Sharp R-209HK Service Manual Download Page 9

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R-209HK
R-209HW

Figure O-1. Oven Schematic-Off Condition

SCHEMATIC

NOTE: CONDITION OF OVEN
1.

DOOR CLOSED

CLOCK APPEARS ON DISPLAY

SCHEMATIC

NOTE: CONDITION OF OVEN
1.

DOOR CLOSED

COOKING TIME PROGRAMMED

VARIABLE COOKING CONTROL "P-HI"

"START" PAD TOUCHED

Figure O-2. Oven Schematic-Cooking Condition

NOTE: " " indicates components with potentials above 250V.

POWER
TRANSFORMER

RECTIFIER

MAGNETRON

CAPACITOR
0.82

AC2100V

C/T FUSE

120V AC
60 Hz

OVEN
LAMP

TURN-
TABLE
MOTOR

FAN
MOTOR

MONITOR
SWITCH

SECONDARY
INTERLOCK
SWITCH

TTM

GRN

COM.

DOOR
SENSING
SWITCH

(RY-1)

(RY-2)

CONTROL UNIT

PRIMARY
INTERLOCK
RELAY

N.O.

TEMPERATURE
FUSE (OVEN)

POWER
TRANSFORMER

RECTIFIER

CAPACITOR
0.82

AC2100V

C/T FUSE

120V AC
60 Hz

OVEN
LAMP

TURN-
TABLE
MOTOR

FAN
MOTOR

MONITOR
SWITCH

SECONDARY
INTERLOCK
SWITCH

TTM

GRN

N.O.

COM.

DOOR
SENSING
SWITCH

(RY-1)

(RY-2)

CONTROL UNIT

PRIMARY
INTERLOCK
RELAY

TEMPERATURE
FUSE (OVEN)

MAGNETRON

Summary of Contents for R-209HK

Page 1: ...AUTIONS 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 17 COMPONENT REPLACEMENT AND...

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: ... 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 Reco...

Page 4: ...ty 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 Close ...

Page 5: ... 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 energized High Volt...

Page 6: ...cy 2450 MHz Case Dimensions Width 18 1 8 Height 10 7 8 Depth 14 1 4 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 appro...

Page 7: ...DER ANY 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 ...

Page 8: ...tor 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 opens...

Page 9: ...SFORMER 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 MONITOR S...

Page 10: ...FORE 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 evenl...

Page 11: ... 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 powe...

Page 12: ...s plugged into wall receptacle C T fuse blows 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 el...

Page 13: ...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 results the following procedure must be followed carefully 1 Fill the measuring cup with 16 oz 453cc of tap water and measure the tem...

Page 14: ...avity 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 4 Isolate the rectifier from the circuit Using the highest ohm scale of the meter read the resistance across the terminals and observe reverse the lea...

Page 15: ...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 PRIMARY INTERLOCK RELAY RY2 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 two 2 wire leads from the male tab te...

Page 16: ...e connect the power supply cord 1 Key Unit NOTE 1 Check key unit ribbon connection before replacement 2 Re install the outer case cabinet 3 Reconnect the power supply cord after the outer case is installed 4 Run the oven and check all functions The following symptoms indicate a defective key unit a When touching the pads a certain pad produces no signal at all b When touching a number pad two figu...

Page 17: ...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 1 2 3 4 5 6 7 8 9 0 POWER LEVEL MINUTE PLUS COOK DEFROST POPCORN REHEAT START TIMER CLOCK G 1 G 2 G 3 G 4 G 5 G 6 G 7 G 8 G 9 G10 STOP CLEAR Pin NO G1 Pin NO G10 Key unit ribbon cable Key unit Membrane Switch front view 1 Disconnect the power supply...

Page 18: ... the PWB this foil pattern acts as a fuse 1 Foil pattern check and repairs 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 Follow the troubleshooting guide given below for repair STEPS OCCURRENCE CAUSE OR CORRECTION 1 Only pattern at a is broken Insert jumper wire J1 and solder 2 Pattern at a and b are broken Inse...

Page 19: ...01 R02 R03 R20 and R21 When a key pad is touched a signal is completed through the key unit and passed back to the LSI through R23 K00 K01 and K02 to perform the function that was requested Control Unit Control unit consists of LSI reset circuit indicator circuit power source circuit relay circuit buzzer circuit and synchronizing signal circuit 1 Reset Circuit This circuit generates a signal which...

Page 20: ...ates 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 key...

Page 21: ... 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 cir...

Page 22: ...self 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 check an...

Page 23: ...inite 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 necessary...

Page 24: ...LACING 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 Disconnect the lead from magn...

Page 25: ...m 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 switch to the small depression on the surface of the control panel frame 5 Attach the membrane switch to the control panel frame by rubbing with a soft cloth not to scratch 6 Tear the backing paper from the new graphic sheet 7 Ad...

Page 26: ...NSTALLATION 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 fan blade to the shaft of fan motor by pushing the fan blade with...

Page 27: ...g 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 cover from...

Page 28: ...tch 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 Procedure No...

Page 29: ...T 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 C T ...

Page 30: ...EG14 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 10G471K...

Page 31: ...4 5 1 2 3 A B C D E F G H A B C D E F G H Figure S 3 Printed Wiring Board DIP CN B C21 T1 S D2 P J1 1 C8 2 5 E Q22 B 2 1 SP1 Q21 J12 J13 J14 J15 E C2 R4 3 4 ZD1 D3 D4 D1 VRS1 RY2 RY1 CN A 1 3 J11 J10 D20 D21 D40 D22 CHIP SIDE UNIT CODE ...

Page 32: ...1 11 RTRN A659WRZZ Power transformer Interchangeable for production use 1 CABINET PARTS 2 1 GCABUA828WRPZ Outer case cabinet R 209HK 1 BD 2 1 GCABUA817WRPZ Outer case cabinet R 209HW 1 BD 2 2 GLEGPA074WRE0 Foot 2 AC 2 3 PCUSUA605WRPZ Cushion 1 AG CONTROL PANEL PARTS 3 1 FPNLCB706WRKZ Control panel frame with key unit R 209HW 1 3 1 FPNLCB707WRKZ Control panel frame with key unit R 209HK 1 BA 3 1 1 ...

Page 33: ...LAB A183WRR0 Service label 1 AB SCREWS NUTS AND WASHERS 7 1 XHPSD40P08K00 screw 4 mm x 8 mm 2 AC 7 2 XHTSD40P08RV0 Screw 4mm x 8mm 4 AA 7 3 LX CZA070WRE0 Special screw Torx tamper pfoof screw 2 AC 7 4 LX CZ0052WRE0 Special screw 2 AA 7 5 LX EZA042WRE0 Special screw 2 AB 7 6 XHPSD30P06000 Screw 3mm x 6mm 1 AA 7 7 XHPSD40P08000 Screw 4mm x 8mm 3 AA 7 8 XHTSD40P12RV0 Screw 4mm x 12mm 1 AA 7 9 XOTSF40...

Page 34: ...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 2 3 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 6 7 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 7 10 4 9 ...

Page 35: ...NTROL PANEL PARTS DOOR PARTS MISCELLANEOUS 5 2 6 6 5 5 5 3 5 4 5 6 5 7 5 1 5 8 Actual wire harness may be different than illustration 3 2 3 1 1 3 1 3 6 3 7 3 5 3 4 3 3 3 1 2 Before attaching Control unit to Control panel foil side of Control unit must be cleaned by ethyl alcohol ...

Page 36: ...2003 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 photocopying recording or otherwise without prior written permission of the publisher ...

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