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R-230F

31

In interests of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.

MODEL

R-230F

S1202R230FPJ/

MICROWAVE OVEN

TABLE OF CONTENTS

Page

CAUTION, MICROWAVE RADIATION .............................................................................................................  1
WARNING .......................................................................................................................................................... 1
PRODUCT SPECIFICATIONS .........................................................................................................................  2
GENERAL INFORMATION ................................................................................................................................ 2
APPEARANCE VIEW .......................................................................................................................................  3
OPERATION SEQUENCE ................................................................................................................................  4
FUNCTION OF IMPORTANT COMPONENTS ................................................................................................   5
SERVICING ....................................................................................................................................................... 6
TEST PROCEDURE .........................................................................................................................................  8
TOUCH CONTROL PANEL ............................................................................................................................. 13
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ...........................................................  17
MICROWAVE MEASUREMENT ....................................................................................................................  23
WIRING DIAGRAM .........................................................................................................................................  24
PICTORIAL DIAGRAM ...................................................................................................................................  25
CONTROL PANEL CIRCUIT ........................................................................................................................... 26
PRINTED WIRING BOARD ............................................................................................................................. 27
PARTS LIST ...................................................................................................................................................  27

SHARP CORPORATION

SERVICE MANUAL

1.Steak/Chops 2.Roast Meat
3.Poultry 4.Chicken Pieces

1.Fish Fillets 2.Chicken Fillets
3.Sausages / Minced Meat

1
2
3
...
»

Summary of Contents for R-230F

Page 1: ...IONS 2 GENERAL INFORMATION 2 APPEARANCE VIEW 3 OPERATION SEQUENCE 4 FUNCTION OF IMPORTANT COMPONENTS 5 SERVICING 6 TEST PROCEDURE 8 TOUCH CONTROL PANEL 13 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 17 MICROWAVE MEASUREMENT 23 WIRING DIAGRAM 24 PICTORIAL DIAGRAM 25 CONTROL PANEL CIRCUIT 26 PRINTED WIRING BOARD 27 PARTS LIST 27 SHARP CORPORATION SERVICE MANUAL 1 Steak Chops 2 Roast Meat 3 Poultr...

Page 2: ...R 230F 32 ...

Page 3: ...t a microwave energy absorbing load attached Never look into an open waveguide or antenna while the device is energized 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 not any other visible damage with the oven Servici...

Page 4: ...e Dimensions Width 460 mm Height 275 mm including foot Depth 353 mm Cooking Cavity Dimensions Width 322 mm Height 212 mm Depth 336 mm Turntable diameter 295 mm Control Complement Touch Control System Timer 0 99 minutes 99 seconds Microwave Power for Variable Cooking Repetition Rate 100P Full power throughout the cooking time 70P approx 70 of FULL Power 50P approx 50 of FULL Power 30P approx 30 of ...

Page 5: ...ter the cooking result for automatic opera tions 6 TIMER CLOCK PAD Press to set clock timer child lock or demonstration mode 7 STOP CLEAR PAD Press to clear during programming Press once to stop operation of oven during cooking press twice to cancel cooking programme 8 INSTANT COOK START PAD Press once to cook for 1 minute at 100 or increase by 1 minute multiples each time this pad is pressed duri...

Page 6: ...ch switch COM NO Closed Open 2nd interlock relay control switch COM NO Closed Open Monitor switch COM NC Open Closed The circuits to the power transformer fan motor and turntable motor are cut off when the 1st latch switch and 2nd interlock relay control switch are made open The oven lamp remains on even if the oven door is opened after the cooking cycle has been interrupted because the relay RY1 ...

Page 7: ...n button pushes up the switch lever and then the switch lever pushes up the latch head The latch heads are moved upward and released from latch hook Now the door will open Figure D 1 Door Open Mechanism 1ST LATCH SWITCH AND 2ND INTERLOCK RELAY CONTROL SWITCH 1 When the oven door is closed the contacts COM NO must be closed 2 When the oven door is opened the contacts COM NO must be opened MONITOR S...

Page 8: ...leted carry out 3D checks and recon nect the leads to the primary of the power transformer REMEMBER TO CHECK 4R 1 Reconnect all leads removed from components during testing 2 Replace the outer case cabinet 3 Reconnect the supply 4 Run the oven Check all functions Microwave ovens should not be run empty To test for the presence of microwave energy within a cavity place a cup of cold water on the ov...

Page 9: ...utlet Display does not operate prop erly when STOP CLEAR pad is touched Oven lamp does not light at door opened Display ap pears Oven does not start when the START pad is touched Dis play appears Oven lamp does not light Dis play appears Fan motor does not operate Display appears Turntable motor does not oper ate Display appears Oven or any electrical parts does not stop when cooking time is 0 or ...

