Service Manual
Contents
1. lA f 2 0 149 96 5021086 5210 6 008 1935 ogox S011086 S110 6 00 13001 avis mE NOL 201 1 IZA OINO T ALON 9 0 ki 6 14 0495 98 2 1 IA 1118 191805 5 D 201 Ig ALZ A D 013 YL 028 1 4 v ACL A O 1 5 2 ONO G 1 c YOL LY ALY 1089101 E 3 HN S AOLZ LW AG 90108 94 EYA 215 C T 20101 1439 01 110 2018 901084 ary 6 10101 6 OL 3 o 8 My VAL LOLY PPOLXLOIOM 3 uou 9 10 7 5 7 ipttttttf i Mia 99 g 8 05 EM EA E gi gt AVSI 67 82 0801 99 29 pr 531 01 3 0 soims 90105 9 6 HAT WW eS 22 01195 20145 SOLMS 3 LA p 23 VXZOOVNL nivis AB 01 014 207 AOS ASE 6 OMS 2 YOON 6C 17060 L gq SSA 03 d 2 le WER A a 2 60148 10 18 010 6 010 IAL2. REF NO PART CODE PART NAME DESCRIPTION Q TY REMARK F39 3517302500 FOAM CR 107 180 30 1 40 3518002400 MAGNETRON 2M 218J 1 41 75427 40A1 SCREW SPECIAL TT2 HEX FG 4 10 SE MFZN 3 42 3511800100 6 20 1 F43 3512505200 GUIDE WIND PP 1 F44 3963513000 MOTOR SHADED POLE 230V 25W OEM 15DWC2 A03 1 45 1112403011 SCREW TAPPING T2S PAN 4 30 MFZN 2 F46 7122401211 SCREW TAPPING T2S TRS 4 12 MFZN 1 47 3518604600 NOISE FILTER DWLF P KOC980T105 1 3518605500 NOISE FILTER DWLF MO7 KOC980T205 1 T 4417B67600 FUSE 15A 250V KOC980T105 1 5F1CD1232M FUSE 12A 250V KOC980T205 1 F49 7112401011 SCREW TAPPING T1TRS 4 10 MFZN 1 E50 35 505 CORD POWER AS 3 1 5 KOC980T10S 1 35113A5QM5 CORD POWER AS 3 1 0 KOC980T 20S 1 F51 7112401011 SCREW TAPPING TI TRS 4 10 MFZN 2 F52 1542 7 40 1 SCREW SPECIAL TT2 HEX FG 4 10 SE MFZN 2 F53 3512505500 GUIDE AIR OUTLET SA1D 80T0 5 1 54 7112401011 SCREW TAPPING TI TRS 4 10 MFZN 1 F55 3511404800 COVER INSULATOR SECC T0 5 1 F56 7112401011 SCREW TAPPING TI TRS 4 10 MFZN 1 F57 3510801000 CABINET PCM T0 5 1 F58 7112401011 SCREW TAPPING T1TRS 4510 MFZN 4 F59 3512513000 GUIDE TRAY AS KOC 971C05 1 F60 3517205200 TRAY METAL SPP TO 6 1 F61 3514800800 SENSOR TEMPERATURE PTM K312 D4 1 F62 7113400814 SCREW TAPPING T1BIN 4 8 MFNI 1 F63 3518700220 FUSE HV 5KV 0 7A 1 F64 3511401300 COVER INSULATOR 58 SBHG 1 0 6
3. 44 34 PART CODE PART NAME EXPLODED VIEWS AND PARTS LIST DESCRIPTION REMARK 3510603610 BRACKET HEATER T SECC 0 6 15312 40 1 SCREW SPECIAL TT2 HEX FG 4 10 MFZN 3512803000 HEATER MIRACLON 115V 550W 3512765100 HARNESS HEATER 187 FLAG 65MM 3517302500 FOAM CR 10T 180 30 3518002400 MAGNETRON 2M 218J 7S427W40A1 SCREW SPECIAL TT2 HEX FG 4 10 SE MFZN 3511800100 FAN PP GF20 3512505200 GUIDE WIND PP 3963513000 MOTOR SHADED POLE 230V25W OEM 15DWC2 A03 7121403011 SCREW TAPPING 125 4 30 MFZN 75 3414 4081 SCREW SPECIAL 125 4 12 PW SE MFZN 3518604600 NOISE FILTER DWLF P KOC 970T15 3518605500 NOISE FILTER DWLF MO7 KOC 970T25 4417867600 FUSE 15A 250 970115 5F1CD1232M FUSE 12A 250 0 970725 15312 40 1 SCREW SPECIAL TiTRS 4 10 SE MFZN 351134505 CORD POWER AS 3 1 5 KOC 970T1S 35113A5QM5 CORD POWER AS 3 1 0 KOC 970T2S 15312 40 1 SCREW SPECIAL 1 5 4 10 SE MFZN 15427 40 1 SCREW SPECIAL TT2 FG 4 10 SE MFZN 3512505500 GUIDE AIR OUTLET
4. CHECK RESULT CAUSE REMEDY Check continuity of No Malfunction Adjust or primary interlock switch Continuity of primary Replace interlock switch Check continuity of No Malfunction Adjust or secondary interlock switch Continuity of secondary Replace interlock switch Check continuity of No Defective gt Replace heater Continuity heater Check D C voltage ML 0V m Defective Replace being supplied to touch control RELAY RY2 coil circuit Approx Faulty gt Replace 12 VDC contacts of RELAY RY2 oropen relay coil 20 TROUBLE 3 No