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R-9H56

SHARP CORPORATION

SERVICE MANUAL

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-9H56

S8409R9H56PJ/

COVECTION

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 ....................................................................................................  7
SERVICING ........................................................................................................................................................  10
TEST PROCEDURE ..........................................................................................................................................  12
TOUCH CONTROL PANEL ................................................................................................................................ 21
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ...............................................................  27
MICROWAVE MEASUREMENT ........................................................................................................................  32
WIRING DIAGRAM ............................................................................................................................................. 33
PICTORIAL DIAGRAM .......................................................................................................................................  35
CONTROL PANEL CIRCUIT .............................................................................................................................. 36
PRINTED WIRING BOARD ................................................................................................................................ 37
PARTS LIST ........................................................................................................................................................  38

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Summary of Contents for R-9H56

Page 1: ...WAVE 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 7 SERVICING 10 TEST PROCEDURE 12 TOUCH CONTROL PANEL 21 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 27 MICROWAVE MEASUREMENT 32 WIRING DIAGRAM 33 PICTORIAL DIAGRAM 35 CONTROL PANEL CIRCUIT 36 PRINTED WIRIN...

Page 2: ...R 9H56 ...

Page 3: ... 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 engineers All the parts marked on parts list are used at voltages more than 250V Removal of the outer wrap gives access to potentials above 250V All the parts marked on parts list may cause undue microwave exposure by themselves o...

Page 4: ...mer 0 99 min 99 sec Microwave Power for Variable Cooking Repetition Rate HIGH Full power throughout the cooking time MED HIGH approx 70 of Full Power MED approx 50 of Full Power MED LOW DEFROST approx 30 of Full Power LOW approx 10 of Full Power Convection Temperature for Variable Cooking CONVECTION 40 to 250 C Temp control LOW MIX BAKE 180 C with 10 of microwave power HIGH MIX ROAST 200 C with 30...

Page 5: ...FROST AUTO Pcs kg MULTICOOKPAD PresstoselectMultiCookmode REHEATSENSORPAD Presstoselect3popularReheat menus SENSORINSTANTACTIONPADS Pressoncetocookorreheat6 popularmenus CONVECTIONCOOKING FUNCTIONPADS Presstocookforeachfunction MORE LESS PADS Presstoincrease decreasethetime inoneminuteincrementsduring cookingortoalterthedonenessfor theSensorInstantAction Reheat Sensor MultiCookorEasyDefrost mode I...

Page 6: ...power transformer oven lamp etc are turned off and the generation of microwave energy is stopped The oven will revert to the OFF condition 6 When the door is opened during a cook cycle the monitor switch upper latch switch lower latch switch and stop switch are activated with the following results The circuits to the turntable motor cooling fan motor and high voltage components are de energized th...

Page 7: ... is returned to the open position closing the damper switch contacts which send a signal to the control unit de energizing shut off relay RY4 AUTOMATIC MIX COOKING CONDITION Program desired cooking time and temperature by touching the number pads and the LOW MI or HIGH MIX pad When the START pad is touched the following operations occur 1 The numbers of the digital read out start the count down to...

Page 8: ...grammed convection temperature the oven goes into the programmed cooking mode 6 At the end of the MULTI COOK cycle the damper is returned to the open position and the oven will go to the offcondition Thecoolingfanwill remainonuntiltheoven has cooled EASY DEFROST COOKING TheEASYDEFROSTkeyisaspecialfunctionkeytodefrost meats and poultry faster and better EASY DEFROST key has 4 defrost stages EASY DE...

Page 9: ...e first opened and then the common and normal open contacts of upper latch switch close On opening the door each of these switches operate inversely 3 If the door is opened during cooking and the common and normal open contacts of upper latch switch and lower latch switch fail to open the fuse blows simultaneouslywithclosingofthemonitorswitchcontacts CAUTION BEFORE REPLACING A BLOWN FUSE TEST THE ...

Page 10: ...he oven cavity is maintained at approximately the selected temperature When the convection time reaches 0 the convection heater is de energized and the convection fan stops operating and the oven shuts off Upon completion of the cooking time the audible signal will sound and oven lamp turntable motor cooling fan motor and convection motor are de energized At the end of the convection cycle if the ...