Page 10: ...he start of the test 3 Temperature of the water The initial temperature of the water is 10 1 C 4 Select the initial and final water temperature so that the maximum difference between the final water temperature and the ambient temperature is 5 C 5 Select stirring devices and measuring instruments in order to minimize addition or removal of heat 6 The graduation of the thermometer must be scaled by...

Page 11: ...e equation is P 80 x T P 80 x 10 C 800 Watts JUDGEMENT The measured output power should be at least 15 of the rated output power CAUTION 1 C CORRESPONDS TO 80 WATTS REPEAT MEASUREMENT IF THE POWER IS INSUFFICIENT a Primary winding 2 5 ohms approximately b Secondary winding 176 ohms approximately c Filament winding less than 1 ohm C HIGH VOLTAGE RECTIFIER ASSEMBLY TEST HIGH VOLTAGE RECTIFIER TEST C...

Page 12: ...minal NO Normally open terminal NC Normally close terminal S C Short circuit O C Open circuit If incorrect readings are obtained make the necessary switch adjustment or replace the switch CARRY OUT 4R CHECKS F TEMPERATURE FUSE TEST CARRY OUT 3D CHECKS Disconnect the leads from the terminals of the temperature fuse Then using an ohmmeter make a continuity test across the two terminals as described ...

Page 13: ...SE WITH THE CORRECT VALUE REPLACE MENT FUSE T6 3A N L LINE CROSS CAPACITOR 0 068µ AC250V NOISE SUPPRESSION COIL LINE BYPASS CAPACITOR 0 0022µ AC250V LINE BYPASS CAPACITOR 0 0022µ AC250V NOISE FILTER WHT RED K TOUCH CONTROL PANEL ASSEMBLY TEST The touch control panel consists of circuits including semiconductors such as LSI ICs etc Therefore unlike conventional microwave ovens proper maintenance ca...

Page 14: ...unit is faulty and must be replaced If the control unit does not respond it is faulty and must be replaced If a specific pad does not respond the above method may be used after clearing the control unit to determine if the control unit or key pad is at fault CARRY OUT 3D CHECKS Remove the outer case and check voltage between Pin No 3 of the 2 pin connector A and normal open terminal of the relay R...

Page 15: ...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 resets the LSI to the initial state w...

Page 16: ... 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 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...

Page 17: ...and off the cook relay RY2 The signals holds L level during microwave 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 del...

Page 18: ... models the power supply cord be tween the touch control panel and the oven proper is so long enough that they may be separated from each other SERVICING For those models therefore it is possible to check and repair the controls of the touch control panel while keeping it apart from the oven proper in this case you must short both ends of the door sensing switch on PWB of the touch control panel w...

Page 19: ... the right side of the outer case 4 Remove the remaining five 5 screws from the rear of the outer case 5 Slide the entire outer case back out about 1 inch 3 cm to free it from retaining clips on the cavity face plate 6 Lift entire outer case from the unit 7 Discharge the H V capacitor before curring out any 1 Disconnect the supply 2 Door opened and wedged open 3 Discharge high voltage capacitor To...

Page 20: ...the power transformer from high voltage capacitor 5 Remove the two 2 screws holding the transformer to bottom plate from the upper side 6 Remove the remaining two 2 screws from the bottom 7 Remove the transformer 8 Now the power transformer is free POWER TRANSFORMER REMOVAL Re install 1 Rest transformer on the bottom plate with its primary terminals toward the oven face plate 2 Secure transformer ...

Page 21: ...heet to the large depression on the surface of the control panel frame 8 Attach the graphic sheet to the control panel frame by rubbing with a soft cloth not to scratch 9 Tear the small backing paper from the ribbon cable of the membrane switch 10 Attach the ribbon cable to the control panel frame rear side 11 Place the edge of the membrane switch s ribbon cable on the lower portion of the liquid ...

Page 22: ... fan motor by pulling and rotating the fan blade with your hand 10 Now the fan blade will be free CAUTION Do not re use the removed fan blade because the hole for shaft may be larger than normal 11 Remove the two 2 screws holding the fan motor to the fan duct 12 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 m...

Page 23: ...TCH AND MONITOR SWITCH REMOVAL 1 CARRY OUT 3D CHECKS 2 Disconnect wire leads from the switches 3 Remove two 2 screws holding latch hook to oven flange 4 Remove the switch lever from the oven cavity 5 Remove latch hook assembly from oven flange 6 Push outward on the two 2 retaining tabs holding switch in place 7 Switch is now free Re install 1 Re install each switch in its place The 1st latch switc...

