Sharp R-220DW Service Manual Download Page 9

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R-220DW
R-230DK
R-230DW

Figure O-1. Oven Schematic-Off Condition

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED

2. CLOCK APPEARS ON DISPLAY

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED

2. COOKING TIME PROGRAMMED

3. VARIABLE COOKING CONTROL "HIGH"

4. "START" PAD TOUCHED

Figure O-2. Oven Schematic-Cooking Condition

POWER
TRANSFORMER

RECTIFIER

MAGNETRON

CAPACITOR
0.86

C/T FUSE

120V AC
60 Hz

OVEN
LAMP

TURN-
TABLE
MOTOR

FAN
MOTOR

MONITOR
SWITCH

SECONDARY
INTERLOCK
SWITCH

TTM

GRN

COM.

N.O.

DOOR
SENSING
SWITCH

(RY-1)

(RY-2)

CONTROL UNIT

PRIMARY
INTERLOCK
RELAY

MAGNETRON
THERMAL CUT-OUT

POWER
TRANSFORMER

RECTIFIER

MAGNETRON

CAPACITOR
0.86

C/T FUSE

120V AC
60 Hz

OVEN
LAMP

TURN-
TABLE
MOTOR

FAN
MOTOR

MONITOR
SWITCH

SECONDARY
INTERLOCK
SWITCH

TTM

GRN

COM.

N.O.

DOOR
SENSING
SWITCH

(RY-1)

(RY-2)

CONTROL UNIT

PRIMARY
INTERLOCK
RELAY

MAGNETRON
THERMAL CUT-OUT

Summary of Contents for R-220DW

Page 1: ...ICING INSIDE FRONT COVER WARNING TO SERVICE PERSONNEL 1 MICROWAVE MEASUREMENT PROCEDURE 2 FOREWORD AND WARNING 3 PRODUCT SPECIFICATIONS 4 GENERAL INFORMATION 4 OPERATION 6 TROUBLESHOOTING GUIDE 9 TEST PROCEDURE 10 TOUCH CONTROL PANEL 18 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 22 PICTORIAL DIAGRAM 28 CONTROL PANEL CIRCUIT 29 PARTS LIST 31 PACKING AND ACCESSORIES 32 S1004R220DPW R 220DW R 230...

Page 2: ...neration 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...

Page 3: ...ge capacitor 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 Re...

Page 4: ...er of the 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 Co...

Page 5: ...door packing is not damaged D The door is not deformed or warped E There is not any other visible damage with the oven Servicing and repair work must be carried out only by trained service personnel DANGER Certaininitialpartsareintentionallynotgroundedandpresent a risk of electrical shock only during servicing Service personnel Do not contact the following parts while the appliance is energized Hi...

Page 6: ... 18 1 8 Height 11 3 8 Depth 14 5 8 Cooking Cavity Dimensions Width 12 3 8 0 8 Cubic feet Height 8 1 4 Depth 13 Control Complement Touch Control System Clock 1 00 12 59 Timer 0 99 minutes 99 seconds Microwave Power for Variable Cooking Repetition Rate P HI Full power throughout the cooking time P 90 approx 90 of FULL Power P 80 approx 80 of FULL Power P 70 approx 70 of FULL Power P 60 approx 60 of ...

Page 7: ...ally 3 Pronged Plug Grounded Receptacle Box Grounding Pin 3 Pronged Receptacle OVEN DIAGRAM 1 Oven door with see through window 2 Safety door latches 3 Door hinges 4 Door seals and sealing surfaces 5 Turntable motor shaft 6 Removable turntable support 7 Removable turntable 8 Ventilation openings Rear 9 Oven lamp CAUTION DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE ROUND GROUNDING PRONG FROM TH...

Page 8: ...r sensing switch secondary interlock switch andprimaryinterlockrelayareactivatedwiththefollowing results The circuits to the oven lamp turntable motor the cooling fan motor and the high voltage components are de energized and the digital read out displays the time still remaining in the cook cycle when the door was opened 7 Themonitorswitchiselectricallymonitoringtheoperation of the secondary inte...

