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Daewoo KOC-1C0K5S Service Manual
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Daewoo KOC-1C0K5S Service Manual

Daewoo KOC-1C0K5S Service Manual

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Service Manual
Microwave Oven
Model: KOC-1C0K5S
KOC-1C2R7S
KOC-1C2R7SA8
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).
S/M No. :
June. 2015

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Summary of Contents for Daewoo KOC-1C0K5S

  • Page 1 S/M No. : Service Manual Microwave Oven Model: KOC-1C0K5S KOC-1C2R7S KOC-1C2R7SA8 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).
  • Page 2 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. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make repairs if 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.
  • Page 3 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.
  • Page 4 2. SPECIFICATIONS MODEL KOC-1C0K5S / KOC-1C2R7S POWER SUPPLY 230V~50Hz, SINGLE PHASE WITH earthing MICROWAVE 1450W GRILL 1250W POWER CONSUMPTION CONVECTION 2650W COMBINATION 2750W, MAX 2900W 800W (KOC-1C0K5S) MICROWAVE ENERGY OUTPUT 900W (KOC-1C2R7S/KOC-1C2R7SA8) MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 524X375X477mm(20.63X14.76X18.78in)
  • Page 5 • T his appliance is supplied with cable of special type, which, if damaged, must be repaired with cable of same type. • Such a cable can be purchased from DAEWOO and must be installed by a Qualified Person. 6. Examine the oven after unpacking for any damage such as: A misaligned door, broken door or a dent in cavity.
  • Page 6 4. CONTROL PANEL - KOC-1C0K5S 1 Display 6 Control Dial Knob ( The display shows you some information such as You can enter cooking time, quantity, weight, and cooking time, menu, quantity and temperature and so temperature by turning the Control Dial knob. 7 Selection( ) Button: You can confirm the contents 2 Quick defrost( ) Button you entered by pressing the Selection button.
  • Page 7 - KOC-1C2R7S 1 Display 0 Auto cook Button The display shows you some information such as Press this button to select Auto cook. cooking time, menu, quantity and temperature and so q Instant cook Button Press this button to select Instant cook. 2 Convection cook Button Press this button to select Convection cook. w Deodorization Button The oven has a special function to blow off smells in the oven.
  • Page 8 - KOC-1C2R7SA8 1 Display 0 Auto cook Button The display shows you some information such as Press this button to select Auto cook. cooking time, menu, quantity and temperature and so q Instant cook Button Press this button to select Instant cook. 2 Convection cook Button Press this button to select Convection cook. w Deodorization Button The oven has a special function to blow off smells in the oven.
  • Page 9 5. DISPLAY WINDOW - KOC-1C0K5S 1 Display window 5 Icons of cooking menu The display shows you some cooking information such : It means Quick defrost. lights in the display as cooking time, clock, temperature, quantity and so on. during Quick defrosting. : It means Steam cleaning. lights in the display during Steam cleaning.
  • Page 10 - KOC-1C2R7S/ KOC-1C2R7SA8 1 Display window 4 Icons of cooking menu The display shows you some cooking information such : It means Deodorization. lights in the display as cooking time, clock, temperature, quantity and so on. during Deodorization. : It means Steam cleaning. lights in the display during Steam cleaning. : It means Preheating.
  • Page 11 6. ACCESSORIES This oven is equipped with several accessories. They can be used in various ways to facilitate cooking. 1 Metal Tray - Put food or proper cookware on the metal tray. NOTE : Metal Tray is attached to the left cushion. 2 Grill Rack - Put the grill rack on the metal tray.
  • Page 12 STEAM BOWL GUIDE (Optional) ■ Component parts of Steam bowl WARNING: • The oven and steam bowl is very hot after cooking. • Use thick oven globes while you are handling food or accessories. Steam plate Tips : You can cook small items faster than larger ones. Base bowl And uniform sized food will be cooked more evenly.
  • Page 13 7. INTERLOCK MECHANISM AND ADJUSTMENT CONDITION : DOOR OPEN LEFT RIGHT RED/RED INTERLOCK MONITOR SWITCH BLACK/BLUE BLUE BLUE / RED BLUE RED/RED SWITCH PRIMARY HOOK INTERLOCK SWITCH CONDITION : DOOR CLOSE LEFT RIGHT...
