Daewoo Electronics 181GOA0A User's Manual
Contents
1. Wa FN 0 L OL ESY ars yi L l 6 6H zly r a INY p 20 1 nowej yesul ors 500 140 L OSM EZE 1 grs srs 15 ers zrs LPs rs p l M3dWnnr NOILO3T3S 9 cw a kM N9 L SI HOLSIS3M 804 30VLIVM G3YHVANN ONY zrs i I NX Le IF A F SI MOISIS3H 40 30NVH310L JHL 54 GS Thu 4887 ly ins n 310N 1001129 E 2 zl roa z ua S 9 4 8 6 wl I OZY 9 umo Pom d e v 9 fi ES l l g g 6 9 009 g g 1 HJMOd 090 olny 89212171 AIGO 96 MA SVL 15 9016 TEC ef Yanl e BA 54 I 9019 HSI4 BLINOd 1 ole N3HO1DI D 7 S gt Zi p p P Css 82 gy rol zo ollz gt HINNIQ i J3HVA L uli 92 O i 7 IS vzzid 1 ra 318V1353 381393 RURALI Sovea vsu 80980 1 gooot ja Su mum CE iazza re C TA ame lwo wo f O SENA d A2. 750 800 850 900 950 1000 1050 1100 23 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 Slowly approach the unit under test until the radiometer reads an appreciable microwave leakage from the unit under the test PROCEDURE 1 Prepare Microwave Energy Survey Meter 600cc glass beaker and glass thermometer 100 C 212 F 2 Pour 275cc 15cc of tap water initially at 20 x 5 C 68 x 9 F in SBE the 600 cc glass beaker with an inside diameter of approx 95 mm 3 5 in w Place it at the center of the tray and set it in a cavity IN Close the door and operate the oven e Measure the leakage by using Microwave Energy Survey Meter with dual ranges set to 2450MHz 1 Measured radiation leakage must not exceed the value prescribed below Leakage for a fully assembled oven with door normally closed must be less than 4mW cm2 2 When measuring the leakage always use the 5 cm 2 in space cone with probe Hold the probe perpen
3. K abhi SS SS RE i za ia va sa Y 2 2 i 9 N90 BPLYNI tore aa 010 8 dNYT NVH AVBL I c94 vl Y ji 1211 55 0 NM TAW 4 cit c aac MEE EE Sa a 59 Or 168 y nen I N9OIVED 7 ki NS ao NOVIN T ET 60 a 3 20 21 1 959 aoe rom 4 59 vb ee osy X 97 LAN T o bL 4 5 e I 7 8 1 9 5 MC ELS 29 o 09 9 gt lt 2 I q SQL M AL Ms 99 gu oT io D Z 12 pe UE Su cz ug 10m l mu L 056 98 4001 AL czy 8 sia 6 22 Old LLY oly 1 01 Occ LA I LA lo We Orc 74 Ro ee ee ee YS AE a ES 2 19 9 6l Zid L Orc 14 PE ZA roca 1 PZ ore cd N 2 LL Old 26 Lh i Oi ced yoz ng Occ tu 22 128 LO 203 NBOtYOZYdAL Lol 30 3 P C B LOCATION NO NO NAME SYMBOL SPECIFICATION PART CODE 1 BUZZER BZ1 BM 20K 3515600100 1 2 C ARRAY CA1 7P 6 102 M 50V CN6XB 102M 1 3 CAPA
4. Z AXIAL CCZF1H104Z 5 31 EXPLODED VIEW AND PARTS LIST 1 DOOR ASSEMBLY Refer to Disassembly and assembly 2 CONTROL PANEL ASSEMBLY Refer to Disassembly and assembly 3 TOTAL ASSEMBLY 32 PART CODE PART NAME DESCRIPTION Q TY w 3511715500 DOOR AS KOR 180A0A 1 3511715510 DOOR AS KOR 181G0A 1 BOO PKCPSWACOO CONTROL PANEL AS KOR 180A0A 1 PKCPSWAC50 CONTROL PANEL AS KOR 181G0A 1 F01 3510802400 CABINET SECC T0 6 1 F02 3516004100 SPECIAL SCREW T1 TRS LR4 POLE 4X10 SE MFZN 3 3516113100 CAVITY AS KOR 180A0A 1 3516112400 CAVITY JOINT AS KOR 180A0A 1 F04 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1 F05 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 2 F06 7122401011 SCREW TAPPING T1 TRS 4X10 MFZN 1 F07 35113TCN35 CORD POWER AS 3X16AWG 40X40 120 RTML 1 F08 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1 F09 FUSE 65TS 125V 20A 1 F10 7121403011 SCREW TAPPING T2S PAN 4X30 MFZN 2 F11 3963822200 MOTOR SHADED POLE 120V 30W OEM 15DWX1 B07 1 F12 3512522100 GUIDE WIND PP J640A 1 F13 3511800100 FAN PP 20 GLASS 1 F14 3518002900 MAGNETRON 2M218J MF P 1 F15 3516004000 SPECIAL SCREW T2 BOLT FLANGE 5X12 DACRO 1 F16 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN 1 F17 3513003200 HOLDER HV CAPACITOR SECC 0 6 1 F18 3518302200 CAPACITOR HV 2100VAC 0 98UF 187 1 F19
