Daewoo KOG-875T Service Manual

Service ManualMicrowave OvenModel: KOG-875T2SDAEWOO ELECTRONICS CO., LTD.S/M No. : G875T2S001http : //svc.dwe.co.kr Feb. 2002

91. To remove cabinet. (Refer to Fig. 1)1) Remove three screws on cabinet back.2) Push the cabinet backward.2. To remove guide wind assembly. (Refer t

103. To remove H.V. transformer. (Refer to Fig. 3)1) Remove four screws 1 which secure the H.V. Transformer bracket to the base plate.2) Remove the H.

114. To remove magnetron. (Refer to Fig. 4)1) Remove a screw 2 which secure the magnetron 1.2) Remove the magnetron.3) Reverse the above steps for rea

125. To remove control panel assembly. (Refer to Fig. 5, 6)(1) Remove a screw holding control panel assembly to the ovenfront plate.At the same time,

136. To remove door assembly. (Refer to Fig. 7)1) Remove two screws 1 which secure to hinge.2) Remove door assembly 2.3) Remove door above for reassem

148. Method to reduce the gap between the door seal and the oven front surface.(1) To reduce gap located on part ‘A’.1) Remove the cabinet.2) Loosen a

159. To remove tray motor and under Heater. (Refer to Fig. 9)1) Cut the tray motor cover parts from the base plate (Refer to Fig. 9).2) Remove two scr

1610. To remove grill heater assembly. (Refer to Fig. 10)1) Remove the cabinet. 2) Release two screws 1 , and remove the Top cover 2.3) Release a scre

17(TROUBLE 1) Oven does not operate at all ; any inputs can not be accepted.TROUBLE SHOOTING GUIDE Condition Check Result Cause RemedyFuse blowsCheck

18(TROUBLE 2) Grill Heater (Top heater) does not heat (Food will not become hot).Condition Check Result Cause RemedyReplace Outlet hasproper voltag

1PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVE ENERGY(a) Do not operate or allow the oven to

19(TROUBLE 3) No microwave oscillation even though fan motor rotates.Condition Check Result CauseDefective highvoltage transformerRemedyNo microwav

20(TROUBLE 4) Display shows all figures selected, but oven does not start cooking, even though desired programand time are set and start pad is tap

2111. Incomplete segments,(A) Segments missing.(B) Partical segments missing.(C) Digit flickering other than normal fluorescent slight flickering.(D)

221. Type of encoding and button names.Fig. 11 Key Matrix and circuit diagramThe button keyboard consists of 12 keys whose configurations are describ

231. Microwave Output Power1-1. Standard MethodMicrowave output power can be checked by indirectlymeasuring the temperature rise of a certain amount o

242-2. JudgementThe value of resistance should be applied to the valuespecified below.3. Microwave Leakage Test3-1. Warning1) DO NOT place your hands

251. High voltage is present at the high voltage terminal of the high voltage transformer during any cook cycle.2. It is neither necessary nor advisab

26WIRING DIAGRAM

27SCHEMATIC DIAGRAM

28

2PROPER USE AND SERVICE PRECAUTIONS 1. For Safe OperationDamage that allows the microwave energy (that cooks or heats the food) to escape will result

29EXPLODED VIEWS AND PARTS LIST

30NO PART CODE PART NAME DESCRIPTION Q'TYA00 3511710030 DOOR AS KOG-875T0S 1B00 PKCPSWVG10 CONTROL PANEL AS KOG-875T2S 11 3516108660 CAVITY AS KO

31NO PART CODE PART NAME DESCRIPTION Q'TY41 3512515500 GUIDE AIR OUTLET SA1D T0.5 142 7S427W40A1 SCREW SPECIAL TT2 HEX FG 4X10 SE MFZN 243 35113A

32PRINTED WIRING BOARD1.CIRCUIT CHECK PROCEDURE1) Low voltage transformer (DMR-984FS) check.The low voltage transformer is located on the P.C.B.Measur

333) Display problemsThe display trouble shooting data.NO CAUSE1 Poor contact between P.C.B.and display filament.2 The display has some troublein its

344) When there is no microwave oscillation.(1) When touching “M/W” button, oven lamp turns on. Fan motor and turntable motor rotate and cook indicato

35CHECK METHOD5) When there is not heater.When touching “TEMP COOK & COMBI” button, oven lamp turns on.Fan motor and turntable motor rotate and c

367) When “ ” comes on display.CHECK METHODif clock does not keep exact time, you must check. Diode 1, transistor Q2.POINT WAVEFORMABCT: 20ms (60 Hz)6

37P.C.B CURCUIT DIAGRAMDP12023212217191816156,8,9,1110144,7512556131573940141516181924232221172025264142436147234553525150452863303144343364293262BRO

38MAIN P.C.B. ASS’Y PART LISTNO. NAME SYMBOL SPECIFICATION PART CODE Q’TY1 PCB MAIN M218 93X213 3514314980 1M219 91.5X163 3514314990 12 BUZZER BZ1 BM-

3POWER SUPPLY 230V ~ , 50Hz single phase with earthingPOWER CONSUMPTION 1,400 W MICROWAVE OUTPUT POWER 900 W (IEC 705) FREQUENCY 2,450 MHZ GRILL POW

S/M NO. : G875T2S001DAEWOO ELECTRONICS CO., LTD.686, AHYEON-DONG MAPO-GU SEOUL, KOREAC.P.O. BOX 8003 SEOUL, KOREATELEX: DWELEC K28177-8CABLE: “DAEWOO

4NAMES AND FUNCTION OF PARTS971 2 6 3 4 58M/WPROGRAMKGCOOKGRILL COMBI WEIGHT-TIMEDEFROSTM/WWEIGHTDEFROSTTIMEDEFROSTGRILL COMBI+1MINPROGRAM COOK1. Roa

5CONTROL PANELM/WPROGRAMKGCOOKGRILL COMBI WEIGHT-TIMEDEFROSTM/WWEIGHTDEFROSTTIMEDEFROSTGRILL COMBI+1MINPROGRAM COOK1. Roast Beef2. Roast Pork3. Roast

6The door lock mechanism is a device which has been specially designed to completely eliminate microwave radiation whenthe door is opened during opera

7(2) Monitor interlock switch When the door is closed, the hook pushes the lever forward, and pushes the Latch Lever downward the lever press thebutto

8PRECAUTIONS FOR DISASSEMBLY AND REPAIR-Cautions to be observed when trouble shooting.Unlike many other appliances, the microwave oven is high-voltage