Sharp Carousel R-930CS Service Manual Download Page 40

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R-930CS

Figure S-1. Pictorial Diagram

TURNTABLE

MOTOR

GRY

BRN

ORG

GRN

RED

BLK

DAMPER

MOTOR

COOLING

FAN

MOTOR

RED

BLK

OVEN

THERMAL

CUT-OUT

MAGNETRON

TEMPERATURE

FUSE

GRY

IC-1

RED

PNK

RED

GRN

WHT

PPL

ORG

RY1

RY2

RY3

CN-F

CN-E

CN-A

N.O.

COM

CN-E

ORG

BLK

AH SENSOR

RED

WHT

CN-F

SECONDARY

INTERLOCK

SWITCH

CONTROL PANEL

HEATING

ELEMENT

MONITOR

SWITCH

CONVECTION MOTOR

POWER SUPPLY CORD

120V 60Hz

GRN

NOTE:

The grounding conductor of

the power supply cord has

been grounded by power

supply cord fixing screw.

The screw must be kept

allways tight.

NOTE:

The neutral (GRY) wire

must be connected to

the terminal with "N"

mark on the power

supply cord.

OVEN LAMP

& SOCKET

N.O.

PNK

THERMISTOR

RED

MONITOR FUSE

& FUSE HOLDER

PNK

MAGNETRON

HIGH VOLTAGE COMPONENTS

HIGH VOLTAGE

CAPACITOR

HIGH

VOLTAGE

WIRE B

POWER TRANSFORMER

BLK

WHT

GRY

ORG

RY6

RY4

RY5

CN-G

RY1 (COM.)

RY1 (N.O.)

BRN

RY2 (COM.)

ORG

RY2 (N.O.)

RY3 (COM.)

RED

RY3 (N.O.)

BRN

PNK

GRY

PNK

ORG

NOTE:

Hot (ORG) wire must be connected to the

power transformer terminal nearest to the

transformer mounting screw.

DOOR

SENSING

SWITCH

GRN

COM

N.C.

WHT

ORG

BRN

COM.

N.O.

COM.

N.O.

COM.

N.O.

WHT

PNK

DAMPER

SWITCH

COM

N.O.

GRY

NOTE:

Hot (YLW & PNK) wire

must be connected to the

terminal with blue mark

on the oven light socket.

GRY

PNK

BLUE MARK

RED

WHT

Summary of Contents for Carousel R-930CS

Page 1: ...ON 6 TROUBLESHOOTING GUIDE 12 TEST PROCEDURE 14 TOUCH CONTROL PANEL 25 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 31 PICTORIAL DIAGRAM 38 CONTROL PANEL CIRCUIT 39 PRINTED WIRING BOARD 40 PARTS LIST 41 PACKING AND ACCESSORIES 44 R 930CS S9913R930CPST MODEL SERVICE MANUAL SHARP CORPORATION This document has been published to be used for after sales service only The contents are subject to change...

Page 2: ... and transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is released to the owner e A microwave leakage check to verify compliance with the Federal Performance Standard should be performed on each oven prior to release to the owner BEFORE SERVICING Before servicing an operative unit perform a microwave emission check as per the Microwa...

Page 3: ...acitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that the leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure reconnect the power supply cord When the testing is completed 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 Reconnec...

Page 4: ...e oven cavity The water container shall be a low form of 600 ml 20 oz beaker with an inside diameter of approx 8 5 cm 3 1 2 in and made of an electrically nonconductive material such as glass or plastic The placing of this standard load in the oven is important not only to protect the oven but also to insure that any leakage is measured accurately 4 Set the cooking control on Full Power Cooking Mo...

Page 5: ...ve radiation hazard WARNING Never operate the oven until the following points are ensured A The door is tightly closed B The door brackets and hinges are not defective C The door packing is not damaged D The door is not deformed or warped E There is no other visible damage with the oven Servicing and repair work must be carried out only by trained service personnel DANGER Certaininitialpartsareint...

