Sharp R-9X55 Service Manual Download Page 49

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Summary of Contents for R-9X55

Page 1: ...RTANT INFORMATION 1 WARNING 1 RODUCT SPECIFICATIONS 2 APPEARANCE VIEW 3 OPERATING SEQUENCE 4 FUNCTION OF IMPORTANT COMPONENTS 8 TRABLESHOOTING CHART I1 TEST PROCEDURE 14 TOUCH CONTROL PANEL 24 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 31 MICROWAVE MEASUREMENT 38 WIRING DIAGRAM 39 PICTORIAL DIAGRAM 41 CONTROL PANEL CIRCUIT 42 PRINTED WIRING BOAD 43 PARTS LIST 44 SHARP CORPORATION L ...

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Page 3: ...ed or connected All in put and output microwave connections waveguides flanges andgaskets must be secured Never operate the device without a microwave energy absorbing load attached Never look into an open waveguide 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 ...

Page 4: ...ave Power for Variable Cooking Repetition Rate HIGH Full power throughout the cooking time MED HIGH MEDIUM HIGH approx 70 of Full Power MED MEDIUM approx 50 of Full Power MED LOW MEDIUM 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 HIGH MIX ROAST 10 of microwave power 200 C wit...

Page 5: ...NSOR PAD Press to defrost meat popular or seafood automatically with weight sensor sensor POWER LEVEL PAD Press to select microwave power set ting If not pressed HIGH is automati cally selected NUMBER AND TEMPERATURE PADS Press to enter cooking times clock time convection temperature or to select the intelligent Sensor menus AUTO START CLOCK PAD Press to set clock or Auto Start time 1 1 POWER LEVE...

Page 6: ...wing condition Condition During Oven Door Switch Contact Cooking Open No cooking j Righ Latch Switch COM NO Closed Open Monrtor Switch COM NC Open Closed Left Latch Switch COM NO Closed Stop Switch Open OM NO Ciosed 3pen 6 The circuits to the power transformer and turntable motor are cut off when the right latch switch and left latch switch are made open The fan motor is cut off when the stop swit...

Page 7: ...ve 118 C the circuit to RY6 will be maintained by the thermistor circuit to con tinue operation of the cooling fan motor until the temperature drops below 118 C at which time the relay will be de energized turning off the fan motor Relay RY5 will however open as soon as the con vection cycle has ended turning off the convection fan motor This will now cool and allow the damper door to open At the ...

Page 8: ...rn it or season etc NOTE In case where a small quantity of food is cooked the oven will stop without displaying the remain ing cooking time 4 When the timer reaches zero an audible signal 5 sounds The shut off relay RYl RYG and cook re lay RY2 are de energized and the power trans former oven lamp etc are turned off Opening the door or touching the STOP CLEAR pad the time of day will reappear on th...

Page 9: ...e oven 3 set I When sensor cooking the sensing fire operation is I I not carried out until the oven senses the steam from THERMISTOR ON 3 food Because food cannot be cooked well by rotat OFF j I ing the convection fan at that time After sensing the steam the sensing fire operation is started When LSI judges it is fire in the oven cavity LSI will switch off the relays to the power transformer fan m...

Page 10: ...ice that pre vents current flow ins both directions And it prevents the temperature rise of the power transformer by blow ing the fuse M8A when the high voltage rectifier is shorted Dl I ASYMMETRIC RECTIFIER P HIGH VOLTAGE RECTIFIER The rated peak reverse voltage of Dl of the asymmetric rectifier is 6 KV The rated peak reverse voltage of D2 of the asymmetric rectifier is 1 7 KV DI and D2 of the as...

Page 11: ...ves the oven cavity througn the vent in the oven cavity left side wall Without leaving the oven this hot air is reheated by the con vection heater passes through the convection passage and enters the inside of the oven cavity again in a continuing cycle In this way the hot air circulates instde the oven cavity to raise its temperature and at the same time comes into con tact with the food being co...

Page 12: ...n NOTE If the damper door is not in the proper position closed durining convection or open durning microwave the control unit will stop oven operation after 1 minute Cooking Mode Microwave cooktq Convectton cooking AH Sensor cooklng MIX cooklng GUI COOkirlCj Operation of Damper OPEN CLOSE OPEN CLOSE Cl OSE u4h DER 3tJ T VC DAMPER DAfvlPEFi Sk AMPER SnfL ITcy DAMPER MST39 WEIGHT SENSOR ASSEMBLY 1 W...