Page 9: ...MAGNETRON CAPACITOR 0 86µF C T FUSE 120V AC 60 Hz OVEN LAMP TURN TABLE MOTOR FAN MOTOR MONITOR SWITCH SECONDARY INTERLOCK SWITCH TTM OL FM GRN A3 COM N O DOOR SENSING SWITCH B1 B2 RY 1 RY 2 CONTROL UNIT PRIMARY INTERLOCK RELAY MAGNETRON THERMAL CUT OUT A1 POWER TRANSFORMER RECTIFIER MAGNETRON CAPACITOR 0 86µF C T FUSE 120V AC 60 Hz OVEN LAMP TURN TABLE MOTOR FAN MOTOR MONITOR SWITCH SECONDARY INTE...

Page 10: ... RY2 SECOND ARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION RE FER TO CHAPTER TEST PROCEDURE NOTE C T FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY TURNTABLE MOTOR The turntable motor rotates the turntable located on the bottom of the oven cavity so that the food on the turntable is cooked evenly The turntable may turn in either direction COOLING FAN MOTOR The cooling fan motor ...

Page 11: ...KZ as an assembly IMPORTANT Whenever troubleshooting is performed with the power supply cord disconnected It may in some cases be necessary to connect the power supply cord after the outer case has been removed in this event 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 leads to the primary of the...

Page 12: ...power cord is plugged into wall receptacle All letters and indicators do not ap pear in display when power cord is first plugged into wall outlet Display does not operate properly when STOP CLEAR key is touched Buzzer should sound and time of day should appear in display C T fuse blows when the door is opened Fan motor does not operate All other electric components function Oven lamp does not ligh...

Page 13: ...y performing a water temperature rise test This test shouldonlybeusedifabovetestsdonotindicateafaultymagnetronandthereisnodefectinthefollowing componentsorwiring siliconrectifier highvoltagecapacitorandpowertransformer Thistestwillrequire a 16 ounce 453cc measuring cup and an accurate mercury thermometer or thermocouple type temperature tester For accurate results the following procedure must be f...

Page 14: ...he cooling fan air guide 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 OUTINDICATESANOPENCIRCUITATROOMTEMPERATURE REPLACE THERMAL CUT OUT C HIGH VOLTAGE RECTIFIER TEST 1 Disconnect the power supply cord and then remove ...

Page 15: ...cabinet 7 Reconnect the power supply cord after the outer case is installed 8 Run the oven and check all functions 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 met...

Page 16: ... OPEN CIRCUIT AT ROOM TEMPERATURE REPLACE THE C T FUSE 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 The touch control panel consists of circuits including semiconductors such as LSI ICs etc Therefore unlike conventional microwave ovens proper...

Page 17: ... components during testing 5 Re install the outer case cabinet 6 Reconnect the power supply cord after the outer case is installed 7 Run the oven and check all functions TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST J KEY UNIT 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 If the display fails to clear whe...

Page 18: ...erminal of the relay RY2 on the control unit with an A C voltmeter The meter should indicate 120 volts if not check oven circuit RY1 and RY2 Relay 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 DC voltage indicated Defective relay DC voltage not indicated Check diode which is connected to the relay coil If d...

Page 19: ...given below if indicator does not light up after above check and repairs are finished 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 leads to the primary of the power transformer 5 Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 6 After that p...

Page 20: ...iquid Crystal Display TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL 3 Power Source Circuit This circuit generates voltage necessary in the control unitfromtheAClinevoltage Inaddition thesynchronizing signal is available in order to compose a basic standard time in the clock circuit Symbol Voltage Application VC 5V LSI IC1 4 Relay Circuit To drive the magnetron fan motor turntable mot...

