microwave oven model kor 131g kor-131h kor-130asvc.daewoo.com.mx/bbs/manual/kor-131g-h.pdf ·...

S

S/M No. : R131GH0A01

ervice Manual

Model : KOR-131G

Microwave Oven

Mar. 2000

KOR-131HKOR-130A

2

TABLE OF CONTENTS

SAFETY AND PRECAUTIONS ................................................................................................. 3FOR SAFE OPERATION............................................................................................................................... 3

FOR SAFE SERVICE PROCEDURES .......................................................................................................... 3

SPECIFICATIONS....................................................................................................................... 4EXTERNAL VIEW ...................................................................................................................... 5

OUTER DIMENSION .................................................................................................................................... 5

FEATURE DIAGRAM ................................................................................................................................... 6

CONTROL PANEL ........................................................................................................................................ 7

INSTALLATION.......................................................................................................................... 10OPERATIONS AND FUNCTIONS............................................................................................ 11DISASSEMBLY AND ASSEMBLY ........................................................................................... 12INTERLOCK MECHANISM AND ADJUSTMENT ............................................................... 19TROUBLE SHOOTING GUIDE ................................................................................................ 20MEASUREMENT AND TEST.................................................................................................... 24

MEASUREMENT OF THE MICROWAVE POWER OUTPUT.................................................................. 24

MICROWAVE RADIATION TEST .............................................................................................................. 25

COMPONENT TEST PROCEDURE............................................................................................................. 26

WIRING DIAGRAM.................................................................................................................... 27PRINTED CIRCUIT BOARD..................................................................................................... 28

CIRCUIT CHECK PROCEDURE.................................................................................................................. 28

P.C.B. CIRCUIT DIAGRAM ......................................................................................................................... 31

P.C.B. LOCATION NO .................................................................................................................................. 32

EXPLODED VIEW AND PARTS LIST .................................................................................... 33DOOR ASSEMBLY ....................................................................................................................................... 33

CONTROL PANEL ASSEMBLY .................................................................................................................. 33

TOTAL ASSEMBLY...................................................................................................................................... 33

(a) Do not operate or allow the oven to be operated with the door open. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave

source, and make repairs as necessary: (1) Interlock operation, (2) Proper door closing, (3) Seal and sealing surfaces (arcing, wear, and other damage), (4) Damage to or loosening of hinges and latches, (5) Evidence of dropping or abuse.

(c) Before turning on power to the microwave oven for any service test or inspection within the microwave generating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.

(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is released to the owner.

(e) A microwave leakage check to verify compliance with the Federal performance standard should be performed on each oven prior to release to the owner.

PRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVE ENERGY

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CHECK RESULT CAUSE REMEDY

Fuse blows.Continuity

No Continuity

Continuity

0 infiniteΩ or

Approx. 150~310(normal)

ReplaceNOTE 1

ReplaceNOTE 1

Replace

Replace

Check continuity ofprimary winding of low

voltage transformer

Malfunctionof interlock

monitorswitch

Defective lowvoltage

transformer

Check continuity ofinterlock monitor switchwith door closed

Replace fuse

Check continuity of primaryinterlock switch contactwith door partially openuntil interlock monitor switchcontact close

Shorted contactsof primaryinterlock switch.

Fuse againblows

Disconnect one side of thelead wire connected formhigh voltage transformerto the high voltage capacitorand operate the unit

Normal Defective highvoltage capacitor

Defective highvoltage transformer

Replace

CONDITION

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Outlet has proper voltageFuse does not

blow.

Check continuity of magnetron

NoContinuity

Defectivemagnetron

Replace

Display do notshown countdown

NoContinuity

Normal Defective touchcontrol circuit

Open powersupply cord

Malfunction ofsecondary

interlock switch

ReplaceCheck continuity ofpower supply cord

Replace

Replace

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Turn table motor, and

oven lamp donot turn on

NoContinuity

Check continuity ofprimary interlock switch

Check continuity ofsecondary interlock switch

Check D.C. voltagebeing supplied toRELAY (RY2) coil

Malfunctionof primary

interlock switch

Malfunctionof secondary

interlock switch

Defectivetouch control

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Adjust orReplace

Replace

Replace

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NoContinuity

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CAUSE

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Defectivemagnetron

Defectivehigh voltagetransformer

Defectivehigh voltagetransformer

Defectivetouch control

circuit

Faultycontacts of

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relay coil

REMEDY

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Replace

Replace

Replace

Replace

Replace

Replace

Replace

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megger

Check continuity of highvoltage capacitor

terminals with wiresremoved

Connect megger leads tomagnetron terminal and

magnetron body

Check resistance ofprimary and secondary

coil of high voltagetransformer

Check continuity ofmagnetron with wires

removed

Check continuity offilament terminal of high

voltage transformer

Check D.C. voltagebeing supplied toRELAY (RY1) coil

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4 Caution: In this Service Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need thelatest parts information, please refer to PPL(Parts Price List) in Service information Center(http://svc.dwe.co.kr)