Page 13: ...the leads to the primary of the power transformer 1 Reconnect all leads removed from components during testing 2 Replace the outer case abinet 3 Reconnect the supply 4 Run the oven Check a 1functions Microwave ovens shouid not be run empty To test icr the presence of microwave energy within a cavrty ace a cup of cold water on the oven turntable ciose rhe dcsr and set the microwave timer for two 2j...

Page 14: ... atier ni ii e y l iZi er aces nc go 1 L L Ir lC 2 COGk 1 1 fSTART oad is toucnea 2 k 1iaw 3 nc power IS proauced during __ _ _ mcVs i ___ __ I rv ave ccoking The fooo 1s heated r z cw I n A WROWAVE pierely or not neated at ali I I l Ex remeiy uneven nesting ISproouced in Gven __ ___ L i load food 1 I I i Fcjnctlon of variable cooKing does not operate i 1 prooeny except HIGH Dower ICON indtcator l...

Page 15: ...K CHECK i I I T O f P K L M MiM MiM MiCKiCK CKCK R CKi CK N CK CK i I I j I I I I 2 I T 1 j j j I I y 1 I f i 1 a IL 2 L 8 I jol I I 1 j 1 1 I I I P I I LA J i fAi I I I P L J L i I f I I i 1 I AL I 1 I 7 I I I l I I j I ...

Page 16: ...ing this microwave heating period the calorie of thewater is V x IT The formula is as follows Pxt 4 187 Vx T P W 4 187xVx T t 3ur condition for the water load is as follows Room iemperature around 2G C Water ioad 1000 g Power supply Voltage initial temperature IO i 2 C Rated voltage 7 go x i T Heating time 47 sec ial Measuring condition 4 Container The water coniainer must be a cylindrica borosili...

Page 17: ...by using a water load how much it can be absorbed by the water load To measure the microwave output power in the microwave oven the relation of calorie and watt is used When P W heating works for tjsecond approximately P x ti4 2 calorie is generated On the other hand if the temperature of the water with V ml rises AT C during this microwave heating period the calorie of the water is V x AT The for...

Page 18: ...UREMENT IF THE POWER IS INSUFFICIENT r 1 2s Ji TC r 7 7 iF 4 5 1 I II tib di z yqor Lft TZOCi ec B POWER TRANSFORMER TEST R N High voltages and large currents are present at the secondary winding and fila ment winding of the power transformer It is very dangerous to work near this i part when the oven is on NEVER make any voltage measurements at the high 1 voltage circuits in ding the magnetron fi...

Page 19: ...asymmetnc rest er s gret zzc fa i and must be replaced with the high voltage rectifier When the asymmetric rx f r 1sJeiec ive ci e whether magnetron high voltage rectifier high voltage wire or filament windirs ttx B JW cax former is shorted CARRY OUT 4R CHECKS NOTE For measurement of the resistance of the rectifier the batteries of the rrieastiring str m nt must have a volyage at least 6 volts bec...

Page 20: ...8A is biown there could be shc II harness A short in the asymmetric rectifier t7e asvmmetric rectifier or there is a ground In wire mai zave occured due to short or ground in H 1 recti I fier magnetron power transformer or L 1r e repair the wire harness 3eck them and replace the defective parts or CARRY OUT 4R CHECKS CAUTION Only replace fuse with the correct vatue repiacement G TEMPERATURE FUSE A...

Page 21: ...eplace the motor CARRY Ot T 4F SbEZ S L CONVECTION HEATER TEST CARRY OUT 30 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 the resistance across the terminals of the heater The resistance of heater is approximately 37 5 ohms 2 Insulation resis...

Page 22: ...ve components the Control Unit or Key Unit are replaced the defective par or pans must be properly packed for return In the shipping carton with its cushion material in which the new replacement part was shipped to you L KEY UNIT TEST If tne display fails to clear when the STOP CLEAR pad is depressed first verify the ribbon is makino good contact verify that thedoor sensing switchjstop switch oper...