microwave oscillation even though fan motor rotates CONDITION No microwave oscillation TROUBLE SHOOTING GUIDE CHECK RESULT CAUSE REMEDY Check continuity of high No voltage fuse Continuity Replace high voltage fuse Check continuity of high gt Continuity gt Defective Replace voltage capacitor high voltage terminals with wires transformer removed Check continuity of high gt Continuity Defective Replace voltage rectifier in backward high voltage gt forward and backward direction rectifier direction with DC megger
5. CAVITY VOLUME 1 0 CuFt MODEL 980 105 98 205 POWER SUPPLY 230V 50Hz 230V 50Hz MICROWAVE 1450W 1450W GRILL 1200W 1200W POWER CONSUMPTION CONVECTION 1550W 1550W AUTO COOK 1850W 1850W COMBINATION 2600W Simultaneous 1550W Sequential MICROWAVE ENERGY OUTPUT 1000W IE 705 1000W 705 MICROWAVE FREQUENCY 2450MHz 2450MHz OUTSIDE DIMENSIONS W XH X D 526 x 345 x 482 mm 20 7 x 13 6 x 19 0 in CAVITY DIMENSIONS W X H X D 335 x 250 339 mm 13 2 x 9 8 x 13 3 in NET WEIGHT APPROX 21Kg 46 3 Ibs TIMER 60 minutes FUNCTION SELECTIONS MICROWAVE GRILL CONVECTION COMBI POWER SELECTIONS 10 LEVELS CAVITY VOLUME 1 0 CuFt SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE EXTERNAL VIEW 1 OUTER DIMENSION KOC 970T 15 ows o x s 526 412 Fig 1 Front view Fig 2 Side view KOC980T i u En O S a 15 349 234 526 482 Fig 1 Front view Fig 2 Side view EXTERNAL VIEW 2 FEATURE DIAGRAM KOC 970T 2 1 Door sea
6. Magnetron antenna Wave guide Magnetron antenna t v 5 gasket plate 2 0 INS m 17 Metallic gasket plate 12 DISASSEMBLY AND ASSEM BLY 6 To remove control panel assembly 1 Remove a screw which secure the control panel assembly to the oven front plate At the same time draw forward the control panel assembly from the oven front plate 2 Remove the dial knob 3 Remove nine screws which secure the main and sub PCB assembly to control panel 4 Remove buttons 5 Remove the window display and decorator panel PART CODE PART NAME DESCRIPTION REMARK 3511602400 DECORATOR C PANEL ABS 3515501200 WINDOW DISPLAY PMMA IF 850 SMOG 3516715110 CONTROL PANEL ABS 3516906000 BUTTON FUNCTION ABS 3516905900 BUTTON FUNCTION ABS KOR 816 3516905800 BUTTON START ABS KOR 816 3516906100 BUTTON FUNCTION ABS PKBPMSQ200 PCB SUB AS KOC 970T 980T PKMPMSQ200 PCB MAIN AS 970 15 50230 5 970125 5 00 PCB MAIN AS KOC980T105 5 00 5 KOC980T205 7121300811 SCREW TAPPING 125 PAN 3x8 MFZN 3513403810 KNOB VOLUME 13 ABS
7. 3 EXTERNAL VIEW Re 4 1 OUTER DIMENSION isset tH IK an 4 2 FEATURE DIAGRAM e a 5 INSTALLATION m 7 CONTROL PANEL u I intu Rd se Masi E 8 DISASSEMBLY AND ASSEMBLY U dabis Forno ei u u 9 INTERLOCK MECHANISM AND ADJUSTMENT U U 18 TROUBLE SHOOTING GUIDES Su 19 MEASUREMENT AND TEST 25 1 MEASUREMENT OF THE MICROWAVE POWER OUTPUT dried erii 25 2 ELECTRICAL CONTINUITY CHECK OF INTERLOCK SWITCH 26 3 MICROWAVE RADIATION TEST SQUE haqa ru 2 T COMPONENT TEST PROCEDURE durat bcn blc n osi Oda it M RR reu 28 WIRING DIAGRAM eee 29 SCHEMATIC DIAGRAM ER RU GI E uvereni UD CD 30 EXPLODED VIEWS AND PARTS LIST ressent uuu u 33 PRINTED WIRING BOARD 39 P C B CIRCUIT DIAGRAM n 5555855 cipi tacens peser UE EFE E a Sera RE 44 1 SAFEIY 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 cau