Page 11: ...4 is turned off 1 5 The 240 volts A C to the damper motor is stopped and the motor turns off 2 When oven is microwave cooking Damper is in the open position 3 When oven is convection cooking 3 1 Dampermotorisenergizedbytouchingtheconvection temperature and START pads 3 2 When damper is in the closed position damper switch is OFF its signal is sensed by the control unit and shut off relay RY4 is de...

Page 12: ...ecks and reconnect the leads to the primary of the power transformer REMEMBER TO CHECK 4R 1 Reconnectallleadsremovedfromcomponentsduring 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 oven turntable close the door ...

Page 13: ...condition Oven lamp does not light with door opened Oven lamp does not light at all Oven lamp light but turntable motor does not operate Cooling fan motor does not oper ate The oven stops after1 minute Oven does not go into a cook cycle when START pad is touched Low or no power is produced during microwave cooking The food is heated incompletely or not heated at all Extremely uneven heating is pro...

Page 14: ...ows P x t 4 187 V x T P W 4 187 x V x T t Our condition for water load is as follows Room temperature around 20 C PowersupplyVoltage Ratedvoltage Water load 1000 g Initial temperature 10 2 C Heating time 49 sec P 85 x T COMPONENT TEST Measuring condition 1 Container The water container must be a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diamet...

Page 15: ...r with V ml rises T C during this microwave heating period the calorie of the water is V x T The formula is as follows P 8330 x T t Our condition for water load is as follows Room temperature 23 2 C Power supply Voltage 240 volts Water load 2000 ml Initial temperature 23 1 C Heating time 1 min 51sec P 75 x T Measuring method A The two water containers must be prepared The water container must be o...

Page 16: ...ct the leads to the primary winding of the power transformer Disconnect the filament and secondary winding connections from the rest of the HV circuitry Using an ohmmeter set on a low range it is possible to check the continuity of all three windings The following readings should be obtained a Primary winding approx 1 3 Ω b Secondary winding approx 72 Ω c Filament winding less than 1Ω If the readi...

Page 17: ...about 10 MΩ because of its internal 10MΩ resistance F When the internal wire is opened in the high voltage capacitor shows an infinite resistance G The resistance across all the terminals and the chassis must be infinite when the capacitor is normal If incorrect reading are obtained the high voltage capacitor must be replaced CARRY OUT 4R CHECKS E SWITCH TEST CARRY OUT 3D CHECKS Isolate the switch...

Page 18: ... to convection motor locked An open circuit thermal cut out 95 C FM indicates that the fan motor winding has overheated this may be due to blocked ventilation or locked cooling fan CARRY OUT 3D CHECKS Before carring out the following tests make sure the heater is fully cool 1 Resistance of heater Disconnect the wire leads to the heater to be tested Using ohmmeter with low resistance range Check th...

Page 19: ... a number pad two figures or more are displayed c When touching the pads sometimes a pad produces no signal 2 Control Unit The following symptoms indicate a defective control unit Replacethe control unit 2 1 In connection with pads a When touching the pads a certain group of pads do not produce a signal b When touching the pads no pads produce a signal 2 2 In connection with indicators a At a cert...

Page 20: ...asseroles N RELAY TEST emove the outer case and check voltage between Pin Nos 7 and 9 of the 9 pin connector A on the control unit with an A C voltmeter The meter should indicate 240 volts if not check oven circuit Shut off Cook and Heater 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 or convection co...

Page 21: ...eaning solvents near the oven while using Sensor settings The sensor will detect the vapor given of by the spray and turn off before food is properly cooked 8 After the oven is started on sensor cooking condition if the sensor has not detected the vapor of the food ERROR will appear and the oven will shut off Water load cooking test Make sure the oven has been plugged in at least five minutes befo...

Page 22: ... Disconnect the sensor connector that is mounted to lower portion of control panel 5 Then connect the dummy resistor circuit see fig to the sensor connector of control panel 6 Reconnect the oven to the power supply and check the sensor cook operation proceed as follows 6 1 Touch REHEAT SENSOR pad twice 6 2 The control panel is in the sensor cooking operation 6 3 After approximately 20 seconds push...

