S/M No. : R1A1G0A003 Service Manual Microwave Oven Model: KOR-1A1G0A KOR-1A1H0A KOR-1A1G1A KOR-1A1H1A KOR-1A1G2A KOR-1A1H2A KOR-1A1G4A KOR-1A1H4A KOR-1A4G0A KOR-1A4H0A KOR-1A4H1A DAEWOO ELECTRONICS CO., LTD. http : //svc.dwe.co.kr Jun.
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 CAUTION This Device is to be Serviced Only by Properly Qualified Service Personner. Consult the Service Manual for Proper Service Procedures to Assure Continued Safety Operation and for Precautions to be Taken to Avoid Possible Exposure to Excessive Microwave Energy. 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.
SPECIFICATIONS 1) KOR-1A1G/H MODEL KOR-1A1G(H)0A/1A POWER SUPPLY POWER CONSUMPTION KOR-1A1G(H)2A/4A 120V~60Hz, SINGLE PHASE WITH GROUNDING MICROWAVE 1400W 1500W 1000W 1100W GRILL COMBINATION MICROWAVE ENERGY OUTPUT MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 539 x 300 x 406 mm (21.2 x 11.8 x 16.0 in.) CAVITY DIMENSIONS (W X H X D) 354 x 228 x 373 mm (13.9 x 9.0 x 14.7 in.) NET WEIGHT 15.5 Kg ( 34.2 lbs.) 16.0 Kg ( 35.31 lbs.) TIMER 99 min. 99 sec.
EXTERNAL VIEW 1.
EXTERNAL VIEW 2. FEATURE DIAGRAM 1) KOR-1A1G/H 1. DOOR SEAL Door seal surfaces prevent microwave escaping from the oven cavity. 2. DOOR HOOK When the door is closed, it will automatically lock shut. If the door is opened while oven operating, the magnetron tube will immediately stop operating. 3. DOOR SCREEN Allows viewing of food. Microwave cannot pass through perforations in screen. 4. SPATTER SHIELD Protects the microwave outlet from splashes of cooking foods. 5.
EXTERNAL VIEW 2) KOR-1A4G/H 1. DOOR SEAL Door seal maintains the microwave within the oven cavity and prevents microwave leakae. 2. DOOR HOOK When the door is closed, it will automatically lock shut. If the door is opened while oven operating, magnetron tube will immediately stop operating. 3. DOOR SCREEN Allows viewing of food. Microwave cannot pass through perforations in screen. 4. SPATTER SHIELD Protects the microwave outlet from splashes of cooking foods. 5.
EXTERNAL VIEW 3. Control panel 1) KOR-1A1G/KOR-1A4G 1. Time set pad - Used to set the cooking time and the present time. 2. Display - Cooking time, power level, indicators and present time are displayed. 3. One touch - Used to cook or reheat specific quantities of food. 4. Auto cook - Used to cook or reheat. 5. More - Used to add time to cooking. 6. Less - Used to remove time from cooking. 7. Auto Defrost - Used to defrost foods(for weight) 8. Power - Used to set power level. 9.
EXTERNAL VIEW 2) KOR-1A1H/KOR-1A4H 1. Time set pad - Used to set the cooking time and the present time. 2. Display - Cooking time, power level, indicators and present time are displayed. 3. One touch - Used to cook or reheat specific quantities of food. 4. More - Used to add time to cooking. 5. Less - Used to remove time from cooking. 6. Auto Defrost - Used to defrost foods(for weight) 7. Power - Used to set power level. 8. Defrost - Used to defrost foods.(for time) 9.
INSTALLATION 1. Steady, flat location This microwave oven should be set on a steady, flat surface. 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 oven 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. 4.
OPERATIONS AND FUNCTIONS 1. Connect the main lead to an electrical outlet. 2. After placing the food in a suitable container, open the oven door and put it on the glass tray. The glass tray must always be in place during cooking. 3. Close the door securely. 4. 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. To restart the oven, close the door and then touch Start. 5.
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 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.
DISASSEMBLY AND ASSEMBLY 1. To remove cabinet 1) Remove three screws on cabinet back. 2) Push the cabinet backward. 2. To remove door assembly 1) Remove screws 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.
