Sharp R-9H10 Service Manual Download Page 16 | Manualshive

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Summary of Contents for R-9H10

Page 1: ...61OlU TABLE OF CONTENTS Page FOREWORD 1 CAUTION MICROWAVE RADIATION 1 PRODUCT DESCRIPTION 2 GENERAL INFORMATION OPERATING INSUTRACTIONS OPERATION SERVICING TOUCH CONTROL PANEL ASSEMBLY COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDl J MICROWAVE MEASUREMENT PROCEDURE 3 3 4 11 22 RE 31 37 PICTORIAL DIAGRAM 38 CONTROL PANEL CIRCUIT 39 PRINTED WIRING BOARD 40 PARTS LIST 41 PACKING AND ACCESSORIES 46 SHAR...

Page 2: ...R 9HlO ...

Page 3: ... used or connected All input and output microwave connections waveguides flanges and gaskets must be secured Never operate the device without a microwave energy absorbing load attached Never look into an open waveguide or antenna while the device is energized Note Parts List The parts marked I are used in voltage more than 250V RD36202U SHARPCORPORATION OSAKA JAPAN PRODUCT DESCRIPTION x j i _ I I ...

Page 4: ...owave Power for Variable Cooking Repetition Rate HIGH Full power throughout the cooking time MED HIGH I approx 70 of Full Power MED I 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 microwave power HIGH MIX ROAST 200 C with 30 microwave power SLOW C...

Page 5: ...mbol f or coloured green or green and yellow The wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black The wire which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red RD51108u OPERATING INSTRUCTIONS ONE TOUCH REHEAT PAD Touch to set clock or auto start VARIABLE COOKING CONTROL PADS Touc...

Page 6: ...by the magnetron is channeled through the waveguide into the cavity 6 7 feed box and then into the cavity where the food is placed to be cooked Upon completion of the cooking time the power transformer oven lamp etc are turned off and the generation of microwave energy is stopped The oven will revert to the OFF condition When the door is opened during a cook cycle monitor switch upper latch switch...

Page 7: ...than the selected temperature and the main supply voltage is applied to the con vection heater to return to the selected cooking temperature 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 cavity air temperature is above 90 C the circuit to RY6 will be m...

Page 8: ...ounds The shut off relay and cook relay are de energized and the power transformer oven lamp etc are turned off Opening the door or touching the STOP CLEAR pad the time of day will reappear on the display and the oven will revert to an OFF condition COMPU COOK COMPU COOK will automatically compute the oven temperature microwave power and cooking time for baking roasting and broiling Set the desire...

Page 9: ...ITCH L I A FAN MOTOR 7 _ _ A 3 A 3 UPPER LATCH SWITCH CONTROL UN IT SENSOR COOKING SCHEMATIC NOTE CONDITION OF OVEN 1 DOOR CLOSED 2 SENSOR COOK PAD TOUCHED 3 START PAD TOUCHED SCHEMATIC NOTE CONDITION OF OVEN 1 DOOR CLOSED 2 CLOCK APPEARS HIGH COOKING DAMPER MOTOR II SCHEMATIC NOTE CONDITION OF OVEN 1 DOOR CLOSED 2 COOKING TIME PROGRAMMED 3 VARIABLE COOKING CONTROL HIGH 4 START PAD TOUCHED 1 CONVE...

Page 10: ...WITCH o l3 2ow OVEN LAMP DAMPER MOTOR CONVECTION MOTOR TURNTABLE MOTOR FM lHERM0 CUT OUl 90 c LOWER LATCH SWITCH 3 FORMEA 1 OVEN THERM0 CUT OUT I50 c 4 h240V 5OHz UPPER LATCH SWITCH SCHEMATIC NOTE CONDITION OF OVEN 1 DOOR CLOSED 2 MIX COOKING PAD TOUCHED 3 DESIRED TEMP TOUCHED 4 START PAD TOUCHED MONITOR RESISTOR MONITOR SWITCH o a 2ow c E 4 I RY5 DAMPER SWITCH i E 5 CONTROL UN IT DAMPER MOTOR CON...

Page 11: ...rmally open contacts switch 2 As the door goes to a closed position the monitor switch contacts are 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 fail to open the monitor fuse blows simul taneously ...

Page 12: ...low t damper door to open RD72NOl U DAMPER OPEN CLOSE MECHANISM Usually the damper is in the open position except during convection cooking Damper position is set automatically by damper motor damper switch motor cam and damper shaft These components are operated by a signal that judges if microwave cooking or convection cooking operation is selected by the CPU unit Microwave Cooking Damper is in ...

