Sharp R-9370 Service Manual Download Page 26 | Manualshive

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Summary of Contents for R-9370

Page 1: ...n in addition compared to its base model R 9360 Use this supplemental manual together with the Base Service Manual Refer to the Base Service Manual for complete operation service information etc cc TABLE OF CONTENTS Y Page FOREWORD 1 CAUTION MICROWAVE RADIATION 1 THUMB INDEX 1 PRODUCT DESCRIPTION 2 OPERATING INSTRUCTIONS 3 SERVICING 6 TOUCH CONTROL PANEL ASSEMBLY 8 MICROWAVE MEASUREMENT 21 SCHEMAT...

Page 2: ...ase manual and this manual so they will be qualified to render satisfactory customer service CAUTION MICROWAVE RADIATION Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating devices if it is improperly used or connected All input and output microwave connections waveguides flanges and gaskets must be secured Never operate the de...

Page 3: ...ules are changing direction every half cycle or oscillating back and forth 4 900 000 000 times per second This high speed oscil lation causes friction between the molecules thereby convert ing the microwave energy to heat SPECIFICATIONS ITEMS Power requirements DESCRIPTIONS 240v 50Hz Single phase 3 wire earthed Power consumption Microwave output power Case dimensions Width Height Depth Cooking cav...

Page 4: ...cooking the programme cannot be changed until the STOP CLEAR pad is touched twice All functions are locked in to prevent accidental changes If food does not seem to be heating properly check the indicator immediately below the lighted digital display Be sure the Variable Cooking Control is on the proper setting If the electrical power supply to your microwave oven should be interrupted the display...

Page 5: ... will help to equalize temperatures 6 If the Reheat Sensor has not detected the vapor of the food after 15 minutes E c c3 c and IRE 1 will appear in the display and the oven will shut off Selecting Foods 1 Reheat Sensor works with foods at normal storage temperature For example chicken pieces would be at refrigerator temperature and canned soup at room temperature 2 A minimum quantity of a half cu...

Page 6: ...d opening the oven door or touching STOP CLEAR pad when ml m EISTl is displayed If this occurs 1 and IRE 1 1 will appear and sensor heating will be interrupt ed To continue heating touch STOP CLEAR pad 1 and 1 I indicator will go out Select heating time and variable power level Heating with the Reheat Sensor at this point may result in overheating Reheat Chart FOOD QUANTITY soup Dinner Plate Casse...

Page 7: ...pen and or short Procedure K Defective control unit Procedure K Open or loose wire connection to the above Check and repair wiring components TEST PROCEDURES CONT D PROCEDURE LETTER COMPONENT TEST J KEY UNIT TEST If the Indicator does not respond to touching a key Pad use the following matrix and place a jumper wire between the proper pin connections with the G 1a pin cable disconnected from the c...

Page 8: ...ons in Servicing of Touch Control Panel Besides it is needed to connect the parts as shown in Fig A to the connector C to enable checking of the REHEAT SENSOR 2 Check the sensor cook operation proceed as follows 2 l Touch REHEAT SENSOR pad 2 2 The control panel is in the sensor cooking operation 2 3 After approximately 40 seconds push plunger of MICRO switch This condition is same asjudgement by R...

Page 9: ...cuit from the AC line voltage In ad dition the synchronizing signal is available in order to compose a basic standard time in the clock circuit 2 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 the commercial frequency 3 LSI IX2412YA This LSI controls...

Page 10: ...u 6 I i l l l i i i E 11 11j 4 b 11 I 111 g 7 OTQ 1 1 l kd Y i 1 I 1 i x o I i I I iji in f i i I Y p J IlV I lyJ 1 j j iI m o iq T N v z y q II I i ask 4 2 1 ir 4 g g 5 3 co 4 2 L P n v a LIL sg _u ui 9 I 1 I I I 7 r 1 1 dzz 1 1 1 i r i 11 h 1 n s 7 h h 5 m m Ah I wi 1 i i ri 1 81 1 111 ZL J ...

Page 11: ...2 P33 ACL CL1 ci2 P40 TEST P41 P42 P43 P50 P51 P52 P53 P60 P61 P62 P63 P70 P71 P72 P73 1 1 24 KT 1 25 1 58 l i 57 IX2412YA GND P23 P22 P21 P20 PA0 PA1 VR Vdisp PA2 PA3 PA4 PA5 PA6 PA7 PA8 PA9 AGND P13 P12 Pll PlO PO3 PO2 PO1 PO0 P93 P92 P91 P90 P83 P82 Figure T 2 Relationship between pin Nos and Signals LSI IX2412YA 10 ...

Page 12: ...CL2 OUT Internal clock oscillation frequency control output Output to control oscillation input of CLl 8 P41 OUT Segment data signal Signal similar to P30 9 TEST IN Not used Connected to VDD 12V 10 P40 OUT Segment data signal Signal similar to P30 11 P42 OUT OUT Signal for lighting of Power level and COMPU indicators 12 13 P43 P50 Signal similar to P30 OUT Signal for lighting of COOK AUTO and kg i...

