Sharp R-480J Service Manual

R-480JTABLE OF CONTENTSPageCAUTION, MICROWAVE RADIATION ...

R-480J8CK = Check / RE = ReplaceHome fuse blows when power supply cord is plugged into wall outlet.FUSE F10A blows when power supply cord is plugged i

R-480J9TEST PROCEDURESPROCEDURELETTERCOMPONENT TESTA MAGNETRON TESTNEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOLWHILE THE OV

R-480J10D HIGH VOLTAGE CAPACITOR TESTTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTRoom temperature ... To = 21˚C Initial temperature ...

R-480J11TEST PROCEDURESPROCEDURELETTERCOMPONENT TESTB. Continuity check must be carried out with measuring instrument which is set to the highest resi

R-480J12K TOUCH CONTROL PANEL ASSEMBLY TESTTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTH MOTOR WINDING TESTCARRY OUT 3D CHECKS.Disconnect the leads fr

R-480J13TEST PROCEDURESPROCEDURELETTERCOMPONENT TESTb) At a certain digit, brightness is low.c) Only one indicator does not light.d) The corresponding

R-480J14TEST PROCEDURESPROCEDURELETTERCOMPONENT TESTChecking the initial sensor cooking conditionWARNING : The oven should be fully assembled before f

R-480J15TEST PROCEDURESPROCEDURELETTERCOMPONENT TESTTESTING METHOD FOR AH SENSOR AND/OR CONTROL UNITTo determine if the sensor is defective, the simpl

R-480J16TOUCH CONTROL PANEL ASSEMBLYOUTLINE OF TOUCH CONTROL PANELThe touch control section consists of the following units.(1) Key Unit(2) Control Un

R-480J17LSIThe I/O signal of the LSI is detailed in the following table.Pin No. Signal I/O Description1 COM5 OUT Common data signal : COM11. Connected

R-480J

R-480J1837 P05 OUTKey strobe signal.Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17terminal while one of G

R-480J19Pin No. Signal I/O Description63-66 AIN3-AIN0 INTerminal to change cooking input according to the Model.By using the A/D converter contained i

R-480J20SW1SW2SW3SW4SW5P20P21P22P23P24 LSI(IC1)AIN4AIN5620k300k150k75k37.4k2623225049242515k15k4.7k123487650.01uF0.1uF0.01uFVA : -15VVA : -15VR90330C9

R-480J211. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of thecircuits. When handling these parts, the f

R-480J22COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDUREWARNING:Avoid possible exposure to microwave energy. Please follow the instructions below before

R-480J23Removal1. CARRY OUT 3D CHECKS.2. Disconnect wire leads from magnetron.3. Remove the two (2) screws holding the magnetron airduct to magnetron.

R-480J24OVEN LAMP AND LAMP SOCKET REMOVAL1. CARRY OUT 3D CHECKS.2. Remove one (1) screw holding the chassis support tothe magnetron and magnetron air

R-480J252. Install the fan motor to the back plate of the oven cavitywith the two (2) screws.3. Re-install the fan duct to the oven cavity.4. Connect

R-480J26toward the oven face. Then check lower portion of thelatch hook, pushing and pulling lower portion of thedoor toward the oven face. Both resul

R-480J27door panel upward.5. Hold the door panel to the door frame with three (3)screws.6. Re-install the latch spring to the latch head. Re-installth

R-480J1SERVICE MANUALMICROWAVE OVENR-480JGENERAL IMPORTANT INFORMATIONThis Manual has been prepared to provide Sharp Corp. Serviceengineers with Opera

R-480J28MICROWAVE MEASUREMENTAfter adjustment of door latch switches, monitor switchand door are completed individually or collectively, thefollowing

R-480J29SCHEMATICNOTE: CONDITION OF OVEN1.DOOR CLOSED.2.CLOCK APPEARS ON DISPLAY.NOTE: " " indicates components with potentials above 250V.F

R-480J30Figure S-1. Pictorial Diagram1ABCDEFGHABCDEFGH23456123456COM.MONITORSWITCHCOM.N.O.N.C.2ND. INTERLOCKRELAY CONTROLSWITCH1ST. LATCHSWITCHTURNTAB

R-480J31Figure S-2. Power unitl Circuit1ABCDEFGHABCDEFGH23456123456+–+–+–A 1B 2 B 1CN-AR4 27D5T1abcdVRS1(J1)D7D81SS270A1SS270A10G471KC1 0.1µ/50vC3 0.1

R-480J32Figure S3. CPU. Unit Circuit1ABCDEFGHABCDEFGH23456123456SENSOR DEFROST TURNTABLE OFF COOKHELPC11+-0.1uF/50V(J17) (J16)(J15) (J14)(J13)(J12)(J1

R-480J331ABCDEFGHABCDEFGH23456123456Figure S-4. Printed Wiring BoardWH - 1SH - BSH - A1C3C4C5R3C2FC110D4D2D1D3D9(D10)RY3(CN - D)D8ZD1VRBDUR2R1 R6 R5SP

R-480J34∆∆PARTS LISTNote: The parts marked "∆" may cause undue microwave exposure.The parts marked "*" are used in voltage more th

R-480J35HOW TO ORDER REPLACEMENT PARTSTo have your order filled prompty and correctly, please furnish the following information.1. MODEL NUMBER2. REF.

R-480J361ABCDEFGHABCDEFGH23456123456OVEN AND CABINET PARTS7-87-87-87-82-16-71-54-54-207-14-117-17-47-14-67-61-157-24-91-137-54-14-71-94-41-31-41-31-14

R-480J371ABCDEFGHABCDEFGH23456123456CONTROL PANEL PARTSDOOR PARTSActual wire harness may be different from illustration.6-24-185-45-85-85-55-65-15-75-

R-480J2PRODUCT SPECIFICATIONSITEM DESCRIPTIONPower Requirements 230 - 240 Volts50 HertzSingle phase, 3 wire earthedPower Consumption 1.65 kWPower Outp

R-480J'04SHARP CORP. (08S0.CD_E)COPYRIGHT © 2004 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publication may be reproduced, stored in

R-480J3APPEARANCE VIEW1. Ventilation openings2. Oven lamp3. Door hinges4. Door safety latches5. See through door6. Door seals and sealingsurfaces7. Co

R-480J4OPERATION SEQUENCEbecause the relay (RY1) stays closed. Shown in thedisplay is the remaining time.6. MONITOR SWITCH CIRCUITThe monitor switch i

R-480J52. Heat potatoes. Moisture and humidity is emitted rapidly.You can smell the aroma as it cooks.3. Sensor detects moisture and humidity and calc

R-480J6Figure D-1. Door Open Mechanism1ST. LATCH SWITCH AND 2ND. INTERLOCK RE-LAY CONTROL SWITCH1. When the oven door is closed, the contacts (COM-NO)

R-480J7SERVICINGMicrowave ovens contain circuitry capable of pro-ducing very high voltage and current, contact withany part of the high voltage circui