Page 21: ...g to the Model By using the A D converter contained in the LSI DC voltage in accordance with the Model in operation is applied to set up its function 14 P43 IN To input signal which communicates the door open close information to LSI Door close H level signal 0V Door open L level 5V 15 BZ OUT Signal to sound buzzer 2 0 kHz A Key touch sound B Completion sound 16 R00 OUT Key strobe signal Signal ap...

Page 22: ...SEG0 SEG1 OUT Terminal not used 34 SEG2 OUT Magnetron high voltage circuit driving signal To turn on and off the cook relay RY2 The signals holds L level during micro wave cooking and H level while not cook ing In other cooking modes variable cook ing thesignalturnsto H leveland L level in repetition according to the power level 35 SEG3 OUT Terminal not used 36 SEG4 OUT Oven lamp fan motor and tur...

Page 23: ...ven itself is so short that the two can t be separated For those models check and repair all the controls sensor relatedonesincluded ofthetouchcontrolpanel 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 so long enough that they may be separated from each other For thosemodels therefore itispossibletocheckandrepai...

Page 24: ...gh voltage capacitor and High voltage rectifier assembly 2 Hot parts Oven lamp Magnetron High voltage transformer WARNING FOR WIRING 1 Disconnect the power supply cord 2 Visuallycheckthedoorandcavityfaceplatefordamage dents cracks signs of arcing etc Carry out any remedial work that is necessary before operating the oven Do not operate the oven if any of the following conditions exist 1 Door does ...

Page 25: ...OMPONENTS REMOVAL HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY POWER TRANSFORMER REMOVAL 1 Disconnect the power supply cord and remove outer case 2 Open the oven door and block it open 3 Discharge high voltage capacitor 4 Disconnect the wire leads main wire harness and H V wire from power transformer 5 Disconnect the lead from magnetron filament 6 Disconnect the lead of the power tra...

Page 26: ...ges holding the turntable motor cover to the bottom plate with the cutting pliers as shown in Figure C 3 CAUTION DO NOT DROP THE TURNTABLE MOTOR COVER INTO THE OVEN AFTER CUTTING THE BRIDGES BECAUSE IT WILL DAMAGE THE WIRE LEADS OF THE MOTOR AND IT IS DIFFICULT TO REMOVE IT OUT OF THE OVEN 5 Removetheturntablemotorcoverfromthebottomplate 6 Disconnect the wire leads from the turntable motor 7 Remov...

Page 27: ...pports the shaft of the fan motor on the flat table 4 Apply the screw lock tight into the hole for shaft of the fan blade 5 Install the fan blade to the shaft of fan motor by pushing thefanbladewithasmall lightweight ballpeenhammer or rubber mallet CAUTION Do not hit the fan blade strongly when installed because the bracket may be transformed Make sure that the fan blade rotates smooth after insta...

Page 28: ...when the door is opened 4 Re install outer case and check for microwave leakage around the door with an approved microwave survey meter Refer to Microwave Measurement Procedure Figure C 6 Latch Switch Adjustments switch But the switch will be caught by the bar of the latch hook 8 2 Thenpullouttheswitchwhilepushingtheplungerofthe switch again 8 3 Now the secondary interlock switch is free 9 To remo...

Page 29: ...Procedures B An approved microwave survey meter should be used to assure compliance with proper microwave radiation emission limitation standards After any service make sure of the following 1 Door latch heads smoothly catch latch hook through latch holes and that latch head goes through center of latch hole 2 Deviation of door alignment from horizontal line of cavity face plate is to be less than...

Page 30: ...CORD 120V 60Hz GRD H N NOTE The grounding conductor of the power supply cord has been grounded by power supply cord fixing screw The screw must always be kept tight NOTE The neutral WHT wire must be connected to the terminal with N mark on the power supply cord RED WHT DOOR SENSING SWITCH GRY RED POWER TRANSFORMER HIGH VOLTAGE WIRE B BLK Blue Mark NOTE Hot RED wire must be connected to the termina...

