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Sharp R-520LW manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    1 R- 520LK R-520L W In the interest of user-saf ety the o ven should be restored to its or iginal condition and only par ts identical to those specifi ed should be used. W ARNING T O SER VICE PERSONNEL: Micro wave ovens contain circuitry capable of producing ver y high volta g e and current, contact with following par ts may result in a se vere, p[...]

  • Page 2

    2 R- 520LK R-520L W PRECA UTIONS T O BE OBSER VED BEFORE AND DURING SER VICING T O A V OID POSSIBLE EXPOSURE T O EXCESSIVE MICR O W A VE ENERGY (a) Do not operate or allow the o ven to be oper ated with the door open. (b) Make the f ollowing saf ety checks on all o vens to be serviced before activ ating the magnetron or other microw av e source, an[...]

  • Page 3

    3 R- 520LK R-520L W W ARNING T O SER VICE PERSONNEL Microw av e o vens contain circuitry capab le of pro- ducing very high voltage and current, contact with f ollowing par ts ma y result in a se vere , possibly f atal, electr ical shock. (Example) H ig h V ol t a g e C ap a c i t o r , H i gh V o l ta g e Powe r T ransf or mer , Magnetron, High V o[...]

  • Page 4

    4 R- 520LK R-520L W MICR O W A VE MEASUREMENT PROCEDURE A. Requirements: 1) Micro wav e leakage limit (P ower density limit): The power density of microw av e radiation emitted by a microwa ve ov en should not e xceed 1mW/cm 2 at any point 5cm or more from the external surf ace of the ov en, measured pr ior to acquisition b y a purchaser , and ther[...]

  • Page 5

    5 R- 520LK R-520L W SHARP ELECTRONICS CORPORA TION SHARP PLAZA, MAHW AH, NEW JERSEY 07430-2135 SER VICE MANU AL MICRO W A VE O VENS R-520LK/R-520L W FOREWORD This Manual has been prepared to provide Shar p Electronics Cor p . Service P ersonnel wi th Operation an d Ser vice Inf ormation f or the SHARP MICRO W A VE O VENS R-520LK and R-520L W . It i[...]

  • Page 6

    6 R- 520LK R-520L W TOUCH CONTR OL P ANEL GENERAL INFORMA TION GROUNDING INSTR UCTIONS This ov en is equipped with a three prong g rounding plug. It must be plugged into a wall receptacle that is properly installed and grounded in accordance with the National Electrical Code and local codes and ordinances. In the ev ent of an electrical shor t circ[...]

  • Page 7

    7 R- 520LK R-520L W 15 or 20 amp. fused electrical supply . It is recommended that a separate circuit serving only this appliance be pro vided. When installing this ap- pliance, observe all applicab le codes and ordinances. A shor t power-supply cord is provided to reduce r isks of becoming entangled in or tripping ov er a longer cord. Where a two-[...]

  • Page 8

    8 R- 520LK R-520L W OPERA TION DESCRIPTION OF OPERA TING SEQUENCE The f ollowing is a descr iption of component functions dur- ing ov en operation. OFF CONDITION Closing the door activ ates the door sensing switch and pri- mar y interlock switch. (In this condition, the monitor s witch contacts are opened.) When ov en is plugged in, 120 v olts A.C [...]

  • Page 9

    9 R- 520LK R-520L W SENSOR COOKING CONDITION Using the SENSOR function, food is cook ed without figur- ing time, power le vel or quantity . When the oven senses enough steam from the food, it rela ys the inf or mation to its microprocessor which will calculate the remaining cooking time and pow er lev el needed f or best results. When the f ood is[...]

  • Page 10

    10 R- 520LK R-520L W Figure O-2 Oven Schematic - Cooking Condition Figure O-1 Ov en Schematic - Off Condition SCHEMA TIC NO TE: CONDITION OF O VEN 1. Door Closed 2. CLOCK APPEARS ON DISPLA Y SCHEMA TIC 3. V ARIABLE COOKING CONTROL "HIGH" 2. COOKING TIME PROGRAMMED 1. DOOR CLOSED NO TE: CONDITION OF O VEN 4. "ST AR T" P AD T OUCH[...]

  • Page 11

    11 R- 520LK R-520L W DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM The door is opened by pushing the open button on the con - trol panel, ref er to the Figure D-1. When the open b utton is pushed, the open button pushes up the switch le ver , and then the s witch le ver pushes up the latch head. The latch heads are mov ed upward and re[...]

