S/M No. : R161G1A001 Service Manual Microwave Oven KOR-161G1A Model KOR-161H1A • 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...
PRECAUTIONS TO BE OBSERVED BEFORE ANDI DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY (a) Do not operate or allow the oven to be operated w ith the door open. (b) M ake the following safety checks on all ovens to be serviced before activating the m agnetron or other m icrowave source, and m ake repairs as necessary: (1) Interlock operation, (2) Proper door closing, (3) Seal and sealing surfaces (arcing, wear, and other dam age), (4) Dam age to or loosening of hinges and latches, (5) E vidence of dropping or abuse.
SAFETY AND PRECAUTIONS CAUTION This D evice is to be Serviced O nly by P roperly Qualified S ervice P ersonnel. C onsult the Service M anual for P roper S ervice Procedures to A ssure Continued S afety O peration and for P recautions to be Taken to Avoid P ossible E xposure to E xcessive M icrow ave Energy.
SPECIFICATIONS M O D E L KO R -161G /161H P O W E R S U P P LY 120V ~60H z, S ING LE PH A S E W IT H G R O UN D IN G P O W E R M IC R O W AV E 1400W...
EXTERNAL VIEW 2. FEATURE DIAGRAM 1. DOOR SEAL Door seal m aintains the m icrowave within the oven cavity and prevents m icrowave leakage. 2. DOOR HOOK W hen door is closed, it will autom atically lock shut. If door is opened while oven is operating, m agnetron tube w ill im m edi- ately stop operating.
EXTERNAL VIEW 3. CONTROL PANEL - KOR-161G1A 1. Time set pad - Used to set the cooking tim e and the present tim e. 2. Display - Cooking tim e, power level, indicators and present tim e are displayed. 3. One touch - Used to cook or reheat specific quantities of food.
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EXTERNAL VIEW - KOR-161H1A 1. Time set pad - Used to set the cooking tim e and the present tim e. 2. Display - Cooking tim e, power level, indicators and present tim e are displayed. 3. One touch - Used to cook or reheat specific quantities of food. 4.
INSTALLATION 1. Steady, flat location This m icrowave 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.
OPERATIONS AND FUNCTIONS 1. Connect the m ain 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 m ust always be in place during cooking. 3.
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ISASSEMBLY AND ASSEMBLY - Cautions to be observed when trouble shooting. Unlike m any other appliances, the m icrowave oven is high-voltage, high-current equipm ent. It is com pletely safety during norm al operation. However, carelessness in servicing the oven can result in an electric shock or possible danger from a short circuit.
DISASSEMBLY AND ASSEMBLY 1. To remove cabinet 1) Rem ove three screws on cabinet back. 2) Push the cabinet backward. 2. To remove door assem bly 1) Rem ove two screws which secure the stopper hinge top. 2) Rem ove the door assem bly from top plate of cavity. 3) Reverse the above for reassem bly.
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Caution: In this Service 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) DISASSEMBLY AND ASSEMBLY 3.
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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.
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Caution: In this Service 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) DISASSEMBLY AND ASSEMBLY 5.
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DISASSEMBLY AND ASSEMBLY 6. To remove high voltage capacitor. 1) Rem ove a screw which secure the grounding ring term inal of the H.V.diode and the capacitor holder. 2) Rem ove the H.V. diode from the capacitor holder. 3) Reverse the above steps for reassem bly. High voltage circuit wiring 7.
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DISASSEMBLY AND ASSEMBLY 8. To remove wind guide assembly. 1) Rem ove a screw which secure the wind guide assem bly. 2) Draw forward the wind guide assem bly. 3) Pull the fan from the m otor shaft. 4) Rem ove two screws which secure the m otor shaded pole. 5) Rem ove the m otor shaded pole.
INTERLOCK MECHANISM AND ADJUSTMENT The door lock m echanism is a device which has been specially designed to com pletely elim inate m icrowave radiation when the door is opened during operation, and thus to perfectly prevent the danger resulting from the leakage of microwave. (1) Prim ary interlock switch W hen the door is closed, the hook locks the oven door.
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) W hen checking the continuity of the switches, fuse or high voltage transform er, disconnect one lead wire from these parts and check continuity with the AC plug removed.
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TROUBLE SHOOTING GUIDE CON DITION CHECK RESULT CAUSE REM EDY R eplace C heck con tinuity of D efective O utlet has m agn etron C ontinuity m agn etron proper voltage Fuse does not blow. R eplace O pen pow er C heck con tinuity of pow er supply cord C ontinuity...
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TROUBLE SHOOTING GUIDE ( TROUBLE 3 ) No m icrowave oscillation even though fan m otor rotates. CON DITION CHECK RESULT CAUSE REM EDY Replace Continuity Defective N o m icrowave C heck continuity of high high voltage oscillation voltage capacitor transform er term inals w ith w ires rem oved...
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TROUBLE SHOOTING GUIDE ( TROUBLE 4 ) The following visual conditions indicate a probable defective touch control circuit or m em brane switch assem bly 1. Incom plete segm ents, 1) Segm ents m issing. 2) Partical segm ents m issing. 3) Digit flickering other than norm al display slight flickering.
MEASUREMENT AND TEST 1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT M icrowave output power can be checked by indirectly m easuring the tem perature rise of a certain am ount of water exposed to the m icrowave as directed below. PROCEDURE 1.
MEASUREMENT AND TEST 2. MICROWAVE RADIATION TEST CAUTION 1. M ake sure to check the m icrowave leakage before and after repair of adjustm ent. 2. Always start m easuring of an unknown field to assure safety for operating personnel from m icrowave energy. 3.
MEASUREMENT AND TEST 3. COMPONENT TEST PROCEDURE High voltage is present at the high voltage term inal of the high voltage transform er during any cooking cycle. It is neither necessary nor advisable to attem pt m easurem ent of the high voltage. Before touching any oven components or wiring, always unplug the oven from its power source and discharge the capacitor.
PRINTED CIRCUIT BOARD 1. CIRCUIT CHECK PROCEDURE 1. Low voltage transformer check The low voltage transform er is located on the P.C.B. M easuring condition: Input voltage: 120 V / Frequency: 60Hz Term inal Voltage LO AD N O LO A D 4 - 7 A C 12.6 V A C 14.7 V...
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PRINTED CIRCUIT BOARD M P1 M P2 Measure Point...
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PRINTED CIRCUIT BOARD 3. W hen there is no microwave oscillation 1) W hen touching START pad, oven lam p does not turn on. Fan m otor do not rotate, but cook indicator in display com es on. Cause : RELAY 2 does not operate. refer to Circuit Diagram ( Point 3) - Check m ethod POINT STATE...
Caution: In this Service 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) PRINTED CIRCUIT BOARD 3.
EXPLODED VIEW AND PARTS LIST 1. DOOR ASSEMBLY Refer to Disassem bly and assem bly. 2. CONTROL PANEL ASSEMBLY Refer to Disassem bly and assem bly. 3. TOTAL ASSEMBLY...
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Caution: In this Service 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) EXPLODED VIEW AND PARTS LIST PAR T CORD PART NAM E DESCRIPTION...
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Caution: In this Service 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) EXPLODED VIEW AND PARTS LIST PAR T CORD PART NAM E DESCRIPTION...
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