8. KOR 816 DISASSEMBLY AND ASSEM BLY 7 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 steps for reassembly NOTE After replacing the door assembly perform a check of correct alignment with the hinge and cavity front plate 8 To remove door parts 1 Remove the gasket door 2 Remove two screws 3 Remove the door seal assy 4 Remove the hook and spring 5 Remove the supporter and barrier screen o 6 Remove the handle from the frame door PART CODE PART NAME DESCRIPTION REMARK 3512203320 FRAME DOOR ABS 3512601400 HANDLE DOOR ABS 3517004020 BARRIER SCREEN 0 TEMPERED GLASS T32 3515304700 SUPPORTER BARR S 0 NYLON 66 3511708400 DOOR SEAL AS K0C 971C 3513101100 HOOK POM 3515101300 SPRING HOOK PW1 3515203600 STOPPER HINGE T AS 970 15 7121400811 SCREW TAPPING 125 PAN 4x8 MFZN 3512300800 GASKET DOOR 14 PBT e DISASSEMBLY AND ASSEM BLY 9 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 gt lt c the door to contact the door seal to oven front surface e Tighten two sc
9. SDB161VB17F 1 2 36 36P C PITCH5 46 5510109002 S M NO 970 15001 DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P 0 BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC E mail G7F 00E Q web dwe co kr FAX 02 360 8184 TEL 02 360 8178 8182 PRINTED DATE JUL 19988
10. ZD2 075 68 DZTZ5R6B DIODE ZENER ZD3 MTZ 278 DZTZ21B DIODE ZENER 204 MTZ 4 78 0217248 78 C ELECTRO ECI RS 50V 1008 CEXE1H100A C ELECTRO 4 RSS 35V 100048 CEXF1V102V C ELECTRO EC2 EC3 RSS 50V 220uF CEXF1H221V C ARRAY 8 7 50 1000 CN7XB 102M C CERA AXIAL 1 4 5 9 12 14 50V 0 1uFZ 1 1047 C CERA AXIAL C10 11 H1KF 50V 1000 2 CCZB1H102Z C CERA AXIAL 2 3 50V 0 47uF 1 4737 45 P C B CIRCUIT DIAGRAM NAME SYMBOL SPECIFCATION PART CODE CONNECTOR WAFER CN2 35312 0310 30166M5030 CONNECTOR WAFER 35313 0210 30166 7020 CONNECTOR CN4 35328 0610 4CW3061M X0 CONNECTOR FILM CN3 155 1 4CW215SBD0 TRANSISTOR Q1 2 10 KTA1270Y TZTA1270Y TRANSISTOR Q6 9 11 KRA102M TZRA102M TRANSISTOR 03 4 KRC102M TZRC102M RELAY RY2 RY3 65 1 TP M DT 12 55C0101112 RELAY RY4 6 G5B 1 12V 55C0101110 R ARRAY RA1 RA3 8P 7 1 8 100K RA 88X104 CONNECTOR FILM CN101 HLEMI5R 1 4CW21RBDO CO me oy Ww SW 5W101 112 KPT 1115AM 5550101293 SW ROTARY EN101
11. CONDITION CHECK 1 Under heater is not heated 2 Convection fan and motor does not rotate I Check continuity of primary interlock switch EL Check continuity of secondary interlock switch gt Check continuity of heater motor Check D C voltage being supplied to RELAY coil RESULT CAUSE REMEDY Malfunction Adjustor Continuity of primary replace interlock switch No Malfunction Adjust or Continuity of secondary replace interlock and D O M switch gt 0 Defective Replace touch control circuit Approx Faulty Replace 13VDC contacts of RELAY RY 4 or open relay coil RESULT CAUSE REMEDY Malfunction Adjustor Continuity of primary replace interlock switch No Malfunction Adjustor Continuity of secondary replace interlock switch No D efective Replace Continuity heater motor 0v Defective Replace touch control circuit Approx Faulty Replace 13 VDC contacts of RELAY RY 6 or open relay coil 22 TROUBLE SHOOTING GUIDE TROUBLE 6 The following visual conditions indicate a probable defective touch control circuit or button P C B assembly 1 Incomplete segments 1 Segments missing 2 Partial segments missing 3 Digit flickering other than normal fl