  • Page 12

    12 R- 520LK R-520L W TR OUBLESHOO TING GUIDE Never touch any par t in the circuit with y our hand or an uninsulated tool while the power supply is con- nected. When troubleshooting the microw ave oven, it is helpful to follo w the Sequence of Operation in performing the checks. Many of the possible causes of trouble will require that a specific te[...]

  • Page 13

    13 R- 520LK R-520L W A MA GNETRON ASSEMBL Y TEST 1. Disconnect the pow er supply cord, and then remove outer case . 2. Open the door and bloc k it open. 3. Discharge high voltage capacitor . TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Home fuse or circuit breaker blows when power cord is plugged into wall receptacle C/T fuse blows when power co[...]

  • Page 14

    14 R- 520LK R-520L W B PO WER TRANSFORMER TEST 1. Disconnect the power supply cord, and then remo ve outer case . 2. Open the door and bloc k it open. 3. Discharge high voltage capacitor . 4. Disconnect the primar y input ter minals and measure the resistance of the transformer with an ohmmeter . Chec k f or continuity of the coils with an ohmmeter[...]

  • Page 15

    15 R- 520LK R-520L W TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 1. Disconnect the pow er supply cord, and then remove outer case . 2. Open the door and bloc k it open. 3. Discharge high voltage capacitor . 4. If the capacitor is open, no high voltage will be av ailable to the magnetron. Disconnect input leads and check f or shor t or open betw[...]

  • Page 16

    16 R- 520LK R-520L W TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 1. Disconnect the pow er supply cord, and then remove outer case . 2. Open the door and bloc k it open. 3. Discharge high voltage capacitor . 4. Isolate the switch and connect the ohmmeter to the common (COM.) and nor mally open (NO) terminal of the s witch. The meter should indic[...]

  • Page 17

    17 R- 520LK R-520L W TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Therefore, unlike con ventional micro wave ovens, proper maintenance cannot be performed with only a v oltmeter and ohmmeter . In this service manual, the touch control panel assemb ly is divided into two units, Control Unit and Ke y Unit, and also the Control Unit is divided into[...]

  • Page 18

    18 R- 520LK R-520L W 2. Control Unit The f ollowing symptoms indicate a defectiv e control unit. 2-1 In connection with pads . a) When touching the pads, a cer tain group of pads do not produce a signal. b) When touching the pads, no pads produce a signal. 2-2 In connection with indicators a) At a cer tain digit, all or some segments do not light u[...]

  • Page 19

    19 R- 520LK R-520L W W ARNING : The o ven should be fully assemb led before f ollowing procedure . (1) Open the door . (2) Place one cup of water in the center of the turntable tra y in the ov en cavity (3) T ouch the " Defrost " pad once. (4) Press "2", then press "5". (5) T ouch the "ST AR T " pad. (6) The [...]

  • Page 20

    20 R- 520LK R-520L W TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 1. F oil patter n check and repairs. 1) Disconnect the pow er supply cord, and then remove outer case . 2) Open the door and block it open. 3) Discharge high voltage capacitor . 4) Follo w the troubleshooting guide given belo w for repair . STEPS OCCURRENCE CA USE OR CORRECTION 1 [...]

  • Page 21

    21 R- 520LK R-520L W W ARNING : The ov en should be fully assembled bef ore following procedure . (1) The ov en should be plugged in at least two minutes bef ore sensor cooking. (2) Room temperature should not e xceed 95½F (35½C). (3) The unit should not be installed in an y area where heat and steam are generated. The unit should not be installe[...]

  • Page 22

    22 R- 520LK R-520L W If new sensor dose not oper ate proper ly , the problem is with the control unit, and ref er to explanation belo w . CHECKING CONTROL UNIT (1) Disconnect the power supply cord, and then remo ve outer case. (2) Open the door and bloc k it open. (3) Discharge high voltage capacitor . (4) Disconnect the sensor connector that is mo[...]

  • Page 23

    23 R- 520LK R-520L W 3) Po wer Source Cir cuit This circuit generates voltages necessar y in the control unit from the A C line voltage. In addition, the synchronizing signal is av ailable in order to compose a basic standard time in the clock circuit. Symbol V oltage Application VSS -5V LSI(IC1) 4) Relay Circuit A circuit to dr ive the magnetron, [...]

  • Page 24

    24 R- 520LK R-520L W Maximum output 70% of maximum output H : GND L : -5V H : GND L : -5V ON ON OFF OFF OFF 24 sec. 8 sec. 1-2 VL2-VL1 IN P ower sour ce voltage input terminal. Standard v oltage for LCD . 3-6 AN7-AN4 IN T erminal to change cooking input according to the Model. By using the A/D con ver ter contained in the LSI, DC voltage in accorda[...]

