S/M No. : G37DP0S001 Service Manual Microwave Oven Model : KOG-37DP0S KOG-37FP0S DAEWOO ELECTRONICS CO., LTD.
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY (a) Do not operate or allow the oven to be operated with the door open.
SAFETY AND PRECAUTIONS 1.FOR SAFE OPERATION Damage that allows the microwave energy (that cooks or heats the food) to escape will result in poor cooking and may cause serious bodily injury to the operator. IF ANY OF THE FOLLOWING CONDITIONS EXIST, OPERATOR MUST NOT USE THE APPLIANCE. (Only a trained service personnel should make repairs.) 1) A broken door hinge. 2) A broken door viewing screen. 3) A broken front panel, oven cavity. 4) A loosened door lock. 5) A broken door lock.
SPECIFICATIONS MODEL KOG-37DP0S POWER SUPPLY POWER CONSUMPTION 230V-50Hz, SINGLE PHASE WITH EARTHING MICROWAVE 1200W GRILL 1050W COMBINATION 2200W MICROWAVE ENERGY OUTPUT 800W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 465x279x342mm (18.3x11.0x13.5 in.) CAVITY DIMENSIONS (W X H X D) 290x220x306mm (11.4x8.7x12.0 in.) NET WEIGHT APPROX. 14Kg (30.9 lbs.) TIMER 59 min. 90 sec. FUNCTION SELECTIONS MICROWAVE POWER SELECTIONS 4 LEVELS CAVITY VOLUME 0.7 Cu.Ft.
EXTERNAL VIEWS 1.
2. FEATURE DIAGRAM 1 2 3 4 5 6 7 w q 0 9 8 1. Door seal - Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage. 9. Roller guide - This must always be used for cooking together with the glass cooking tray. 10. Glass cooking tray - Made of special heat resistant gkass. Food in a proper receptacle is placed on this tray for cooking. 2. Reflector (Insulator Heater) 3. Heating Element 11. Door viewing screen - Allows viewing of food.
3. CONTROL PANEL Auto Def. Grill Combi g e Hight Low Warm Timer r KOG-37DP 1 2 3 Frozen Pizza Chicken Piece Croissant WEIGHT t y 1. Small Piece 2. Big Piece Combi Grill u M/W p Kitchen Timer ur 1ho 10m. d Grill i Combi Clock in. 10m 1m. Stop/Clear in. 1m 10s. Start 13. Display - Cooking time, power level, indicators and present time are displayed. o a s f 19. Combination - Used to cook combination. 20. Kitchen Timer - Used to set a minute timer. 14.
INSTALLATION 1. Steady, flat location This microwave oven should be set on a steady, flat surface. This microwave oven is designed for counter top use only. 2. Leave space behind and side All air vents shouls be kept a clearance. If all vents are covered during operation, the oven may overheat and, eventually, cause failure. 3. Away from radio and TV sets Poor television reception and radio interference may result if the oven is located close to a TV, radio, antenna or feeder and so on.
OPERATIONS AND FUNCTIONS 1. Connect the mains lead to an electrical socket-outlet. 2. After placing the food in a suitable utensil, open the oven door and put it on the glass turntable, Glass turntable must always be in place during cooking. 3. Close the door securely. 4. When the oven door is opened, the light turns off. 5. The oven door can be opened at any time during operation by touching the door release button on the control panel. The oven will automatically shut off.
DISASSEMBLY AND ASSEMBLY Cautions to be observed when trouble shooting. Unlike many other appliances, the microwave oven is a high-voltage, high-current equipment. It is completely safety during normal operation. However, carelessness in servicing the oven can result in an electric shock or possible danger from a short circuit. You are asked to observe the following precautions carefully. 1. Always remove the power plug from the outlet before servicing. 2.
1. To remove cabinet. 1) Remove three screws on cabinet back. 2) Push the cabinet backward. 2. To remove door assembly. 1) Remove a screw which secure the stopper hinge top. 2) Remove the door assembly from top plate of cavity 3) Reverse the above for reassembly. NOTE After replacing the door assembly, perform a check of correct alignment with the hinge and cavity front plate.
