Sharp R-1480 Service Manual

R-1480R-1481R-1482In the interest of user-safety the oven should be restored to its originalcondition and only parts identical to those specified shou

8R-1480R-1481R-14822. HORIZONTAL VENTINGThe air handing is the same as VERTICAL VENTINGexcept that the final air discharge is directed horizontallyout

9R-1480R-1481R-1482SCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED2. COOKING TIME PROGRAMMED3. VARIABLE COOKING CONTROL "HIGH"4. "START&

10R-1480R-1481R-1482DESCRIPTION AND FUNCTION OF COMPONENTSDOOR OPEN MECHANISMThe door is opened by pulling the door handle, refer to theFigure D-1.CAU

11R-1480R-1481R-1482TROUBLESHOOTING GUIDENever touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected

12R-1480R-1481R-1482CK = Check / RE = ReplacePOSSIBLE CASE AND DEFECTIVE PARTSPROBLEMTEST PROCEDURECONDITIONOFFCONDITIONIDLECONDITIONMICROWAVECOOK

13R-1480R-1481R-1482B POWER TRANSFORMER TESTTEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer cas

14R-1480R-1481R-1482TEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and b

15R-1480R-1481R-1482TEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and b

16R-1480R-1481R-1482I BLOWN MONITOR FUSE TESTTEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer ca

17R-1480R-1481R-1482TEST PROCEDURESPROCEDURELETTERCOMPONENT TESTResistance between;BLU (1) AND YLW (4) = 0Ω (Shorted)BLK (2) AND YLW (4) = 32ΩBLU (1)

R-1480R-1481R-1482PRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVEENERGY(a) Do not operate or al

18R-1480R-1481R-1482TEST PROCEDURESPROCEDURELETTERCOMPONENT TEST7) Reconnect the power supply cord after the outer case is installed.8) Run the oven a

19R-1480R-1481R-1482TEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and b

20R-1480R-1481R-1482TEST PROCEDURESPROCEDURELETTERCOMPONENT TESTSTEPS OCCURRENCE CAUSE OR CORRECTION1 Only pattern at "a" is broken. *Insert

21R-1480R-1481R-1482TOUCH CONTROL PANEL ASSEMBLYOUTLINE OF TOUCH CONTROL PANEL3) Synchronizing Signal CircuitThe power source synchronizing signal is

22R-1480R-1481R-1482DESCRIPTION OF LSILSI(IZA876DR)The I/O signals of the LSI(IZA876DR) are detailed in the following table.Pin No. Signal I/O Descrip

23R-1480R-1481R-148222 P44 OUT Terminal not used.23 P43 OUTSignal to sound buzzer.A: key touch sound.B: Completion sound.C: When the temperature of th

24R-1480R-1481R-1482Pin No. Signal I/O Descriptionß(60Hz)GNDVP41-44 P17-P14 OUT Digit selection signal.Signal similar to P23.45-48 P13-P10 OUTSegment

25R-1480R-1481R-14821. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of thecircuits. When handling these

26R-1480R-1481R-1482Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts mayresult in se

27R-1480R-1481R-1482REMOVAL OF OVEN FROM WALL (Two persons recommended to remove the oven)1. Disconnect the power supply cord, and uncoil the powersup

1R-1480R-1481R-1482WARNING TO SERVICE PERSONNELMicrowave ovens contain circuitry capable of pro-ducing very high voltage and current, contact withfoll

28R-1480R-1481R-1482hood duct.10.Remove the two (2) unit mounting screws from thechassis support (right side) and the hood duct (left side).11.Remove

29R-1480R-1481R-14821. Disconnect the power supply cord, remove the ovenfrom wall and remove outer case (Refer to procedure of"Removal of Oven fr

30R-1480R-1481R-14821. Disconnect the power supply cord.2. Open the door and block it open.3. Remove the three (3) screws holding the base cover tothe