5. is properly installed and plugged into the electrical outlet Wattage output chart The power level is set by pressing the POWER pad The chart shows the display the power level and the percentage of power Touch POWER pad Power level Display Approximate Percentage of Power Once 100 Twice P 90 90 3 times P 80 80 4 times P 70 70 5 times P 60 60 6 times P 50 50 7 times P 40 40 8 times P 30 30 9 times P 20 20 10 times P 10 10 11 times P 00 0 10 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 Use an insulated screwdriver and wear rubber gloves when servicing the high voltage side 3 Discharge the high voltage capacitor before touching any oven components or wiring 1 Check the grounding Do not operate on a two wire extension cord The microwave oven is designed to be used while grounded It is imperative therefore to make sure it is grounded properly before beginning repair work 2 Warning about the electric charge in the high voltage capacitor For
6. 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 be overheated 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 Position the oven as far from them as possible 4 Away from heating appliances and water taps Keep the oven away from hot air steam or splash when choosing a place to position it or the insulation might be adversely affected and breakdowns occur 5 Power supply Check your local power source This microwave oven requires a current of approximately 3 amperes 120Volts 60Hz grounded outlet 1 A short power supply cord is provided to reduce the risks resulting from becoming entangled in or trippping over a longer cord 2 Longer cord sets or extension cords are available and may be used if care is exercised in their use 3 If a long cord or extension cord is used 1 The marked electrical rating of the cord set or extension cord should be at least as great as the electrical rating of the appliance 2 The extension cord must be a grounding type 3 wire cord 3 The longer cord should be arranged so that it will not drape over the counter top or tabletop where it can be pulled on by children or tripped over unintentionally 6 Examine the oven after
7. prior to release to the owner l rr rr fr rrr Hr frr rrr rrr er Hr Ir rrr Fr dr rH rH Hr Ir frr fr fer EE rrr rH Herd ji TABLE OF CONTENTS SAFETY 000240 3 FOR SAFE OPERATION E ok ian a A a a aara 3 FOR SAFE SERVICE PROCEDURES u rtr o ANEA EH Re Ed ini 3 SPECIFICATIONS owocu 4 EXTERNAL VIEW 5 OUTER DIMENSION mE 5 FEATURE DIAGRAM u aa AE AG a 6 GONTROLIPANEL EE 7 INSTALLATION A i aa dwa ddd ja a 8 OPERATIONS AND F NCTIONS u U U IL U L U TU uQ 9 DISASSEMBLY AND ASSMBLY irri ai wa we 10 INTERLOCK MECHANISM AND ADJUSTMEN TT A 17 TROUBLE SHOOTING GUIDE 1 ui da dy tatu aa ka da inan us De 18 MESUREMENT A 22 MEASUREMENT OF THE MICROWAVE POWER OUTPUT UU a emen 22
8. unpacking for any damage such as A misaligned door broken door or a dent in cavity If any of the above are visible DO NOT INSTALL and notify dealer immediately OPERATIONS AND FUNCTIONS N Connect the main lead to electrical outlet 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 Close the door securely 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 Each time a pad is touched a BEEP will sound to acknowledge the touch The oven automatically cook on full power unless set to a lower power level The display will show 0 when the oven is plugged in Time clock returns to the present time when the cooking time ends When the STOP CLEAR pad is touched during the oven operation the oven stops cooking and all information retained To erase all information except the present time touch the STOP CLEAR pad once more If the oven door is opened during the oven operation all information is retained 10 If the START pad is touched and the oven does not operate check the area between the door and door is closed securely The oven will not start cooking under the door is not completely closed or the program has not been reset Make sure the oven
9. 2 3 To remove door parts REF NO PART CODE PART NAME DESCRIPTION QTY REMARK 3512205100 1 KOR 180A A01 FRAME DOOR 3512203900 di 1 KOR 181G 3517007400 1 KOR 180A A02 Y ki 3517005320 BARRIER SCREEN O SAN T1 5 1 KOR 181G A03 3515204400 STOPPER HINGE T AS KOR 162J0A 1 A04 3511710500 DOOR PAINTING AS KOR 180A 1 A05 3517005200 BARRIER SCREEN I 70 1 1 06 3512301800 GASKET DOOR PP 1 A07 3513101400 HOOK POM 1 A08 3515101900 SPRING HOOK PW 1 1 Remove the spring and the hook Remove the barrier screen outer from door frame 13 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 Tighten two screws door to contact the door seal to oven front surface 2 reduce gap located part L Loosen two screws on stopper hinge under and then push the door to contact the door seal to oven front surface Tighten two screws NOTE A small gap may be acceptable if the microwave leakage does not exceed 4mW cme 14 5 To remove control panel parts REF PART CODE PART NAME DESCRIP
