Daewoo KOC985T Service Manual

Service ManualMicrowave OvenModel: KOC-972T0SKOC-972T2SKOC-982T1SKOC-982T2SKOC-983T1SKOC-983T2SKOC-984T1SKOC-984T2SKOC-985T1SKOC-985T2SDAEWOO ELECTRON

DISASSEMBLY AND ASSEMBLYCautions to be observed when trouble shooting.Unlike many other appliances, the microwave oven is high-voltage, high-current e

DISASSEMBLY AND ASSEMBLY1. To remove cabinet(1) Remove four screws on cabinet back.(2) Push the cabinet backward.2. To remove guide wind assembly(1) R

DISASSEMBLY AND ASSEMBLY3. To remove H.V.transformer(1) Remove four screws which secure the H.V.transformer to the base plate.(2) Remove the H.V.trans

DISASSEMBLY AND ASSEMBLY5. To remove magnetron(1) Remove three screws which secure the magnetron.(2) Remove the magnetron.(3) Reverse the above steps

DISASSEMBLY AND ASSEMBLY6. To remove control panel assembly KOC-972T, KOC-982T(1) Remove a screw which secure the control panel assembly tothe oven fr

14KOC-983T(1) Remove a screw which secure the control panel assembly to the oven front plate. At the same time, draw forward the control panel assembl

DISASSEMBLY AND ASSEMBLYKOC-984T(1) Remove a screw which secure the control panel assembly to the oven front plate. At the same time, draw forward the

DISASSEMBLY AND ASSEMBLYKOC-985T(1) Remove a screw which secure the control panel assembly to the oven front plate. At the same time, draw forward the

DISASSEMBLY AND ASSEMBLY7. To remove door assembly (1) Remove two screws which secure the stopper hinge top.(2) Remove the door assembly from top plat

KOC-983T (1) Remove the gasket door.(2) Remove the door seal ass’y.(3) Remove the hook and spring.(4) Remove the barrier-screen *o. REF. NO. PART CODE

SAFETY AND PRECAUTIONS... 2SPECIFICATIONS...

19DISASSEMBLY AND ASSEMBLYKOC-984T, KOC-985T (1) Remove the gasket door.(2) Remove a screw holding the handle.(3) Remove the handle from the frame doo

DISASSEMBLY AND ASSEMBLY9. Method to reduce the gap between the door seal and the oven front surface.(1) To reduce gap located on part ‘A’ • Loosen t

DISASSEMBLY AND ASSEMBLY10. To remove motor syncro and under heater(1) Cut the syncro motor cover parts from the base plate.(2) Remove two screws whic

DISASSEMBLY AND ASSEMBLYKOC-982T,KOC-983T,KOC-984T,KOC-985T(1) Remove two screws which secure the cover insulator *t to top plate.(2) Remove the harne

INTERLOCK MECHANISM AND ADJUSTMENT The door lock mechanism is a device which has been specially designed to completely eliminate microwave radiation w

TROUBLE SHOOTING GUIDEFollowing the procedures below to check if the oven is defective or not.1. Check grounding before checking trouble.2. Be careful

TROUBLE SHOOTING GUIDE(TROUBLE 2) Grill heater (top heater) is not heated; Food will not become hot.CONDITIONCHECK RESULT CAUSE REMEDYOutlet has prop

TROUBLE SHOOTING GUIDE(TROUBLE 3) No microwave oscillation even though fan motor rotates.CONDITIONCHECK RESULTNoContinuityContinuityContinuity inback

TROUBLE SHOOTING GUIDE(TROUBLE 4) Display shows all figures selected, but oven does not start cooking, even though desired program and time are set a

TROUBLE SHOOTING GUIDE(TROUBLE 6) The following visual conditions indicate a probable defective touch control circuit or button P.C.B. assembly.1. In

SAFETY AND PRECAUTIONS1. FOR SAFE OPERATIONDamage that allows the microwave energy (that cooks or heats the food) to escape will result in poor cookin

TROUBLE SHOOTING GUIDEBUTTON KEYBOARD CHECK PROCEDURE1. Type of button names(key metrix and circuit diagram)The tact switch keyboard consists of 10 ke

MEASUREMENT AND TEST1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT Microwave output power can be checked by indirectly measuring the temperature rise of