Page 13: ...is input to PlO P13 terminal while one of G 5 line keys on key matrix is touched Key strobe signal Signal applied to touch key section A pulse signal is input to PI0 P13 terminal while one of G 6 line keys on key matrix is touched 25 KT 26 KI 27 so IN Terminal not used IN OUT Signal to sound buzzer A Key touch sound 0 12 sec 6 Completion sound A B 28 NC 29 VDD 30 P80 31 P81 32 GND 33 P82 34 P83 35...

Page 14: ...s touched a corresponding signal out of P70 P73 P63 and P62 will be input into PlO When no key is touched the signal is held at L level 44 Pll IN 45 P12 IN Signal similar to PIO When either one of G 10 line keys on key matrix is touched a corresponding signal will be input Pll Signal similar to PIO When either one of G 9 line keys on key matrix is touched a corresponding signal will be input P12 4...

Page 15: ...ng microwave cooking and L level while not cooking In other cooking modes HIGH M HIGH MED M LOW LOW the signal turns to H level and L level in repetition according to the power level HIGH J MED HIGH p n MED oF c f MED LOVVj f LOW 32 sec cl HOLD L 56 Vdisp IN Anode segment of Fluorescent Display light up voltage 27V Vp voltage of power source circuit input 57 VR IN Reference voltage input terminal ...

Page 16: ...POWER SOURCE CIRCUIT A power of AC 240V is applied to the primary winding of smoothed by the electrolytic capacitor C2 to become DC transformer Tl voltage VC Then the voltage VC is delivered to the constant The output voltage of the secondary winding of transformer voltage circuit Tl is then full wave rectified by the diode bridge Dl and VDD l2V is a voltage to be applied to the LSI Tl Dl POWER SU...

Page 17: ... 4 13Circuit and Waveform ACL CIRCUIT By switching on power charge current il is fed to C20 through R20 and generates throshold voltage Vz If Vz exceeds the zener voltage of ZD20 ZD20 is turned on and the current 2 flows Thus placing voltage on to the base of transistor 020 and turning it on A reset signals is obtained from the collector C21 Noise filter capacitor GND a v w v I 1 Q20 j z il r 1 I ...

Page 18: ...3 terminal of relay RYI LSI The pulse signal form PA3 terminal is applied to the rec The H level signal from D6 terminal is applied to 080 which tifier circuit made up of Diodes DIOO and DlOl inside the hybrid IC IC3 where it is made into DC signal to charge is connected in series with QlOl and current i2 made only when both Q80 and QlOl are turned on at the same time ClOO With Cl00 charged up QIO...

Page 19: ...resistance lower Therefore a VOUT voltage is generated in proportion to the variation of vapor volume Internal Structure al Fft i Sensor Figure T 8 Operational amplifier Rf output voltage 2 Reheat Sensor Circuit This circuit is composed of a part which transmits a change of the reheat sensor voltage to PO0 terminal of LSI and of the which supplies a constant current to the temperature sensi tive r...

Page 20: ... anode to illuminate the fluorescent body If the anode or grid voltage is zero or negative against the fila ment thermo electrons can not reach the anode hence the fluorescent body is not luminescent In this model the Fluorescent Display B digits 13 segments are used for displaying figures The Fluorescent Display employs the dynamic drive method when the high level of anode signal and grid signal ...

Page 21: ... touch control panel while 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 models 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 ...

Page 22: ...ance standard for microwave ovens must be used for testing Recommended instruments are NARDA 8100 NARDA 8200 HOLADAY HI 1500 SIMPSON 380M 2 Place the turntable tray into the oven cavity 3 Place the load of 275 15ml of water initially at 2O C in the centre of the oven tray The water container should be a low form of 600ml beaker with inside diameter of approx 8 5cm and made of an electrically non c...

Page 23: ...R 9370 __ T Q 0 zlE i 5 G 5 E D I ii 8 8E r 0 6 3 L a 0 8 urn T L 1 4 I 1 I 1 nI i J 11 0 i iz a n z 5 CI 0 e i 0 a CI ii 2 s 1 1 2 I 3 I 4 5 6 22 ...

Page 24: ...I I G I n m u I 0 I m I b Figure S 3 Control Panel Circuit ...

Page 25: ...I O lAH8 1 AYP q 0 q d000cJ0000clcJ cJAcJ c i 1 2 50 e j pi083tiR c91 ll An c9o l L I 0 3 0 P 1 2 3 4 5 I 6 TI L d n QL TT M FM tiY VRSI 4 c CN A l p 0 L I 0 t 1 I 2 Figure S 4 Printed Wiring Board 3 4 5 I 6 24 ...