10. 3518400900 DIODE HV 1 F20 HARNESS B 1 F21 3518113800 TRANS HV DY N95A0 16T 1 F22 3516003800 SPECIAL SCREW T2 FLANGE 5X8 MFZN 4 F23 3510311800 BASE SBHG T0 7 1 F24 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 5 F25 3512101400 FOOT PP DASF 310 4 F26 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN 1 F27 3515202800 STOPPER HINGE U AS KOR 121M0A 1 F28 3512706110 HARNESS MAIN KOR 180A0A 1 F29 4415A17352 SW MICRO VP 533A OF SPNO 187 200G 1 F30 4415A66600 SW MICRO VP 532A OF SPNO 187 200G 1 F31 3518571000 SWITCH PUSH MP101C 1 F32 3513701300 LEVER LOCK POM 1 PART CODE PART NAME DESCRIPTION Q TY F33 3513814300 LOCK POM BLACK 1 F34 3513601500 LAMP BL 125V 25W T25 C5A 187 1 F35 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 1 F36 3966820200 MOTOR SYNCRO 120V 2W GM 16 12F17 1 F37 3518905300 THERMOSTAT OFF 75 ON 65 H 187 NB 1 F38 3513003400 HOLDER THERMOSTAT PBT 1 F39 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN 2 F40 3511406220 COVER WAVE GUIDE PP J640A WHITE 1 F41 3517400620 COUPLER 1 42 3514700710 ROLLER TEFRON 3 F43 3512517200 GUIDE ROLLER PP 1 F44 3517207700 TRAY GLASS 1 34 S M NO R180A0A002 DAEWOO 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 DEC 2001
11. 5 180 0 002 Service Manual Microwave Oven Model KOR 180A0A KOR 181G0A DAEWOO ELECTRONICS CO LIDE http svc dwe co kr EIECEEECEFEEECEEECEEEEEECEEECEEEEEFEEECEEEEEEEEEECEEEEEECEFEEEECEGEEEEECEEEEEEEEECEEEEEECEEFEEEEEEIFI E 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 el E 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 m Seal and sealing surfaces arcing wear and other damage 4 Damage to or loosening of hinges and latches 5 Evidence of dropping or abuse c Before turning on power to the microwave oven for any service test or inspection within the microwave generating compartments check the magnetron wave guide or transmission line and cavity for proper E alignment integrity and connections 8 d Any defective or misadjusted components in the interlock monitor door seal and microwave generation and transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is released to the owner e A microwave leakage check to verify compliance with the Federal performance standard should be performed on each oven
12. CH MAY RADIATE FROM THE MAGNETRON OR OTHER MICROWAVE GENERATING DEVICE IF IT IS IMPROPERLY USED OR CONNECTED ALL INPUT AND OUTPUT MICROWAVE CONNECTIONS WAVEGUIDES FLANGES AND GASKETS MUST BE SECURED NEVER OPERATE THE DEVICE WITHOUT A MICROWAVE ENERGY ABSORBING LOAD ATTACHED NEVER LOOK INTO AN OPEN WAVEGUIDE OR ANTENNA WHILE THE DEVICE IS ENERGIZED SPECIFICATIONS MODEL KOR 180A KOR 181G POWER SUPPLY 120V 60HZ SINGLE PHASE WITH EARTHING MICROWAVE 1500 W PONER GRILL ee A COMBINATION MICROWAVE ENERGY OUTPUT 1100 W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS W X H X D 589X339X488mm 23 2X13 3X19 2 in CAVITY DIMENSIONS W X H X D 399X278X451mm 15 7X10 9X17 8 in NET WEIGHT APPROX 18kg 39 7 Ibs TIMER 99min 99sec FUNCTION SELECTIONS MICROWAVE POWER SELECTIONS 10 LEVELS CAVITY VOLUME 1 8 Cu Ft Specifications are subject to change without notice EXTERNAL VIEW 1 OUTER DIMENSION 589 2 FEATURE DIAGRAM 1 DOOR SEAL Door seal maintains the microwave within the oven cavity and prevents microwave leakage 2 DOOR HOOK When door is closed it will automatically lock shut If door is opened while oven is operating magnetron
