Sharp R-208 Manuel de service

SERVICE MANUALSHARP ELECTRONICS CORPORATIONService Headquarters: Sharp Plaza, Mahwah, New Jersey 07430-2135R-22GVR-22

8R-22GVR-22GTR-23GTR-24GTSCHEMATICNOTE: CONDITION OF OVEN1. FOR 1MINUTE AFTER DOOR OPENED.2. " . " APPEARS ON DISPLAY.Figure O-2. R-23GT/2

9R-22GVR-22GTR-23GTR-24GTSCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED.2. SELECTATIME PAD TOUCHED.3. COOKING TIME PROGRAMMED.4. START PAD TOUCHED.Fig

10R-22GVR-22GTR-23GTR-24GTDOOR OPEN MECHANISM1. The door release lever is pulled.2. The upper latch head is lifted up by the linked doorrelease lever.

11R-22GVR-22GTR-23GTR-24GTOVEN LAMPSThe oven cavity light illuminates the interior of the oven sothat food being cooked can be examined visually throu

12R-22GVR-22GTR-23GTR-24GTHome fuse blows when power cord is pluggedinto wall receptacleMonitor fuse blows when power cord isplugged into wall recepta

13R-22GVR-22GTR-23GTR-24GTJ K K K L M N N N O CK CK CK CK CK RST RST CK CK

14R-22GVR-22GTR-23GTR-24GTTEST PROCEDURESHIGH VOLTAGES ARE PRESENT DURING THE COOK CYCLE, SO EXTREME CAUTION SHOULDBE OBSERVED.DISCHARGE THE HIGH VOLT

15R-22GVR-22GTR-23GTR-24GTPROCEDURELETTERCOMPONENT TESTTEST PROCEDURES (CONT'D)(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT

16R-22GVR-22GTR-23GTR-24GTTEST PROCEDURES (CONT'D)COMPONENT TESTPROCEDURELETTERSCREW DRIVERMONITOR SWITCH (2)OHMMETERMONITOR SWITCH (1)LATCH HOOK

17R-22GVR-22GTR-23GTR-24GTTEST PROCEDURES (CONT'D)PROCEDURELETTERCOMPONENT TESTWhen replacing thermal cut-out, check plastic contents around ther

R-22GVR-22GTR-23GTR-24GTPRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVEENERGY(a) Do not operate

18R-22GVR-22GTR-23GTR-24GTTEST PROCEDURES (CONT'D)PROCEDURELETTERCOMPONENT TESTM KEY UNIT TESTIf the display fails to clear when the STOP/CLEAR p

19R-22GVR-22GTR-23GTR-24GTTEST PROCEDURES (CONT'D)PROCEDURELETTERCOMPONENT TESTdamage and examine the transformer witha tester for the presence o

20R-22GVR-22GTR-23GTR-24GTformer.During heating, the primary current of the high voltagetransformers also flows through the primary winding of thecurr

21R-22GVR-22GTR-23GTR-24GT1 VCC IN Power source voltage: +5V.VC voltage of power source circuit input.2/3VEE/AVSS IN Connected to GND4 VREF IN Connect

22R-22GVR-22GTR-23GTR-24GT21 P45 OUT Digit selection signal.The relation between digit signal and digit are asfollows:Digit signal DigitP42 ...

23R-22GVR-22GTR-23GTR-24GTPin No. Signal I/O DescriptionX24C02P is a 2K-bit, serial memory, enabling CMOS to be erased/written electrically. This memo

24R-22GVR-22GTR-23GTR-24GTSERVICING3. Servicing of Touch Control PanelWe describe the procedures to permit servicing of thetouch control panel of the

25R-22GVR-22GTR-23GTR-24GT3) Practice for inputting total using times (Ex. 310000 times)... Flashing / ... 0.1sec BUZZERPAD DISPLAY INDICATOR TON

26R-22GVR-22GTR-23GTR-24GTOTHER SETTING AND CHECKING PROCEDURE1. EXPRESS DEFROSTT = STG1 + STG 2 + STG3STG = A x T + B1) To set the constants of Expre

27R-22GVR-22GTR-23GTR-24GTMEMORY READJUSTMENT PROCEDURE1. To set the standard voltage (for R-23GT / R-24GT)When the IC2 is changed in the control unit

1R-22GVR-22GTR-23GTR-24GTBEFORE SERVICINGBefore servicing an operative unit, perform a microwave emission check as per the MicrowaveMeasurement Proced

28R-22GVR-22GTR-23GTR-24GTCOMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURECAUTION: DISCONNECT OVEN FROM POWER SUPPLY BEFORE REMOVING OUTER CASE.DISCHARG

29R-22GVR-22GTR-23GTR-24GTand oven cavity.4. Disconnect all wire leads from the high voltage capacitor.5. Disconnect wire leads of high voltage rectif

30R-22GVR-22GTR-23GTR-24GTReplacement of individual component is as follows:CONTROL UNIT AND CONTROL PANEL FRAME(WITH KEY)7. Remove two (2) screws hol

31R-22GVR-22GTR-23GTR-24GTpictorial diagram. Be careful to ensure proper connectionof the wire leads.4. Make sure that the monitor switches (1), (2) a