Page 23: ...ANCE I I CAUSE 3R CORRECI C i 1 The rated voltage s not applied to POWER i Check supply vo tage ano oven poiver 3rd terminal of CPU connector 9 A I I 2 The rated voitage s applied to primary side of Power transformer or seccnaary zrrcu t oefec i Je C neck power transformer and repair 3 Only pattern at a IS broken Insert jumper wrre 1 and soider 4 Pattern at a and 5 are broken Insert the coil RCiLF...

Page 24: ...is produced oven should turn off when water is boiling ibubling ii the oven does no turn off reoface the AH sensor or check the control unit refer to TESTING METi lOD FOR AH SENSOR AND OR C 3NTROL UNIT TESTING METHOD FOR AH SENSOR AND OR CONTROL UNIT c determme if the sensor s c nt e b I tne simpiest method is tc replace it with a new replacement sEYr sor a i r I A I I6 Siscfir neci3 Jei iv rd i 3...

Page 25: ...und of buzzer 5 Press the GRILL pad Display shows O 6 Press the POWER LEVEL pad Display shows O 7 Press the INSTANT COOK START pad Display shows TEST with sound of buzzer 8 Press the 4 of number pads Display shows DISH with sound of buzzer and tuntable and oven lamps come on 9 After 13 seconds make sure that the display shows 25000 35000 with sound of buzzer If display shows less than 25000 or mor...

Page 26: ...rce synchronizing signal is available in order to compose a basic standard time in the clock circuit It incor oorates a very smal error because it works on commer iai frequency 5 ACL Circuit A circuit to generate signals resetting the LSI to the ini tial state when power is applied 6 Buzzer Circuit The buzzer is responds to signals from the LSI to emit noticeable sounds key touch sound and complet...

Page 27: ... converter buii lntc the AH sensor inout This in put is an analog input termkal from the 4H sensor gzircuit arc connected o the A C converter built into the LSi Used for initiai balancing of he bridge circuit absolute humiditiy sensor This input is an analog input terminal from the AH sensor circuit and connec ed to the AI D converter buili into the LSI I I 2 I 3 4 5 9 I I i I T IO 14 15 17 18 19 ...

Page 28: ...set temperature in the preheating B mode or when the preheating hold time 15 minutes is elapsed IN Sianal to svnchronize LSt with commercial Dower source freauencv This is the basic timing for all real time processing zf LSI OUT Damner motor relav drivina sianal To turn on and off shut off relay RY4 OFF b GND ON i IN II I I I i I t I I I I I I ly I I I I t 1 1 Connected to VC IN Auto clear termina...

Page 29: ... x s tcticnec 3 szr es ic d s sicna v l oe v inptit into RO 38 IN Anode seament of Wuoresent DisDiav liaht uo voltaGe 3 V Vp vpltage of power source circuit rnout f 39 P17 OUT 40 PI6 OUT 41 P15 OUT 42 P14 OUT 43 44 Pl3 P12 OUT Seament data sianais The reiation between signals and indicators are as foriows Sianal seamen Sianal seament Pl 7 i PQ6 PI 0 P16 P2 PO5 Pi 1 P15 P3 PO4 P12 1 P14 P4 PO3 Pl 3...

Page 30: ...Kev strobe sianals Signal applied to touch key section A pulse is input to RO R3 terminal while one of G l 1 line keys on key matrix is touched Seament data sianals Signal similar to PI 7 Kev strobe sianals Signa applied to touch key section A pulse is inDui to RO R3 terminal while one of G 12 line keys on key matrix is touched 46 PlO j OUT I i 51 52 I I f 53 I PO3 PO2 1 OUT PO1 OUT I I L _A _ P 3...

Page 31: ...uch a way as to change the resis tance values in parallel with R50 1 Changing the resis tance values results in that there is the same potential at both F 3 terminal of the absolute humidity sensor and IN0 terminal of the LSI The voltage of Nl terminal will indi cate about 2 5V This initial balancing is set up about 16 seconds after the unit is put in the Sensor Cooking mode As the sensor cooking ...

Page 32: ...ncluded 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 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 bot...

Page 33: ...bent or warped companying click indicating the actuation of the moni I tor switch and latch switches is heard 5 There are defective parts in the door interlock system 3 Visually check the door and cavity face plate for dam 6 There are defective parts in the microwave generating age dents cracks signs of arcing etc and transmission assembly 7 There is visible damage to the oven Carry out any remedi...

