Sharp R-305HK Service Manual

R-305HKR-305HWIn the interest of user-safety the oven should be restored to its originalcondition and only parts identical to those specified should b

8R-305HKR-305HWDESCRIPTION AND FUNCTION OF COMPONENTSDOOR OPEN MECHANISMThe door is opened by pushing the open button on thecontrol panel, refer to th

9R-305HKR-305HWTROUBLESHOOTING GUIDENever touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected.When

10R-305HKR-305HWA MAGNETRON ASSEMBLY TESTHome fuse or circuit breaker blowswhen power cord is plugged into wallreceptacleC/T fuse blows when power cor

11R-305HKR-305HWB POWER TRANSFORMER TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Discharg

12R-305HKR-305HWTEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block

13R-305HKR-305HWTEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block

14R-305HKR-305HWTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTespecially the cooling fa air guide.CAUTION: IF THE C/T FUSE INDICATES AN OPEN CIRCUIT AT

15R-305HKR-305HW2) Open the door and block it open.3) Discharge high voltage capacitor.4) Reconnect all leads removed from components during testing.5

16R-305HKR-305HWWARNING : The oven should be fully assembled before following procedure.(1) Place one cup of water in the center of the turntable tray

17R-305HKR-305HWTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTSTEPS OCCURRENCE CAUSE OR CORRECTIONThe rated AC voltage is not present between1 the norma

R-305HKR-305HWPRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVEENERGY(a) Do not operate or allow

18R-305HKR-305HWDESCRIPTION OF LSILSIThe I/O signal of the LSI is detailed in the following table.Pin No. Signal I/O Description1 P50 IN Signal coming

19R-305HKR-305HW41 P70 OUT Oven lamp, fan motor and turntable motor driving signalTo turn on and off shut off relay (RY1). Thesquare waveform voltage

20R-305HKR-305HW1. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of the circuits.When handling these part

21R-305HKR-305HWPRECAUTIONS FOR USING LEAD-FREE SOLDER1. Employing lead-free solderThe "Main PWB" of this model employs lead-free solder. Th

22R-305HKR-305HWTo 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

23R-305HKR-305HWRemoval1. Disconnect the power supply cord and then removeouter case.2. Open the door and block it open.3. Discharge high voltage capa

24R-305HKR-305HW1. Disconnect the power supply cord, and then removeouter case.2. Open the door and block it open.3. Discharge high voltage capacitor.

25R-305HKR-305HWSide ViewRear View1. Disconnect the power supply cord.2. Remove turntable and turntable support from ovencavity.3. Lay the oven on it&

26R-305HKR-305HWhook, pushing and pulling upper portion of door towardthe oven face. Then check lower portion of the latchhook, pushing and pulling lo

27R-305HKR-305HWSealer filmBacking filmAdhesive tape14.Now, latch head and latch spring are free.15.Remove door screen from door frame.16.Now, door sc

1R-305HKR-305HWWARNING TO SERVICE PERSONNELMicrowave ovens contain circuitry capable of pro-ducing very high voltage and current, contact withfollowin

28R-305HKR-305HW645123645123ABCDEFGHABCDEFGHFigure S-1. Pictorial DiagramHIGH VOLTAGECAPACITORH.V. RECTIFIERPOWER SUPPLY CORD 120V 60HzHIGH VOLTAGE CO

29R-305HKR-305HWFigure S-2. Control Unit Circuit645123645123ABCDEFGHABCDEFGHSEG14AIN1AIN0SEG0P20VLC2VLC1VLC0CAPLCAPHP70AI N5P03COM0IC-1AI N2AI N3AI N4

30R-305HKR-305HWFigure S-3. Printed Wiring Board of Power Unit645123645123ABCDEFGHABCDEFGH

31R-305HKR-305HW∆∆∆∆∆******∆*∆*∆∆PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure.The parts marked “*” are used in voltage more

32R-305HKR-305HWPACKING AND ACCESSORIESDOOR PROTECTION SHEETSPADPA204WRE0TOP PAD ASSEMBLYFPADBA515WRKZPLASTIC BAGSSAKHA034WRE0Not replaceable items.PA

33R-305HKR-305HW645123645123ABCDEFGHABCDEFGHOVEN AND CABINET PARTSAA7-107-14-14-54-44-136-57-34-34-92-11-77-31-101-94-107-107-107-84-117-54-177-47-101

34R-305HKR-305HW2003 SHARP CORP. (2S1.700E) Printed in U.S.ADOOR PARTSCONTROL PANEL PARTSMISCELLANEOUS3-23-13-63-53-43-3Actual wire harness may be di

2R-305HKR-305HWMICROWAVE MEASUREMENT PROCEDUREA. Requirements:1) Microwave leakage limit (Power density limit): The power density of microwave radiati

3R-305HKR-305HWSHARP ELECTRONICS CORPORATIONSHARP PLAZA, MAHWAH,NEW JERSEY 07430-2135SERVICE MANUALMICROWAVE OVENR-305HK/ R-305HWFOREWORDThis Manual h

4R-305HKR-305HWITEM DESCRIPTIONPower Requirements 120 Volts / 13.5 Amperes60 HertzSingle phase, 3 wire groundedPower Output 1100 watts (IEC TEST PROCE

5R-305HKR-305HWcontact a qualified electrician and have it replaced with a properlygrounded three-pronged wall receptacle or have a grounding adapterp

6R-305HKR-305HWOPERATIONDESCRIPTION OF OPERATING SEQUENCEThe following is a description of component functions duringoven operation.OFF CONDITIONClosi

7R-305HKR-305HWFigure O-1. Oven Schematic-Off ConditionSCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED2. CLOCK APPEARS ON DISPLAYSCHEMATICNOTE: CONDITI