Sharp R-4H54, Service Manual

Page 1: ...lemental manual together with the Base Model Service Manual Refer to the Base Model Service Manual for complete operation service information etc RD17 Ol UI TABLE OF CONTENTS GENERAL IMPORTANT INFORMATION Page CAUTION MICROWAVE RADlATlON WARNING 1 PRODUCT SPECIFICATIONS 1 APPEARANCE VIEW OPERATION SEQUENCE SERVICING 4 TEST PROCEDURE 5 TOUCH CONTROL ASSEMBLY 6 COMPONENT REPLACEMENT AND ADJUSTMENT P...

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Page 3: ... on parts list are used at voltages more than 250V I RDSlllOu SHARP CORPORATION OSAKA JAPAN 71jx 71jx y I y I x A L Y x A L Y y y a C C i jas x I i s i j s E I 8 7 w y 1 y 1 k 1 k 1 y l L L L i r X y L L i r w w a A gs idp y a a A gs idp y a L 3 7 4 j L 3 7 4 j s s 4 _ 4 _ i 4 2 i 4 2 I I _ _ zy Q a zy Q a _ ic _ ic 2 g 2 r w g 2 r w I P I P G I G I j W d x p r p p fy j 4 r i W d L i G L i G 1 1 z...

Page 4: ...m Height 211 mm Depth 411 mm Turntable diameter 360mm Control Complement Touch Control System Clock I 00 12 59 Timer 0 99 minutes 99 seconds Microwave Power 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 I approx 30 of Full Power I LOW SENSOR INSTANT ACTION approx 10 of Full Power SENSOR...

Page 5: ...cooking times Fresh Vegetables Frozen Vegetables clock time or to select the Sensor Cook menus POWER LEVEL PAD Press to select microwave teasoned Roast 11 Desserts y l power setting If not pressed HIGH is auto t F 1 matically selected 12345 6 7 890 STOP CLEAR PAD Press to erase during pro gramming Press once to stop operation of oven during cooking press twice to cancel cooking pro gramme c_ POWER...

Page 6: ...lect Touch SENSOR COOK pad The oven should not be operated on SEN SOR COOK immediately after plugging in the unit Wait five minutes before cooking on SENSOR COOK desired Sensor setting START pad The coil of shut off relays RYI is energized the oven lamp and cooling fan motor are turned on but the power transformer is not turned on After about 16 seconds the cook relay RY2 is en ergized The power t...

Page 7: ...y oEhe 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 oven turntable close the door and set the microwave timer for two 2 ...

Page 8: ... lamp does not start when START pad is touched Display appears i il kc J y 4 f Y L 3 In 4 L J I 3 z 3 1 L Fan motor does not operate Display appears L c Turntable motor assembly does not operate Display appears I L c ON Oven or any electrical parts does not stop CONDITION But cooking time is 0 or STOP CLEAR key touched c IC Oven seems to be operatmg but little or no heat _ is produced in oven load...

Page 9: ...5 ft z m 4 ii i R E Y D r L r L RE i ii P tJ D 5 F A u d c n u z iii B Y ER E 5 z c z u 2 E 5 ik D Y E i i E C c c c z __ c 3 c c CK OH ii 6 E 8 ii h r L r L Fit W G 0 Ep i I ifi c C P u __ 3 n U A u __ 5 i ii Ei 6 i F i n u E g 3 F i k d N __ c _ 7 ...

Page 10: ...t minimum and an accurate mercury thermometer is recommended D Place the two beakers as touching each other in the centre of the cavity E Set the timer to 1minute and 51 seconds at 100 power the time required to raise the water temperature IO degrees C F The time must be measured with stopwatch or wristwatch G After 1minute and 51 seconds stop the oven by opening the door H Remove the two beakers ...

Page 11: ...vices and measuring instruments in order to minimize addition or removal of heat 6 The graduation of the thermometer must be scaled by 0 1 C at minimum and an accurate thermometer 7 The water load must be 1000 5 g 8 t is measured while the microwave generator is operating at full power Magnetron filament heat up time is not included NOTE The operation time of the microwave oven is t 2 sec 2 sec is...

Page 12: ...igit all or some segments do not light up b At a certain digit brightness is low c Only one indicator does not light d The corresponding segments of all digits do not light up 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 flicker 2 3 Other possible problems caused by defective control unit a Buzzer does not sound or c...

Page 13: ...Y AND IC3 MEMORY TEST After replacing the weight sensor turntable control unit turntable motor or IC3 carry out the following procedure in order to calibrate the weight sensor If the weinht sensor is not recalibrate the food may be over or under cooked The following procedure should be carried out with microwave oven in a fully assembled condi tion with outer case fitted 1 Test Method 1 Place the ...

Page 14: ... For example chicken pieces would be at refrigerator temperature and canned soup at room temperature 7 Avoid using aerosol sprays or cleaning 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 about 41 minutes if the sensor has not detected the vapor of the food ERROR will appear and the oven...

Page 15: ...ect the wire leads from the cook relay 4 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 l Touch SENSOR COOK pad and number 1 pad 6 2 The control panel is in the sensor cooking ...