Page 34: ...oval L z 1 CIarefully remove four 411mounting screws holding the ri asnetron and magnetron air guide to waveguide When removing the screws hold the magnetron and magnetron ai Guide tc prevent it from falling care so the magnetron antenna should not hit by any 6 Remove the magnetron from the waveguide with metal object around the antenna CAUTION WHEN REPLACING THE MAGNETRON j BE SURE THE R F GASKET...

Page 35: ...ocket POSITIVE LOCK 3 CONNECTOR REMOVAL Pushing the lever of positive lock c corxecrc Pull out the positive lock8 connector PXltiVe iCCk 3 xnnec c CAUTION When you Service Engineers connect the positive lock3 connectors to the terminals con nect the positive lock so that ihe lever face you Service Engineers i ever Figure C 2 Positive lock connector TURNTABLE MOTOR REMOVAL 1 Disconnect the oven fro...

Page 36: ...oidlng ine thermistor assembly tr 1w heater duct assembiy 3 tjis onnec wire leads from thermlsior assembly l j o 4 y isti r cq lq V is free sIt VL S ie easp tws I_ 121snap bands from the hoies holding wire 3 zss tc the thermai protection p ate iefil 3FjSife eie iren 1 SCrewS 3 screws from outsrde ana 8 i F j i or ir jSf _b hoiding neater duct tc tne over a 2 _ VI r n er 1 di 11 assemoly is now fre...

Page 37: ...irmly 9 i 3 Therefore make sure to fix them as shown in Figure 1 PCWEE SLIPPLY CORD Figure 1 Correct Fixing CORDANCHORAGE UPPE9 Q c a A i 2x 7 J X 1 d s Figure 2 Wrong Fixing 3 Earth the green yellow wire lead of the power supply cord to the bottom plate with the single 1 screw 6 Wind the conductor of the blue wire lead of the power supply cord and the conductor of the wire lead of the main 4 Conn...

Page 38: ...1 Remove the five 5 screws 2 Open the door push the two hooks of lower frame by using flat type screw driver and pull the sash to front side 3 Remove other hooks of top right and left side and then Flat type screw drive DOOR REPLACEMENT AND ADJUSTMENT DOOR REPLACEMENT 1 CARRY OUT 3D CHECKS 2 Remove turntable tray and turntable support from oven cavity 3 Remove the outer frame assembly referring to...

Page 39: ...nel as shown figure to free engaging parts 3 Lift up choke cover 4 Now choke cover is free from door panei Liftda HANDLE 5 Remove the five 5 screws holding the handle to the door panel 6 Pull out the handle from the door frame 7 Now the handle is free DOOR FRAME III DOOR GLASS 8 Pull out the door glass from the door frame 9 Now the door glass is free Note When the new door glass is installed attac...

Page 40: ...microwave 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 5X in the center of the oven tray The water con tainer should be a low form of 600 ml beaker with in side diameter of approx 8 5cm and made of an elec trically non conductive material...

Page 41: ...1 DOOR CLOSED 2 CCOKING TIME PROGRAMMED 3 VARIABLE COOKING CONTROL I IIGW 4 START PAD TOUCHED Figure O l Oven Schematic OFF Condition 3a if3 I 2 E 0 2 g P SCHEMATIC NOTE CONDITION CfOVEN 1 D30R CLOSED 2 DEFROSTSENSOR PAD TOUCHED 3 START PAD TOUCHED Figure O 2 Oven Schematic High or AH Sensor Cooking Condition 39 ...

Page 42: ...UCHED g 9 z LL Cc g I 3 I uq arsul 1 I I I I l 1 I l E 5 8 lr F zr s I I 0 Es Sk 35 3 Figure O 3 Oven Schematic Convection and Grill Cooking Condition SWEMATIC NOTE CONDITION OFOVEN 1 DXR CLOSED 2 MIXCOOKING PADTOUCHED 3 DESlREDTEMP PADTOUCHED 4 START PADTOUCHED Figure O 4 Oven Schematic Mix Cooking Condition 40 ...

Page 43: ...E E P i5 3 L ii n 2 e G IA bd b 2 ITO o is 0 FZ B m I 96 B iI g 0 0 LLO 31 IHM C a Ill8 2 f NW 1 I III lr B g 00 8 5 5 a Q6 z 2 g 2 B C Li I 1 I 2 I 3 I 4 I 5 I 6 I 41 ...