Page 13: ...e that a specific test be performed These tests are given a procedure letter which will be found in the Test Procedure section IMPORTANT If the oven becomes inoperative be cause of a blown fuse in the monitor switch and upper latch switch circuit check the monitor switch and upper latch switch before replacing the fuse If the fuse is replaced the monitor switch should be replaced at same time RD81...

Page 14: ...d incompletely cooked or not cooked at all at end of cook cycle Oven goes into a cook cycle but extremely uneven heating is produced in open load food Oven does not cook properly when programed for MEDIUM etc cooking powers Operates properly on HIGH Oven does not cook properly when programed in EASY DEFROST cooking mode CONV indicator light but oven does not go into a cook cycle when START pad is ...

Page 15: ...i i 3 ii 8 J 5 ti i 2 z r Et 3 VI I 3 g 3 3 Y h 5 0 0 Y ki z Y 5 0 0 0 0 0 0 0 0 0 0 0 I III a l i m 0 0 1 i0 y y I 13 ...

Page 16: ...for the water load is as follows Water load 2000 ml Heating time I 12 seconds P 75 x AT Measuring method 1 Put the water load of two 2 litres on the center of the oven shelf The water load should be arranged in two 2 Pyrex beakers the size of which is one 1 litre and be placed at right and left side by side on the oven shelf 2 Measure the temperature of water before heating and also after heating ...

Page 17: ...bly defective and should be replaced ASYMMETRIC RECTIFIER TEST Isolate the rectifier from the circuit Using the highest ohm scale of the meter read the resistance across the terminals reverse the leads to the rectifier terminals and observe meter reading If an infinite resistance is read in both directions the rectifier is good If a short is indicated in either direction the one is probably defect...

Page 18: ...hen the door is opened check the upper latch switch and monitor switch according to the Test Procedure for those switches before replacing the blown fuse If the fuse is replaced the monitor switch should be replaced at the same time If the fuse is blown by improper switch operation adjust or replace the defective switch fuse at the same time Replace the fuse and monitor switch even if the switches...

Page 19: ...lation resistance meter The insulation resistance between convection heater terminal and cavity should be more than 1OOM n However when convection heater is hot more than 0 5M n THERMISTOR TEST Disconnect connector E from the control unit Measure the resistance of the thermistor with an ohmmeter Connect the ohmmeter leads to Pin No s E 3 and E 4 Room Temp Resistance 20 C 30 C Approx 300 fI 192 n I...

Page 20: ... or they continue to light up e Wrong figure appears f A certain group of indicators do not light up g The figure of all digits ficker 2 3 Other possible troubies caused by delx je control unit a Buzzer does not sound or continues to sound b Clock does not operate properly c Cooking is not possible d Proper temperature measurement is not obtained Note When defective components the Control Unit or ...

Page 21: ...CTION 1 The rated voltage is not applied to POWER terminal Check supply voltage and oven power cord of CPU connector CN A 2 The rated voltage is applied to primary side of power Power transformer or secondary circuit defective transformer Check and reuair 3 Only pattern at a is broken Insert jumper wire 1 and solder 4 Pattern at a and b are broken insert the coil RCILF2003YAZZ between c and I d NO...

Page 22: ...he oven will shut off Water load cooking test Make sure the oven has been plugged in at least five minutes before checking sensor cook op eration The cabinet should be installed and screws tightened 1 Fill approximately 200 milliliters 7 2 oz of tap water in a 1000 milliliter measuring cup 2 Place the container on the center of tray in the oven cavity 3 Close the door 4 Touch SENSOR COOK pad and n...

Page 23: ...y 4 Disconnect the sensor connector that is mounted to lowe 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 SENSOR COOK pad and number 2 pad 6 2 Touch Start pad The control panel is in the sensor cooking operation 6 3 After ap...

Page 24: ...compose a basic standard time in the clock circuit It incorporates a very small error because it works on commercial frequency 4 ACL Circuit A circuit to generate signals resetting the LSl to the initial state when power is applied 5 Buzzer Circuit The buzzer is responds to signals from the LSI to emit noticeable sounds key touch sound and completion sound 6 Temperature Measurement Circuit 1 Oven ...

Page 25: ...7 IN2 IN Temperature measurement input OVEN THERMISTOR By inputting DC voltage corresponding to the temperature detected by the thermistor this input is converted into temperature by the A D converter built into the LSI 8 IN1 IN AH sensor input This input is an analog input terminal from the AH sensor circuit and connected to the A D converter built into the LSI 9 IN0 Used for initial balancing of...