  • Page 25

    25 R- 520LK R-520L W 25 P41 IN Signal similar to AN3. When either G11 line on k ey matr ix is touched, a corresponding signal will be input into P41. 26 P40 IN Connected to GND through the pull-down resistor . 27 RESET IN A uto clear terminal. Signal is input to reset the LSI to the initial state when pow er is applied. 28 P71 IN Signal similar to [...]

  • Page 26

    26 R- 520LK R-520L W Connected to LCD . The relation between signals are as f ollows: LSI signal (Pin No .) LCD (Pin No .) LSI signal (Pin No .) LCD (Pin No .) SEG0 (72) .................................. SEG 0 SEG11 (61) ................................ SEG 11 SEG1 (71) .................................. SEG 1 SEG12 (60) ..........................[...]

  • Page 27

    27 R- 520LK R-520L W (1) Structure of Absolute Humidity Sensor The absolute humidity sensor includes tw o ther mistors as shown in the illustration. One ther mistor is housed in the closed v essel filled with dry air while another in the open vessel. Each sensor is provided with the protectiv e cov er made of metal mesh to be protected from the e [...]

  • Page 28

    28 R- 520LK R-520L W 1. Precautions for Handling Electr onic Components This unit uses CMOS LSI in the integ ral par t of the circui ts. When handling these par ts, the follo wing precautions should be strictly f ollowed. CMOS LSI hav e e xtremely high impedance at its input and output ter minals. F or this reason, it is easily influenced by the s[...]

  • Page 29

    29 R- 520LK R-520L W T o remove the outer case , proceed as follo ws. 1. Disconnect the power supply cord. 2. Open the ov en door and bloc k it open. 3. Remov e the two (2) screws from the lower por tion of the rear cabinet using a T20H T orx type or GTXH20-100 screw driv er . 4. Remov e the remaining two (2) screws from rear . 5. Slide the entire [...]

  • Page 30

    30 R- 520LK R-520L W PO WER TRANSFORMER REMO V AL Re-install 1. Rest transf or mer on the bottom plate with its primar y ter minals tow ard the ov en face plate. 2. Secure transf or mer with f our screws to bottom plate. 3. Re-connect wire leads (pr imar y and high voltage) to pow er tr ansformer and filament leads of transformer to magnetron and [...]

  • Page 31

    31 R- 520LK R-520L W POSITIVE LOCK ® CONNECT OR (NO-CASE TYPE) REMO V AL Figure C-2. P ositive lock ® connector 1. Disconnect the power supply cord, and then remov e outer case. 2. Open the door and bloc k it open. 3. Discharge high voltage capacitor . 4. Push the le ver of positiv e lock ® connector . 5. Pull down on the positiv e lock ® conne[...]

  • Page 32

    32 R- 520LK R-520L W 2. Remov e tur ntable and tur ntable suppor t from oven cavity . 3. La y the ov en on it's backs ide. Remo ve the turntabl e motor cov er by snipping off the material in f our cor ners. 4. Where the cor ners hav e been snipped off bend cor ner areas flat. No shar p edges must be e vident after remov al of the tur ntable m[...]

  • Page 33

    33 R- 520LK R-520L W COOLING F AN MO T OR REMO V AL REMO V AL 1. Disconnect the power supply cord and then remov e outer case. 2. Open the door and bloc k it open. 3. Discharge high voltage capacitor . 4. Disconnect the wire leads from the f an motor . 5. Remov e the two (2) screws holding the fan motor to the ov en cavity bac k plate. 6. Remov e t[...]

  • Page 34

    34 R- 520LK R-520L W 3. Secure latch hook (with two (2) mounting screws) to ov en flange. 4 . Make sure that the monitor s witch is oper ating properly and check continuity of the monitor circuit. Ref er to chapter "T est Procedure" and Adjustment procedure. DOOR SENSING SWITCH/PRIMAR Y INTERLOCK SWITCH AND MONIT OR SWITCH ADJUSTMENT 1. [...]

  • Page 35

    35 R- 520LK R-520L W 9. Release the door panel from twelve (12) tabs of door frame. 10. Remov e the door panel from the door frame . 11. Now , door panel with sealer film is free. 12. T ear sealer film from door panel. 13. Now , door panel is free. 14. Slide latch head upward and remo ve it from door fr ame with releasing latch spring from door f[...]