3. To remove door parts DOOR ASSEMBLY KOG-37DP0S: 3511714420 KOG-37FP0S: 3511714450 REF NO. PART CODE PART NAME A01 3512203880 FRAME DOOR 3512205200 A02 DESCRIPTION Q’TY REMARK PP SI83C 1 KOG-37DP FRAME DOOR PP SI83C 1 KOG-37FP 3517007300 BARRIER-SCREEN*0 PET T0.125 1 A03 3515204100 STOPPER SINGE *T AS KOR-63150S 1 A04 3511706100 DOOR PAINTING AS KOR-61150S 1 A05 3517002800 BARRIER-SCREEN *I T0.
(1) Remove the gasket door from door painting assembly. (2) Remove the door frame from door painting assembly. (3) Remove the stopper hinge top from door painting assembly. (4) Remove the spring and the hook. (5) Remove the barrier screen outer from door frame. (6) Reverse the above steps for reassembly. 4. Method to reduce the gap between the door seal and the oven front surface.
5. To remove control panel parts. CONTROL-PANEL ASSEMBLY KOG-37DP0S: 3516721640 KOG-37FP0S: 3516721650 REF NO.
6. To remove high voltage capacitor. 1) Remove a screw which secure the grounding ring terminal of the H.V. diode and the capacitor holder. 2) Remove the H.V. diode from the capacitor holder. 3) Reverse the above steps for reassembly. ◆ High voltage circuit wiring 7. To remove magnetron. 1) Remove a screw which secure the magnetron. 2) Remove the magnetron. 3) Reverse the above steps for reassembly.
8. To remove fan motor assembly. (1) Remove a screws for earthing (2) Remove the noise filter from the wind guide. (3) Remove a screw which secure the wind guide assembly. (4) Draw forward the wind guide assembly. (5) Pull the fan from the motor shaft. (6) Remove two screws which secure the motor shaded pole. (7) Remove the motor shaded pole. (8) Reverse the above steps for reassembly. 9. To remove H.V.transformer. (1) Remove four screws holding the H.V.transformer. (2) Remove the H.V.transformer.
10. To remove tray motor. (1) Remove the coupler in the cavity. (2) Turn the set upside down. (3) Cut the tray motor cover part from the base plate. (4) Remove the tray motor cover. (5) Remove a screw which secure the tray motor. (6) Remove the tray motor. (7) Reverse the above steps for reassembly except for securing the tray motor cover with screw. 11. To remove heater assembly. (1) Remove the three nuts. (2) Remove the insulator heater assembly. (3) Reverse the above steps for reassembly.
12. To remove heater parts. REF.NO PART CODE PART NAME DESCRIPTION C01 7392500008 NUT HEX 6N-2-5 SUS 1 C02 3515000600 SPACER INSULATOR *I C3771BD 2 C03 3513301100 INSULATOR HEATER SPP T0.
INTERLOCK MECHANISM AND ADJUSTMENT The door lock mechanism is a device which has been specially designed to completely eliminate microwave radiation when the door is opened during operation, and thus to perfectly prevent the danger resulting from the leakage of microwave. (1) Primary interlock switch When the door is closed, the hook locks the oven door. If the door is not is not closed properly, the oven will not operate. When the door is closed, the hook pushes the button of the microswitch.
TROUBLE SHOOTING GUIDE Following the procedure below to check if the oven is defective or not. 1) Check earthing before trouble checking. 2) Be careful of the high voltage circuit. 3) Discharge the high voltage capacitor. 4) When checking the continuity of the switches, fuse or high voltage transformer, disconnect one lead wire from these parts and check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.
CONDITION Outlet has proper voltage Fuse does not blow. CHECK RESULT CAUSE REMEDY No Continuity Defective magnetron Replace Check continuity of magnetron Check continuity of noise filter board No Continuity Defective line filter board Replace Check continuity of power supply cord No Continuity Open power supply cord Replace Normal Defective touch control circuit Replace NOTE All these switches must be replaced at the same time, please refer to "Interlock Mechanism And Adjustment".