Page 26: ...L level during CONVECTION H level otherwise Terminal not used Heating element driving signal To turn on and off the heater relay RY3 L level during convection cooking H level otherwise During convection cooking the signal becomes H level when the temperature of the oven cavity exceeds the predetermined temperature Oven lamp and turntable motor driving signal Square waveform 50Hz To turn on and off...

Page 27: ... sound C When the temperature of the oven cavity reaches the preset temperature in the pre heating mode or when the preheating hold time 15 minutes is elapsed 0 12 BBC A 2 4 sec B 1 2 H CND C L 24 P31 IN Signal to synchronize LSI with commercial power source frequency This is the basic timing for all real time processing of LSI 25 P30 OUT Damper motor relay driving signal To turn on and off the sh...

Page 28: ...nput into R3 When no key is touched the signal is held at L level R2 IN Signal similar to R3 When any one of G 2 line keys on key matrix is touched a corresponding signal will be input into R2 36 Rl IN Signal similar to R3 When any one of G 3 line keys on key matrix is touched a corresponding signal will be input into Rl 37 RO IN Signal similar to R3 When any one of G 4 line keys on key matrix is ...

Page 29: ... signal is input to RO R3 terminal while one of G l 1 line keys on key matrix is touched Digit selection signal Signal similar to P15 1 Segment data signal Signal similar to P16 2 Key strobe signal Signal applied to touch key section A pulse signal is input to RO R3 terminal while one of G 10 line keys on key matrix is touched 1 Segment data signal Signal similar to P16 2 Key strobe signal Signal ...

Page 30: ...ent data signal Signal similar to P16 2 Key strobe signal Signal applied to touch key section A pulse signal is input to RO R3 terminal while one of G 6 line keys on key matrix is touched 1 Segment data signal Signal similar to P16 2 Key strobe signal Signal applied to touch key section A pulse signal is input to RO R3 terminal while one of G 5 line keys on key matrix is touched 1 Segment data sig...

Page 31: ...ircuit to allow the LSI to control the sensor cooking of the unit When the unit is set in the sensor cooking mode a 16 second clearing cycle occurs than the detector circuit starts to function and the LSI observes the initial voltage available at its IN1 terminal With this voltage given the switches SW1 to SW5 in the LSI are turned on in such a way as to change the re sistance values in parallel w...

Page 32: ...el assembly 5 1 Soldering iron 30W It is recommended to use a soldering iron with a grounding terminal 2 Oscilloscope Single beam frequency range DC IOMHz type or more ad vanced model 3 Others Hand tools Other Precautions 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 suppl...

Page 33: ...not closed CAUTION DISCONNECT OVEN FROM POWER SUPPLY BEFORE REMOVING OUTER CASE DISCHARGE HIGH VO LTAG E CAPACITOR BEFORE TOUCHING ANY OVEN COMPO NENTS OR WIRING RDA1203U OUTER CASE CABINET REMOVAL To remove the outer case and proceed as follows I Disconnect oven from power supply 2 Remove eight 8 screws from the rear and along the side edge of the case 3 Remove the two 2 screws LHSTIX LR 4 from t...

Page 34: ...RECTIFIER AND H V RECTIFIER ASS Y REMOVAL 1 Disconnect oven from power suppply and remove CAUTION WHEN REPLACING THE RECTIFIER outer case ASSEMBLY THE GROUND SIDE 2 Discharge the high voltage capacitor TERMINAL MUST BE SECURED 3 Remove one 1 screw holding the H V rectifier FIRMLY WITH A GROUNDING terminal to the capacitor holder SCREW 4 Disconnect the rectifier assembly from the capacitor HIGH VOL...

Page 35: ... and remove outer case Discharge the high voltage capacitor Disconnect wire leads from the convection motor Remove the convection fan belt and pulley M Remove two 2 screws holding the convection motor mounting angle to the heater duct and base cabinet 5 6 7 Take out the convection motor assembly from the unit The convection motor assembly is now free Remove two 2 screws and nuts holding the motor ...

Page 36: ...properly Refer to chapter Test Procedure and Adjustment procedure STOP SWITCH UPPER LATCH SWITCH LOWER LATCH SWITCH AND MONITOR SWITCH ADJUSTMENT moving it back and forth and then adjust the latch hook by moving it back and forth In and out play of the door allowed by the latch hook should be less than 0 5 mm 3 Secure the screws with washers firmly 4 Now make sure of the upper and lower latch swit...

Page 37: ...move the four 4 screws holding the panel frame to the back plate Separate the panel frame and back plate Remove the five 5 screws holding the control unit to the panel frame Lift up the control unit and disconnect the key connector from the control unit Now the control unit and frame assembly are sep arated DOOR DISASSEMBLY Remove door assembly refer to Door Replacement Replacement of door compone...