13. CITOR ELEC EC1 50V RS 1HF CEXE1H109V 1 4 CPAPCITOR ELEC EC2 25V RSS 1000 F CEXF1E102V 1 5 CONNECTOR WAFER CN1 YW396 02AV 3519150520 1 6 CONNECTOR WAFER CN3 YW396 05AV 3519150510 1 7 CONNECTOR WAFER CN2 FCZ 254 11 441M367160 1 8 DIODE RECTIFY 01 6 9 12 15 1N4148 DZN4148 11 9 DIODE RECTIFY D13 14 1N4004A DZN4004A 2 10 DIODE ZENER 201 UZ 5 1BSB DZUZ5R1BSB 1 11 DIODE ZENER 702 UZ 3 9BSB DZUZ3R9BSB 1 12 LED DISPLAY DP1 DDG 631H DDDG631H01 1 13 PCB MAIN M158 81 5X139 9 3514315410 1 14 R ARRAY RA1 7P 6 1 8 100K J RA 87X104J 1 15 RESISTOR R1 R7 1 6W 220 5 RD AZ221J 7 16 RESISTOR R8 10 12 14 22 1 6W 1K 5 RD AZ102J 5 17 RESISTOR R11 20 21 1 6W 100K 5 RD AZ104J 3 18 RESISTOR R13 1 6W 200 5 RD AZ201J 1 19 RESISTOR R15 16 1 6W 10K 5 RD AZ103J 3 20 RESISTOR R17 1 6W 510 5 RD AZ511J 1 21 RESISTOR R18 1 6W 1M 5 RD AZ105J 1 22 RESISTOR R19 1 4W 51 5 RD 4Z510J 1 23 REGULATOR VL1 MC7905C 1MC7905C 1 24 TRANSISTOR Q1 5 9 11 KRA 106M TZRA106M 8 25 TRANSISTOR Q6 KTA 1266Y TZTA1266Y 1 26 TRANS POWER LVT1 DMR 631P 5EPU035302 1 27 WIRE COPPER 1 3 5 8 10 12 17 21 1 0 52 TIN COATING 85801052GY 15 28 WIRE COPPER SJ3 5 1 0 52 TIN COATING 85801052GY 29 IC MICOM TMP47C440BN NG14 13GS1A1AGHO 1 30 RESONATOR CERA CR1 KBR 4 0MSTF 5PKBR40MKS 1 31 SW RELAY RY1 G5G 1A DC 12V 55 0101121 2 32 SW RELAY RY2 CS11 12SH 1C 1P 55 0101128 1 33 C6 102 50V Z AXIAL CCZB1H102K 1 34 CAPACITOR CERA C1 C3 C5 C7 104 50V
14. ERATOR 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 The door gasket plate and oven cavity surface should be kept clean No grease soil or spatter should be allowed to build up on these surfaces or inside the oven DO NOT ATTEMPT TO OPERATE THIS APPLIANCE WITH THE DOOR OPEN The microwave oven has concealed switches to make sure the power is turned off when the door is opened Do not attempt to defeat them DO NOT ATTEMPT TO SERVICE THIS APPLIANCE UNTIL YOU HAVE READ THIS SERVICE MANUAL 2 FOR SAFE SERVICE PROCEDURES 1 If the oven is operative prior to servicing a microwave emission check should be performed prior to servicing the oven 2 If any certified oven unit is found to servicing a microwave emission check should be performed prior to servicing the oven a inform the manufacturer importer or assembler b repair the unit at no cost to the owner c attempt to ascertain the cause of the excessive leakage d tell the owner of the unit not to use the unit until the oven has been brought into compliance 3 If the oven operates with the door open the service person should tell the user not to operate the oven and contact the manufacturer and CDRH immediately CAUTION MICROWAVE RADIATION PERSONNEL SHOULD NOT BE EXPOSED TO THE MICROWAVE ENERGY WHI
15. MICROWAVE RADIATION TEST nr tertii rn gera ce raton rto n Font YE 23 COMPONENT TEST PROCEDURE efi prt reet rre eet eerie reb inei A A Ft 24 WIRING DIAGRAM er X 25 PRINTED CIRCUIT BOARD l eta a gute 26 CIRCUIT CHECK PROCEDURE 2 eri pe acera s nn don dash tane ceat 26 PCB CIRCUIT DIAGRAM Awa 29 P C Bic LOGATIONINO LIE 30 EXPLODED VIEW AND PARTS LIST iii ie a o uu 31 DOOFRASSENBIY S Sau e EN et nd Q PA ada 31 CONTROL PANEL ASSEMBLY L uuu daria a rarae ee rn Fera ote t nre ena iv diva ede Pea sss 31 TOTAL ASSEMBLY 5 n et n ert e E aq e tke RR da Wad kaa eda sane 31 SAFETY AND PRECAUTIONS CAUTION This Device is to be Serviced Only by Properly Qualified Service Personnel 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 IF ANY OF THE FOLLOWING CONDITIONS EXIST OP
16. TION QTY REMARK 3518522800 KOR 180A0A 1 201 SWITCH MEMBRANE ADI 3518522810 KOR 181G2A 1 3516726000 1 KOR 180A ABS AF 348 VT 0826 fee 3516719100 CONTROL PANEL 1 KOR 180G 5 00 PCB AS KOR 161G2A 1 A04 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 4 A05 3513702800 LEVER DOOR OPEN PP 1 A06 441G430171 BUTTON SPRING SWP DIA 0 7 1 A07 3516909600 BUTTON DOOR OPEN ABS AF 348 VT 0826 1 Remove four screws which secure the PCB assembly to control panel Detach membrane from the control panel Remove door open button and button spring from the control panel 1 2 3 4 Disconnect membrane tail from the connector of the PCB assembly 5 6 7 15 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 NOTE Never install the magnetron without the metallic gasket plate which is packed with each magnetron to prevent microwave leakage Whenever repair work is carried out on magnetron check the microwave leakage It shall not exceed 4mW cme for a fully assembled oven with door normally closed Wave guide Magn