Page 6: ...VECTION 100 450 F Temp control LOW MIX BAKE 350 F with 10 microwave power HIGH MIX ROAST 300 F with 30 microwave power SLOW COOK 300 F for 4 hours no preheat BROIL 450 F preheat CUSTOM HELP pad SENSOR REHEAT pad MINUTE PLUS pad POPCORN pad COMPU DEFROST pad SENSOR COOK pad COMPU BROIL pad COMPU ROAST pad COMPU BAKE pad REHEAT pad CONVEC pad BROIL pad SLOW COOK pad HIGH MIX ROAST pad LOW MIX BAKE p...

Page 7: ... THIS PLUG OVEN DIAGRAM 1 Ventilation openings Rear side 2 Oven door with see through window 3 Oven lamp 4 Turntable support 5 Removable turntable The turntable will rotate clockwise or counterclockwise 6 Safety door latches The oven will not operate unless the door is securely closed 7 Wave guide cover 8 Door open button 9 Auto Touch control panel 10 Lighted digital display 11 Convection air open...

Page 8: ...primary interlock relay and the secondary interlock switch are activated with the following results The circuits to the turntable motor the cooling fan motor and the high 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 Themonitorswitchiselectricallymonitoringtheoperation of theprima...

Page 9: ... send a signal to the control unit de energizing shut off relay RY4 AUTOMATIC MIX COOKING CONDITION Touch the HIGH MIX ROAST or the LOW MIX BAKE pad first And then program desired cooking time by touching the Number pads The LOW MIX BAKE pad is preprogrammed for 350 F with 10 microwave power while the HIGH MIX ROAST pad is preprogrammed for 300 F with 30 micro wave power When the START pad is touc...

Page 10: ...convection motor The power supply voltage is applied to the heating element 4 Now the oven is in the convection cooking mode 5 Whentheoventemperaturehasreachedtheprogrammed convection temperature the oven goes into the programmed cooking mode 6 At the end of the COMPU BROIL ROAST BAKE cycle the damper is returned to the open position and the oven will go to the off condition The cooling fan will r...

Page 11: ...R SENSING SWITCH AH SENSOR DAMPER MOTOR CONVECTION MOTOR TURNTABLE MOTOR HEATIMG ELEMENT MAGNETRON POWER TRANSFORMER H V RECTIFIER CAPACITOR 0 94µ RY4 RY5 RY6 RY1 SECONDARY INTERLOCK SWITCH 120V 60Hz TTM FM COM RY1 E 5 E 4 E 3 E 2 E 1 F 3 F 2 F 1 RY3 RY2 PRIMARY INTERLOCK RELAY N O RY1 COM RY3 COM RY2 N O RY2 N O RY3 A 9 A 7 CM DM OL MAGNETRON TEMPERATURE FUSE FUSE RY2 CONV THERMAL CUT OUT MONITOR...

Page 12: ...RY INTERLOCK RELAY N O RY1 COM RY3 COM RY2 N O RY2 N O RY3 A 9 A 7 CM DM OL MAGNETRON TEMPERATURE FUSE FUSE RY2 CONV THERMAL CUT OUT MONITOR SWITCH OVEN LAMP FAN MOTOR A 5 A 3 A 1 E 6 CONTROL UNIT DAMPER SWITCH THER MISTOR DOOR SENSING SWITCH AH SENSOR DAMPER MOTOR CONVECTION MOTOR TURNTABLE MOTOR HEATIMG ELEMENT MAGNETRON POWER TRANSFORMER H V RECTIFIER CAPACITOR 0 94µ RY4 RY5 RY6 RY1 SECONDARY I...

Page 13: ...vection time reaches 0 the heating element is de energized and the convection fan stops operating and the oven shuts off DAMPER OPEN CLOSE MECHANISM Usually the damper is in the open position except during convection cooking Damper position is set automatically by damper motor damper switch motor cam and damper shaft These components are operated by a signal that judges if microwave cooking or con...