(TROUBLE 3) No microwave oscillation even though fan motor rotates.
(TROUBLE 4) The following visual conditions inditions indicate a probable defective touch control circuit or membrane switch assembly 1. Incomplete segments, 1) Segments missing. 2) Partical segments missing. 3) Digit flickering other than normal display slight flickering. 4) " 88:88" does not display when power is on. 2. A distinct change in the display are not on when they should be. 3. One or more digits in the display are not on when they should be. 4.
MEASUREMENT AND TEST 1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT Microwave output power can be checked by indirectly mmeasuring the temperature rise of a certain amount of water exposed to the microwave as directed below. PROCEDURE 1. Microwave power output measurement is made with the microwave oven supplied at rated voltage and operated at its maximum microwave power setting with a load of 100 ± 5cc of potable water. 2.
2. MICROWAVE RADIATION TEST CAUTION 1. Make sure to check the microwave leakage before and after repair of adjustment. 2. Always start measuring of an unknown field to assure safety for operating personnel from microwave energy. 3. Do not place your hands into any suspected microwave radiation field unless the safe density level is known. 4. Care should be taken not to place the eyes in direct line with the source of microwave energy. 5.
3. COMPONENT TEST PROCEDURE • High voltage is present at the high voltage terminal of the high voltage transformer during any cooking cycle. • It is neither necessary nor advisable to attempt measurement of the high voltage. • Before touching any oven components or wiring, always unplug the oven from its power source and discharge the capacitor. 1. High voltage transformer 1) Remove connections from the transformer terminals and check continuity. 2) Normal readings should be as follows : Secondary winding .
WIRING DIAGRAM 26
PRINTED CIRCUIT BOARD 1. CIRCUIT CHECK PROCEDURE 1. Low voltage transformer check The low voltage transformer is located on the P.C.B. Measuring condition: Input voltage: 230V / Frequency: 50Hz Terminal Voltage LOAD NO LOAD 6- 4, 7 AC 12.6 V AC 14.7 V NOTE 1. Refer to Ciruit Diagram (point 4). 2. Secondary side voltage of the low voltage transformer changes in proportion to fluctuation of power source voltage. 3. The allowable tolerance of the secondary voltage is within ± 5% of nominal voltage. 2.
MP1 MP2 Mesurement point 28
3. When there is no microwave oscillation 1) When touching START pad, oven lamp does not turn on. Fan motor do not rotate, but cook indicator in display comes on. Cause : RELAY 2 does not operate. refer to Circuit Diagram (point 3) - Check method POINT A STATE B RELAY 2 ON 5VDC GND RELAY 2 OFF GND 12VDC 2) When touching START pad, oven lamp turns on. Fan motor and turntable rotate and cook indicator in display comes on. Cause : RELAY 1 does not operate.
2. P.C.B.
3. P.C.B.
EXPLODED VIEW AND PARTS LIST 1. DOOR ASSEMBLY Refer to Disassembly and assembly 2. CONTROL PANEL ASSEMBLY Refer to Disassembly and assembly 3.
(1) KOG-37DP0S / KOG-37FP0S REF NO PART CODE PART NAME DESCRIPTION Q'TY A00 DOOR AS Refer to disassembly and assembly 1 B00 CONTROL PANEL AS Refer to disassembly and assembly 1 C00 3513302700 INSULATOR HEATER AS Refer to disassembly and assembly 1 F01 3510805300 CABINET AS PCM T0.5 1 F02 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN 3 3516109010 CAVITY WELD AS CAVITY WELD AS 1 3516109610 CAVITY JOINT AS CAVITY JOINT AS 1 F04 7S627W50X1 NUT HEX NUT FLANGE M5X0.
REF NO PART CODE F32 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN 5 F33 3512100900 FOOT PP DASF-130 2 F34 7272400811 TAPTITE SCREW TT3 TRS 4X8 MFZN 1 F35 3515201101 STOPPER HINGE *U SCP-1 T2.
DAEWOO ELECTRONICS CO., LTD. 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” PRINTED DATE: Jul.