DISASSEMBLY AND ASSEMBLY 3. To remove door parts. 1) KOR-1A1G/H REF NO. PART CODE PART NAME DESCRIPTION Q’TY A01 3517005900 BARRIER - SCREEN * O PET TO 0.25 1 A02 3512204300 FRAME DOOR ABS XR - 401, H - 2938 1 A03 3515202900 STOPPER HINGE * T AS KOR - 121M0A 1 A04 3511711300 DOOR PAINTING AS KOR - 1A1G0A 1 A05 3517005800 BARRIER-SCREEN*I PE TO 0.
DISASSEMBLY AND ASSEMBLY 2) KOR-1A4G/H REF NO. PART CODE PART NAME DESCRIPTION Q’TY A01 3511711300 DOOR PAINTING AS KOR-1A1G0A 1 A02 3513100730 HOOK POM BLACK 1 A03 3515101300 SPRING HOOK PW1 1 A04 3517005910 BARRIER-SCREEN * O GLASS T3.2 2 1 A05 3512204320 FRAME DOOR ABS XR-401 SB-175 1 A06 3511604700 DECORATOR DOOR * T STS304 T0.6 1 A07 3511604710 DECORATOR DOOR * U STS304 T0.
DISASSEMBLY AND ASSEMBLY 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.
DISASSEMBLY AND ASSEMBLY 5. To remove control panel parts. 1) KOR-1A1G/H REF NO. B01 B02 B03 B04 B05 B06 B07 PART CODE 3518522100 3518522110 3516722300 3514321910 PKMPM SXV00 7122401211 3513702800 441G430171 3516907900 PART NAME SWITCH MEMBRANE SWITCH MEMBRANE CONTROL-PANEL PCB AS PCB AS SCREW TAPPING LEVER DOOR OPEN BUTTON SPRING BUTTON DOOR OPEN DESCRIPTION KOR-1A1G0A KOR-1A1H0A ABS AF-345, HFA-700HT KOR-161H0A KOR-130A0A T2S TRS 4X12 MFZN ABS XR-401 H-2938 SWP DIA 0.
DISASSEMBLY AND ASSEMBLY 2) KOR-1A4G/H REF NO. B01 B02 B03 B04 B05 PART CODE 3511604800 3518522130 3518522140 3516722320 3514321910 7122401211 PART NAME DECORATOR C-PANEL SWITCH MEMBRANE SWITCH MEMBRANE CONTROL-PANEL PCB AS SCREW TAPPING DESCRIPTION STS304 T0.6 KOR-1A4G0A KOR-1A4H0A/1A ABS AF-315/345 HFA-700HT KOR-1A1G0A T2S TRS 4* 12 MFZN Q'TY 1 1 1 1 1 3 REMARK 1) Remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly.
DISASSEMBLY AND ASSEMBLY 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.
DISASSEMBLY AND ASSEMBLY 8. To remove wind guide assembly. 1) Remove a screw which secure the wind guide assembly. 2) Draw forward the wind guide assembly. 3) Pull the fan from the motor shaft. 4) Remove two screws which secure the motor shaded pole. 5) Remove the motor shaded pole. 6) Reverse the above steps for reasembly. 9. To remove H.V. transformert. 1) Remove four screws holding the H.V.transformer. 2) Remove the H.V.transformer. 3) Reverse the above steps for reassembly.
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) KOR-1A1G/H 2) KOR-1A4G/H (1) Primary interlock switch When the door is closed, the hook locks the oven door. If the door is not closed properly, the oven will not operate.
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 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.
TROUBLE SHOOTING GUIDE CONDITION Outlet has proper voltage Fuse does not blow.
TROUBLE SHOOTING GUIDE (TROUBLE 3) No microwave oscillation even though fan motor rotates.
TROUBLE SHOOTING GUIDE (TROUBLE 4) The following visual conditions indicate a profective 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) “:0”does not display when power is on. 2. A distinct change in the display are not on when they numbers is the display. 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 measuring 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.
MEASUREMENT AND TEST 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.
MEASUREMENT AND TEST 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.