Page 14: ...hanism DAMPER DUCT DAMPER DAMPER CAM DAMPER MOTOR DAMPER SWITCH DAMPER SHAFT 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 ...

Page 15: ...lay does not operate properly when STOP CLEAR pad is touched The time of day should appear on the display with beep sound Oven lamp does not light with door opened Oven lamp does not light in cook cycle It light when door is opened Cooking cycle runs 1 minute then shuts down Oven lamp light but turntable motor does not operate Turntable motor operates normally but cooling fan motor does not operat...

Page 16: ...e temperature of the water 2 Place the cup of water in the oven Operate oven at POWER 10 HIGH selecting more than 60 seconds cook time Allow the water to heat for 60 seconds measuring with a stop watch second hand of a watch or the digital read out countdown 3 Remove the cup from the oven and again measure the temperature making sure to stir the thermometer or thermocouple through the water until ...

Page 17: ...r supply cord after the outer case is installed 8 Run the oven and check all functions F PRIMARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH 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 Isolatetheswitchandconnecttheohmmetertothecommon COM andnormallyopen NO terminal of the switch The meter should indicate an open...

Page 18: ...hmmeter as follows When the door is open the meter should indicate a closed circuit When the monitor switch actuator is pushed by a screw driver through the lower latch hole on the front plate of the oven cavity with the door opened in this condition the plunger of the monitor switch is pushed in the meter should indicate an open circuit If improper operation is indicated the switch may be defecti...

Page 19: ...it Check for restricted air flow to the heater unit through the vent holes of the oven cavity especially the heater duct and convection fan 5 Reconnect all leads removed from components during testing 6 Reinstall the outer case cabinet 7 Reconnect the power supply cord after the outer case is installed 8 Run the oven and check all functions CAUTION IFTHETHERMALCUT OUTINDICATESANOPENCIRCUITATROOMTE...

Page 20: ...es not indicate above resistance replace the thermistor 6 Reconnect all leads removed from components during testing 7 Reinstall the outer case cabinet 8 Reconnect the power supply cord after the outer case is installed 9 Run the oven and check all functions L THERMISTOR TEST M DAMPER MOTOR TEST When the power cord is plugged into the wall receptacle and 120 volts A C is supplied to the damper mot...

Page 21: ...oor 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 8 Run the oven and check all functions TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 9 Open the door and block it open 10 Discharge high voltage capacito...

Page 22: ...the door and block it open 3 Discharge high voltage capacitor 4 If the display fails to clear when the STOP CLEAR pad is depressed first verify the flat ribbon cable is making good contact verify that the door sensing switch stop switch operates properly that is the contacts are closed when the door is closed and open when the door is open If the door sensing switch stop switch is good disconnect ...

Page 23: ...r RY5 Approx 19 0V D C Convection motor RY6 Approx 19 0V D C Cooling fan motor 8 Disconnect the power supply cord and then remove outer case 9 Open the door and block it open 10 Discharge high voltage capacitor 11 Reconnect all leads removed from components during testing 12 Re install the outer case cabinet 13 Reconnect the power supply cord after the outer case is installed 14 Run the oven and c...

Page 24: ...tion tape 6 After that procedure re connect the power supply cord 7 Follow the troubleshooting guide given below for repair STEPS OCCURRENCE CAUSE OR CORRECTION 1 The rated AC voltage is not present to power Check supply voltage and oven power cord terminal of CPU connecter CN A 2 The rated AC voltage is present at primary Low voltage transformer or secondary circuit defective side of low voltage ...

Page 25: ... of sensor cooking 6 Afterapproximately16seconds microwaveenergyisproduced andthedisplayshouldstarttocount down the remaining cooking time and oven should turn off after water is boiling bubbling If the oven does not turn off replace the AH sensor or check the control unit refer to explanation below TESTING METHOD FOR AH SENSOR AND OR CONTROL UNIT To determine if the sensor is defective the simple...

