°C Measured output power The equation is “P = 90 x ∆T”...
- Page 22 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER THE MEASURING INSTRUMENT MUST HAVE A VOLTAGE AT LEAST 6 VOLTS, BE- CAUSE OTHERWISE AN INFINITE RESISTANCE MIGHT BE SHOWN IN BOTH DIREC- TIONS. HIGH VOLTAGE CAPACITOR TEST CARRY OUT 3D CHECKS. A. Isolate the high voltage capacitor from the circuit. B.
- Page 23 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER An open circuit thermal cut-out (MG) TC1 indicates that the magnetron has overheated, this may be due to resistricted ventilation, cooling fan failure. An open circuit thermal cut-out (GRILL) TC2 indicates that the oven cavity has overheated, this may be due to no load operation..
- Page 24 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 3. If the fuse F2 F8A is blown, there could be shorts in the asymmetric rectifier or there is a ground in wire harness. A short in the asymmetric rectifier may be occurred due to short or ground in H.V. rectifier, magnetron, high voltage transformer or H.V.
- Page 25 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 2-3 Other possible troubles caused by defective control unit. a) Buzzer does not sound or continues to sound. b) Clock does not operate properly. c) Cooking is not possible. d) Proper temperature measurement is not obtained. JOG AND SWITCH UNIT TEST If the display fails to clear when the STOP button J-13...
- Page 26 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD (PWB) IS OPEN To protect the electronic circuits, this model is provided with a fine foil pattern added to the input circuit on the PWB, this foil pattern acts as a fuse.
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Page 27: Control Panel Assembly
CONTROL PANEL ASSEMBLY OUTLINE OF CONTROL PANEL The control section consists of the following units as 3) Synchronizing Signal Circuit shown in the control panel circuit. The power source synchronizing signal is available in order to compose a basic standard time in the clock (1) Jog and Switch Unit circuit. - Page 28 DESCRIPTION OF LSI LSI(IXA036DR) The I/O signal of the LSI(IXA036DR) are detailed in the following table. Pin No. Signal Description Terminal not used. Timing signal output terminal for temperature measurement(OVEN THERMISTOR). "H" level (GND) : Thermistor OPEN timing. "L" level (-5V) : Temperature measuring timing. (Convection cooking) Timing signal output terminal for temperature measurement(OVEN THERMISTOR).
- Page 29 DESCRIPTION OF LSI Pin No. Signal Description INT0 Signal to synchronized LSI with commercial power source frequency(50Hz). This is basic timing for time processing H : GND of LSI. L (-5V) 20 msec. CNVSS Connected to VC. RESET Auto clear terminal. Signal is input to reset the LSI to the initial state when power is applied.
- Page 30 DESCRIPTION OF LSI Pin No. Signal Description Damper motor relay driving signal. To turn on and off shut-off relay (RY8). Touch control transformer driving signal. To turn on and off the shut off relay (RY5). If the oven has not been used for more than 2 minutes, the relay RY5 will be turned off.
- Page 31 SERVICING 1. Precautions for Handling Electronic Components 5) Re-connect the power supply cord after the outer This unit uses CMOS LSI in the integral part of the circuits. case is installed. When handling these parts, the following precautions 6) Run the oven and check all functions. should be strictly followed.
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Page 32: Component Replacement And Adjustment Procedure
Oven lamp, Magnetron, High voltage trans- To prevent an electric shock, take the following former and Oven cavity. manners. 3) Sharp edge: 1. Before wiring, Bottom plate, Oven cavity, Weveguide flange, 1) Disconnect the power supply. Chassis support and other metallic plate. - Page 33 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE HIGH VOLTAGE TRANSFORMER REMOVAL 1. CARRY OUT 3D CHECKS. 4. Remove the two (2) screws and one (1) washer holding 2. Disconnect the main wire harness from the high volt- the transformer to the base plate. age transformer.
- Page 34 Re-install 4. Cut the three (3) bridges holding the turntable motor 1. Remove the any sharp edges on the turntable motor cover to the base plate with cutting pliers as shown in cover and the base plate with the cutting pliers.
- Page 35 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 17. Remove the one (1) screw holding the convection 16. Remove the convection fan from the convection motor heater angle and the air separate angle D to the shaft. convection duct. 17. Remove the pipe from the convection motor shaft. 18.
- Page 36 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE GRILL HEATING ELEMENTS REMOVAL 1. CARRY OUT 3D CHECKS. the oven cavity top plate, slide the grill reflector toward 2. Disconnect wire leads from the thermal cut-out (GRILL). the magnetron. And then lift up the grill reflector and 3.
- Page 37 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE DOOR REPLACEMENT to door frame. REMOVAL 4. Re-install door panel to door frame. 1. Disconnect the oven from the power supply. 5. Hold the door panel to the door frame with six (6) 2. Push the door slightly. screws.
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Page 38: Microwave Measurement
MICROWAVE MEASUREMENT Recommended instruments are: After adjustment of door latch switches, monitor switch NARDA 8100 and door are completed individually or collectively, the NARDA 8200 following leakage test must be performed with a survey HOLADAY HI 1500 instrument and it must be confirmed that the result meets SIMPSON 380M the requirements of the performance standard for micro- 2. -
Page 39: Wiring Diagram
SCHEMATICS Note: SCHEMATIC AC CORD CONNECTION NOTE: CONDITION OF OVEN BRN : BROWN 1. DOOR CLOSED. BLU : BLUE 2. PLUGGED IN OVEN. G-Y : GREEN AND YELLOW STRIPE 3. NOTHING APPEARS ON DISPLAY. /15 : SECTIONAL AREA OF 1.5mm MIN. - Page 40 SCHEMATICS Note: SCHEMATIC AC CORD CONNECTION NOTE: CONDITION OF OVEN BRN : BROWN 1. DOOR CLOSED. BLU : BLUE 3. " . O" APPEARS ON DISPLAY. G-Y : GREEN AND YELLOW STRIPE /15 : SECTIONAL AREA OF 1.5mm MIN. " "...