Page 23: ...luorescent Display has 6 digits 15 segments are used for displaying figures The touch control section consists of the following units as shown in the touch control panel circuit 1 Key Unit 2 Control Unit The principal functions of these units and the signals com municated among them are explained below Key Unit The key unit is composed of a matrix signals generated in the LSI are sent to the key u...

Page 24: ...g signal To turn on and off the cook relay RY2 In HIGH operation the signals holds L level during micro wave cooking and H level while notcooking Inothercookingmodes MED HIGH MED MED LOW LOW the signal turns to H level and L level in repetition according to the power level 14 P54 OUT Heating element driving signal To turn on and off shut off relay RY3 L level during convection cooking H level othe...

Page 25: ...nal clock oscillation frequency setting input The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to XOUT terminal 31 XOUT OUT Internal clock oscillation frequency control output Output to control oscillation input of XIN 32 VSS IN Power source voltage 5V VC voltage of power source circuit input 33 P27 IN Signal coming from touch key When any one of...

Page 26: ...e of G 7 line keys on key matrix is touched 43 P15 OUT Segment data signal Key strobe signal Signal applied to touch key section A pulse signal is input to P24 P27 terminal while one of G 8 line keys on key matrix is touched 44 P14 OUT Digit selection signal Signal similar to P22 45 P13 OUT Segment data signal Signal similar to P23 46 P12 OUT Segment data signal Signal similar to P23 Key strobe si...

Page 27: ...top sensor cooking thereafter the unit goes in the next operation automatically When the LSI starts to detect the initial voltage at AN6 terminal 16 seconds after the unit has been put in the Sensor Cooking mode if it is not possible to balance of the bridge circuit due to disconnection of the absolute humidity sensor ERROR will appear on the display and the cooking is stopped 1 Absolute humidity ...

Page 28: ...er supply cord between the touch control panel and the oven proper is long enough that they may be separated from each other 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 with a jumper which brings abo...

Page 29: ... from the basis of the 3D checks CAUTION DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPO NENTS OR WIRING REMOVAL 1 CARRY OUT 3D CHECKS 2 Disconnect the wire leads from power transformer 3 Disconnect the filament leads of the power transformer from the megnetron and high voltage capacitor 4 Disconnect the high voltage leads of capacitor from the transformer 5 Remove the two 2 screws...

Page 30: ...ven cavity 4 Release two 2 snap bands holding wire harness to the thermal protection plate left 5 The heater unit is now free HEATING ELEMENT AND THERMISTOR 1 Remove two 2 screws holding heating element to heater duct 2 Loosen two 2 screws holding holders to heater duct andtakeheatingelementoutofheatingelementholders 3 Heating element is free 4 Remove two 2 screws holding thermistor to heater duct...

Page 31: ... the shaft of the fan motor by pulling fan retainer clip and rotating the fan blade with your hand 3 Now the fan blade will be free CAUTION Do not use this removed fan blade again Because the hole for shaft of it may become bigger than a standard one 7 Remove the two 2 screws and nuts holding the fan motor and thermal cut out mounting angle from the fun duct 8 Now the fan motor is free 4 Take out ...

Page 32: ...e door remains less than 0 5 mm at latched position 2 The upper and lower latch switches interrupt the circuit before the door can be opened 3 The monitor switch contacts close when the door is opened 4 Re installtheoutercaseandcheckformicrowaveleakage around the door with an approved microwave survey meter Refer to Microwave Measurement Procedure LATCH HOOK STOP SWITCH MONITOR SWITCH UPPER LATCH ...

Page 33: ...ews Note After any service to the door A Make sure that the upper and lower latch switches are operating properly Refer to chapter Test Procedures B An approved microwave survey meter should be used to assure compliance with proper microwave radiation emission limitation standards DOOR ADJUSTMENT The door is adjusted by keeping the screws of each hinge loose The lower oven hinge can be loosened Af...

Page 34: ...crowave ovens must be used for testing 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 35: ...2 F 3 STOP SWITCH THER MISTOR DAMPER SWITCH AH SENSOR CM DAMPER MOTOR CONVECTION MOTOR TTM TURNTABLE MOTOR CONVECTION HEATER MAGNETRON H V RECTIFIER ASYMMETRIC RECTIFIER UPPER LATCH SWITCH THERMAL CUT OUT 95 C FM RY6 RY1 RY5 RY4 N O COM COM N O POWER TRANSFORMER CAPACITOR 1 13µ AC 2100V CONTROL UNIT TEMP FUSE 150 C THERMAL CUT OUT 150 C OVEN FUSE M8A 240 V 50Hz EARTH LIVE NEUTRAL MONITOR RESISTOR ...