Page 38: ...ion limitation standards DOOR ADJUSTMENT The door is adjusted by keeping the screws of each hinge loose The lower oven hinge can be loosened After adjustment make sure of the following 1 Door latch heads smoothly catch the latch hook through the latch holes and the latch head goes through the center of the latch hole 2 Deviation of the door alignment from horizontal line of cavity face plate is to...

Page 39: ...rmance standard for microwave ovens must be used for testing 2 3 4 5 6 Recommended instruments are NARDA 8100 NARDA 8200 HOLADAY HI 1500 A SIMPSON 380M Place the oven tray into the oven cavity Place the load of 275 sfrl5ml of water initially at 20 5 C in the center 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 electri...

Page 40: ...so IL d a tw agys C UzL 8 2Stj E z I i s I I r i m 2 22 3x t 0 z I m 3 o o Ii i D 0 n I 1 z a L 5 4 a a 5 3 B z L i 5 i mm B om 5 LL 0 UC7 i K a 2 E gJi a25 s 9 3Jln 0 a a B 9 5 8 B ET s u 1 p 2 get I FIX 24x a 2 1 I iz 5 03 zu 0 1 4 x I 55 8 0 11 t YOt c 2 6 5 s Q Q s LL G N1 r r I I F I A I I g 5 p f s I 3 3 H 1 2 3 I 4 5 6 38 ...

Page 41: ... ci Y 3 ed it 0 __ xY f y7 r 8 Y 9 D L L re z G G ze x y g E o i s k T pl f L t VI VI v A 3 OYL g 5 i p y z g xzz kg y Eo L t k z iA N w L z i t I Y u 24 mmm m w z I 0 5 E n 5 t E 0 co it ii IA 2 r E L ii r 5 8 I E as 9fi a 96 1 I 2 3 4 5 6 II i I 1 39 ...

Page 42: ...d 1 z if 0 2 D ...

Page 43: ...rmer l 22 RV MZA074WREO Magnetron 1 23 FDTCTA077WRKO AH sensor CABINET PARTS 2 6 GFTARAOOlWRWO 2 7 GLEGPA013WREO 2 8 LANGK0243WRPO 2 9 LBSHC0032WREO 2 10 LSTPP0008YBFO FDAI A095WRYO Base plate assy FHNG A092WRMO Oven hinge lower GCABDA037WRWO Rear cabinet GCABUA227WRPO Outer case cabinet GCOVHA156WRPO Turntable motor cover Oven lamp access cover Foot Capacitor holder Cord bushing Cord anchorage up...

Page 44: ...2EK182F Resistor 1 8k n F 1 4W 1 AA R53 VRN B12EK364F Resistor 360k n F 1 4W 1 AA R54 VRD B12EF103J Resistor 10k n 1 4W 1 AA R55 VRD B12EF473J Resistor 47k n i 4W 1 AA R61 202 VRD B12EF273J Resistor 27k R 1 4W 2 AA R62 VRN B12EK753F Resistor 75k R F 1 4W 1 AA R63 VRN B12EKlOlF Resistor 100 n F 1 4W 1 AA R64 VRN B12EK222F Resistor 2 2k n F 1 4W 1 AA R81 86 VRD B12EF680J Resistor 68 n 1 4w 2 AA R200...

Page 45: ...te left 1 AM 4 36 PFPF A050WREO Thermal protection sheet right 1 AK 4 37 PGLSPA181WREO Oven lamp screen 1 AG 4 38 PREFHA027WRPO Thermal protection plate right 1 AL 4 39 PSKR A151WRWO Air guide A 1 AD 4 40 PSKR A152WRPO Air guide B 1 AB 4 41 PSKR A153WRPO Air guide bottom 1 AF 4 42 PSKR A156WRPO Air guide C 1 AB 4 43 PSKR AlGlWRWO Air guide right 1 AF 4 44 PSKR A171WRPO Magnetron air guide 1 AD 4 4...

Page 46: ... XCPSD30P06000 Screw damper motor oven therm0 cut out 5 AA and fan therm0 cut out mtg 7 16 XCPSD30P08XSO Screw oven lamp socket mtg AA 7 17 XCPSD30P08XOO Screw door flame and door sash left mtg AA 7 18 XCPSD30P08000 Screw door flame mtg 3 AA 7 19 XCPSD40P08000 Screw door sashlright 7 AA thermal protection platecright air guide right and damper ass y mtg 7 20 XCTSD40P08000 Screw steam duct mtg 3 AA...

Page 47: ...r A 6 C D E F G H i 1 2 3 4 5 6 1 2 3 I 4 5 6 45 ...

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