Page 16: ... 26V Fluorescent display tube Grid and anode voltage VFl 3Vac Filament of fluorescent display tube VF2 VFI to VF2 voltage 3 4 5 6 7 8 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 very small error because it works on commercial frequency RD918AZU ACL Circuit A circuit to generate a sig...

Page 17: ...I O IN Input signal which communicates the door open close information to LSI Door closed H level signal OV Door opened L level signal 5V RD937A2Uj PIN NO 1 9 1 SIGNAL j A5 I l O j IN WEIGHT sensor input This input is an analog input terminal from the WEIGHT sensor circuit and connected to the A D converter built into the LSI PINNO 10 1 SIGNAL j A6 I l O 1 IN AH sensor input This input is an analo...

Page 18: ... Used for initial balancing of the bridge circuit absolute humidity sensor PIN NO 22 23 1 SIGNAL C5 C6 Used for initial balancing of the bridge circuit WEIGHT SENSOR I I O 1 OUT PIN NO 24 1 SIGNAL C7 I I O j OUT Oven lamp driving signal Square waveform 50Hz To turn on and off shut off relay RYI The square waveform voltage is delivered to the relay RYI driving circuit and relay RY2 control circuit ...

Page 19: ... light up voltaqe 26V Vp voltage of power source circuit input RD93GA8IJ PIN NO 1 34 1 SIGNAL i FO Diait selection signal Signal similar to H4 I l O j OUT CRD938A2U PIN NO j 35 36 1 SIGNAL BO Bl I I O OUT Dinit selection signal Signal similar to H4 RD938A2U PIN NO 37 1 SIGNAL 82 Segment data signals The relationship between signals and indicators are as follows I I O OUT Signal Segment Signal B2 S...

Page 20: ...l similar to B2 1 SIGNAL j GO I I O I OUT Kev strobe sinnal Signal applied to touch key section A pulse signal is input to HO H3 terminal while one of G 7 line keys on key matrix is touched RD939A3U PIN NO 44 Segment data signal Signal similar to 82 1 SIGNAL Gl I I O 1 OUT Kev strobe signal Signal applied to touch key section A pulse signal is input to HO H3 terminal while one of G 8 line keys on ...

Page 21: ... to allow the LSI to control the sensor cooking of the unit When the unit is set in the sensor cooking mode 16 seconds later the detector circuit starts to func tion and the LSI observes the initial voltage avail able 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 resistance values in parallel with R l Changing the resist...

Page 22: ...ing time Piezo electric device is used in the weight detector section When the roller below the turntable presses the knob through oven seal the piezo electric device generates the voltage according the load applied on the roller Weight sensor and then sent to A D conversion input pin A5 inside of LSI The LSI converts the value into weight and calculates the heating time Weight measurement is made...

Page 23: ...d of the touch control panel while keeping it connected to the oven B On some models the power supply cord be tween the touch control panel and the oven proper is long enough that they may be sepa rated 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 en...

Page 24: ...tor Remove the turntable and roller stay from the oven 5 Remove the two 2 screws holding the turntable cavity motor to oven cavity bottom side and remove the Remove the one 1 screw holding the turntable turntable motor motor cover to the bottom plate and remove the 6 Turntable motor is now free At this time o ring and cover washer is removed Do not loose them OVEN LAMP SOCKET REMOVAL CARRY OUT 3D ...

Page 25: ...that the blue wire and the white wires are stripped for 15 mm length as shown illustlation abortnolpmvwwQplycod 3llll 3 meWTB Of manl hsmess cofnsok CE 230 5 Wind the conductors of Blue and White wires each other 6 Insert the stripped wire leads into the connector CE 230 7 Clamp the connector CE 230 with the correct tool tightly C ct anchorage I Brown wire I Main harness I ii I i I Green Yellow wi...

Page 26: ...le for shaft of it may become bigger than a standard one Remove the two 2 screws holding the fan motor to the fan motor angle Now the fan motor is free roove joint pliers Figure C l 1 a Rear view Figure C l 2 Axis hese are the where should inched with position be pliers Rotor Figure C l 1 b Side view INSTALLATION I 2 3 4 5 Install the fan motor to the fan motor angle with the two 2 screws Install ...

Page 27: ...icrowave ovens must be used for testing Recommended instruments are NARDA 8100 NAR DA 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 2025 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 s...

Page 28: ... ri ul I m Q r co T Amit 0 I I I I 0 5 0 d i I N 47 I q j Q 1s g Figure O l a Oven Schematic OFF Condition For Australia model SCEMATIC NOTE CONDITION OF OVEN 1 DOOR CLOSED 2 COOKING TIME PROGRAMMED 3 START KEY TOUCHED 1 I 1 c 1 I i i Y i I II 15 IF LJ Figure 0 2 a Oven Schematic ON Condition For Australia model 26 ...