Page 36: ...3 E 4 E 5 E 6 F 1 F 2 F 3 STOP SWITCH THER MISTOR DAMPER SWITCH AH SENSOR CM DAMPER MOTOR CONVECTION MOTOR TTM TURNTABLE MOTOR CONVECTION HEATER MAGNETRON H V RECTIFIER ASYMMETRIC RECTIFIER UPPER LATCH SWITCH THERMAL CUT OUT 95 C FM RY6 RY1 RY5 RY4 N O COM COM N O POWER TRANSFORMER CAPACITOR 1 13µ AC 2100V CONTROL UNIT TEMP FUSE 150 C THERMAL CUT OUT 150 C OVEN FUSE M8A 240 V 50Hz EARTH LIVE NEUTR...

Page 37: ...ED BRN CN E ORG ORG BRN 3 UPPER LATCH SWITCH MONITOR RESISTOR G R Y P P L CONTROL PANEL TEMP FUSE MG 150 C CONVECTION HEATER THERMISTOR HIGH VOLTAGE CAPACITOR POWER TRANSFORMER CONVECTION MOTOR GRN COM N O GRY WHT PRL WHT B L K RED RED WHT N O COM PNK PNK FUSE M8A BRN GRY 1 2 RED RED 2 1 BRN COM N O ORG PNK LOWER LATCH SWITCH MONITOR SWITCH COM N C PPL ORG BLK AH SENSOR RED WHT 1 2 3 CN F 2 RY3 RY...

Page 38: ... R100 3 3K x 4 R101 R102 R103 G 12 G 11 G 10 G 9 G 8 G 7 G 6 G 5 G 4 G 3 G 2 G 1 R91 D91 R92 D92 R93 D93 R94 D94 R95 D95 R96 D96 R97 D97 R98 3 3K x 8 D98 5 160 C 4 150 C 3 130 C 2 70 C 1 40 C 0 250 C 9 230 C 8 220 C 7 200 C 6 180 C Frozen Vegetables LESS EASY DEFROST MULTI COOK POWER LEVEL STOP CLEAR Reheat Pie AUTO START CLOCK LOW MIX CONVEC 1 IC1 IZA589DR 5 10 15 20 25 30 32 33 35 40 45 50 55 60...

Page 39: ...5 J3 7 IC 2 C4 15 CN F 8 9 10 11 14 6 R60 R61 R71 J9 E B E R49 R40 12 B Q87 13 R4 16 17 J10 RY3 RY4 RY5 18 D83 D82 D81 3 1 CN C D87 3 1 C60 R68 R64 R63 C70 19 20 21 R70 C80 R62 C61 22 D80 Q83 Q82 E E B B D70 D71 R1 CN E ZD1 E B Q1 R2 C8 B E Q80 R80 C2 24 26 Q20 E B C1 C21 23 25 B E E B C81 Q81 Q86 B B E E Q85 Q84 27 28 D85 D84 D3 D4 D1 D2 29 30 RY5 RY4 1 3 4 5 7 8 VRS1 J1 31 CN A RY6 D86 J8 R10 D7...

Page 40: ...AB 2 6 GFTARA001WRW0 Oven lamp access cover 1 AC 2 7 GLEGPA019WRE0 Foot 4 AD 2 8 LBNDKA036WRP0 Capacitor holder 1 AG 2 9 LBSHC0032WRE0 Cord bushing 1 AB 2 10 LSTPPA141WRF0 Cord anchorage Upper 1 AD 2 11 LSTPP0009YBF0 Cord anchorage Lower 1 AC 2 12 MLEVPA122WRF0 Latch lever 1 AD 2 13 PHOK A043WRF0 Latch hook 1 AM CONTROL PANEL PARTS 3 1 CPWBFA599WRK0 Control unit Not Replaceble Item 1 BN 3 1A QCNCM...