12. CONDITION BL DOOR CLOSED CE COOK O CN D O M DOOR OPEN MONITOR COMBI COOKING CONDITION MARY INTERLOCK CH UPPER HIGH V SINGLE ONLY MAGNETRON w D O M SWITCH CONDITION OL OVEN LA RD RED Bl BLUE DOOR FM MOTOR WH WHITE GE GREEN YELLOW COOK CM CONN GN GREEN JECTION FAN MOTOR BK B TIM TURNTABLE MO Wo D DOOR OPEN MONITOR 31 SCHEMATIC DIAGRAM CONVECTION COOKING CONDITION PONER 5 SINGLE INTERLOCK WH BL 2 aaa a aJ POWER I RELAY OL OVEN RD FM WH CM BK TT YW 0 0 BR 32 EXPLODED VIEWS AND PARTS LIST 1 KOC 970T EXPLODED VIEW 33 EXPLODED VIEWS AND PARTS UST PARTS LIST PART CODE PART NAME DESCRIPTION REMARK 3511708310 DOOR AS KOC 970T PKCPSWQ200 CONTROL PANEL AS KOC 970T15 PKCPSWQ230 CONTROL PANEL AS KOC 970T25 3516107910 CAVITY WELD AS KOC 970T 3516503300 REAR PLATE 0 SBHG 1TO 6 3514800800 SENSOR TEMPERATURE PTM K312 D4 7113400814 SCREW TAPPING BIN 4 8 MFNI 3511403800 COVER WAVE GUIDE MICA 5 1113400814 SCREW TAPPING T1 BIN 4 8 MFNI 3
13. 1 Remove two screws for earthing and for fixing to rear plate 2 Remove the noise filter from the guide wind 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 reassembly DISASSEMBLY AND ASSEMBLY 3 To remove H V transformer 1 Remove four screws which secure the H V transformer to the base plate 2 Remove the H V transformer 3 Reverse the above steps for reassembly 4 To remove high voltage capacitor 1 Remove a screw which secure the grounding ring terminal of the diode and the capacitor holder lt 2 Remove the H V diode from the capacitor holder v k 3 Reverse the above steps for reassembly SS High voltage circuit wiring DISASSEMBLY AND ASSEMBLY 5 To remove magnetron 1 Remove three screws which secure the magnetron 2 Remove the magnetron 3 Reverse the above steps for reassembly Never install the magnetron withoutthe 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 for a fully assembled oven with door normally closed Cooling fin Filament p terminal lt MAGNETRON gt
14. or if doubt exists as to whether the appliance is properly earthed and either If itis necessary to use an extension cord use only a 3 wire extension cord thathas a 3 blade earthing plug and a 3 slot receptacle that will acceptthe plug on the appliance The marked rating of the extension cord should be equal to or greater than the electrical rating of the appliance or Do not use an extension cord CONTROL PANEL When blinking the oven is operating in COMBI cooking mode When blinking the oven is operating in GRILL cooking mode When blinking the oven is operating in MICROWAVE cooking mode When blinking the oven is operating in AUTO COOK cooking mode When blinking the oven is operating in PIE cooking mode When blinking the oven is operating in CONVECTION cooking mode Temperature Button Used to set desired temperature If this button is pressed for more than 1 3 sec number is scrolled up automatically Microwave Power Level Used to selectthe variable microwave power level If this button is pressed for more than 1 3 sec number is scrolled up automatically Clock Button Used to set time DEFROST GRILL WEIGHT TIME 7 2 10sec Auto Cook 1 Roast Beef 2 Roast P ork 3 Roast Chicken 4 Fish Fillets 5 Vegetable c STOP 2 CLEAR TIME WE
15. 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 door open monitor switch and interlock monitor switch When the door is closed the hook pushes the latch lever downward The latch lever presses the button of the interlock monitor switch to bring it under OFF condition and presses the button of the secondary interlock switch and door open monitor switch to bring it under ON condition al Mounting Condition Door Open Condition Door Close ADJUSTMENT Interlock monitor switch When the door is closed the interlock monitor switch should be opened before other switches are closed When the door is opened the interlock monitor switch should be closed after other switches are opened 3 Adjustment steps 1 Loosen two mounting screws 2 Adjust interlock switch assembly position 3 Make sure that latch lever moves smoothly after adjustment 5 completed 4 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 procedur