17. about 30 seconds after the operation has stopped electric charge remains in the high voltage capacitor When replacing or checking parts short between oven chassis and the negative high terminal of the high voltage capacitor by using a properly insulated screwdriver to discharge 4 When the 20A fuse is blown due to the operation of the monitor switch replace primary interlock switch secondary interlock switch and interlock monitor switch 5 After repair or replacement of parts make sure that the screws are properly tightened and all electrical connections are tightened 6 Do not operate without cabinet CAUTION Service personnel should remove their watches whenever working close to or replacing the magnetron WARNING When servicing the appliance take care when touching or replacing high potential parts because of electrical shock or exposing microwave These parts are as follows HV Transformer Magnetron HV Capacitor HV Diode 11 1 To remove cabinet pm P di 7 A 1 Remove three screws on cabinet back d Mer 2 Push the cabinet backward see Ka a a 2 To remove door 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 reassembly NOTE After replacing the door assembly perform a check of correct alignment with the hinge and cavity front plate 1
18. ad is touched 11 Oven lamp and turntable motor do not stop although cooking is finished Check if the RELAY 2 contacts close if they are close replace touch control circuit CONDITION CHECK RESULT CAUSE REMEDY Display does Check rach pad for rl uel Malfunction Replace not show continuity of the membrane of touch control box programming keyboard for the following control circuit sub assembly at all even if keyboard check procedure of control box keyboard is sub assembly touched Abnormal gt Malfunction gt Replace the of the membrane membrane keyboard keyboard NOTE Before following the particular steps listed above in the trouble shooting guide for the membrane keyboard s failure please check for the continuity of each wire harness between the membrane keyboard and assembly 22 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 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 The water is contained a cylindrical borosilicate glass vessel having a maximum material thi
19. ckness of 3 mm and an outside diameter of approximately 190 mm 3 The oven and the empty vessel are at ambient temperature prior to the start of the test The initial temperature of the water is 10 2 C 50 3 6 F If is measured immediately before the water is added to the vessel After addition of the water to the vessel the load is immediately placed on the center of the shelf which is in the lowest normal position 4 Microwave power is switched on Heating time should be exactly A seconds Refer to table as following Heating time is measured while the microwave generator is operating at full power The filament heat up time for magnetron is not included 6 The initial and final temperature of water is selected so that the maximum difference between the ambient and final water temperature is 5K 7 The microwave power output P in watts is calculated from the following formula P 4187 X AT t AT is difference between initial and ending temperature tis the heating time The power measured be B Refer to SPECIFICATIONS W 10 0 96 CAUTION 1 Water load should be measured exactly to 1 liter 2 Input power voltage should be exactly specified voltage Refer to SPECIFICATIONS 3 Ambient temperature should be 20 2 C 68 3 6 F Heating time for power output A second 70 64 60 56 52 49 47 44 42 40 38 B W 600 650 700
