S/M No. : OC8H6T7S01 Service Manual Microwave Oven Model: KOC-8H6T7S ✔ Caution : In this Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr). Nov.
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.
1. 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.
2. SPECIFICATIONS MODEL KOC-8H6T7S POWER SUPPLY MICROWAVE 230V~50HZ, SINGLE PHASE WITH EARTHING 1400W POWER GRILL 850W CONSUMPTION COMBECTION 1850W COMBINATION 2500W MICROWAVE ENERGY OUTPUT 900W(IEC705) MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 501X473X391mm (19.7X18.6X12.6 in.) CAVITY DIMENSIONS (W X H X D) 310X328X232mm (12.2X12.9X9.1 in.) NET WEIGHT APPROX. 18kg (39.6 lbs.
3. EXTERNAL VIEW 1.
2. FEATURE DIAGRAM r 2 e 4 w 56 1 7 8 0 q 9 3 11.DOOR HOOK When the door is closed, it will automatically lock shut. If door is opened while oven is operating, the magnetron will immediately stop operating. 12.DOOR VIEWING SCREEN Allows viewing of food. The screen is designed so that light can pass through, but not the microwave. 13.METAL RACK 14.TOP HEATER Turns on when convection, grill and combi cooking is selected. 15.OVEN LAMP Automatically turns on during oven operating. 16.
4. 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 should 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.
5. CONTROL PANEL • LED LAMP 1 Auto Cook : Show “Auto Cook” cooking in progress. (5 menus) 2 Instant Cook : Show “Instant Cook” cooking in progress. (5 menus) 3 Steam Cleaning : Show steam cleaning in progress. 4 Convection : Show “Convection” cooking including fermentation function in progress. 5 Auto Defrost : Show auto defrosting in progress. 6 M/W : Show “microwave” cooking in progress. 1 4 7 Grill : Show grilling in progress. 5 2 8 Combi : Show “Combi” cooking in progress.
DISPLAY 3 1 2 1 THE NUMBER AND LETTER DISPLAY Clock, cooking time, temperature and locking etc are displayed. 2 THE ACCESSORY DISPLAY The accessory used on cooking light in display. Use the lighting accessory on cooking. : means Glass Turntable Tray. : means Metal Tray. : means Low Metal Rack. : means High Metal Rack. example) If the display lights like example. Please use the Glass Turntable Tray and the Metal Tray 3 OPERATION GUIDE DISPLAY Use the oven easily by following the operation guide display.
6. DISASSEMBLY AND ASSEMBLY - Cautions to be observed when trouble shooting. Unlike many other appliances, the microwave oven is high-voltage, high-current equipment. It is completely safe 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 four screws on cabinet back. 2) Push the cabinet backward. 2. To remove guide wind assembly 1) Remove two screws which secure the stopper hinge top. 2) Remove the door assembly from top plate of cavity. 3) Reverse the above for assemby. NOTE: After replacting the door assembly, perform a check of correct alignment with the hinge and cavity front plate.
✔ Caution : In this Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr). 3. To remove door parts. REF NO. PART CODE PART NAME DESCRIPTION Q’TY A01 3516601400 DOOR-PLATE SBHG-1A T0.
4. Method to reduce the gap between the door seal and the oven front surface. (1) To reduce gap located on part ‘A’. • Loosen two screws on stopper hinge top, and then push the door to contact the door seal to oven front surface. • Tighten two screws. (2) To reduce gap located on part ‘B’. • Loosen two screws on stopper hinge under, and then push the door to contact the door seal to oven front surface. • Tighten two screws.
✔ Caution : In this Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr). 5. To remove control panel parts. 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 wind guide assembly. 1) Remove a screw 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 reasembly. 9. To remove H.V.transformer. 1) Remove four screws holding the H.V.transformer. 2) Remove the H.V.transformer.
✔ Caution : In this Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr). 10.To remove Top heater assembly parts. REF NO. PART CODE PART NAME 1 3512805800 HEATER MIRACLON 2 3512806900 3 7121400611 4 DESCRIPTION Q’TY 230V 800W 270MM 1 HEATER REFLECTOR STS430 T0.
✔ Caution : In this Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr). 11.To remove Rear heater assembly parts. REF NO.
7. 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.