Page 44: ... J i E A 11 6 2 L z is z s n E E s to L LL 1 1 t 1 i I g I ___ _ pi ii I III I L s b g _ gg 2 g _i 3 4 bBz f C 8 1 5 a _II III I l 2 AWK T n b I23 e I I a WENL t w3f H r ir 7r 7 la v D 8 2 1 if 1 1 I 1 k I I II jj 1 II LO f ____ _ _ N i L 8 kxN0001 23 f 6Wd1 0II K 3 89 7 1 I 2 I 3 I 4 I 5 I 6 42 ...

Page 45: ...R 9X55 1 I 2 I 3 I 4 I 5 I 6 A p L3 c l a II 3 B C D E F be Dj m G H 1 Figure S 3 Printed Wiring Boad I 2 I 3 I 4 I 5 I 6 43 ...

Page 46: ...VPA205WRF0 LSTPP0008YBEO LSTPP0009YBEO High voltage rectifier ass y Thermistor ass y Power supply cord Fuse M8A Temp fuse 15O C Fuse holder Oven lamp socket Monitor switch Damper switch V5230D 600 Left and right latch switches V 5230D 600 High volta gecapacitor Convection heater en lamp Damper motor Weight sensor assembly Turntable gear A Turntable motor Cooling fan motor until serial no 9302xxxxx...

Page 47: ...acitor 22uF 25V Capacitor O luF 5ov Capacitor 0 0luF 16v Capacitor 100pF 5ov Capacitor 1OuF 16V Capacitor O luF 5OV Capacitor O OluF 16V Capacitor O OluF 16V Capacitor O luF 50V Capacitor 4 7uF 35V Capacitor array 330pF x 4 Ceramic filter 4 OOMHz Diode MPGOGG Diode lSS270A Diode lSS2 OA Diode lSS27OA Diode lSS270A LSI Hybrid IC IC x24COl Transistor 2SBi93 Transistor DTA143ES Transistor 2SA933S Tra...

Page 48: ...WRPO PcUsuo329WRPo PCUSGA357WREO FWAKPAO44WRKO GWAKPA261WRFO LANGTA294WRPO XCPSD40P12000 MCAMPAO7lWRMO MCAMPAO72WRMO MSPRTA143WREO MSPRTAlSOWREO PSKR A171WRPO LANGTA289WRWO FANGQAlllWRYO PFPF A064WREO PGLSPA181WREO Oven cavity assembly Turntable support Turntable tray Bearing ass y Thermal protection plate left Bearing mounting plate Heater element holder Bearing holder plate Convection fan Pulley...

Page 49: ...k Clip 347 Caution label Menu label SCREWS NUTS AND WASHERS 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 7 1 LX EZA048WREO Special screw 2 7 2 XFPSD60P14JSO Screw 6mm x 141nm 2 7 3 LX CZ0017WREO Special screw 8 7 4 LX CZ0043WREO Special screw 6 7 5 LX CZ0052WREO Special screw 2 7 6 XBPSD50P14KSO Screw 5mm x l4rnm 6 7 7 XOTSD40P08000 Screw 4mm x 81nm 4 7 8 XJPSD40PlOOOO Screw 4mm x 1Omm 10 7 9...

Page 50: ...crew 3n mx 61t an 4 7 34 XPTSD40P06000 Screw 4mrnx 6rron 2 7 35 XBTWW4OPO6000 Screw 41mnx 6mm 4 7 36 xBTUW40P06000 Screw 4mm x 6m1n 13 7 37 LX WZA022WPEO Washer 1 7 38 XEPSD3OP08XSO Screw 3mm x 8mm 2 HOW TO ORDER REPLACEMENT PARTS To have your order filled promptly and correctly please furnish the following information 1 MODEL NUMBER 3 PART NO 2 REF NO 4 DESCRIPTION Q Q DOOR pR EcTa L Y TURNTABLE ...

Page 51: ...1 I 2 I 7 I 4 I 5 I 6 1 I 2 I 3 I 4 I 5 I 6 49 ...

Page 52: ...1 I 2 I 3 I 4 I 5 I 6 CONTROL PANEL PARTS Q 6 3 DOOR PARTS n 1 I I I I I I I I I I I I I I I I I I I I I I 1 I 1 I 2 I 3 I 4 I 5 I 6 93 SHARP CORP 03K0 75E Printed I Austraila 50 ...

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