32R-22GVR-22GTR-23GTR-24GTtight, moisture (condensation)-tight or light-tight.Therefore, occasional appearance of moisture, lightor sensing of gentle

33R-22GVR-22GTR-23GTR-24GT645123645123ABCDEFGHABCDEFGHFigure S-1. Pictorial Diagram (R-22GV, R-22GT)YLWORGBLKBLKGRYGRYWHTWHTREDCN-D123BLKBLKCN-H123B

34R-22GVR-22GTR-23GTR-24GT645123645123ABCDEFGHABCDEFGHFigure S-2. Pictorial Diagram (R-23GT, R-24GT)REDREDREDBLKWHTWHTCN-D123BLKBLKCN-H123BLKBLK123CN-

35R-22GVR-22GTR-23GTR-24GT645123645123ABCDEFGHABCDEFGHFigure S-3. Control Panel Circuit (R-22GV)+–+–+–+––++––+A3A5A7A1NCCOMNCCOMTB2TB1D1 D3 B1 B2 B3 H

36R-22GVR-22GTR-23GTR-24GT645123645123ABCDEFGHABCDEFGHFigure S-4. Control Panel Circuit (R-22GT)+–+–+–+––++––+A3A5A7A1NCCOMNCCOMTB2TB1D1 D3 B1 B2 B3 H

37R-22GVR-22GTR-23GTR-24GT645123645123ABCDEFGHABCDEFGHFigure S-5. Control Panel Circuit (R-23GT)+–+–+–+––++––+A3A5A7A1NCCOMNCCOMTB2TB1D1 D3 B1 B2 B3 H

2R-22GVR-22GTR-23GTR-24GTMICROWAVE MEASUREMENT PROCEDUREA. Requirements:1) Microwave leakage limit (Power density limit): The power density of microwa

38R-22GVR-22GTR-23GTR-24GT645123645123ABCDEFGHABCDEFGHFigure S-6. Control Panel Circuit (R-24GT)+–+–+–+––++––+A3A5A7A1NCCOMNCCOMTB2TB1D1 D3 B1 B2 B3 H

39R-22GVR-22GTR-23GTR-24GT645123645123ABCDEFGHABCDEFGHFigure S-7. Printed Wiring Board13Q20EBQ21EB-++C21C20-D20RY1D1D2D4D3(J2)CN-1TTMOLSM17POWERPOWER(

40R-22GVR-22GTR-23GTR-24GT◊Refer to "IMPORTANT" described at end of parts list.REF. NO. PART NO. DESCRIPTION Q'TY CODEPARTS LIST◊◊◊◊ELE

41R-22GVR-22GTR-23GTR-24GTREF. NO. PART NO. DESCRIPTION Q'TY CODEC60 VCKYD11HF104Z Capacitor 0.1 uF 50V 1 ABC61 VCKYD11CY103N Capacitor 0.01

42R-22GVR-22GTR-23GTR-24GTREF. NO. PART NO. DESCRIPTION Q'TY CODE4- 1 PFILWA055WRP0 Oven light screen (Outer) 14- 2 FDUC-A292WRY0 Exhaust duct as

43R-22GVR-22GTR-23GTR-24GTREF. NO. PART NO. DESCRIPTION Q'TY CODEIMPORTANT: ◊ CONTROL UNIT ASSEMBLY: SPECIAL INSTRUCTUIONSWhen defective compone

44R-22GVR-22GTR-23GTR-24GT645123645123ABCDEFGHABCDEFGHHOW TO ORDER REPLACEMENT PARTSTo have your order filled promptly and correctly, please furnish t

45R-22GVR-22GTR-23GTR-24GTOVEN AND CABINET PARTS645123645123ABCDEFGHABCDEFGHA1A2A1A22-52-5-12-61-152-71-184-2 1-141-131-24-184-34-244-374-114-214-214-

46R-22GVR-22GTR-23GTR-24GT'95 SHARP CORP. (7K3.050E) Printed in U.S.ATOP PAD ASSEMBLY FPADBA313WRK0 WRAP COVERDOOR PROTECTION SHEETSPADP033

3R-22GVR-22GTR-23GTR-24GTSERVICE MANUALCOMMERCIALMICROWAVE OVENR-22GV/ R-22GT/ R-23GT/ R-24GTFOREWORDThis Manual has been prepared to provide Sharp El

4R-22GVR-22GTR-23GTR-24GTSPECIFICATIONITEM DESCRIPTIONPower Requirements 120 Volts / 2.0 KW (R-22GV, R-22GT) Approx. 17.7A230/208 Volts / 2.5 kW (R-23

5R-22GVR-22GTR-23GTR-24GTVOLTAGE SELECTThe R-23GT and the R-24GT have been preset for 230V opera-tion.If you need to change this oven for 208V operati

6R-22GVR-22GTR-23GTR-24GTOPERATIONDESCRIPTION OF OPERATING SEQUENCEThe following is a description of component functions duringoven operation.OFF COND

7R-22GVR-22GTR-23GTR-24GTTWO MAGNETRON OPERATION SYSTEMTwo magnetrons (1), (2) are equipped in order to get highermicrowave power output. The primary