  • Page 14 8. WIRING PROCEDURE MAIN PCB (KOC-1C0K5S) LOCATION PART NAME WIRING COLOR FUNCTION MW RELAY Black & White, Black & White Control M/W HALOGEN HEATER RELAY White & Red, Black Control halogen heater(Side heater) TOP HEATER RELAY White & Black, Black...
  • Page 15 MAIN PCB (KOC-1C2R7S/ KOC-1C2R7SA8) LOCATION PART NAME WIRING COLOR FUNCTION MW RELAY Black & White, Black & White Control M/W TOP HEATER RELAY White & White, Black Control heater top CONVECTION RELAY Blue, Blue Control heater back Prevent the current of oven from rising SLOW ACTING RELAY White &...
  • Page 16 9. WIRING DIAGRAM...
  • Page 17 CAPACITOR HV 2100VAC 1.10UF #187 80MM 3518400800 DIODE HV ESJC13-12BX (CL01-12) 3513601710 LAMP BL 240V 25W T25 CC7A H187 99% 3512784230 HARNESS MAIN KOC-1C0K5S 3512783910 HARNESS CONVECTION AS KOC-1C0KKS 3518701900 FUSE H.V 5kV 0.8A T.H.V. 060T 4415A17352 SW MICRO SZM-V16-FA-63...
  • Page 18 11. 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.
  • Page 19 1. To remove cabinet 1) Remove four screws on cabinet back. 2) Push the cabinet backward. 2. To remove door ASS'Y 1) Remove each two screws (total 4EA) on left and right sides. 2) Remove spring hinges in both sides. * It is easy to remove the bottom of spring firstly and to set the top of spring firstly.
  • Page 20 4-1. EXPLODED VIEW AND PARTS LIST OF DOOR ASS'Y. (KOC-1C0K5S) DOOR AS : 3511728890 PART CODE PART NAME DESCRIPTION Q'TY REMARK 3512603830 HANDLE DOOR *O ABS SPRAY KOC-1C0KQS 3515309510 SUPPROTER HANDLE PO T1.6 3512603910 HANDLE DOOR *I 3517010740 BARRIER-SCREEN *O TEMP GLASS T3.2 BLACK...
  • Page 21 4-2. EXPLODED VIEW AND PARTS LIST OF DOOR ASS'Y. (KOC-1C2R7S/ KOC-1C2R7SA8) DOOR AS : 3511733740 PART CODE PART NAME DESCRIPTION Q'TY REMARK 3512611230 HANDLE DOOR 3515311010 SUPPORTER HANDLE ABS SG-0760D SG-175 SPRAY 3517014430 BARRIER SCREEN *O TEMP GLASS T3.2 BEDA WH 3512210350 FRAME DOOR ABS XR-401...
  • Page 22 5-1. EXPLODED VIEW AND PARTS LIST OF CONTROL PANEL. (KOC-1C0K5S) CONTROL-PANEL AS : PKCPSWALB0 PART CODE PART NAME DESCRIPTION Q'TY REMARK 3511620100 DECORATOR C-PANEL SAN T1.5 BLACK 3516725930 CONTROL-PANEL PC+ABS HR-5007A SPRAY KOC-1C0KPSA8 3516913020 BUTTON FUNCTION-A ABS COATING 3516913010 DECORATOR KNOB...
  • Page 23 5-2. EXPLODED VIEW AND PARTS LIST OF CONTROL PANEL. (KOC-1C2R7S/ KOC-1C2R7SA8) CONTROL-PANEL AS : 3516748900 PART CODE PART NAME DESCRIPTION Q'TY REMARK 3516748900 CONTROL-PANEL AS KOC-1C2R7S 3516922720 BUTTON KNOB ABS SG-0760D,SG-175 3513412810 KNOB VOLUME ABS SG-0760D SG-175 SPRAY 3511625340 DECORATOR KNOB ABS SG-0760D SG-175 COATING 3511621620 DECORATOR FILM...
