Sharp R-204 Manuale di Servizio

R-204EWAMICROWAVE OVENIn the interest of user-safety the oven should be restored to its originalcondition and only parts identical to those specified

8R-204EWADESCRIPTION AND FUNCTION OF COMPONENTSDOOR OPEN MECHANISMThe door is opened by pulling the door, refer to the FigureD-1.Figure D-1. Door Open

9R-204EWATROUBLESHOOTING GUIDENever touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected.When troub

10R-204EWAA MAGNETRON ASSEMBLY TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Discharge hig

11R-204EWAB POWER TRANSFORMER TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Discharge high

12R-204EWATEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it op

13R-204EWATEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it op

14R-204EWAH BLOWN C/T FUSE TESTTEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the

15R-204EWA2) Open the door and block it open.3) Discharge high voltage capacitor.4) Replace the key unit.5) Reconnect all leads removed from component

16R-204EWA(1) Place one cup of water in the center of the turntable tray in the oven cavity.(2) Close the door, touch the " EXPRESS DEFROST "

17R-204EWATEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Foil pattern check and repairs.1) Disconnect the power supply cord and then remove outer case

R-204EWAPRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVEENERGY(a) Do not operate or allow the ov

18R-204EWAThe touch control section consists of the following units asshown in the touch control panel circuit.(1) Key Unit(2) Control UnitThe princip

19R-204EWADESCRIPTION OF LSIThe I/O signal of the LSI are detailed in the following table.Pin No. Signal I/O Description1 RESET IN Auto clear terminal

20R-204EWAPin No. Signal I/O Description23 P23 INSignal similar to K02.When either G7 line on key matrix is touched, a corresponding signal will be in

21R-204EWA1. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of thecircuits. When handling these parts, the

22R-204EWATo remove the outer case, procedure as follows.1. Disconnect the power supply cord.2. Open the oven door and block it open.3. Remove the two

23R-204EWACAUTION: 1. DISCONNECT OVEN FROM POWER SUP-PLY BEFORE REMOVING OUTER CASE.2. DISCHARGE THE HIGH VOLTAGE CA-PACITOR BEFORE TOUCHING ANY OVENC

24R-204EWACOOLING FAN MOTOR REMOVALCONTROL PANEL ASSEMBLY REMOVAL1.Disconnect the power supply cord and remove outer case.2. Open the door and block i

25R-204EWACAUTION:• Make sure that no metal pieces enter the gapbetween the rotor and the stator of the fanmotor. Because the rotor is easily damaged

26R-204EWA DOOR REPLACEMENTDOOR SENSING SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT1.Disconnect the power supply cord and remove

27R-204EWAupper and lower oven hinges by lifting up.8. Now, door panel is free from oven cavity.9. Release door panel from ten (10) tabs of door frame

1R-204EWAWARNING TO SERVICE PERSONNELMicrowave ovens contain circuitry capable of pro-ducing very high voltage and current, contact withfollowing part

28R-204EWAFigure S-1. Pictorial DiagramWHTREDWHTWHTHIGH VOLTAGE COMPONENTSMAGNETRONHIGH VOLTAGECAPACITORH.V.RECTIFIERMONITOR SWITCHTURNTABLEMOTORFAN M

29R-204EWAFigure S-2. Control Panel Circuit645123645123ABCDEFGHABCDEFGH+–+–+–A 3A 1NOCOMG10G 9G 8G 7G 6 G 5 G 4 G 3 G 2 G 1B 2B 1AC(N)T1POWER UNITabdc

30R-204EWAPARTS LISTNote: The parts marked “∆” may cause undue microwave exposure.The parts marked “*” are used in voltage more than 250V.REF. NO. PAR

31R-204EWAHOW TO ORDER REPLACEMENT PARTSTo have your order filled promptly and correctly, please furnish the following information.1. MODEL NUMBER

32R-204EWA645123645123ABCDEFGHABCDEFGHOVEN AND CABINET PARTS7-82-17-87-107-107-97-57-5A4-64-44-97-17-87-74-107-11-47-87-87-84-12-22-37-87-87-84-132-37

33R-204EWA645123645123ABCDEFGHABCDEFGH5-36-56-65-55-25-45-85-85-65-75-1Actual wire harness may be different than illustration.3-26-103-2-23-2-13-33-13

34R-204EWA2001 SHARP CORP. (6S1.700E) Printed in U.S.ACOPYRIGHT © 2001 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publication may be repr

2R-204EWAMICROWAVE MEASUREMENT PROCEDUREA. Requirements:1) Microwave leakage limit (Power density limit): The power density of microwave radiation emi

3R-204EWASHARP ELECTRONICS CORPORATIONSHARP PLAZA, MAHWAH,NEW JERSEY 07430-2135SERVICE MANUALMICROWAVE OVENR-204EWAFOREWORDThis Manual has been prepar

4R-204EWAGENERAL INFORMATIONGROUNDING INSTRUCTIONSThis oven is equipped with a three prong grounding plug. It must be plugged into a wall receptacle t

5R-204EWA15 or 20 amp. fused electrical supply. It is recommended that a separate circuitserving only this appliance be provided. When installing this

6R-204EWAOPERATIONDESCRIPTION OF OPERATING SEQUENCEThe following is a description of component functions duringoven operation.OFF CONDITIONClosing the

7R-204EWAFigure O-1. Oven Schematic-Off ConditionSCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED2. CLOCK APPEARS ON DISPLAYSCHEMATICNOTE: CONDITION OF