16. 10 Filament winding Approx 0 1 Q Secondary terminal Primary winding Approx 1 5 9 2 High voltage capacitor 1 Check continuity of capacitor with meter on the highest OHM scale 2 normal capacitor will show continuity for a short time and then indicate 9M once the capacitor is charged A 3 A shorted capacitor will show continuous continuity Primary 4 An open capacitor will show constant 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 k amp in the other direction Magnetron For complete magnetron diagnosis refer to Measurement of the Microwave Output Power 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 fil
17. 90 1 Water load should be measured exactly to 1 liters 2 Input power voltage should be exactly specified voltage Refer to 2 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 600 650 700 150 800 850 900 950 1000 1050 1100 25 MEASUREMENTAND TEST 2 ELECTRICAL CONTINUITY CHECK OF INTERLOCK SWITCH NOTE Remove the power plug from the wall receptacle before testing PROCEDURE 1 Primary interlock switch 1 Disconnect two connectors from primary interlock switch 2 Connect the ohm meter leads between the terminals of the primary interlock switch 2 Read the value of resistance between the terminals of the switch when the door is opened and when the door is closed 3 Secondary interlock switch 1 Disconnect two connectors from secondary interlock switch 2 Connectthe ohm meter leads between the terminals of the secondary interlock switch 3 Read the value of resistance between the terminals of the switch when the door is opened and when the door is closed 3 Monitor interlock switch 1 Disconnect the lead wire connecting the primary interlock switch and interlock monitor switch from primary interlock switch terminal 2 Connect the ohm meter leads between the lead wire connector disconnected as item1 and the power supply neutral plug pin 3 Read the value of resistance between the lead wire connector and the
18. aq v T _ 03 3001 0120 61666 gt 11 m WO try lo 9 153 Z TO 3UHM 6 M3lv3H MoT 11 Ly OSS OLY ZOOPN lax 90 8 4 899 LO ama 1 14 zi PPOLXZC19 09 NOW 110 0170 2198 F Oo YOLOW cz 273021 e EON 3 1 869 u OL Mv att 62 yeu 60 pda lt 99 v 19 ANN O J 6 HOLON 5 34411 6 Si tO ZiCX Wid a 1 869 5 9 22 eza YOLSINYIHL 1 tal Bo 5 Ix 2 01 1 NSOLVHY 80 vAN p 3 A 5 v 81 E 8 75 6l 2009 1 5q NOMI3NOVIA git 0 gt 6 a aT 8 A RES MN 3 0 Uu Nue do ICE 2 T 61 La IH aden Had E J 77 2 amp 1 v Zr 9092 09 1559 5 E 29 1912 1 Idd 1 44 07 32 4 ONUOY MOIS 8 1110 8 41 1 259 coe 168AN 9 44 P C B CIRCUITDIAGRAM 2 KOC 970T 980T ASS Y PART LIST SYMBOL SPECIFCATION PART CODE o 4 lt PCE M208 92X195 3514314920 M209 86X159 5 3514314930 TRANS POWER LVT1 DMR 101FS 5EPV041351 HOLDER VFD
19. e 1 HM 1 NO Il 39 Luc e x 10 NL com 1 5 Q 1 2 m 3 EL AH I M 920 AA 3514 7 7 3604 48 1 110 102 Sf BP 33113 INT 70 119045 43104 5 wa M HM ON AO 05 fus pe USINNOASNVUL HOLIMS XOLINON HOIH NOON X00 1H31NI 29 SCHEMATIC DIAGRAM IDLE CONDITION AARY INTERLOCK Ww RD A OK ON POWER SUPPLY P N INCLE PHASE E N Cv ONLY LINE FILTER ASSY THERMAL CUT OUT A T BL 0 0 OL OVEN LAMP FM MOTOR TTM TURNTA D O M 000 CONTROL P W B ASS RD WH BK YW BR 77 77 77 MICROWAVE COOKING CONDITION INTERLOCK MONITOR SWITCH CONDITION DOOR CLOSED COOK ON HIGH VOLTAGE PACITOR ETRON 30 SCHEMATIC DIAGRAM GRILL COOKI CONDITION ARY INTERLOCK INTERLOC R MONITOR POWER SUPPLY MAGNETRON DIODEW 77 77 77 UNDER TOP RELAY HEATER HEATER RELAY RELAY