Page 26: ...70WRY0 2 2 GDAi 0271WRP0 2 3 GLEGP0021WREO 2 4 GCABU0235WRPO 2 5 TMAPCA126WRRO 2 6 LSTPP0065WRFO 2 7 LSTPP0066WRFO 2 8 LBNDK0071WRWO 2 9 XWHNZ57 15100 2 10 FHNG 0107WRY0 2 11 IPSPAGQ002YBEO Vibration proof cushion 3 1 3 1A 3 1B i 3 1c 3 1D 3 1E CPWBF196SWRKO QPLGJ2381YAZZ QPLGJ2255YAZZ QPLGJ2362YAZZ QPLGJ2299YAZZ QPLGJ2332YAZZ Control unit 7 pin connector A 3 pin connector B 3 pin connector C 2 pi...

Page 27: ...llESl 1 Diode llES1 2 AB D3 VHDlSS133 1 Diode lSS133 1 AA D80 D81 VHDUSlO 60 l Diode US1060 2 AA Fl QFS A2010YAZZ Fuse 1 AF ICl RH iX2412YAZZ LSI 1 AV IC2 RH i X 2 4 14 Y A Z Z Regulator IC AN79L12 1 AE IC3 RH iX2413YAZZ Hybrid IC 1 AL IC4 QI Ii CA4 189KAZZ Hybrid IC 1 AL Ll RCiLF2003YAZZ Coil 22pH 1 AC Ql VS 2 SA7 15 B 1 Transistor 2SA715B C 1 AD 420 VSDTA 14 3 A l Transistor DTA143EA 1 AB Q30 Q8...

Page 28: ...V F 0 14 0 W R E 0 Open Device 1 AG 3 6 XPNSD8 O O 0 0 Pin 1 AA 3 7 PCUSU0490WRPO Shading cushion 1 AB 3 8 GMAD i 0 0 5 0 WR F 0 Display filter A 1 AF 3 9 PF i LWAO 17WRP 0 Display filter B 1 AB OVEN PARTS 4 1 DOVN 0 2 4 3WRT 0 Oven cavity 1 BM 4 2 PCbVPO 2 7 9WRE 0 Waveguide cover 1 AF 4 3 PCLiCQOOlYBEO Clip 3 AA 4 4 PF i LWO 0 3 5WRP 0 Oven lamp filter 2 AB 4 5 NTNT 0 0 6 8WR F 0 Turntable tray ...

Page 29: ...K0 Lower sash assembly 1 AU 4 28 A HDECQA036WRFO Lowersash 1 AN 4 28 B LANGT 0 4 1 7WRW0 Lower sash mounting plate 1 AG 4 28 C PS LDMO 3 6 4WR E 0 Ferrite same as 4 27C 1 AH 4 29 HDECCAO 3 4WRF 0 Left sash 1 AG 4 30 PCGVPA 0 5 6WRW0 Sensor cover 1 AD DOOR PARTS I 5 1CDORFAO 8 OWRKO 1 Complete door assembly I 1 I BN I 6 1 6 2 6 3 6 4 6 5 6 6 6 7 6 8 MISCELLANEOUS QW Q Z 0 1 6 4WR E 0 High voltage w...

Page 30: ...crew oven lamp socket left sash assembly mtg 4 AA 7 16 L X CZ 0 0 7 4WR E 0 Screw upper oven hinge and lower oven hinge mtg 5 AA 7 17 XCTDS 4 0 P 1 2 0 0 0 Screw cabinet base B upper sash assembly and lower 11 AA sash assembly rear cabinet mtg 7 18 XWV S D 3 5 0 4 0 0 0 Washer control unit mtg 2 AA 7 19 LX NZ 0 0 7 0 WR E 0 Nut earthing mains supply cord mtg 1 AA 7 20 XN E SD4 O 3 2 0 0 0 Nut fan ...

Page 31: ...R 9370 1 2 I 3 I 4 I 5 I 6 1 CABINET PARTS P 7 17 I 0 2 9 0 7 16 1 2 I 3 I 4 I 5 I 6 30 ...

Page 32: ...R 9370 1 I 2 3 I 4 5 I 6 1 I OVEN PARTS except rear cabinet 1 I 2 I 3 4 I 5 I 6 31 ...

Page 33: ...R 9370 1 I 2 I 3 I 4 I 5 I 6 CONTROL PANEL PARTS 3 2 o 3 3 k a 32 ...

Page 34: ...R 9370 1 I 2 3 4 I 5 I 6 I DOOR ASSEMBLY L MISCELLANEOUS TRANs CAP 1 0 a 6 I MAG CAP 1 f F c i t 1 I 2 I 3 4 I 5 I 6 33 ...

Page 35: ...CESSORIES CABINET PROTECTION SHEET SPADP0307WREO MICROWAVE OVEN PLASTIC BAG PACKING ADD KIT CPADB0222WRKO DOOR PROTECTION SHEET TRAY HOLDER SPADF0440WREO PACKING CASE SPAKCA212WREO 86 0 SHARP CORP 6N0 8E Printed in Japan 34 ...

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