Page 24: ... with proper micro wave 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 1 0mm 3 Door is positioned with its face pressed toward cavity face plate 4 Check...

Page 25: ...rowave ovens must be used for test ing Recommended instruments are NARDA 8100 NARDA 8200 HOLADAY HI 1500 SIMPSON 380M 2 Place the oven tray into the oven cavity 3 Place the load of 275 15ml of water initially at 20 5 C in the centre of the oven tray The water container should be a low form of 600 ml beaker with inside diameter of approx 8 5cm and made of an electrically non conductive material suc...

Page 26: ...0Hz BLU BRN LIVE NEUTRAL G Y FUSE T6 3A N L LINE CROSS CAPACITOR 0 068µ AC250V NOISE SUPPRESSION COIL LINE BYPASS CAPACITOR 0 0022µ AC250V LINE BYPASS CAPACITOR 0 0022µ AC250V NOISE FILTER H V FUSE 0 6A CAPACITOR 0 91µF AC2100V TEMPERATURE FUSE120 C OVEN POWER TRANSFORMER MAGNETRON H V RECTIFIER TURNTABLE MOTOR FAN MOTOR OVEN LAMP MONITOR SWITCH CONTROL UNIT 1ST LATCH SWITCH 2ND INTERLOCK RELAY CO...

Page 27: ...OM ORG GRY N RED WHT L GRY GRY N C N O GRY GRY Cabinet side Front side RED WHT 2ND INTERLOCK RELAY CONTROL SWITCH RED POWER TRANSFORMER HIGH VOLTAGE FUSE G Y B L U B R N EARTH LIVE N E U T R A L POWER SUPPLY CORD NOISE FILTER OVEN CAVITY BACK PLATE GRN GRY WHT WHT GRY GRY ORG RED GRY CN A CN B 2 ORG 1 3 ORG GRY GRN 2 1 COM ORG N O OVEN LAMP TEMPERATURE FUSE OVEN WHT GRN GRN CONTROL UNIT RY1 2ND IN...

Page 28: ...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 SPECIFIED 1SS270A Q10 DTA143EAK Q21 DTD14...

Page 29: ...Magnetron 1 BL 1 9 RLMPTA083WRZZ Oven lamp 1 AM 1 10 QSW MA137WRE0 1st latch switch 2nd interlock relay control switch 2 AH 1 11 QSW MA138WRE0 Monitor switch 1 AH 1 12 RTRN A656WRZZ Power transformer 1 BH 1 13 QFS TA038WRE0 Temperature fuse 120 C Oven 1 AK 1 14 RMOTDA173WRE0 Turntable motor 1 AX 1 14 RMOTDA226WRE0 Turntable motor Interchangeable 1 AT CABINET PARTS 2 1 GCABUA817WRPZ Outer case cabi...

Page 30: ... 5 4 LSTPPA205WRFZ Latch head 1 AF 5 5 MSPRTA187WRE0 Spring 1 AC 5 6 PSHEPA782WREZ Sealer film 1 AG 5 7 GCOVHA424WRFZ Choke cover 1 AK MISCELLANEOUS 6 1 NTNT A094WRE0 Turntable 1 AN 6 2 FROLPA099WRKZ Turntable support 1 AP 6 3 TCAUHA214WRR0 K caution label 1 AC 6 4 FW VZB889WREZ Main wire harness 1 AV 6 5 TINSEA921WRRZ Instruction book 1 AL 6 6 FW VZB888WREZ Switch harness 1 AU 6 7 TSPCND167WRRZ R...

Page 31: ... AND CABINET PARTS 7 8 2 1 7 8 7 8 7 8 7 8 1 9 6 3 4 11 4 3 7 3 7 5 2 2 4 7 4 10 6 6 4 2 6 1 6 2 7 3 7 2 7 3 7 9 7 9 1 7 1 12 7 1 4 5 7 3 4 13 7 6 7 3 7 2 7 3 4 12 7 1 1 4 1 6 1 10 1 11 1 10 1 14 1 3 4 1 7 2 2 2 4 6 1 8 1 13 4 9 1 5 4 8 4 4 7 1 7 1 1 1 1 2 7 7 7 4 4 9 7 1 ...

Page 32: ...mechanical photocopying recording or otherwise without prior written permission of the publisher 1 A B C D E F G H A B C D E F G H 2 3 4 5 6 1 2 3 4 5 6 5 2 6 4 5 5 5 3 5 4 5 6 5 7 5 1 Actual wire harness may be different than illustration 6 6 3 2 3 1 1 3 1 6 7 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 CONTRO...

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