20. d to remove time from cooking Auto Defrost Used to defrost foods for weight 8 Power Used to set power level 9 Defrost Used to defrost foods for time 10 Kitchen Timer Used as a minute timer delay cooking hold setting after cooking 11 Clock Used to set clock 12 Stop Clear Used to stop the oven operation or to delete the cooking data 13 Start Easy cook Used to start the oven and also used to set a reheat time 2 KOR 181G0A M W DEF LOCK Ib DAEWOO MICROWAVE OVEN KOR 181G 3 BAKED POTATO 4 FRESH VEGETABLE 5 FROZEN VEGETABLE STOP START CLEAR SPEEDY COOK 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 Defrost Used to defrost foods for time 10 Kitchen Timer Used as a minute timer delay cooking hold setting after cooking 11 Clock Used to set clock 12 Stop Clear Used to stop the oven operation or to delete the cooking data 13 Start Easy cook Used to start the oven and also used to set a reheat time INSTALLATION 1 Steady flat location This microwave
21. dicular to the cabinet and door Place the space cone of the probe on the door cabinet door seem door viewing screen the exhaust air vents and the suction air vents 3 Measuring should be in a counter clockwise direction at a rate of 1 in sec If the leakage of the cabinet door seem is unknown move the probe more slowly 4 When measuring near a corner of the door keep the probe perpendicular to the areas making sure the probe end at the base of the cone does not get closer than 2 in from any metal If it does not erroneous reading may result 24 3 COMPONENT TEST PROCEDURE High voltage is present at the high voltage terminal of the high voltage transformer during any cooking cycle t 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 High voltage transformer 1 Remove connections from the transformer terminals and check continuity 2 Normal readings should be as follows Secondary winding Approx 110 9 10 Filament winding Approx 0 9 Primary winding Approx 19 High voltage capacitor 1 Check continuity of capacitor with meter on the highest OHM scale 2 A normal capacitor will show continuity for a short time and then indicate 10M 9 once the capacitor charged 3 A shorted capacitor will show continuous continuity 4 An op
22. e oven lamp switch do not turn on Check continuity of secondary No gt Malfunction of gt Adjust or interlock switch Continuity secondary replace interlock switch Check D C voltage being 0 gt Defective touch Replace supplied to RELAY RY2 coil control circuit Approx gt Faulty contacts off gt Papasa 15 VDC RELAY RY2 or open relay coil 20 TROUBLE 3 No microwave oscillation even though fan motor rotates CONDITION CHECK RESULT CAUSE REMEDY gt m Continuity h microwave Check continuity of high y Defective high Replace oscillation voltage capacitor terminals voltage with wires removed transformer Check continuity of high voltage gt Continuity in Defective high gt Replace rectifier in forward and backward backward voltage rectifier direction with DC megger direction Connect megger leads to gt Continuity R Defective gt Replace magnetron terminal and magnetron magnetron body Check resistance of primary and gt 0R orl gt Defective high gt Replace secondary coil of high voltage voltage transformer transformer NE gt No Replace Check continuity of magnetron Continui
23. e lead Normal gt Defective high RER wire connected form high voltage capacitor voltage transformer to the high voltage capacitor and operate Regi em Fuse again Defectivehigh gt blows voltage transformer 19 CONDITION CHECK RESULT CAUSE REMEDY I Replace Outlet has Dr No Defective proper 39 Check continuity of magnetron gt Continuity ro magnetron voltage Fuse does not blow gt Check continuity of gt Replace power supply cord Continuity supply cord Normal r gt m Replace Defective touch control circuit Display do not shown Malfunction of Replace countdown secondary interlock switch NOTE1 All these switches must be replaced at the same time please refer to Interlock Mechanism And Adjustment TROUBLE 2 Display shows all figures selected but oven does not start cooking even though desired program and time are set and start pad is tapped CONDITION CHECK RESULT CAUSE REMEDY Turntable _ Check continuity of primary No j Malfunction of j Adjust or motor and interlock switch Continuity primary interlock replac