WIRING DIAGRAM 1) KOR-1A1G(H)0A/KOR-1A4G(H)0A 28
GE(GN) BL(WH) BR(BK) N N 29 WH BK GY NC NO WH 2 GN BL RELAY-2 RELAY-1 L RD WH WH WH GM BK 3 R GY RD HIGH VOLTAGE TRANSFORMER : ORANGE CL : CAVITY LAMP [ CONDITION ] : BLUE FM : FAN(BLOWER) MOTOR DOOR : CLOSED GM : GEARED MOTOR : GRAY COOK : OFF : GREEN/YELLOW FM SWITCH SECONDARY INTERLOCK GN INTERLOCK MONITOR SWITCH COM OR BL GY GE CL RD BK RD 1 WH CONTROL P.W.B.
30 NEUTRAL GN LIVE RD GN : GREEN BR : BROWN NOTE : RD : RED WH : WHITE BK : BLACK SINGLE PHASE ONLY POWER SUPPLY : FUSE RD GY GY FM 2 1 WH GN BL L WH WH 3 BK R GY RD RD HIGH VOLTAGE MGT THERMOSTAT TRANSFORMER [ CONDITION ] DOOR : CLOSED COOK: OFF GM SECONDARY INTERLOCK SWITCH GN RELAY-2 RELAY-1 CONTROL P.W.B.
GE(GN) BL(WH) BR(BK) SINGLE PHASE N N 31 NEUTRAL LIVE GN : GREEN BR : BROWN NOTE : RD : RED WH : WHITE BK : BLACK GN L L FUSE FILTER ASS'Y ONLY POWER SUPPLY : RD GY GY FM 2 BL WH CL : CAVITY LAMP FM : FAN(BLOWER) MOTOR GM : GEARED MOTOR WH GN RELAY-2 RELAY-1 L 3 BK R GY RD RD HIGH VOLTAGE MGT THERMOSTAT TRANSFORMER [ CONDITION ] DOOR : CLOSED COOK : OFF GM SECONDARY INTERLOCK SWITCH GN INTERLOCK WH MONITOR SWITCH GE : GREEN/YELLOW OR : ORANGE BL : BLUE GY : GRAY GY
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 : 120V / Frequency : 60Hz Terminal Voltage LOAD NO LOAD 4-7 AC 12.6 AC 14.7V NOTE 1. Refer to Circuit 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 ¡ ¾ 5% of normal voltage. 2.
PRINTED CIRCUIT BOARD Measure Point 33
PRINTED CIRCUIT BOARD 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 B RELAY 2 ON - 5V DC GND RELAY 2 OFF GND - 12VDC STATE 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.
PRINTED CIRCUIT BOARD 2. P.C.B.
PRINTED CIRCUIT BOARD 3. P.C.B. LOCATION NO NO.
EXPLODED VIEW AND PARTS LIST 1. DOOR ASSEMBLY Refer to Disassembly and assembly. 2. CONTROL PANEL ASSEMBLY Refer to Disassembly and assembly. 3.
EXPLODED VIEW AND PARTS LIST (1) KOR-1A1G/H REF.NO. PART CODE A00 B00 3511711200 PART NAME DOOR AS DESCRIPTION Q’TY REMARK KOR-1A1G0A 1 PKCPSWXN00 CONTROL-PANEL AS KOR-1A1G0A 1 1A1G0A / -1A PKCPSWXP00 CONTROL-PANEL AS KOR-1A1H0A 1 1A1H0A / -1A PKCPSWXY00 CONTROL-PANEL AS KOR-1A1G2A 1 1A1G2A / -4A PKCPSWXZ00 CONTROL-PANEL AS KOR-1A1H2A 1 1A1H2A / -4A F01 3510802500 CABINET PCM T0.
EXPLODED VIEW AND PARTS LIST REF.NO.
EXPLODED VIEW AND PARTS LIST (2) KOR-1A4G/H F47 F48 F12 F13 F14 F15 40
EXPLODED VIEW AND PARTS LIST (2) KOR-1A4G/H REF.NO PART CODE A00 3511711220 B00 PART NAME DESCRIPTION Q'TY DOOR AS KOR-14AG0A 1 PKCPSWXQ00 CONTROL-PANEL AS KOR-1A4G0A 1 PKCPSWXR00 CONTROL-PANEL AS KOR-1A4H0A 1 REMARK 1A4H0A/1A F01 3510802500 CABINET PCM T0.
EXPLODED VIEW AND PARTS LIST REF.
DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : “DAEWOOELEC” FAX : 02)360-7877 TEL : 02)360-7804 E-mail : G7F00E@web.dwe.co.kr // PRINTED DATE : APRIL.
