Sharp R-201FK Service Manual Download Page 30

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R-201FK/W
R-203FW
R-205FW
R-206FW

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

GRN

GRY

ORG

WHT

COM

N.O.

GRY

Summary of Contents for R-201FK

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: ...eneration 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 th...

Page 3: ...h voltage 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 capacit...

Page 4: ... center 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 Pow...

Page 5: ...t defective C The 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 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...

Page 6: ... 1100W Approx 9 6 Amperes Power Output 700 W nominal of RF microwave energy IEC Test procedure Operating frequency 2450 MHz Case Dimensions Width 18 1 8 Height 10 7 8 Depth 13 7 8 Cooking Cavity Dimensions Width 12 5 8 0 7 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 ...

Page 7: ...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 oven floor 8 Removable turntable Place the turntable securely on the turntable support The turntable will r...

Page 8: ...ng 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 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 d...

Page 9: ...OWER 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 ...

Page 10: ...AUTION 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 coo...

Page 11: ...27WRKZ 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...

Page 12: ...ows when 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 ...

Page 13: ...ured 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 accurate resu...

Page 14: ...ow through 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...

Page 15: ...n and 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...

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

Page 17: ...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 when the STOP CLEAR pad is depressed first verify the flat ribbon cable is making good contact verify that the door sensing ...

Page 18: ...eter 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 RELAY SYMBOL OPERATIONAL VOLTAGE ...

Page 19: ...emove 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 CORRE...

Page 20: ...itial 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 bas...

Page 21: ... 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 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 ...

Page 22: ...e 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 ci...

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

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

Page 25: ...REW CAUTION DO NOT REPLACE ONLY HIGH VOLTAGE 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...

Page 26: ...t from 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 membr...

Page 27: ...holding 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 t...

Page 28: ...or Sensing Switch Monitor Switch Switch Lever Secondary Interlock Switch REMOVAL 1 Disconnect the power supply 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 c...

Page 29: ...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 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 Pro...

Page 30: ...RY RED 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...

Page 31: ...5v 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 J1 D20 D21 D22 J10 J11 J12 J13 J14 J15 VRS1 10G471K R4 910 1 2w R41 15k R40 4 7k R75 220k R76 220k R77 220k R78 220k SP1 D40 IF NOT SPECIFIED 1 10W 5 IF NOT SPECIFIE...

Page 32: ...88WRK0 High voltage rectifier assy Interchangeable 1 AP 1 5 RC PZA041WRE0 High voltage capacitor 1 AS 1 5 RC QZA307WRZZ High voltage capacitor Interchangeable 1 AX 1 5 RC QZA308WRZZ High voltage capacitor Interchangeable 1 AN 1 6 RMOTEA383WRE0 Fan motor 1 AV 1 6 RMOTEA355WRE0 Fan motor Interchangeable 1 AU 1 6 RMOTEA408WRZZ Fan motor Interchangeable for production use 1 1 7 RV MZA226WRE0 Magnetron...

Page 33: ...an 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 GWAKPA854WRRZ Door frame R 201FK 1 AW 5 ...

Page 34: ...it to Control panel foil side of Control unit must be cleaned by ethyl alcohol 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 shou...

Page 35: ... 4 5 1 2 3 A B C D E F G H A B C D E F G H 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 4 8 4 4 7 7 7 4 4 9 ...

Page 36: ...chanical photocopying record ing or otherwise without prior written per mission of the publisher PACKING AND ACCESSORIES SPAKCD701WREZ R 201FW SPAKCD732WREZ R 201FK FPAK A420WRKZ R 203FW FPAK A429WRKZ R 205FW SPAKCD730WREZ R 206FW 6 1 TURNTABLE TRAY 6 5 INSTRUCTION BOOK 6 2 TURNRTABLE SUPPORT INTO THE OVEN CAVITY Not replaceable items TRAY PAD ASSY CPADBA287WRKZ PACKING CASE MICROWAVE OVEN TOP PAD...

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