Page 26: ...it is probably defective If the above is proper the AH sensor is probably defective 10 Disconnect the power supply cord and then remove outer case 11 Open the door and block it open 12 Discharge high voltage capacitor 13 Disconnect the dummy resistor circuit from the sensor connector of control panel 14 Carry out necessary repair 15 Reconnect all leads removed from components during testing and re...

Page 27: ...is applied 5 Buzzer Circuit The buzzer is responds to signals from the LSI to emit noticingsounds keytouchsoundandcompletionsound 6 Temperature Measurement Circuit OVEN THERMISTOR The temperature in the oven cavity is sensed by the thermistor Thevariationofresistanceaccordingtosensed temperatureisdetectedbythetemperaturemeasurement circuit and the result applied to LSI The LSI uses this informatio...

Page 28: ... voltage corresponding to the temperature detected by the thermistor this input is converted into temperature by the A D converter built into the LSI 13 P55 OUT Digit selection signal The relationship between digit signal and digit are as follows Digit signal Digit P03 1st P02 2nd P01 3rd P00 4th P37 5th P36 6th P35 7th P55 8th Normally one pulse is output in every ß period and input to the grid o...

Page 29: ...GND 27 RST IN Auto clear terminal Signal is input to reset the LSI to the initial state when power is applied Temporarily set to L level the moment power is applied at this time the LSI is reset Thereafter set at H level 28 29 XCIN XCOUT OUT Terminal not used 30 XIN IN Internal clock oscillation frequency setting input The internal clock frequency is set by inserting the ceramic filter oscillation...

Page 30: ...ey strobe signal Signal applied to touch key section A pulse signal is input to P24 P27 terminal while one of G 9 line keys on key matrix is touched 45 P13 OUT 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 8 line keys on key matrix is touched 46 P12 OUT Segment data signal Signal similar to...

Page 31: ... resistance values in parallel with R50 1 Changing the resistancevaluesresultsinthatthereisthesamepotential at both F 3 terminal of the absolute humidity sensor and AN7 terminal of the LSI The voltage of AN6 terminal will indicate about 2 5V This initial balancing is set up about 16 seconds after the unit is put in the Sensor Cooking mode As the sensor cooking proceeds the food is heated to genera...

Page 32: ...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 For those models it is poss...

Page 33: ...e sure that a definite click can be heard when the microwave oven door is unlatched Hold the door in a closed position with one hand then push the door open button with the other this causes the latch leads to rise it is then possible to hear a click as the door switches operate 3 Visuallycheckthedoorandcavityfaceplatefordamage dents cracks signs of arcing etc Carry out any remedial work that is n...

Page 34: ...t open 3 Discharge high voltage capacitor 4 Disconnect filament leads of transformer from the magnetron and capacitor 5 Disconnect high voltage lead of capacitor from the transformer 6 Disconnect wire leads from the transformer 7 Remove two 2 screws holding the transformer to the base cabinet Re install 1 Rest the transformer on the base cabinet with its primary terminals toward rear cabinet 2 Ins...

Page 35: ...nnector 5 Pull down on the positive lock connector CAUTION WHEN YOU CONNECTING THE POSITIVE LOCK CONNECTORS TO THE TERMINALS INSTALL THE POSITIVE LOCK SO THAT THE LEVER FACES YOU Figure C 2 Positive lock connector CONVECTION MOTOR REMOVAL 1 Disconnect the power supply cord and then remove outer case 2 Open the oven door and block it open 3 Discharge high voltage capacitor 4 Disconnect wire leads f...

Page 36: ...uide Right 6 Remove three 3 screws holding the chassis support to the rear cabinet waveguide and control panel back plate 7 Remove the chassis support from the oven 8 Remove one 1 screw holding the magnetron air guide to the waveguide 9 Remove the magnetron air guide from the waveguide 10 Disconnect wire leads from the fan motor 11 Release the main harness from the hole of the fan duct 12 Release ...