31R-1480R-1481R-1482the control panel.17.Remove the key fixing plate from the control panel.18.Tear the key unit from the key fixing plate.19.Now, the

32R-1480R-1481R-14821. Disconnect the power supply cord and remove the ovenfrom wall and remove outer case. (Refer to procedure of"Removal of Ove

33R-1480R-1481R-1482latch holes correctly.6. Re-install the door stopper to the door assembly.7. Re-install the hood exhaust louver to the oven cavity

34R-1480R-1481R-1482645123645123ABCDEFGHABCDEFGHFigure S-1. Pictorial DiagramHIGHVOLTAGERECTIFIERHIGH VOLTAGECAPACITORHIGH VOLTAGEWIRE AHIGH VOLTA

35R-1480R-1481R-1482645123645123ABCDEFGHABCDEFGHFigure S-2. Control Panel Circuit+–+–+–+–A 7VRS1(J1)D20R110R110 47 1/2wC110 0.033µ/250vC110D25D26D27D2

36R-1480R-1481R-1482645123645123ABCDEFGHABCDEFGHFigure S-3. Printed Wiring BoardDIP,BFB1R10C6C10R4R1D4(ZD2)S1 S2P(R2)D1SP40C5C7D25D20464847RY4RY5T1(47

37R-1480R-1481R-1482PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure.The parts marked “*” are used in voltage more than 250V. &

2R-1480R-1481R-1482MICROWAVE MEASUREMENT PROCEDUREA. Requirements:1) Microwave leakage limit (Power density limit): The power density of microwave rad

38R-1480R-1481R-1482REF. NO. PART NO. § DESCRIPTION Q'TY CODEIC1 RH-IZA876DRE0 J LSI 1 AWQ3 VSKRA101M//-3 J Transistor (KRA101M) 1 ABQ4 VSDTA123E

39R-1480R-1481R-1482REF. NO. PART NO. § DESCRIPTION Q'TY CODE5-2-1 PGLSPB012MRE0 M Front door glass [R-1480] 1 AQ5-2-1 PGLSPB014MRR0 M Front door

40R-1480R-1481R-1482645123645123ABCDEFGHABCDEFGHOVEN AND CABINET PARTS4-11-127-32-12-54-134-192-67-47-36-107-57-37-1 1-161-137-87-31-174-187-37-97-97-

41R-1480R-1481R-1482645123645123ABCDEFGHABCDEFGH6-66-76-116-15-65-45-34-2155-15-2-15-25-55-65-66-1-15-2-45-2-25-2-36-1-26-1-36-1-76-1-56-1-66-1-43-2-2

42R-1480R-1481R-1482645123645123ABCDEFGHABCDEFGHPACKING AND ACCESSORIES'98 SHARP CORP. (3S2.530E) Printed in U.S.ACOPYRIGHT © 1998 BY SHARP CORPO

3R-1480R-1481R-1482SHARP ELECTRONICS CORPORATIONSHARP PLAZA, MAHWAH,NEW JERSEY 07430-2135SERVICE MANUALOVER THE RANGEMICROWAVE OVENR-1480 / R-1481 / R

4R-1480R-1481R-1482ITEM DESCRIPTIONPower Requirements 120 Volts / 14.3 Amperes60 HertzSingle phase, 3 wire groundedPower Output 950 watts (IEC-705 TES

5R-1480R-1481R-1482Electrical RequirementsThe oven is equipped with a 3-prong grounding plug. DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THEGROUNDIN

6R-1480R-1481R-1482MIX CONV COOK LBS KGTURNTABLEOFF HELP CONTROL PANELOPERATIONDESCRIPTION OF OPERATING SEQUENCEThe following is a description of comp

7R-1480R-1481R-1482RELAY CONNECTED COMPONENTSRY1 Oven lamp / Fan motor / Stirrer motorRY2 Power transformerRY3 Turntable motorRY4 Hood fan motor2. 120