Sharp Carousel R-203HW Service Manual Download Page 30

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R-203HW

R-220HW

R-230HW

Figure S-1. Pictorial Diagram

WHT

RED

WHT

HIGH VOLTAGE COMPONENTS

MAGNETRON

(RED)

(WHT)

(RED)

HIGH
VOLTAGE
CAPACITOR

H.V.
RECTIFIER

MONITOR
SWITCH

TURNTABLE
MOTOR

FAN MOTOR

OVEN LAMP

GRY

SECONDARY
INTERLOCK SWITCH

COM

ORG

GRY

ORG

N.C.

N.O.

COM

GRY

GRN

GRY

RED

WHT

TEMPERATURE
FUSE (OVEN)

POWER SUPPLY CORD
120V 60Hz

GRD

NOTE:
The grounding conductor of
the power supply cord has
been grounded by power
supply cord fixing screw.
The screw must allways 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

RED

POWER
TRANSFORMER

BLK

WHT

GRN

CONTROL PANEL

GRY

ORG

WHT

RED

C/T FUSE

BLK

RY1

PRIMARY
INTERLOCK
RELAY

CN-B

CN-A

N.O.

COM.

RY2

ORG

RED

ORG

WHT

CN-A

ORG

CN-B

2
1

GRN

GRY

ORG

WHT

COM

N.O.

GRY

Summary of Contents for Carousel R-203HW

Page 1: ...ONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY INSIDE FRONT COVER BEFORE SERVICING 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 ADJ...

Page 2: ...ion 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 Micr...

Page 3: ...tage 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 ...

Page 4: ...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 Mode 5 Cl...

Page 5: ...r 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 Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing Service personnel Do not contact the following parts while the appliance is energiz...

Page 6: ...quency 2450 MHz Case Dimensions Width 18 1 8 Height 10 7 8 Depth 14 1 8 Cooking Cavity Dimensions Width 12 5 8 0 8 Cubic feet Height 7 7 8 Depth 13 1 4 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 a...

Page 7: ...Y CIRCUMSTANCES CUT OR REMOVE THE ROUND GROUNDING PRONG FROM THIS PLUG OVEN DIAGRAM 1 Door open button Push to open door 2 Oven door with see through window 3 Safety door latches The oven will not operate unless the door is securely closed 4 Door hinges 5 Door seals and sealing surfaces 6 Turntable motor shaft 7 Removable turntable support Carefully place the turntable support in the center of the...

Page 8: ...n 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 The monitor switch is electrically monitoring the operation of the secondary interlock switch and primary interlock relay RY2 and is mechanically associated with the door so that it will function in the following sequence 1 When the door o...

Page 9: ...TRANSFORMER RECTIFIER MAGNETRON CAPACITOR 0 82µF AC2100V 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 DOOR SENSING SWITCH B2 B1 RY 1 RY 2 CONTROL UNIT PRIMARY INTERLOCK RELAY A1 N O TEMPERATURE FUSE OVEN POWER TRANSFORMER RECTIFIER CAPACITOR 0 82µF AC2100V C T FUSE 120V AC 60 Hz OVEN LAMP TURN TABLE MOTOR FAN MOTOR MONIT...

Page 10: ...N BEFORE REPLACING A BLOWN C T FUSE TEST THE DOOR SENSING SWITCH PRI MARY INTERLOCK RELAY 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 e...

Page 11: ...Z 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: ...hen power cord is plugged into wall receptacle Any letters or 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 l...

Page 13: ...be measured by performing a water temperature rise test This test should only be used if above tests do not indicate a faulty magnetron and there is no defect in the following components or wiring silicon rectifier high voltage capacitor and power transformer This test will require a 16 ounce 453cc measuring cup and an accurate mercury thermometer or thermocouple type temperature tester For accura...

Page 14: ...rough the vent holes of the oven cavity especially the cooling fan and 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 C HIGH VOLTAGE RECTIFIER TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and bloc...

Page 15: ... check all functions 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 Isolate the switch and connect the ohmmeter to the common COM and normally open NO terminal of the switch The meter should indicate an open circuit with the ...

Page 16: ...stall 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 maintenance cannot be performed with only a voltmeter and ohmmeter In this service manual the touch control panel assembl...

Page 17: ...y cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Reconnect all leads removed from 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...

Page 18: ... 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 diode is good control unit is defective ...

Page 19: ... 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 procedure re connect the power supply cord 7 Follow the troubleshooting guide given below for repair STEPS OCCURRENCE CAUSE OR CORRECTION...

Page 20: ... state when power is supplied 2 Indicator Circuit This circuit consists of 4 digits 12 segments and 3 common electrodes using a Liquid Crystal Display TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL 3 Power Source Circuit This circuit generates voltage necessary in the control unit from the AC line voltage In addition the synchronizing signal is available in order to compose a basic st...

Page 21: ...unicates 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 applied to touch key section A pulse signal is input to P23 K00 K01 and K02 terminal while one of G1 line keys on key matrix is touched 17 R01 OUT Key strobe signal Signal applied to touch...

Page 22: ... The signals holds L level during micro wave cooking and H level while not cooking In other cooking modes variable cooking the signal turns to H level and L level in repetition according to the power level 35 SEG3 OUT Terminal not used 36 SEG4 OUT Oven lamp fan motor and turntable motor driving signal To turn on and off shut off relay RY1 The square waveform voltage is delivered to the RY1 driving...

Page 23: ...n 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 so long enough that they may be separated from each other For those models therefore it is possible to chec...