24. en capacitor will show constant 10M 9 5 Resistance between each terminal and chassis should be infinite High voltage diode 1 Isolate the diode from the circuit by disconnecting the leads 2 With the ohmmeter set on the highest resistance scale measure the resistance across the diode terminals Reverse the meter leads and again observe the resistance reading Meter with 6V 9V or higher voltage batteries should be used to check the front back resistance of the diode otherwise an infinite resistance may be read in both directions A normal diode s resistance will be infinite in one direction and several hundred in the other direction Magnetron For complete magnetron diagnosis refer to Measurement of the Microwave Power Output Continuity checks can only indicate and open filament or a shorted magnetron To diagnose for an open filament or a shorted magnetron 1 Isolate magnetron from the circuit by disconnecting the leads 2 A continuity check across magnetron filament terminals should indicate 0 1 or less 3 A continuity check between each filament terminal and magnetron case should read open Fuse If the fuse in the primary and monitor switch circuit is blown when the door is opened check the primary and monitor switch before replacing the blown fuse In case the fuse is blown by an improper switch operation replace the defective switch and fuse at the same time Replace just the fuse if the switches operate norma
25. etron antenna taj Metallic Magnetron antenna gasket plate Filament terminal lt MAGNETRON gt Metallic gasket plate 16 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 transformer 1 Remove four screws holding the H V transformer 2 Remove the H V transformer 3 Reverse the above steps for reassembly 17 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 aoe 46 ma BK FRONT PLATE PRIMARY WH INTERLOCK SWITCH GY INTERLOCK MONITOR SWITCH BUTTON SECONDARY INTERLOCK SWITCH MOUNTING SCREW LOCK LEVER WH WHITE BK BLACK RD RED GY GRAY CN GREEN BL BLUE 1 Primary interlock
26. lly 25 WIRING DIAGRAM 28 3 0 10 900 MOLON 30 39 NO X SOD 4000 YOLON NA Ne W WHA HA 70 DWA GY QW JON HOLIMS X00T41NI AUVKINO0JS WALLON usus KOLMS 9 HOLINON WOTHALNI M W NO TIONS I 310906 AMOd ay 8 W i IVISOMBHL IVISONHMHI 3NLYA NOWLANOVN YOO MAIN AWN 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 120V Frequency 60Hz Terminal Voltage LOAD NO LOAD 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 Voltage Check Key check point NO CHECK POINT REMARK 1 IC1 PIN 2 21 30 34 5VDC 2 IC1 PIN 35 16 67ms 60Hz 3 PIN 31 OR 32 Wy 9V L T T 250 ns 4MHz Check method NO MEASURE POINT WAVE FORM REMEDY REMARK 1 MP1 DC 5V 0 25V Replace VL1 EC1 NO LOAD 2 MP2 DC 12V 2 0V Replace EC2 D12 13 14 NO LOAD NOTE Each measure p
27. oint must be measured with GND points 27 Mesure point 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 STATE A 2 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 refer to Circuit Diagram point 2 Check method POINT STATE A E RELAY 1 ON 5VDC GND RELAY 1 OFF GND 12VDC 4 When the door is opened during operation the count down timer does not stop refer to Circuit Diagram point 1 Check method POINT STATE A 2 1 DOOR OPEN OPEN 5VDC 2 DOOR CLOSED CLOSE GND CHECK NO HETHOD REMEDY 1 Check the stage ON OFF of the secondary interlock Replace door open monitor switch switch by resistance measurement 5 When the digital clock does not operate properly refer to Circuit Diagram point 5 POINT WAVE FORM OV E 4 A 5V 16 67 ms 60Hz If clock does not keep exact time you must check resistor R15 16 zener diode ZD1 29 2 PCB CIRCUIT DIAGRAM LA 42 PYOOL 8 1 9 d