Page 31: ... 16v C21 10µ 35v R10 15k R50 20kF R20 15k R6 15k R5 1k HZ4C3 ZD1 C3 0 01µ 25v C40 0 01µ 25v C5 0 1µ 25v C6 0 1µ 25v C7 0 1µ 25v C4 S12 SEG19 VC3 B Z R00 R01 R02 R03 P20 P21 P22 P23 K00 K01 K02 K03 COM0 COM1 VC2 VC1 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 S11 S10 S 9 S 8 S 7 S 6 S 5 S 4 S 3 S 2 S 1 C 1 C 2 C 3 0 01µ 25v C11 0 01µ 25v SP1 PKM22EPT D20 J1 D21 RY2 AC120V 60Hz OVEN LAMP TURNTABLE MOTOR FAN...

Page 32: ... 16v C21 10µ 35v R10 15k R50 20kF R20 15k R6 15k R5 1k HZ4C3 ZD1 C3 0 01µ 25v C40 0 01µ 25v C5 0 1µ 25v C6 0 1µ 25v C7 0 1µ 25v C4 S12 SEG19 VC3 B Z R00 R01 R02 R03 P20 P21 P22 P23 K00 K01 K02 K03 COM0 COM1 VC2 VC1 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 S11 S10 S 9 S 8 S 7 S 6 S 5 S 4 S 3 S 2 S 1 C 1 C 2 C 3 0 01µ 25v C11 0 01µ 25v SP1 PKM22EPT D20 J1 D21 RY2 AC120V 60Hz OVEN LAMP TURNTABLE MOTOR FAN...

Page 33: ...DW 1 BA 3 1 DPWBFC028WRUZ Control unit R 230DK 1 BA 3 1 DPWBFC028WRUZ Control unit R 230DW 1 BA 3 2 FPNLCB477WRKZ Control panel frame with key unit and LCD R 220DW 1 BB 3 2 FPNLCB481WRKZ Control panel frame with key unit and LCD R 230DW 1 BB 3 2 FPNLCB482WRKZ Control panel frame with key unit and LCD R 230DK 1 BB 3 2 1 FUNTKA972WREZ Key unit R 220DW 1 AT 3 2 1 FUNTKA976WREZ Key unit R 230DW 1 AT 3...

Page 34: ...6 8 TCAUAA156WRR0 User caution label R 230DW 1 AF 6 9 TCAUAA257WRRZ Monitor caution 1 AC 6 10 TCAUAA253WRR0 Earth caution 2 AC 6 11 TCAUAA240WRR0 Screw caution 1 AC SCREWS AND WASHERS 7 1 XHPSD40P08K00 Screw 4mm x 8mm 5 AA 7 2 LX EZA042WRE0 Special screw 2 AB 7 3 LX WZA028WRE0 Special washer 1 AB 7 4 XHTSD40P12RV0 Screw 4mm x 12mm 1 AA 7 5 XHTSD40P08RV0 Screw 4mm x 8mm 5 AA 7 6 XHPSD30P06000 Screw...

Page 35: ...PARTS 7 8 2 1 7 8 7 10 7 10 7 9 7 5 7 5 A 4 6 4 4 4 9 7 1 7 8 7 7 4 10 7 1 1 12 7 8 7 8 7 8 4 1 2 2 2 3 7 8 7 8 7 8 4 13 2 3 7 2 4 16 7 3 1 10 6 11 1 11 7 5 7 4 1 3 1 7 7 6 1 1 1 1 1 2 1 6 4 3 1 5 7 9 7 1 1 8 6 10 6 10 6 9 1 2 7 8 1 9 1 4 4 3 4 2 4 14 4 14 4 7 4 11 6 2 6 1 4 15 4 8 6 7 4 5 4 12 4 17 A ...

Page 36: ...leaned by ethyl alcohol 6 4 5 1 2 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H MISCELLANEOUS CONTROL PANEL PARTS DOOR PARTS 2000 SHARP CORP 3S2 530E Printed in U S A COPYRIGHT 2000 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 pho tocopying recording or otherwise w...

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