Page 24: ... 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 Visually check the door and cavity face plate for damage dents cracks signs of arcing etc Carry out any remedial work that is neces...

Page 25: ...E RECTIFIER WHEN REPLACING IT RE PLACE HIGH VOLTAGE RECTIFIER ASSEM BLY HIGH VOLTAGE COMPONENTS 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 from power transformer 5 Disconnec...

Page 26: ...m the control panel frame 8 Tear away the membrane switch from the control panel frame Installation 1 Remove remaining adhesive on the control panel frame surfaces with a soft cloth soaked in alcohol 2 Tear the backing paper from the new membrane switch 3 Insert the ribbon cable of the membrane switch into the slit of the control panel frame 4 Adjust the upper edge and right edge of the membrane s...

Page 27: ...ng the fan motor to the fan duct 16 Now the fan motor is free INSTALLATION 1 Install the fan motor to the fan duct with the two 2 screws 2 Install the fan blade to the fan motor shaft according to the following procedure 3 Hold the center of the bracket which supports 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 fa...

Page 28: ...ly cord 2 Open the door slightly 3 Insert a putty knife thickness of about 0 5mm into the gap between the choke cover and corner portion of door panel as shown in Figure C 5 to free engaging parts 4 Pry the choke cover by inserting a putty knife in order shown in figure C 5 5 Release choke cover from door panel 6 Now choke cover is free NOTE When carrying out any repair to the door do not bend or ...

Page 29: ...r 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 1 0mm 3 Door is positioned with its face pressed toward cavity face plate 4 Check for microwave leakage around door with an approved microwave survey meter Refer to Microwave Measurement Procedur...

Page 30: ...D WHT TEMPERATURE FUSE OVEN POWER SUPPLY 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 allways 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 RED POWER TRANSFORMER BLK WHT GRN CONTROL PANEL GRY ORG ORG WHT RED ...

Page 31: ...M1 SEG14 SEG13 R01 R02 R03 P20 P21 P22 P23 K00 K01 K02 K03 COM0 COM1 AVSS P40 P41 P42 P43 C2 470µ 25v C21 10µ 35v C8 220µ 10v R5 1k R30 3 3k R20 15k R10 15k R50 20kF R6 15k C10 0 1µ 25v C4 0 01µ 25v C20 0 1µ 25v C5 0 1µ 25v C7 0 1µ 25v C6 0 1µ 25v 1 14 15 29 45 54 30 44 C3 0 01µ 25v C40 0 01µ 25v C11 0 01µ 25v C1 0 1µ 25v ZD1 HZ4B3 20k 1 4w 9 1k 1 4w J1 D20 D21 D22 J10 J11 J12 J13 J14 J15 VRS1 10G...

Page 32: ...ply cord 1 AN 1 3 FACCDA081WRE0 Power supply cord Interchangeable 1 AP 1 3 FACCDA082WRE0 Power supply cord Interchangeable 1 AV 1 3 FACCDA089WRE0 Power supply cord Interchangeable 1 1 4 FH DZA106WRKZ High voltage rectifier assy 1 1 4 FH DZA102WRKZ High voltage rectifier assy Interchangeable 1 AN 1 4 FH DZA088WRK0 High voltage rectifier assy Interchangeable 1 AP 1 5 RC PZA308WRZZ High voltage capac...

Page 33: ...UC A801WRWZ Fan duct 1 AR 4 5 Oven cavity Not replaceable part 1 4 6 GCOVHA425WRPZ Turntable motor cover 1 AK 4 7 MLEVPA241WRFZ Switch lever 1 AG 4 8 PCOVPA276WRE0 Waveguide cover 1 AM 4 9 PCUSUA237WRP0 Cushion 2 AF 4 10 PPACGA176WREZ TTM packing 1 AC 4 11 PCUSUA278WRP0 Cushion 1 AB 4 12 PCUSGA568WREZ Cushion 1 AC DOORPARTS 5 1 FDORFA348WRTZ Door panel assembly 1 BC 5 2 GWAKPA888WRFZ Door frame 1 ...

Page 34: ... 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 CONTROL PANEL PARTS DOOR PARTS MISCELLANEOUS 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 Order Parts from the authorized SHARP parts Distributor for your area Defective parts requiring return should be...

Page 35: ...D E F G H OVEN AND CABINET PARTS 7 10 2 1 7 10 7 10 7 3 7 3 1 8 6 4 6 3 7 8 1 3 4 3 7 6 7 5 2 2 4 7 4 10 4 2 7 10 4 11 7 11 6 1 6 2 7 2 7 10 7 10 7 9 7 9 1 6 1 11 7 1 4 5 1 2 7 10 4 12 7 2 7 1 1 5 1 1 1 2 1 1 1 9 1 4 4 1 7 2 2 2 4 6 1 7 1 10 4 9 2 3 4 8 4 4 7 7 7 4 7 10 4 9 ...

Page 36: ...ns elec tronic mechanical photocopying record ing or otherwise without prior written per mission of the publisher PACKING AND ACCESSORIES FPAK A450WRKZ R 203HW FPAK A475WRKZ R 220HW FPAK A476WRKZ R 230HW 6 1 TURNTABLE TRAY 6 5 INSTRUCTION BOOK 6 2 TURNRTABLE SUPPORT INTO THE OVEN CAVITY Not replaceable items TRAY PAD ASSY CPADBA296WRKZ PACKING CASE MICROWAVE OVEN TOP PAD ASSEMBLY FPADBA518WRKZ POL...

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