8. TROUBLE SHOOTING GUIDE Following the procedure below to check if the oven is defective or not. 1) Check grounding 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 tranformer, disconnect one load 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 CHECK RESULT CAUSE REMEDY Outlet has proper voltage fuse does not blow? Check continuity of magnetron No continuity Defective magnetron. Replace 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 continuity Defective touch control circuit Replace NOTE : All these switches must be replaced at the same time, please refer to (7.
TROUBLE 3) No microwave oscillation even though fan motor rotates.
(TROUBLE 4) Grill heater (upper heater) is not heated; food will not become hot. CONDITION Grill heater is not heated. CHECK RESULT CAUSE REMEDY Check continuity of primary interlock switch No continuity Malfunction of primary Interlock switch Adjust or replace Check continuity of secondary interlock switch No continuity Malfunction of secondary interlock switch Adjust or replace Check continuity of heater No continuity Defective heater Check D.
(TROUBLE 6) The following visual conditions indicate a probable defective touch control Circuit or button P.C.B. assembly 1. Incomplete segments. 1) segment missing 2) partial segments missing 3) digit flickering other than normal fluorescent slight flickering 2. A distinct change in the brightness of one or more numbers exists in the display 3. One or more digits in the display are not on when they should be. 4. Display does not count down or up with time cooking or clock operation. 5.
9. MEASUREMENT AND TEST 1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT Microwave output power can be checked by indirectly measuring the temperature rise of a certain amount of water exposed to the microwave as directed below. PROCEDURE 1. A cylindrical container of borosilicate glass is used for the test. It has a maximum thickness of 3mm, an external diameter of approximately 190mm and a height of approximately 90mm. The mass of the container is determined. 2.
2. MICROWAVE RADIATION TEST WARNING 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 .
4.
N L GE BL BR POWER SUPPLY : SINGLE PHASE ONLY N L GN N L [ CONDITION ] DOOR : CLOSED COOK : OFF FUSE LINE FILTER ASS'Y WH RD 28 NC. NO. LAMP T/MOTOR RELAY YW NOTE : OL : OVEN LAMP FM : FAN MOTOR CM : CONVECTION FAN MOTOR TTM : TURNTABLE MOTOR L.V. TRANSFORMER PRIMARY INTERLOCK SWITCH COM. WH RD YW OL RD BK CM BK WH BL BL RD CONVECTION HEATER THERMAL CUT-OUT TOP HEATER CONVECTION HEATER BK RD RD COM.
072 073 071 070 074 030 29 029 003 026 042 002 043 001 022 044 015 004 041 075 023 005 016 048 014 047 010 028 046 045 013 039 063 027 037 025 006 018 057 056 021 007 034 020 024 019 012 011 040 017 009 038 F37 060 032 035 008 031 068 053 055 049 033 036 069 052 054 062 058 051 050 059 061 064 067 066 065 11. EXPLODED VIEW AND PARTS LIST 1. DOOR ASSEMBLY Refer to 6. Disassembly and assembly. 2. CONTROL PANEL ASSEMBLY Refer to 6.
NO PART CORD PART NAME DESCRIPTION 1 3516118500 CAVITY AS KOC-8H5T7S 1 2 3511403800 COVER WAVE GUIDE MICA T0.
NO PART CORD PART NAME DESCRIPTION 39 3518003700 MAGNETRON 2M218JFL 6CF 1 40 3516004000 SPECIAL SCREW T2 BOLT FLANGE 5X12 DACRO 1 41 3512805800 HEATER MIRACLON 230V 800W 270MM 1 42 3512806900 HEATER REFLECTOR STS430 T0.5 1 43 7122408114 SCREW TAPPING T2S TRS 4X6 MFNI 2 44 3511412400 COVER HEATER *T SA1D-80 T0.4 1 45 3510610500 BRACKET COVER HEATER SECC T0.5 1 46 7S312X40A1 SCREW SPECIAL T1 TRS 4*10 SE MFZN 1 47 3512523600 GUIDE AIR OUTLET SBHG T0.
12. PRINTED CIRCUIT BOARD "#$#% &'()*+,-.) /00()!1(2-() 3.45(6-+.4 1(2-() %+6).725( &)289!:2*0 ;24 3.45(6-+.
13. P.C.
14. P.C.B.
DAEWOO ELECTRONICS CORP. 1-2, Jeo-dong 1(il)-ga, Jung-gu, Seoul, Korea C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” S/M NO. : PRINTED DATE: Nov.
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