Page 37: ...ay be cut or injured Do not disfigure the bracket by touching with the pliers 18 Remove the fan blade from the shaft of the fan motor by pulling and rotating the fan blade with your hand 19 Now the fan blade will be free CAUTION Do not reuse the removed fan blade because the hole for shaft may be larger than normal 20 Remove the two 2 screws and nuts holding the fan motor to the fan duct 21 Now th...

Page 38: ...from horizontal line of cavity face plate is to be less than 1 0mm 3 Door is positioned with its face pressed toward cavity face plate 4 Re install outer case and 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 energ...

Page 39: ...R PANEL 5 Remove the twelve 12 screws holding the door panel to the door frame NOTE The one 1 screw of the twelve 12 screws also holds the earth terminal of the door decoration to the door frame 6 Remove the door panel from the door frame Now the door panel is free DOOR GLASS 7 Remove the two 2 screws holding the thermal plate U to the door frame 8 Remove the two 2 screws holding the thermal plate...

Page 40: ...s tight NOTE The neutral GRY wire must be connected to the terminal with N mark on the power supply cord OVEN LAMP SOCKET N O PNK N H G R Y R E D THERMISTOR 1 2 RED RED RED RED MONITOR FUSE FUSE HOLDER PNK MAGNETRON HIGH VOLTAGE COMPONENTS HIGH VOLTAGE CAPACITOR HIGH VOLTAGE WIRE B POWER TRANSFORMER P P L BLK WHT WHT GRY ORG RY6 RY4 RY5 CN G RY1 COM RY1 N O BRN RY2 COM ORG ORG RY2 N O RY3 COM RED ...

Page 41: ...WITCH OVEN THERMISTOR AH SENSOR OVEN LAMP TURNTABLE MOTOR RY6 RY2 D30 RY3 RY1 R31 4 7k R51 4 7k R62 27kF CF1 4 19MHz C70 330pF x 4 A B C C30 C50 C60 D3 D4 D7 Q1 2SB1238 Q4 DTA123ES Q3 KRA101M Q90 KRA101M Q40 KRA101M Q21 KRA101M Q22 KRA101M Q24 KRA101M Q25 KRA101M Q23 KRA101M Q26 KRC243M Q20 KRA101M R10 18 1w CONTROL UNIT C10 0 1µ 50v VP VP F F 8G 31 32 1 2 29 MIX CONV DEFROST SENSOR COOK LBS OZ KG...

Page 42: ...0 ZD3 ZD4 8 10 11 12 J7 J2 J4 J6 J5 J3 C10 C81 C80 C45 R47 C46 C47 R48 R49 CN D CN G CN G CN F CN E ONLY 9X58PJ C7 C9 C5 C6 C21 C4 C2 C22 C1 R3 C3 C60 C50 C30 R45 R91 R92 R93 R64 R80 R81 R73 D70 D71 D72 D73 D74 D75 D76 D77 R72 R71 R70 R79 R78 R77 R76 R75 R74 R86 J8 R90 R7 R100 R40 DAMP SW DOOR SW OVEN TEMP R50 R51 R31 R30 POWER TRANS POWER OL TTM R62 C20 26 CN A ZD2 R2 D3 D4 D1 D2 Q1 Q23 Q26 Q22 E...

Page 43: ...rew 4mm x 8mm 1 AA 2 4 GLEGPA019WRE0 Foot 4 AD 2 5 GCABDA095WRW0 Rear cabinet 1 AH 2 6 LHLDKA009WRF0 Cord holder 1 AG 2 7 LBNDKA036WRP0 Capacitor holder 1 AG 2 8 FHNG A092WRM0 Oven hinge Lower 1 AF 2 9 PHOK A112WRF0 Latch hook 1 AM 2 10 MLEVPA231WRF0 Switch lever 1 AE CONTROL PANEL PARTS 3 1 CPWBFA748WRK0 Control unit 1 BU 3 1A QCNCMA227DRE0 5 pin connector A 1 AC 3 1B QCNCMA267DRE0 6 pin connecto...