  • Page 24 6. To remove high voltage capacitor 1) Remove a screw which secure the grounding ring Capacitor Holder terminal of the H.V.diode and capacitor holder. 2) Remove the H.V.capacitor from the capacitor holder. H.V.Capacitor 3) Remove the H.V.diode from the H.V.Capacitor. H.V.Diode 4) Reverse the above steps for reassembly.
  • Page 25 7. TO REMOVE MAGNETRON 1) Remove a screw which secure the magnetron. 2) Remove the magnetron. 3) Reverse the above steps for reassembly. NOTE: Never install the magnetron without the metallic gasket plate which is packed with each magnetron to prevent microwave leakage.
  • Page 26 8. TO REMOVE BLOWER MOTOR 1) Remove a screw which secure the cover motor blower. 2) Remove a screw which secure the blower motor. 3) Remove the cover motor blower. 4) Remove the wire which connecting the blower motor 5) Push a latch of blower motor and draw backward 6) Reverse the above steps for reassembly.
  • Page 27 10. TO REMOVE TOP HEATER 1) Remove a nut which secure the top heater. 2) Pull out the heater. 11. TO REMOVE HALOGEN HEATER (OPTIONAL) (SIDE HEATER) Halogen heater cover 1) Remove a screw in insulator heater top. Halogen heater 2) Remove the wire which connecting the halogen heater.
  • Page 28 12. TO REMOVE NOISE FILTER 1) Remove a screw which secure the noise filter. 2) Remove a screw which earth to wire from noise filter. 3) Remove a noise filter from the bracket noise filter. 13. TO REMOVE SPEAKER (OPTIONAL) 1) Remove a screw which secure the base plate and speaker holder 2) Remove speaker holder and speaker...
  • Page 29 14. EXPLODE VIEW AND PARTS LIST OF BACK HEATER ASSEMBLY C01 C02 HEATER *B AS : 3512808410 PART CODE PART NAME DESCRIPTION Q'TY REMARK 7S628W40X1 NUT HEX NUT FLANGE M4X0.7P MFZN 3511800700 FAN CONVECTION SA1D T0.5 3512808000 HEATER 230V 1400W KAWAI 3512806000 HEATER REFLECTOR SA1D T0.5...
  • Page 30 15-1. TOTAL ASSEMBLY AND PARTS LIST...
  • Page 31 PART CODE PART NAME DESCRIPTION Q'TY REMARK 3511728890 DOOR AS KOC-1C0K5S BK PKCPSWALB0 CONTROL-PANEL AS KOC-1C0K5S 3510611600 BRACKET NOISE FILTER 3518606880 NOISE FILTER DWLF-M27-4 250V 15A 3513001900 HOLDER HV CAPACITOR SECC T0.5 3518303901 CAPACITOR HV 2100VAC 1.1UF #187+3 3518701900 FUSE HV 5KV 0.8A T.H.V.060T...
  • Page 32 PART CODE PART NAME DESCRIPTION Q'TY REMARK 4415A17352 SW MICRO SZM-V16-FA-63 3513703700 LEVER LOCK 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN 3513304610 INSULATOR HEATER *T SBHG T0.8 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN 3518400800 DIODE HV AS DIODE HV AS 7122400811 SCREW TAPPING...
  • Page 33 15-2. TOTAL ASSEMBLY AND PARTS LIST (KOC-1C2R7S/ KOC-1C2R7SA8)
  • Page 34 PART NAME DESCRIPTION Q'TY REMARK 3511733740 DOOR AS KOC-1C2RWC 3516748900 CONTROL-PANEL AS KOC-1C2R7S 3516120010 CAVITY AS KOC-1C0K5S(NON BRACKET STIRRER MOTOR) 3510611600 BRACKET NOISE FILTER 3518606880 NOISE FILTER DWLF-M27-4 250V 15A 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN 3518401300 DIODE HV CL01-12...
  • Page 35 SW MICRO SZM-V16-FA-63 3513703700 LEVER LOCK 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN 3513304630 INSULATOR HEATER *T KOC-1C0K5S 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN 7122400811 SCREW TAPPING T2S TRS 4X8 MFZN 3513601710 LAMP BL 240V 25W T25 CC7A H187 99%...