Page 29: ... SW ITCH TRANSFORKR RECTIFIER L i bMoNm oN whl z CnooY oo Do0 vJ o iqzoz mOrc7 A GgmZ V cmaz 1 g m0 a 2 F 1 z E I I c is 0 L 0 2 iiT 3 I 0 T 2 2 I 5 I h T 2 2 T ii z 3 H V A 4 230V 240V SOHz IST LATCH SWITCH 5 THERMAL CUT OUT 1 OVEN LA 41 3 IA n RECTIFIER 2NO LATCH SW I TCH POWER TRANSFORbER n Ic I I I T I MAOEIETRON Do2 u s z nri D o dkzq cn 0 3 m v z ...

Page 30: ...ii La 9 if Et J 7 m J3 XXI A 1 I Ll I a 2 I Iii 9 8 I5 5 f IL z z I I r i I a8 2 P i i2a 5 cl e 62 1 Ii I I I I I I h 2 co z 2 5 a z U i L if I n t L 5 e F Gh 2 2 I U 1 II I g 0 9 ZZI 1 al 4 6 Y mu ri 0 73 l l 0 U H u Eal lJal c c ll CtoC Jzooo I onu F 8 i t I iH 1 1 I 2 3 4 5 6 28 ...

Page 31: ...1 2 I 3 4 5 6 ic k c I 2 z I b I j 29 ...

Page 32: ... 4E r _ __ s 1 I ti I I I I __ 2 5 L 1 2 3 4 5 6 i IA 6 C D E F G B H I 3 SIB 3x5 BLLi nsr UB A G oc E AOP dl 013 2 gs iidJ w n 2 9 z tez B f3 z v I A 2 r 1 9 L I 1 1 t 85 pz A II ehs zi2 a 2 p r r it T k 8 n I x 24 2 x Y 30 ...

Page 33: ...R 4H54 1 I 3 1 3 I 4 5 1 B 1 I I I A r i _ Y w x X E L A 4 I 5 4 Y I i B a x B c Figure S 4 Printed Wiring Board A I r B C C 31 ...

Page 34: ...aland Model 1 AW l 20 FDTCTA115WRKO AH sensor assembly 1 BF 1 21 FDTCTA139WRKO Weight sensor assembly 1 AQ CABINET PARTS 2 1 1 AM 2 2 FHNG A172WRTO Lower oven hinge GCABUA310WRPO Outer case cabinet 1 BF 2 3 2 4 MHNG A280WRTO Upper oven hinge PCOVPA249WRPO Turntable motor cover 2 5 PCAPHA015WREO Cabinet cap 2 AD 2 6 GLEGPA023WREO Foot 4 AC CONTROL PANEL PARTS 3 1 3 1A CPWBFA496WRKO Control unit New...

Page 35: ...sistor 7 5kR F 1 4W R79 VRD B12EF473J Resistor 47kfi F 1 4W R80 VRD B12EF471J Resistor 4708 1 4w R104 RR DZA143DREO Resistor array 15Okn x 4 RllO 113VRD B12EF104JResistor 1OOkn 1 4W RYl RRLY A080DREO Relay OJ SH 124LM RY2 RRLY A076DREO Relay OMIF S 124LM SP40 RALM A014DREO Buzzer PKM22EPT CA THAI Tl RTRNPA064DREO Transformer VRSl RH VZAOlODREO Varistor TNR15G471K ZDl VHEHZGA3 1 Zener diode HZ6A 3 ...

Page 36: ...in wire harness Australian Model 1 AY FW VZB138WREO Main wire harness New Zealand Model 1 AY FW VZB139WREO Low voltage harness 1 AM TSPCNE691WRRO Rating label Australian Model 1 AH TSPCNB693WRRO Rating label New Zealand Model 1 AH TGAN A056WRRO Guarantee card New Zealand Model 1 AH LBNDKA080WREO Wire holder B 1 AD TLABMA333WRRO Menu label 1 AK UAMI A083WRFO Defrost rack 1 AS LHLDWA013WREO Purse lo...

Page 37: ...O DESCRIPTION 07 Y CODE 7 23 XNESD40 32000 Nut 7 24 XWVSD40 05000 Washer 7 25 XFTSD40PlOOOO Screw M4 x 10 HOW TO ORDER REPLACEMENT PARTS To have your order filled promptly and correctly please furnish the following information 1 MODEL NUMBER 2 REF NO 3 PART NO 4 DESCRIPTION RDP1303U 35 ...

Page 38: ...A B F G I I I Hi i I CABINET PARTS 36 ...

Page 39: ...R 4H54 6 1 I 2 3 I 4 5 7 CONTROL PANEL PARTS lP I D I c OOR PARTS _ e ___ _________ ____ e__ _ e _________ _______I_ L B C c ID I I I 7 I E 1 2 I 3 I 4 5 6 37 F j t G H 1 I I L ...

Page 40: ...R 4H54 1 I 2 3 I 4 r 5 6 MISCELLANEOUS I 4 240mm w 80 5 TOP PAD SPADBA 524 WREO PACKING ADD KIT FOR S CPADBA 11 SWRKO I I t 1 2 3 I 4 t 5 6 92 SHARP CORP 08K0 83E Printed in Australia 38 ...