Sharp R-21AT Manuale di Servizio

R-21ATSHARP CORPORATION SERVICE MANUALSX802R21ATPKKCOMMERCIALMICROWAVE OVENMODEL R-21ATIn interests of user-safety the oven should be restored to its

8R-21ATInitial temperature ... T1 = 11°CTemperature aft

R-21AT9TEST PROCEDURESPROCEDURELETTER COMPONENT TESTE SWITCH TESTCARRY OUT 3D CHECKS.Isolate the switch to be tested and using an ohmmeter check betwe

10R-21ATCARRY OUT 3D CHECKS.Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the twoterminals as described in the

R-21AT11TEST PROCEDURESPROCEDURELETTER COMPONENT TESTe) Wrong figure appears.f) A certain group of indicators do not light up.g) The figure of all dig

12R-21ATTEST PROCEDURESPROCEDURELETTER COMPONENT TESTTo protect the electronic circuits, this model is provided with a fine foil pattern added to the

R-21AT1311) Relay Driving CircuitThis is a circuit for driving output relay by IC1 output.12) Door Sensing Switch CircuitThis is a circuit for driving

14R-21AT7-8 AN5-AN4 IN Terminal to change functions according to the model.Signal in accordance with the model in operation is applied to set up its f

R-21AT1527 RESET IN Auto clear terminal.Signal is input to reset the LSI to the initial state when power is supplied. Temporarilyset to "L"

16R-21ATWhen the memory IC (IC2) or control unit is exchanged, input the relay timing to the memory IC (IC2), referring to the"How to input the r

R-21AT17approx. 1M ohmECBICKIA7805P1321TransistorDTA123ESDTB143ESDTC143ESDTD143ESTOUCH CONTROL PANEL SERVICINGtransformer.4) Re-install the outer case

R-21ATSERVICING WARNING TO SERVICE PERSONNELMicrowave ovens contain circuitry capable of producing very high voltage and current. Contact with followi

18R-21AT3) Practice for inputting total using times (Ex. 310000times)... Flashing / ... 0.1sec BUZZERPAD DISPLAY INDICATOR PHONE(Door close) ..CH

R-21AT192) To check the constants of Express defrost." " : Flicker / : 0.1 sec BUZZERPAD DISPLAY INDICATOR PHONE.CHECK . "No.&quo

20R-21ATHIGH VOLTAGE CAPACITOR, HIGH VOLTAGE FUSE ANDHIGH VOLTAGE RECTIFIER ASSEMBLY REMOVALTo remove the components, proceed as follows.1. CARRY OUT

R-21AT213. Remove the one (1) screw holding the air guide to themagnetron and remove the air guide.4. Remove the one (1) screw holding the chassis sup

22R-21ATPower Supply CordChassis SupportWHTREDLNScrewGreen/YelowWireNoise FilterBule WireOven CavityBack PlateBrown WirePowerSupply CordMouldingC

R-21AT231. CARRY OUT 3D CHECKS.2. Remove the control panel assembly referring to "CON-TROL PANEL ASSEMBLY REMOVAL".3. Disconnect the leads f

24R-21ATUpper OvenHingeUpper OvenHingeLower OvenHingeLower OvenHingePinPinChoke CoverDoorPanel5. Release choke cover from door panel.6. Now c

R-21AT251. Disconnect the oven from the power supply.2. Open the oven door and wedge it open.3. Make sure that the smooth surface of the ceramic shelf

26R-21ATSCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED.2. "SELECT TIME" PAD TOUCHED.3. COOKING TIME ENTERED.4. START PAD TOUCHED.Figure O-2

R-21AT27645123645123ABCDEFGHABCDEFGHFigure S-1. Pictrorial DiagramTHERMAL CUT-OUT125˚C(OVEN)THERMALCUT-OUT145°C(MAG.)FAN MOTORWHTYLWWHTBLKHIGH VOLT

R-21AT1SERVICE MANUALCOMMERCIALMICROWAVE OVEN R-21ATGENERAL IMPORTANT INFORMATIONThis Manual has been prepared to provide Sharp Corp. Serviceengineer

28R-21AT645123645123ABCDEFGHABCDEFGHFigure S-2. Control Panel Circuit+++–+–––+–+–+–+–+–A 3AC230-240V50HzOVEN LAMPANTENNAMOTORFAN MOTORTARNTABLEM

R-21AT29645123645123ABCDEFGHABCDEFGHFigure S-3. Printed Wiring Board113FR30R83(C83)R82(C82)R81(C81)R80R58R57R56R55R54R53R52R51R50(R91)(R90)(R89)(R69)(

R-21AT30PARTS LISTNote: The parts marked "∆" may cause undue microwave exposure.The parts marked "*" are used in voltage more than

R-21AT31∆∆∆∆∆∆∆∆∆Note: The parts marked "∆" may cause undue microwave exposure.The parts marked "*" are used in voltage more than

R-21AT32HOW TO ORDER REPLACEMENT PARTSTo have your order filled prompty and correctly, please furnish the following information.1. MODEL NUMBER 2. REF

R-21AT33645123645123ABCDEFGHABCDEFGHOVEN AND CABINET PARTS7-37-37-121-134-196-27-74-207-47-17-17-41-111-154-34-44-51-31-31-54-291-167-54-167-37-11

R-21AT34645123645123ABCDEFGHABCDEFGHDOOR PARTSCONTROL PANEL PARTS3-2-26-53-2-33-2-13-23-13-33-33-33-3Actual wire harness may be different from illustr

2R-21ATGENERAL INFORMATIONWARNINGTHIS APPLIANCE MUST BE EARTHEDIMPORTANTTHE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING COD

R-21AT3APPEARANCE VIEW1. Digital Readout2. DOUBLE QUANTITY pad3. EXPRESS DEFROST pad4. Number pads for time and memory program-ming5. SELECT TIME pad6

4R-21ATOPERATION SEQUENCEOFF CONDITIONClosing the door activates the 1st. latch switch, 2nd. latchswitch and stop switch.IMPORTANT:When the oven door

R-21AT5DOOR OPEN MECHANISMThe door is opened by grasping the door handle, refer toFigure D-1.When the door handle is grasped, the handle lever ispulle

6R-21ATTROUBLESHOOTING GUIDEWhen troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks.Many o

R-21AT7A MAGNETRON TESTTEST PROCEDURESPROCEDURELETTER COMPONENT TESTCARRY OUT 3D CHECKS.Isolate the magnetron from high voltage circuit by removing al