Sharp Carousel II R-3A54 Service Manual Download Page 14 | Manualshive

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Summary of Contents for Carousel II R-3A54

Page 1: ...ENTS Page GENERAL IMPORTANT INFORMATION 1 CAUTION MICROWAVE RADIATION WARNING 1 PRODUCT SPECIFICATIONS 2 APPEARANCE VIEW 3 OPERATION SEQUENCE 4 FUNCTION OF IMPORTANT COMPONENTS 5 SERVICING 7 TEST PROCEDURE 9 TOUCH CONTROL ASSEMBLY 17 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 22 MICROWAVE MEASUREMENT WIRING DIAGRAM 28 29 PICTORIAL DIAGRAM 30 CONTROL PANEL CIRCUIT 31 PRlN I ED WIRING DIAGRAM 32...

Page 2: ...R 3A54 R 3E54 Photo R 3E54W ...

Page 3: ...ate the device without a microwave energy absorbing load attached Never look into an open waveguide or antenna while the device is ener gized RD36203U 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 visib...

Page 4: ...wer for Variable Cooking Repetition Rate HIGH Full power throughout the cooking time MEDIUM HIGH approx 70 of Full Power MEDIUM approx 50 of Full Power MEDIUM LOW approx 30 of Full Power LOW approx 10 of Full Power AUTO COOK R 3A54 only EASY DEFROST Set Weight INSTANT COOK START LESS MORE R 3A54 only AUTO START CLOCK POWER LEVEL INSTANT ACTION 8 menu NUMBER STOP CLEAR Approx 16 0 kg PnA n 1 I L l ...

Page 5: ... press twice to cancel cooking k EASY DEFROST PAD programme Press to defrost meat by entering weight AUTO START CLOCK PAD Press to set clock or Auto Start time d NUMBER PADS Press to enter cooking times clock time weight or quantity of food or to select the Auto Cook menus e POWER LEVEL PADS Press to select microwave power setting If not pressed HIGH is automatically se lected g h 2 SERVE QUANTITY...

Page 6: ... during a cook cycle the switches come to the following condition CONDITION DURING DOOR OPEN SWITCH CONTACT COOKING NO COOKING 1st latch switch COM NO Closed Open Monitor switch COM NC Open Closed 2nd latch switch COM NO Closed Open Stop switch COM NO Closed Open The circuits to the power transformer fan motor and turntable motor are cut off when the 1st latch switch 2nd latch switch and stop swit...

Page 7: ...is 6 KV The rated peak reverse voltage of D2 of the asymmetric rectifier is 1 7 KV Dl and D2 of the asymmetric rectifier or high voltage rectifier are shorted when the each peak reverse voltage goes beyond the each rated peak reverse voltage The process of blowing the fuse M8A 1 The high voltage rectifier is shorted by any causes when microwave cooking 2 The peak reverse voltage of D2 of the recti...

Page 8: ...within the oven cavity the oven thermal cut out will open at 145OC causing the oven to shut down The defective thermal cut out must be replaced with new one TURNTABLE MOTOR The turntable motor drives coupling to rotate the turntable FAN MOTOR The fan motor drives a blade which draws external cool air This cool air is directed through the air vanes sur rounding the magnetron and cools the magnetron...

Page 9: ...ry of the power transformer REMEMBER TO CHECK lJ 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 oven turntable close the door and set the microwave timer for two...

Page 10: ...n lamp does not light Display appears an motor does not operate Display appears Turntable motor assembly does not operate Display appears Oven or any electrical parts does not stop But cooking time is 0 or STOP CLEAR key touched Oven seems to be operating but little or no heat is produced in oven load Microwave power level is set at HIGH Oven does not seems to be operating properly when MEDIUM HIG...

Page 11: ... rises AT C during this microwave heating period the calorie of the water is V x AT The formula is as follows p 8330 x AT t Our condition for the water load is as follows Room temperature 23 2 C Power supply Voltage Rated voltage Water load 2000 ml Initial temperature 23 1 C Heating time 2min 8 sec j P 65xAT Measuring method A Use two 1 litre Pyrex beakers with a diameter of approximately of 12cms...

Page 12: ...mum material thickness of 3 mm and an outside diameter of approximately 190 mm 2 Temperature of the oven and vessel The oven and the empty vessel are at ambient temperature prior to the start of the test 3 Temperature of the water The initial temperature of the water is 10 2 C 4 Select the initial and final water temperature so that the maximum difference between the final water temperature and th...