20. long e The voltage used must be the same as specified on this oven Using a higher voltage may result in a fire or other accident causing oven damage Using low voltage will cause slow cooking We are not responsible for damage resulting from use of this oven with a voltage of ampere fuse other than those specified e This 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 Examine the oven after 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 7 Do not operate the oven if it is colder than room temperature This may occur during delivery in cold weather Allow the oven to become room temperature before operating N EARTHING INSTRUCTIONS This appliance must be earthed In the event of an electrical short circuit earthing reduces the risk of the electric shock by pro viding an escape wire for the electric current This appliance is equipped with a cord having a earthing wire with a earthing plug The plug must be plugged into an outlet that is properly installed and earthed WARNING Improper use of the earthing plug can result in a risk of electric shock Consulta qualified electrician or Serviceman if the earthing instructions are not completely understood
21. power supply neutral plug pin when the oven door is opened and when the oven door is closed JUDGEMENT e The value of resistance should be applied to the value specified below Switch Door Open Door Close Primary interlock switch 0 Secondary interlock switch 0 Interlock monitor circuit 0 When value obtained is not acceptable the switch should be replaced or adjusted again 26 MEASUREM ENTAND TEST 3 MICROWAVE RADIATION TEST WARNING Make sure to check the microwave leakage before and after repair of adjustment Always start measuring of an unknown field to assure safety for operating personnel from microwave energy Do not place your hands into any suspected microwave radiation field unless the safe density level is known Care should be taken not to place the eyes in direct line with the source of microwave energy Slowly approach the unitunder 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 5 C 68 9 F in the 600 cc glass beaker with inside diameter of approx 95 mm 3 5 in 3 Place it at the center of the tray and set it in a cavity 4 Close the door and operate the oven 5 Measure the leakage by using Microwave Energy Survey Meter Eig mom s w
22. wire in this mains lead coloured in accordance with the following code Green and yellow Earth Blue Neutral Brown Live As the colours ofthe wires in the mains lead of this appliance not correspond with the coloured markings identifying the terminals in your plug proceed as follows The wire which is coloured green and yellow must be connected to the terminal in the plug which is marked with the letter E or by earth symbol or green and yellow The wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black The wire which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red NOTE This oven is designed for counter top use only SPECIFICATIONS MODEL 970115 970125 POWER SUPPLY 230V 50Hz 230V 50Hz MICROWAVE 1450W 1450W GRILL 1200W 1200W POWER CONSUMPTION CONVECTION 1550W 1550W AUTO COOK 1850W 1850W COMBINATION 2600W Simultaneous 1550W Sequential MICROWAVE ENERGY OUTPUT 1000W IE C705 1000W IEC 705 MICROWAVE FREQUENCY 2450MHz 2450MHz OUTSIDE DIMENSIONS W XH X D 526 345 x 412 mm 20 7 x 13 6 x 16 2 in CAVITY DIMENSIONS W XH X D 335 x250 x 339 mm 13 2x 9 8 x 13 3 in NET WEIGHT APPROX 19 5 Kg 43 Ibs TIMER 60 minutes FUNCTION SELECTIONS MICROWAVE GRILL CONVECTION COMBI POWER SELECTIONS 10 LEVELS
