Sharp service manual Model R-21JCA-F

Page 1

R-21JCA-F

SERVICE MANUAL

1000W/ R-21JCA

C O M

 

 

M E R

 

 

C I A L

M I C R

 

 

O W A

O

 

V E

 

 

V E N

TIME GUIDE

 

 

FOR ONE SERVING

15 - 30 sec.

30 - 60 sec.

Bagel, Roll

Hot Dog

Muffin,

Pastry

Pizza Slice

Pie Slice

Small Sandwich

1 - 2 min.

2 - 3 min.

Beverage, Soup

Casserole, Stew

Large

Sandwich

 

Chili, Chowder

Popcorn, 1.5 oz.

Popcorn, 3.5 oz.

30

40 50

1

 

1.5

 

 

 

 

D

E

F

G

 

 

 

20

C

 

 

 

H

 

 

 

B

 

 

 

 

 

I

 

2

10 A

 

 

 

 

 

 

J

0

 

 

 

 

 

 

 

K

2.5

 

 

 

 

 

 

 

 

L

 

 

 

 

 

 

 

 

M

 

 

 

 

 

 

 

 

N

 

 

 

T

 

 

 

O

 

3

 

6

 

S

R

Q

P

 

 

 

 

 

 

5

 

4

 

 

 

 

 

 

 

 

 

 

 

 

INSTRUCTIONS

 

 

 

With the door

 

 

 

 

 

 

 

 

 

closed,turn the

timer to

the desired time.

 

 

 

 

 

 

 

Oven will begin

 

operating immediately.

 

 

 

 

To shut oven off

manually,return timer

to "0".

 

 

 

S0514R21JCPAF

LIGHT DUTY

COMMERCIAL

MICROWAVE OVENS

MODEL R-21JCA-F

In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used.

WARNING TO SERVICE PERSONNEL: Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock. (High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..)

TABLE OF CONTENTS

 

 

Page

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO

 

AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

INSIDE FRONT COVER

BEFORE SERVICING

INSIDE FRONT COVER

WARNING TO SERVICE PERSONNEL

1

MICROWAVE MEASUREMENT PROCEDURE

2

FOREWORD AND WARNING

3

PRODUCT SPECIFICATIONS

4

GENERAL INFORMATION

4

OPERATION

6

TROUBLESHOOTING GUIDE

9

TEST PROCEDURE

10

TOUCH CONTROL PANEL

16

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

20

PICTORIAL DIAGRAM

27

CONTROL PANEL CIRCUIT

28

PRINTED WIRING BOARD

29

PARTS LIST

30

PACKING AND ACCESSORIES

34

SHARP CORPORATION

This document has been published to be used for after sales service only.

The contents are subject to change without notice.

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Contents Model R-21JCA-F Before Servicing Dont Touch Before Servicing When the testing is completedRequirements Microwave Measurement ProcedureLeakage test Sharp Electronics Corporation Light Duty Commercial Microwave Oven 21JCA-F ForewordGeneral Information SpecificationMaximum width, depth and height Actual capacity for holding food is less10 6 Oven DiagramDescription of Operating Sequence OperationOFF Condition Cooking ConditionFM AM Figure O-1 Oven Schematic-OFF ConditionDescription and Function of Components Test Procedure Possible Case Defective Parts Troubleshooting GuideProblem Power Transformer Test Microwave Output PowerThermal CUT-OUT Test 125˚C Oven High Voltage Capacitor TestThermal CUT-OUT Test 145˚C Magnetron Monitor Switch Test Door Sensing SwitchPrimary Interlock System Test Primary Interlock Relay RY1Before testing Control Panel Assembly TestNoise Filter Test Relay Test Test Procedures Letter Component TestSteps Occurrence Cause or Correction Description of LSI Touch Control Panel AssemblyPower source voltage Pin No Signal Description Auto clear terminalInternal clock oscillation frequency input setting Power source voltage +5VTouch Control Panel Servicing Other PrecautionsServicing of Touch Control Panel Servicing ToolsUsing lead-free wire solder Precautions for Using LEAD-FREE SolderEmploying lead-free solder SolderingPower Transformer Removal Component Replacement and Adjustment ProcedureOuter Case Removal Magnetron Removal Control Panel Assembly RemovalOven Lamp and Lamp Socket Removal Antenna Motor Removal Positive Lock Connector NO-CASE Type RemovalCooling FAN Motor Removal Rear ViewRe-install Power Supply Cord ReplacementRemoval Door Parts Removal After any service, make sure of the following Antenna Motor Shaft ReplacementRemoval Figure C-10. Stirrer Antenna Assembly Installation Installation of Ceramic ShelfHighvoltagecomponents PictorialDiagramCN-A3 Pin5mm Pitch Figure S-3. Printed Wiring Board Electric Parts Parts ListCabinet Parts Control Panel PartsDoor Parts HOW to Order Replacement PartsMiscellaneous SCREWS,NUTS and WashersOven and Cabinet Parts Control Panel Parts Copyright 2005 by Sharp Corporation ALL Rights Reserved Packing and Accessories