Page 13: ...n or HV circuit An open circuit thermal cut out Oven indicates that the foods in the oven may catch fire this may be due to over heating produced by improper setting of the cooking timer or failure of the control panel G MONITOR RESISTOR TEST CARRY OUT 3D CHECKS Disconnect the leads from the monitor resistor or surge resistor Using an ohmmeter and set on a low range Check between the terminals of ...

Page 14: ...lectrical parts or wire harness Check them and replace the defective parts or repair the wire harness 2 If the fuse M8A is blown when the door is opened check the 1st latch switch 2nd latch switch monitor switch and monitor resistor If the fuse M8A is blown by incorrect door switching replace the defective switch s and the fuse M8A 3 If the fuse M8A is blown there could be a short in the asymmetri...

Page 15: ...ained RELAY TEST 1 2 3 4 5 6 CARRY OUT 3D CHECKS Disconnect the leads from the primary of the power transfomer Make sure that the leads re main isolated from other oven components and chassis Use insulation tape if necessary Close the door Reconnect the supply Check the voltage between Pin Numbers 3 and 5 of 4 pin connector A on the control unit with an A C voltmeter The meter should indicated 240...

Page 16: ...R ter Check supply voltage and oven power cord Please j minal of CPU connector CN A use term Low voltage transformer when refering to transformer Tl 2 i 1The rated AC voltage is present at primary side of low Low voltage transformer or secondary circuit defec i voltage transformer tive Check and repair 3 Only pattern at a is broken Insert jumper wire Jl and solder 4 Pattern at a and b are broken I...

Page 17: ...l Voltage Application VC 5v LSI ICI VP 29v Fluorescent display tube Grid and anode voltage VFI 3Vac Filament of fluorescent display tube VF2 VFI to VF2 voltaae Synchronizing Signal Circuit The power source synchronizing signal is available in order to compose a basic standard time in the clock circuit It accompanies a verv small error because it works 4 ACL Circuit A circuit to generate a signal w...

Page 18: ...al is input to R23 R30 R32 terminal while one of Gl line keys on key matrix is touched PIN NO 6 Segment data signal Signal similar to Dl 1 1 SIGNAL ROI I I O OUT Kev strobe signal Signal applied to touch key section A pulse signal is input to R23 R30 R32 terminal while one of G2 line keys on key matrix is touched PIN NO 1 7 Segment data signal Signal similar to Dl 1 1 SIGNAL 1 RO2 I I O 1 OUT Kev ...

Page 19: ...17 Siqnal cominq from touch kev When either one of GIO line keys on key matrix is touched a corresponding signal will be input into R30 PIN NO 1 18 1 SIGNAL 1 R31 1 I O 1 IN Siqnal cominq from touch kev When either one of Gll line keys on key matrix is touched a corresponding signal will be input into R31 1 SIGNAL 1 R32 I I O 1IN PIN NO 1 19 Siqnal cominq from touch kev When either one of G12 line...

Page 20: ...ltage input terminal Connected to GND PIN NO I 33 1 SIGNAL 1 DO 1 I O 1 OUT Terminal not used PIN NO 34 1 SIGNAL Dl I I O 1 OUT Magnetron High voltane circuit drivino signal To turn on and off the cook relay in high operation the signals holds H level during microwave cooking and L level while not cooking In other cooking modes MED HIGH MED MED LOW LOW the signal turns to H level and L level in re...

Page 21: ...e keeping it in contact with the oven proper B On some models on the other hand the power supply cord between the touch control panel and the oven proper is so long that they may be separated from each other For those mod els therefore it is allowed 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 s...

Page 22: ...e oven with the outer case re 3 Remove the screws from rear and along the side moved edge of case N B Step I 2 and 6 form the basis of the 3D checks 4 Slide the entire case back about 1 inch 3cm to CAUTION DISCHARGE HIGH VOLTAGE free it from retaining clips on the cavity face plate CAPACITOR BEFORE TOUCHING ANY 5 Lift the entire case from the oven OVEN COMPONENTS OR WIRING HIGH VOLTAGE COMPONENTS ...

Page 23: ... Push down the control panel 3 Hold the control panel to the oven cavity with the single 1 screw 4 Connect the leads to the control panel OVEN LAMP SOCKET REMOVAL Own lamp scxkot 1 CARRY OUT 3D CHECKS 2 Bend the tab of the lamp angle 3 Lift up the oven lamp socket 4 Pull the wire leads from the oven lamp socket by pushing the terminal hole of the oven lamp socket with the flat type small screw dri...

Page 24: ...ecome bigger than a standard one Axis These are the position where should be pinched with pliers Figure C 3 b Side view INSTALLATION 1 Install the fan motor to the fan duct assembly with the two 2 screws 2 Install the fan blade assembly to the fan motor shaft according the following procedure 1 2 3 Hold the center of the bracket which supports the shaft of the fan motor on the flat table as shown ...