  • Page 36 12. 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. • B efore touching any oven components or wiring, always unplug the oven from its power source and discharge the capacitor. • To measure resistance of each component, refer to figures. 1. High voltage transformer 1) Remove connections from the transformer terminals and check continuity. 2) Normal readings should be as follows : 1 Secondary winding ... Approx. 130Ω ~ 160Ω 2 Filament winding ... Approx. 0.2Ω ~ 0.4Ω 3 Primary winding ... Approx. 1.3Ω ~ 2.1Ω 2. High voltage capacitor 1) Check continuity of capacitor with meter on the highest OHM scale.
  • Page 37 5. BLOWER MOTOR AND CONVECTION MOTOR 1) Remove a connector from the motor. 2) Measure resistance between two terminals like as following figure. 3) Reading of blower motor is 60Ω and convection motor is 270Ω . 4) It is normal to stop convection motor smoothly, when door is open during convection mode. =>...
  • Page 38 8. POWER CODE 1) Remove a connector from the power code. 2) Check each continuity of N-N and L-L terminal like as following figure. 3) It should be normal to keep continuous continuity. 9. INTERLOCK SWITCH BUTTON There are three terminals in interlock switch : COM, NO, NC. 1) NC and COM terminals are connected by ordinary condition.
  • Page 39 13. TROUBLE SHOOTING GUIDE Following the procedure below to check if the oven is defective or not. 1) Check grounding before checking trouble 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, check continuity with the AC plug removed.
  • Page 40 2. Check points after repair - After repair or replacement of parts, operate the oven in M/W mode. There will be occur following problems. 2-1) Display doesn't show again, after opening and closing the door CHECK RESULT CAUSE AND REMEDY Check the continuity between find the trouble in 1) Replace switch...
  • Page 41 TROUBLE2) Although display shows, No microwave oscillation or the oven does not start cooking 1. Check points CHECK RESULT CAUSE AND REMEDY Check contact of door hook to Modify location of door and primary interlock switch, monitor Fault contacts door hook or replace door switch and DOM switch assembly Check...
  • Page 42 TROUBLE3) Although display shows, oven cooking is not operated (Including operating problems of start button) 1. Check points CHECK RESULT CAUSE AND REMEDY Check contact of door hook to Modify location of door and primary interlock switch, monitor Fault contacts door hook or replace door switch and DOM switch assembly...
  • Page 43 TROUBLE4) When "ERROR2" or "ERROR3" come on display DISPLAY When does happen these ERRORs ? Error3 happen that the temperature sensor (thermister) dosen't connect to P.C.B connector Error2 happens if the temperature of cavity is very high After the oven is cooled enough, operate again If Display show "Err2"...
  • Page 44 TROUBLE 5) 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.
  • Page 45 14. PRINTED CIRCUIT BOARD 1-1. PCB PARTS (KOC-1C0K5S) MAIN PCB LOCATION PART NAME FUNCTION MW R ELAY Control M/W HALOGEN HEATER RELAY Control halogen heater (side heater) TOP HEATER RELAY Control top heater CONVECTION RELAY Control back heater SLOW ACTING RELAY...
  • Page 46 1-2. PCB PARTS (KOC-1C2R7S/ KOC-1C2R7SA8) MAIN PCB LOCATION PART NAME FUNCTION MW R ELAY Control M/W TOP HEATER RELAY Control top heater CONVECTION RELAY Control back heater SLOW ACTING RELAY Prevent the transient current (while)operating M/W Let a micon decide Open and close of door NO.
  • Page 47 2-1. PCB PATTERN DIAGRAM...
  • Page 48 2-2. PCB PATTERN DIAGRAM (KOC-1C2R7S/ KOC-1C2R7SA8)
  • Page 49 DONGBU DAEWOO ELECTRONICS CORP. Dongbu Financial Center, 432, Teheran-ro, Gangnam-gu, Seoul 135-523, Korea S/M NO. : PRINTED DATE: June. 2015...
  • Page 50 서울 종로구 통의동 6번지 이룸빌딩 4층 담 당 이태희 님 M O D E L KOC-1C0K5S / KOC-1C2R7S(S/M) 접 수 2013.07.15 M E M O 총 49p 13.07.15-표지, 표지뒤, 3p, 6p, 10p, 11p, 14p, 15p, 20p, 21p, 22p, 23p, 24p 수정_ 신규...

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