Sharp R-330BW Service Manual

R-330BKR-330BWIn the interest of user-safety the oven should be restored to its originalcondition and only parts identical to those specified should b

8R-330BKR-330BWDESCRIPTION AND FUNCTION OF COMPONENTSDOOR OPEN MECHANISMThe door is opened by pushing the open button on thecontrol panel, refer to th

9R-330BKR-330BWTROUBLESHOOTING GUIDENever touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected.When

10R-330BKR-330BWA MAGNETRON ASSEMBLY TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Dischar

11R-330BKR-330BWB POWER TRANSFORMER TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Discharg

12R-330BKR-330BWTEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block

13R-330BKR-330BWTEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block

14R-330BKR-330BWH BLOWN MONITOR FUSE TESTTEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2

15R-330BKR-330BW7) Reconnect the power supply cord after the outer case is installed.8) Run the oven and check all functions.The following symptoms in

16R-330BKR-330BWWARNING : The oven should be fully assembled before following procedure.(1) Place one cup of water in the center of the turntable tray

17R-330BKR-330BWTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTTo protect the electronic circuits, this model is provided with a fine foil pattern added

R-330BKR-330BWPRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVEENERGY(a) Do not operate or allow

18R-330BKR-330BWTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTN AH SENSOR TESTChecking the initial sensor cooking conditionWARNING : The oven should be

19R-330BKR-330BWTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTCHECKING CONTROL UNIT(1) Disconnect the power supply cord, and then remove outer case.(2)

20R-330BKR-330BWTOUCH CONTROL PANEL ASSEMBLYOUTLINE OF TOUCH CONTROL PANELThe touch control section consists of the following units.(1) Key Unit(2) Co

21R-330BKR-330BWLSI(IZA866DR)The I/O signal of the LSI(IZA866DR) is detailed in the following table.Pin No. Signal I/O Description1 AN8 IN Signal comi

22R-330BKR-330BWPin No. Signal I/O DescriptionAB0.1 sec.2.0 sec.H : GNDL : -5VH : GNDL : -5V22 P30 OUT Signal to sound buzzer (2.0 kHz).A: key touch s

23R-330BKR-330BWPin No. Signal I/O Description16.7 msec.During cookingH : GNDL : -5VP-HIH : GNDL : -5VH : GNDL : -5VP-70ONONOFFOFF OFF24 sec.8 sec.16.

24R-330BKR-330BW(1) Structure of Absolute Humidity SensorThe absolute humidity sensor includes two thermistorsas shown in the illustration. One thermi

25R-330BKR-330BW1. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of the circuits.When handling these part

26R-330BKR-330BWTo remove the outer case, proceed as follows.1. Disconnect the power supply cord.2. Open the oven door and block it open.3. Remove the

27R-330BKR-330BWPOWER TRANSFORMER REMOVALRe-install1. Install the terminal insulator to receptacle of filamentlead (longer one) of power transformer.2

1R-330BKR-330BWWARNING TO SERVICE PERSONNELMicrowave ovens contain circuitry capable of pro-ducing very high voltage and current, contact withfollowin

28R-330BKR-330BWCONTROL PANEL ASSEMBLY REMOVALOVEN LAMP AND LAMP SOCKET REMOVAL1.Disconnect the power supply cord and remove outer case.2. Open the do

29R-330BKR-330BWCOOLING FAN MOTOR REMOVALREMOVAL1.Disconnect the power supply cord and remove outer case.2. Open the door and block it open.3. Dischar

30R-330BKR-330BWDOOR REPLACEMENTDOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT1. Disconnect the power supply cord, and t

31R-330BKR-330BW4. Pry the principles of the lever and lift up the choke coverby inserting a putty knife as shown Figure C-6.5. Release choke cover f

32R-330BKR-330BWSEALER FILMInstallation1. Put the adhesive tape on the backing film of the sealerfilm as shown in Fig. C-8.2. Tear the backing film by

33R-330BKR-330BW645123645123ABCDEFGHABCDEFGHFigure S-1. Pictorial DiagramHIGH VOLTAGECAPACITORH.V.RECTIFIERPOWER SUPPLY CORD 120V 60HzHIGH VOLTAGE

34R-330BKR-330BW645123645123ABCDEFGHABCDEFGHFigure S-2. Power Unit Circuit+–+–A 1A 2C 1C10C 2C 3C 4C 9C 5C 7SH-BSH-AC12C11T1AC120V60Hz MICROACACVALED

35R-330BKR-330BW645123645123ABCDEFGHABCDEFGHFigure S-3. CPU Unit CircuitSEG45P10SEG12SEG11SEG10SEG 9SEG 8SEG 7SEG 6SEG 5SEG 4SEG 3SEG 2SEG 1COM 1COM 2

36R-330BKR-330BW645123645123ABCDEFGHABCDEFGHFigure S-4. Printed Wiring Board of Power UnitWH - 1WH - 1SH - BSH - ALD1DIPLD21C3C4C5R3C2FC110D4D2D1D3D9(

37R-330BKR-330BW**∆**PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure.The parts marked “*” are used in voltage more than 250V.R

2R-330BKR-330BWMICROWAVE MEASUREMENT PROCEDUREA. Requirements:1) Microwave leakage limit (Power density limit): The power density of microwave radiati

38R-330BKR-330BWHOW TO ORDER REPLACEMENT PARTSTo have your order filled promptly and correctly, please furnish the following information.1. MODEL NUMB

39R-330BKR-330BW645123645123ABCDEFGHABCDEFGHOVEN AND CABINET PARTS7-57-57-87-87-57-72-14-17-24-167-67-36-27-37-61-11-11-24-81-74-47-57-54-37-56-17-11-

40R-330BKR-330BW645123645123ABCDEFGHABCDEFGHCONTROL PANEL PARTSDOOR PARTSMISCELLANEOUS5-25-75-15-35-6Actual wire harness may be different from illust

41R-330BKR-330BW645123645123ABCDEFGHABCDEFGHPACKING AND ACCESSORIESDOOR PROTECTION SHEETSPADPA204WRE0TOP PAD ASSEMBLYFPADBA341WRK0PLASTIC BAGSSAKHA

42R-330BKR-330BW'98 SHARP CORP. (2S2.530E) Printed in U.S.ACOPYRIGHT © 1997 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publication m

3R-330BKR-330BWSHARP ELECTRONICS CORPORATIONSHARP PLAZA, MAHWAH,NEW JERSEY 07430-2135SERVICE MANUALMICROWAVE OVENR-330BK / R-330BWFOREWORDThis Manual

4R-330BKR-330BWITEM DESCRIPTIONPower Requirements 120 Volts / 14 Amperes60 HertzSingle phase, 3 wire groundedPower Output 1100 watts (IEC-705 TEST PRO

5R-330BKR-330BWA short power-supply cord is provided to reduce risks of becomingentangled in or tripping over a longer cord.Where a two-pronged wall-

6R-330BKR-330BWOPERATIONDESCRIPTION OF OPERATING SEQUENCEThe following is a description of component functions duringoven operation.OFF CONDITIONClosi

7R-330BKR-330BWFigure O-1. Oven Schematic-Off ConditionSCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED2. CLOCK APPEARS ON DISPLAYenough steam from the