Page 44: ...E0 Relay OJ SH 118LM 3 AG SP40 RALM A014DRE0 Buzzer PKM22EPT 1 AG T1 RTRNPA022DRE0 Transformer 1 AN VRS1 RH VZA032DRE0 Varistor 10G471K 1 AE ZD2 VHEHZ161 1 Zener diode HZ16 1 1 AA ZD3 VHEHZ5C2 1 Zener diode HZ5C 2 1 AA ZD4 VHEHZ4A2 1 Zener diode HZ4A2 1 AA 3 2 DPNLCB575WRK0 Control panel frame with key unit 1 BD 3 2 1 FUNTKA958WRE0 Key unit 1 AW 3 2 2 JBTN B110WRF0 Open button 1 AF 3 2 3 MSPRCA050...

Page 45: ...w 4mm x 8mm 6 AA 5 12 XEBSD30P08000 Screw 3mm x 8mm 12 AA 5 13 PCUSGA537WRPZ Cushion 1 AD MISCELLANEOUS 6 1 FAMI A088WRM0 Low rack Broiling trivet 1 AW 6 2 FAMI A087WRM0 High rack Baking rack 1 AW 6 3 TCADCA522WRR0 Cook book 1 BA 6 4 FW VZB342WRE0 Thermistor harness 1 AN 6 5 FW VZB668WRE0 Main wire harness 1 AZ 6 6 QW QZA198WRE0 High voltage wire B 1 AN 6 7 QW VZA108WRE0 Grounding wire Cooling fan...

Page 46: ...wing information 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 4 3 TURNTABLE TRAY 6 11 OPERATION MANUAL 6 3 COOK BOOK 4 2 TURNTABLE SUPPORT TRAY PACKING FOAM SPADPA198WRE0 CABINET COVER SPADPA507WRE0 DOOR PROTECTION SHE...

Page 47: ... 30 4 7 7 11 4 29 4 1 4 22 4 23 7 11 7 12 7 25 4 3 4 2 1 7 2 7 7 19 1 18 7 16 7 1 1 2 1 4 4 21 1 4 4 26 4 27 4 18 4 20 7 9 7 16 4 19 1 6 1 9 7 17 4 17 7 23 7 6 1 16 4 40 4 14 7 24 2 4 2 3 2 2 3 1 7 22 4 28 7 7 1 21 4 16 4 24 4 24 7 18 7 18 4 38 4 6 7 15 4 38 4 39 x 5 7 2 6 10 7 2 4 34 4 25 4 13 x3 x3 x2 x9 7 22 6 7 6 4 6 7 7 16 1 20 2 3 x4 x5 x2 1 17 7 22 7 16 7 16 x3 4 5 7 20 1 1 A x3 7 1 2 2 2 5...

Page 48: ...A B C D E F G H 5 3 5 12 5 1 5 Actual wire harness may be different than illustration 6 4 6 5 6 6 6 7 6 2 5 11 5 7 5 11 5 11 5 11 5 2 5 8 5 6 5 10 5 5 5 4 5 9 5 13 x 3 7 24 7 24 3 5 3 4 3 7 3 3 3 2 3 2 1 3 6 3 1 3 2 3 3 7 3 8 3 2 2 3 2 4 3 2 5 6 1 DOOR PARTS CONTROL PANEL PARTS MISCELLANEOUS ...

Page 49: ...Y SHARP CORPORATION ALL RIGHTS RESERVED No part of this publication may be repro duced stored in retrieval systems or trans mitted in any form or by any means elec tronic mechanical photocopying record ing or otherwise without prior written per mission of the publisher ...

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