23. 1 F65 3510601500 BRACKET MOTOR SBHG 1 0 8 1 F66 3963513200 MOTOR SHADED POLE OEM 10DW C2 A09 1 F67 7051400811 SCREW MACHINE PAN 4 8 SW MFZN 2 F68 4418629071 SBHG 1 0 6 1 F69 3514400400 PIPE AL1100 1 F70 3511401800 COVER INSULATOR SA1D 80 0 7T 1 F71 3511800400 FAN CONVECTION SA1D 80 0 5 1 72 7121400811 SCREW SPECIAL NUT FLANGE M4 MFZN 1 F73 156274 50 1 SCREW TAPPING 5 4 8 TB W MFZN 1 74 1562741 50X1 SCREW TAPPING T1TRS 4 8 TB W MFZN 4 F75 3511402100 COVER P P 1 38 PRINTED WIRING BOARD 1 CIRCUIT CHECK PROCEDURE 1 Low Voltage Transformer DMR 101FS check The low voltage transformer is located on the P C B Measuring condition input voltage 230 50 Hz KOC 970T 980T L V T DMR 101FS Terminal Voltage 1 2 230VAC 50Hz 4 5 13 0 VAC 6 7 35 0 VAC 8 10 3 0 Secondary side voltage of the low voltage transformer changes in proportion to fluctuation of power source voltage The allowable tolerance of the secondary voltage is within 5 of normal voltage 2 Voltage check Key check point 1 4 Micom Pin 5 Display Pin CHECK POINT REMARK PIN 63 64 0v PIN 29 32 62 5 VDC 500 45 30 31 PIN 1 25 2 6 Display filament voltage Check method VOLTAGE REMARK KOC 970T 980T Replace R24 3 010 Replace D1 D6 8 Replace R28 R2
24. 514400600 PIPE BRASS C3604BD 3517401300 COUPLER CERAMIC 3966510200 MOTOR SYNCRO 230V 25W GM 16 24FD24 7121400811 SCREW TAPPING 125 4 8 MFZN 3510604000 BRACKET MOTOR SYNCRO SECC 8 7113400814 SCREW TAPPING T1 BIN 4 8 MFNI 3512802100 HEATER U AS 971 05 1113400814 SCREW TAPPING T1 BIN 4 8 MFNI 3510310400 BASE SBHG 1T0 8 3515202810 STOPPER HINGE U AS KOC 970T 15422 4081 SCREW SPECIAL TT2TRS 4 8 SE MFZN 3512100900 FOOT PP DASF 130 441611 67820 CAPACITOR HV 2100VAC 1 1UF 441 304112 SECC TO 8 15422 4081 SCREW SPECIAL TT2TRS 4 8 SE MFZN 4416V24000 DIODE HV SANKEN HVR 1X 32B D5 3 3518112100 TRANS HV DY 9050 97T1 15427 40 1 SCREW SPECIAL TT2 HEX FG 4 10 SE MFZN 15312 40 1 SCREW SPECIAL 1 5 4 10 SE MFZN 3513809100 LOCK POM 3513601600 LAMP BL 240V25W T25 H187 5576251060 SW MICRO SZM V16 FA 63 5576231060 SW MICRO SZM V16 FA 61 3513701300 LEVER LOCK POM 75341W 4081 SCREW SPECIAL 125 4512 PW SE MFZN 15 3414 4081 SCREW SPECIAL 125 4 12 PW SE MFZN 15422 4081 SCREW SPECIAL TT2TRS 4 8 SE MFZN 3517502700 PROTECTOR HEATER MICA MT56 T1 0
25. 9 204 NOTE The marks of the above corresponding voltages 5 12 24VDC are written on the PCB Each measuring points must be measured with GND points 39 PRINTED WIRING BOARD 3 Display Problems CAUSE MEASUREMENT RESULT REMEDY Poor contact between and display filament Check the voltage of display pin 1 amp 25 Fix the pin 1 amp 25 on 2 6 VAC the P C B The display has some Refer to The display trouble shooting trouble in its segment orgrid data below Replace P C B assembly The display trouble shooting data TROUBLE Loss vacuum in the display Find white spot DISPLAY NAME amp PIN NO Replace P C B assembly MICOM OUTPUT IN PIN NO M W amp AUTO don t come on Grid 1 61 24 GRILL amp PIE don t come on Grid 2 62 17 COMBI amp TEMP COOK don t come on 18 WEIGHT DEFROST amp Kg don t come on Grid 4 64 16 TIME DEFROST don t come on 21 17 Grid 3 G3 14 10 4 7 Grid 5 G5 13 Segmenta doesn t come on from G1 to G5 Segment a 23 26 Segmentb doesn t come on from G1 to G5 Segment b 22 25 Segmentc doesn t come on from G1 to G5 Segmentc 20 23 Segmentd doesn tcome on from G1 to G5 Segment d 19 22 Segmente doesn t come on from G1 to G5 Segmente 18 21 Segmentf doesn t come on from Gl to G5 Segmentf 16 20 Segme