- Page 41 SCHEMATICS SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. GRILL MODE SET. NOTE: The convection cooking will be curried out as back up until the 3. COOKING TIME SET. oven cavity temperature rises to 220 ˚C 4. STRAT BUTTON PRESSED. CONTROL UNIT SW4:...
- Page 42 SCHEMATICS Note: SCHEMATIC NOTE: CONDITION OF OVEN AC CORD CONNECTION 1. DOOR CLOSED. BRN : BROWN 2. DUAL 1 MODE SET. BLU : BLUE 3. COOKING TIME SET. G-Y : GREEN AND YELLOW STRIPE 4. MICROWAVE POWER LEVEL SET. /15 : SECTIONAL AREA OF 1.5mm MIN.
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Page 43: Pictorial Diagram
PICTORIAL DIAGRAM... -
Page 44: Power Unit Circuit
POWER UNIT CIRCUIT OVEN S1NB10 WH1-4 THERMISTOR WH1-3 – – R4 510 1w WH1-6 Q1 2SB1238 R5 3.3k WH1-9 BUZZER AC230V R3 680 1w 50Hz WH2-2 WH1-10 WH1-5 POWER WH1-11 CONTROL WH1-8 FAN MOTOR CONVECTION WH1-7 MOTOR DAMPER WH2-4 MOTOR R6 130 1w OVEN LAMP WH2-3... -
Page 45: Cpu Unit Circuit
CPU UNIT CIRCUIT... -
Page 46: Indicator Circuit
INDICATOR CIRCUIT... -
Page 47: Jog And Switch Circuit
JOG AND SWITCH UNIT CIRCUIT : IF NOT SPECIFIED 0.01µF / 25V : IF NOT SPECIFIED 1/10W ± 5% J - 6 J - 5 J - 2 J - 1 CN - J AUTO IC1-6(P73) COOK R68 15 k IC1-7(P72) WATT R69 15 k... -
Page 48: Printed Wiring Board Of Power Unit
PRINTED WIRING BOARD OF POWER UNIT VRS1 POWER CONT Figure S-6. Printed Wiring Board of Power Unit... -
Page 49: Printed Wiring Board Of Jog And Switch Unit
PRINTED WIRING BOARD OF JOG AND SWITCH UNIT SW11 DUCT SW10 SW12 SW13 Figure S-7. Printed Wiring Board of Jog and Switch Unit... -
Page 50: Parts List
PARTS LIST ∆ Note: The parts marked " " may cause undue microwave exposure. / The parts marked "*" are used in voltage more than 250V. / "§" Mark: Spare parts delivery section REF. NO. PART NO. § DESCRIPTION Q'TY CODE ELECTRIC PARTS RC-QZA219WRE0 High voltage capacitor... - Page 51 PARTS LIST ∆ Note: The parts marked " " may cause undue microwave exposure. / The parts marked "*" are used in voltage more than 250V. / "§" Mark: Spare parts delivery section REF. NO. PART NO. § DESCRIPTION Q'TY CODE 3- 6 HPNLCK010URR0 Jog panel [R-933(IN)]...
- Page 52 PARTS LIST ∆ Note: The parts marked " " may cause undue microwave exposure. / The parts marked "*" are used in voltage more than 250V. / "§" Mark: Spare parts delivery section REF. NO. PART NO. § DESCRIPTION Q'TY CODE 5-1-4 JHNDPK001URF0 Door handle [R-933(IN)]...
- Page 53 EXPLODED VIEW OF OVEN OVEN PARTS 7-16 4-17 7-10 4-25 7-13 6-11 4-18 4-20 7-17 4-39 4-27 7-16 4-10 4-22 7-16 4-21 4-19 4-13 7-13 7-13 4-23 4-15 7-17 7-12 7-16 4-16 7-10 7-18 4-24 4-14 4-11 7-16 7-14 4-26 7-12 4-30 4-29...
- Page 54 CONTROL PANEL AND DOOR PARTS CONTROL PANEL PARTS 3-15 3-15 3-15 3-13 3-14 3-12 3-11 DOOR PARTS 3-10 5-1-8 5-1-1 5-1-2 5-1-3 5-1-8 5-1-5 5-1-7 5-1-6 5-1-4...
- Page 55 MISCELLANEOUS/PACKING AND ACCESSORIES MISCELLANEOUS Actual wire harness may be different than illustration. 6-10 To Magnetron To Capacitor PACKING AND ACCESSORIES TURNTABLE TRAY BAKING TIN TRAY PAD (SPADPA020URE0) TOP PAD ASSEMBLY (FPADBA303WRK2) LOW RACK WRAP COVER (SSAKHA041WRE0) HIGH RACK DOOR PROTECTION SHEET ROLLER STAY ASSEMBLY (SPADPA020WRE0) PRINTED MATTER...
- Page 56 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. 2000 SHARP CORP. (7S1.31E) Printed in U.K.