  • Page 36

    36 R- 520LK R-520L W 6 4 5 1 2 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H Figure S-1. Pictorial Diagram HIGH VOLTAGE CAPACITOR HIGH VOLTAGE WIRE A H.V. RECTIFIER HIGH VOLTAGE COMPONENTS OVEN LAMP AND SOCKET MAGNETRON COM. MONITOR SWITCH N.C. PRIMARY SWITCH TURNTABLE MOTOR POWER TRANSFORMER COM. NO WHT RED RED ORG GRY ORG WHT WHT WHT RED RED CAVI[...]

  • Page 37

    37 R- 520LK R-520L W 6 4 5 1 2 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H Figure S-3. Control Unit Cir cuit[...]

  • Page 38

    38 R- 520LK R-520L W 6 4 5 1 2 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H Figure S-5 . Printed Wiring Board of P ower Unit R Y1 R Y2 E C B E C B E C B VRS1 L1 D7 D3 P S D4 C2 D1 C1 D2 R8 R7 R2 R4 Q3 Q4 SP1 T1 D6 DZ1 WH-2 WH-2 LED Q2 D5 D8 D30 1 2 J1 J6 J2 J5 R5 C4 C5 CN-B CN-F 1 2 3 C10 D I P C H I P S I D E R90 J3 D31 R3 R6 E B 1 1 2 2 Q1[...]

  • Page 39

    39 R- 520LK R-520L W REF . NO . P ART NO . § DESCRIPTION Q'TY CODE P AR TS LIST Note: The par ts marked “ ∆ ” may cause undue micr owave e xposure . The parts marked “*” are used in volta g e more than 250V . "§" MARK: P AR TS DELIVER Y SECTION. ∆ ELECTRIC P ARTS 1- 1 RC-QZB018MRE0 M High voltage capacitor 1 AQ 1- 2 FH-[...]

  • Page 40

    40 R- 520LK R-520L W HO W T O ORDER REPLACEMENT P ARTS T o ha ve your order filled promptly and correctly , please fur nish the follo wing information. 1. MODEL NUMBER 2. REF . NO . 3. P ART NO . 4. DESCRIPTION Order P ar ts from the author ized SHARP par ts Distributor f or your area. Def ective par ts requiring retur n should be retur ned as ind[...]

  • Page 41

    41 R- 520LK R-520L W 6 4 5 1 2 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H O VEN AND CABINET P ARTS 2-3 4-7 6-5 1-4 4-6 4-8 4-9 6-3 6-2 2-1 7-5 1-9 4-10 7-2 7-2 7-4 4-3 1-10 1-7 7-3 7-6 7-5 7-6 4-2 7-4 1-8 7-1 1-6 1-6 4-4 7-1 4-1 1-1 1-2 2-2 2-2 2-2 2-2 7-4 7-4 4-11 7-4 6-4 1-11 7-4 7-7 7-4 7-7 1-5 1-3 4-5 7-4 7-4 1-13 4-12 1-12 1-5 4-13 7-5 7-2 [...]

  • Page 42

    42 R- 520LK R-520L W 6 4 5 1 2 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H CONTROL P ANEL P ARTS DOOR P ARTS MISCELLANEOUS Actual wire harness may be different from illustration. 6-7 6-1 5-5 5-6 5-4 5-9 5-2 5-11 5-1 5-3 5-8 5-10 5-7 3-8 3-9 3-3 3-6 3-10 3-7 3-4 3-2 3-5 3-11 3-1[...]

  • Page 43

    43 R- 520LK R-520L W P A CKING AND ACCESSORIES DOOR PROTECTION SHEET PLASTIC BAG PACKING CASE TOP PAD ASSEMBLY I N T O T H E O V E N C A V I T Y 6-3 TURNTABLE TRAY 6-6 OPERATION MANUAL BOTTOM PAD ASSEMBLY TRAY HOLDER 6-2 TURNTABLE SUPPORT O N T O P O F T H E O V E N N o n - r e p l a c e a b l e i t e m s[...]

  • Page 44

    44 R- 520LK R-520L W 2006 SHARP CORP . (5M2.00E) Printed in U.S.A COPYRIGHT © 2006 BY SHARP CORPORA TION ALL RIGHTS RESER VED . No part of this pub lic atio n ma y be rep roduc ed, stored in retriev al systems, or transmitted in any f or m or by any means, electronic, mechanical, photocop ying, recording, or otherwise, without prior written permis[...]