MEASUREMENT AND TEST2. ELECTRICAL CONTINUITY CHECK OF INTERLOCK SWITCH PROCEDURE1. Primary interlock switch(1) Disconnect two connectors from primary

MEASUREMENT AND TEST3. MICROWAVE RADIATION TESTPROCEDURE1. Prepare Microwave Energy Survey Meter, 600cc glass beaker, and glass thermometer 100°C (212

MEASUREMENT AND TEST4. COMPONENT TEST PROCEDURE• High voltage is present at the high voltage terminal of the high voltage transformer during any cooki

WIRING DIAGRAM34

SCHEMATIC DIAGRAM35

SCHEMATIC DIAGRAM36

SCHEMATIC DIAGRAM37

EXPLODED VIEWS AND PARTS LIST1. KOC-972TEXPLODED VIEW

SPECIFICATIONSSPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.MODEL KOC-972T0S KOC-972T2SPOWER SUPPLY 230V~50Hz 230V~50Hz POWER CONSUMPTIONMICROW

PARTS LISTREF NO. PART CODE PART NAME DESCRIPTION QTY REMARKA00 3511708320 DOOR AS KOC-972T 1B00PKCPSWQ300 CONTROL-PANEL AS KOC-972T0S 1PKCPSWQ300 CON

F35 3513002900 HOLDER HEATEER BRASS C3604BD 1F36 7391800011 NUT HEX 6N-1-8 MFZN 1F37 3510603700 BRACKET HEATER *U STS301 TO.6 1F38 3510603600 BRACKET

EXPLODED VIEWS AND PARTS LIST2. KOC-982T/983T/984T/985TEXPLODED VIEW41

42PARTS LISTREF NO. PART CODE PART NAME DESCRIPTION QTY REMARKA00 3511708380 DOOR AS KOC-984T 13511708390 DOOR AS KOC-985T 13511710830 DOOR AS KOC-983

F33 7S422X4081 SCREW SPECIAL TT2 TRS 4*8 SE MFZN 1F34 3517502700 PROTECTOR HEATER MICA MT56 T1.O 2F35 3510603610 BRACKET HEATER *T SECC TO.6 2F36 7S31

PRINTED WIRING BOARD1. CIRCUIT CHECK PROCEDURE1. Low Voltage Transformer check• The low voltage transformer is located on the P.C.B.• Measuring condit

PRINTED WIRING BOARD3. Display Problems• The display trouble shooting dataNO CAUSE MEASUREMENT RESULT REMEDY1 Poor contact betweenP.C.B. and displayfi

PRINTED WIRING BOARD4. Case of no microwave oscillation(1) Situation : When touching M/W button, oven lamp turns on, fan motor and turntable motor rot

PRINTED WIRING BOARD• Check method5. Case of no heating of upper heaterWhen touching TEMP COOK & COMBI button, oven lamp turns on, fan motor and t

PRINTED WIRING BOARD7. Case of no stopping of the count down timerWhen the door is opened during operation, the count down timer does not stop. • Chec

EXTERNAL VIEW1. OUTER DIMENSIONKOC-972TKOC-982T/983T/984T/985T

49P.C.B. CIRCUIT DIAGRAM1. KOC-972T/982T

50KOC-972T/982T PCB ASS’Y PART LISTNAME SYMBOL SPECIFCATION PART CODE Q′TYPCBM212 93X197 3514314940 1M213 84X192 3514314950 1TRANS POWER LVT1 DMR-101F

P.C.B. CIRCUIT DIAGRAMKOC-983T/984T/985T

KOC-983T/984T/985T PCB ASS’Y PART LISTNAME SYMBOL SPECIFCATION PART CODE Q′′′′TYPCBM218 93X213 3514314980 1M219 91.5X163 3514314990 1 BUZZER BZ1 BM-20

EXTERNAL VIEW2. FEATURE DIAGRAMKOC-972T1. Door seal - Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage.

6 EXTERNAL VIEWKOC-982T/983T/984T/985T1. Door seal - Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage.2.

INSTALLATION1. Steady, flat locationThis microwave oven should be set on a steady, flat surface.This microwave oven is designed for counter top use on

CONTROL PANELall information manuallyput into the oven.Stop/Clear Button-Used to pause and clearmore than 1.3 sec, numberis scrolled up automatically.