Page 25: ...and check for microwave leakage around door with an approved microwave survey meter Refer to Microwave Measurement Procedure Note The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle This function does not require that door be air tight moisture condensation tight or light tight Therefore occasional appe...

Page 26: ...or 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 l 5ml of water initially at 20f 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 mater...

Page 27: ... OVEN I 1 DOOR CLOSED 2 COOKING TIME PROGRAMMED 3 START KEY TOUCHED 5 sz vc 2 v 5 ag 5 0 F GF 3 I 9 ccc p s I SW I 3 e w _ I 3 I I I 1 I I J I I A q c P 4 I BP s I f I l t 1 0 d it m4 2 4 c J 8 I3 B 8 Ki 3 i b a 6 p v L i f 8 aim L J 6 a i t 522 4 y m i i 2 L 0 Y 4 90 u 0a cd L l 8 1 ffi i Figure O 2 Oven Schematic ON Condition 29 ...

Page 28: ...R 3A54 R 3E54 C D E z i I 1 F _ G H f 41 n z i 4 m 7 H z n i I 1 2 3 4 5 I a 30 ...

Page 29: ...R 3A54 R 3E54 l l Y T 8Z 88 bb c 2 y 2 s Zf 5E ii 1 d iiii H9 I u u SSUA I s C s F o 1 P 9 1 I 2 I I 3 4 5 6 31 ...

Page 30: ...R 3A54 R 3E54 1 A B C D E F G H 1 2 3 4 5 6 Figure S 3 Printed Wiring Board I 1 2 3 4 5 6 32 ...

Page 31: ...or B QCNCWA030DREO 12 pin connector G 3 1D RV KXA037DREO Fluorescent display tube Cl RC KZA087DREO Capacitor O lpF 50V c2 VCEAB31VW477M Capacitor 470j F 35V c3 VCEAB31HW335M Capacitor 3 3pF 50V c4 VCEAB31CW476M Capacitor 47pF 16V c5 VCEAB31CWlOGM Capacitor 1OpF 16V C6 7 11 VCKYDllCY103N Capacitor O OlpF 16V c40 c10 12 VCTYF31HF103Z Capacitor O OlpF 50V Cl3 VCEAB31VWlOGM Capacitor 10pF 35V c30 VCEA...

Page 32: ...t assembly GDAI A208WRWO Bottom plate Left GLEGPA035WREO Foot 4 11 4 12 4 13 4 14 4 15 4 17 4 18 4 19 4 20 4 21 LSUB A066WRPO Magnetron angle MHNG A290WRTO Lower oven hinge MHNG A270WRTO Upper oven hinge MLEVPA194WRFO Switch lever NCPL A039WRFO Coupling PCOVPA245WRTO Motor cover PCOVPA271WREO Waveguide cover PCUSUA166WRPO Cushion PCUSUA329WRPO Cushion PPACGA073WREO Rubber cushion B 4 22 4 22 l 4 2...

Page 33: ...WREO Tube 1 AG SCREWS AND WASHERS 7 1 XHTSD40P08RVO Screw 4mm x 8mm AA 7 2 LX CZA038WREO Special screw AA I LX CZ0052WREO Special screw 2 AA XFPSD30PlOOOO Screw 3mm x 1Omm AA 7 5 XFPSD40P08KOO Screw 4mm x 8mm 3 AA I XFPSD40P08000 Screw 4mm x 8mm 5 AA XHPSD30PlOXSO Screw 3mm x 1Omm 1 AA 7 8 XHTSD40R12RVO Screw LHSTIX LR 4 3 AA 110 XOTSD40P12RVO Screw 4mm x 12mm 8 AA XOTSD40P12000 Screw 41nm x 12mm ...

Page 34: ...R 3A54 R 3E54 1 2 3 4 5 6 I C 6 4 13 4 7 4 P 4 15 c d 7 a 23 4 3 A L E 7 13 x2 4 18 ff ff 4 9 4 10 x2 b 1 2 3 4 5 6 36 ...

Page 35: ...R 3A54 R 3E54 ...

Page 36: ...n illustration PACKING AND ACCESSORIES l PACKING PAD KIT MICROWAVE OVEN EKING CASE SPAKCB694WREO R 3E54 SPAKCB896WREO R 3A54 a TuRNlAsu TRAY a i m o EMTloN MANUAL ROLLER STAY INTOTHE lNot Replaceable Items I 1 2 3 4 5 6 A B C D E F G IH 4 92 SHARP CORP 4K0 93E Printed in Australia 38 ...

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