Page 41: ...1 113 VRD B12EF104J Resistor 100k ohm 1 4W 3 AA RY1 3 RRLY A083DRE0 Relay OMIF S 118LM 3 AK RY4 6 RRLY A078DRE0 Relay OJ SS 118LM 3 AG SP40 RALM A014DRE0 Buzzer PKM22EPT 1 AG T1 RTRNPA089DRE0 Transformer 1 AU VRS1 RH VZA032DRE0 Varistor 10G471K 1 AE ZD1 VHEHZ161 1 Zener diode HZ16 1 1 AA ZD3 VHEHZ4A2 1 Zener diode HZ4A2 1 AA ZD4 VHEHZ5C2 1 Zener diode HZ5C2 1 AA 3 2 FPNLCB100WRK0 Control panel fra...

Page 42: ...r sash left 1 AF 5 6 LSTPPA045WRF0 Upper latch head 1 AB 5 7 LSTPPA046WRF0 Lower latch head 1 AB 5 8 MSPRTA163WRE0 Latch spring 1 AD 5 9 NSFTTA044WRE0 Latch shaft 1 AC 5 10 PGLSPA422WRE0 Door glass 1 BA MISCELLANEOUS 6 1 FAMI A059WRM0 High rack 1 AP 6 2 FAMI A058WRM0 Low rack 1 AP 6 3 TCADCA546WRR0 Cook book 1 AZ 6 4 TINSEA631WRR0 Operation manual 1 AL 6 5 TLABNA191WRR0 Menu label 1 AD 6 6 FW VZB3...

Page 43: ... 28 LX WZA004WRE0 Washer 1 AA 7 29 XOTSD40P12000 Screw 4mm x 12mm 8 AA 7 30 XWSUW40 10000 Washer 4mm x 1mm 1 AA 7 31 LX WZA022WRE0 Washer 1 AA 7 32 LX CZA060WRE0 Special screw 1 AC Note The parts marked may cause undue microwave exposure The parts marked are used in voltage more than 250V REF NO PART NO DESCRIPTION Q TY CODE HOW TO ORDER REPLACEMENT PARTS To have your order filled prompty and corr...

Page 44: ... 4 6 2 8 1 1 7 19 7 4 1 4 1 10 4 26 1 9 4 36 4 38 4 22 4 32 7 9 7 19 4 4 1 9 1 14 7 15 4 15 7 24 7 16 1 21 4 20 4 39 7 10 2 7 7 1 2 5 7 23 4 41 7 28 1 23 4 25 4 2 4 30 4 30 4 28 4 11 7 31 4 28 4 29 2 11 4 7 4 37 7 22 x3 6 9 1 15 2 1 x4 1 11 7 23 7 22 x3 4 35 6 13 2 6 A x3 7 14 2 3 7 32 7 6 x4 4 31 6 5 2 12 2 13 1 8 7 8 2 4 7 29 7 13 x 3 7 27 7 27 7 27 x2 2 2 7 3 x3 4 16 7 3 x3 1 19 7 15 4 39 7 10 ...

Page 45: ... 5 1 2 3 A B C D E F G H A B C D E F G H CONTROL PANEL PARTS 5 1 5 10 7 17 5 5 5 3 7 25 5 2 7 2 5 7 5 8 5 9 5 6 7 18 7 19 x3 7 17 5 x6 5 4 x3 DOOR PARTS 3 2 3 1 3 8 3 5 3 9 3 6 3 7 7 10 6 8 3 3 3 4 7 10 7 10 3 2 1 x 3 x 4 3 2 2 ...

Page 46: ...ay be different than illustration 6 9 6 12 6 7 6 2 6 11 6 6 TURNTABLE TRAY INSTRUCTION BOOK AND COOK BOOK ROLLER STAY TRAY PACKING FOAM SPADPA198WRE0 DOOR PROTECTION SHEET SPADPA178WRE0 MICROWAVE OVEN PACKING PAD KIT CPADBA083WRK0 PLASTIC BAG SSAKHA012WRE0 TRAY HOLDER SPADFA348WRE0 Not replaceable items PACKING CASE SPAKCC385WRE0 ...

Page 47: ...R 9H56 45 ...

Page 48: ...R 9H56 46 94SHARP CORP 11K0 620E Printed in Australia ...

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