28. power cord is not inserted the wall outlet Check grounding before trouble checking Be careful of the high voltage circuit Discharge the high voltage capacitor 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 Check wire harness wiring and connection of the terminals and power cord before check the parts listed below TROUBLE 1 Oven does not operate at all any inputs can not be accepted CONDITION CHECK RESULT CAUSE REMEDY Fuse blows m Replace Check continuity of interlock gt Continuity Mallunejion el interlock NOTE 1 monitor switch with door closed n monitor switch No Continuity Replace fuse Check continuity of of primary Shorted F interlock switch contact with door Continuity contacts of Replace partially open until interlock primary NOTE 1 monitor switch contact close interlock switch Check continuity of primary gp a ae gt Defective low of low voltage Approx 5 ransformer 150 210 ransformer normal Disconnect one side of th
29. switch When the door is closed the hook locks the oven door If the door is not closed properly the oven will not operate When the door is closed the hook pushes the button of the microswitch Then the button of the primary interlock switch bring it under ON condition 2 Secondary interlock switch and interlock monitor switch When the door is closed the hook pushes the lock lever downward The lock lever presses the button of the interlock monitor switch to bring it under NO condition The lock lever presses the button of the secondary interlock switch to bring it under ON condition ADJUSTMENT Interlock monitor switch When the door is closed the interlock monitor switch should be changed NO condition before other switches are closed When the door is opened the interlock monitor switch should be changed NC condition after other switches are opened 3 Adjustment steps 8 Loosen the one mounting screw b Adjust interlock switch assembly position c Make sure that lock lever moves smoothly after adjustment is completed d Tighten completely two mounting screws NOTE Microwave emission test should be performed after adjusting interlock mechanism If the microwave emission exceed 4mW cm2 readjust interlock mechanism 18 TROUBLE SHOOTING GUIDE Following the procedure below to check if the oven is defective or not Swe DH Na 1 2 3 4 your meter NOTE When electric parts are checked be sure the
30. 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 OVEN LAMP Automatically turns on during oven operating 6 SAFETY INTERLOCK SYSTEM 7 CONTROL PANEL 8 GLASS COOKING TRAY Made of special heat resisant glass The tray must always be in proper position before operating Do not cook food directly on the tray 9 OVEN FRONT PLATE 10 DOOR OPENING BUTTON To open the door push the door opening button When door is closed it will automatically lock shut If door is opened while oven is operating magnetron tube will immediately stop operating 11 ROLLER GUIDE Supports the glass cooking tray 3 CONTROL PANEL 1 KOR 180A0A DAEWOO KOR 180A0A MW DEF TIMER LOCK Ib 1 Bread 2 Soul 3 Baked Potato AUTO 4 Fresh Vegetable COOK 5 Frozen Vegetable POWER BEVERAGE POPCORN DINNER FROZEN DEFROST PLATE PIZZA MEAT FISH POULTRY w os g LESS 4 START STOP CLEAR EASY COOK Time set pad Used to set the cooking time and the present time Display Cooking time power level indicators and present time are displayed One touch Used to cook or reheat specific quantities of food Auto cook Used to cook or reheat 1 2 3 4 5 More Used to add time to cooking 6 Less Use
31. ty Defective with wires removed magnetron Check continuity of filament gt Defective high gt Replace terminal of high voltage Continuity voltage transformer transformer gt OV Repi Check D C voltage being Defective touch PER supplied to RELAY RY1 coil control circuit gt Faulty Replace 15 VDC contacts or RELAY RY1 or open relay coil 21 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 f HB B88 0 does not display when power is on Z VV VY Y M W DEF TIMER LOCK 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 Display indicates a number different from one touched 5 Specific numbers for example 2 or 3 will not display when the panel is touched 6 Display does not count down or up with time cooking or clock operation 7 Oven is programmable and cooks normally but no display shows 8 Display obviously jumps in time while counting down 9 Display counts down noticeable too fast while cooking 10 Display does not show the time of day when the clear p
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