26. Connectmeggerleads to gt Continuity gt Defective Replace magnetron terminal and magnetron magnetron body Check resistance of m gt Qoro m Defective Replace primary and secondary high voltage coil of high voltage transformer transformer Check continuityof gt No Defective Replace magnetron with wires Continuity magnetron removed Check continuity of No gt Defective H Replace filament terminal of high Continuity high voltage voltage transformer transformer Check D C voltage 0 Defective Replace being supplied to touch control RELAY RY 3 circuit Approx gt Fauly e Replace 13 VDC contacts of RELAY RY3 or open relay coil 21 TROUBLE SHOOTING GUIDE TROUBLE 4 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 motor and oven lamp do notturn on Turn table CHECK Check continuity of primary interlock switch Check continuity of secondary interlock and D O M switch Check D C voltage being supplied to RELAY 4 coil TROUBLE 5 1 Under heater is not heated Food will not become hot 2 Convection motor does not rotate
27. IGHT When blinking the oven is operating in WEIGHT DEFROST cooking mode When blinking the oven is operating in TIME DEFROST cooking mode When blinking the oven is operating in weght input mode Cooking time is increased by 1 minute Cooking time is increased by 10 seconds Function Button Used to select desired cooking function MICROWAVE Grill Defrost TIME or WEIGHT DEFROST CONVECTION Combi COMBINATION Pie e Auto Cook Start Button Used to start the selected cooking cycle Speedy Cook Button Used to program quickly cooking time in 30 sec increments Guide Lamp When blinking itinforms you to be ready to operate dial knob Dial Knob Used to set the cooking time time of day and weight input DISASSEMBLY AND ASSEMBLY Cautions to be observed when trouble shooting Unlike many other appliances the microwave oven is high voltage high current equipment Itis 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 Use an insulated screwdriver and ware rubber gloves when servicing the high voltage side 3 Discharge the high voltage capacitor before touching any oven c
28. PP 3513002600 BUZZER BZ1 BM 20K 3515600100 DIGITRON DP1 SVM 55513 DSVM55513 RESONATOR CERA CRI CST4 00M G W 5 57400 6 89143 218 970 1415 870 MB89143AP 244 980T 1415 C980T0 R CABON FILM R17 1 4W 4 7K OHM RD 42472 22 1 4W 100K OHM 47104 R CABON FILM R13 18 21 1 4W 10K OHM J RN 42103 R CABON FILM R28 29 1 4W 2K OHM J RD 42202 R CABON FILM R12 19 20 27 30 1 4W 1K OHM J RD 4Z102 R CABON FILM R31 1 4W 4 7 OHM RD 42479 R CABON FILM 11 1 6W 20K OHM RD AZ563J R CABON FILM R3 4 14 15 1 6W 10K OHM RD AZ103 R CABON FILM R5 6 7 9 1 6W 4 7K OHM RD AZ472 R CABON FILM R2 8 1 6W 1K OHM RD AZ102 R CABON FILM R10 1 6W 330 OHM RD AZ331 R CABON FILM R16 1 611 510 OHM RD AZ511 R CABON FILM R1 1 6W 100 OHM 2101 R CABON FILM R23 1 4W 10K OHM RN 4Z1002F R CABON FILM R24 1 4W 120K OHM RN 421203F DIODE SWITCHING D7 1N4148M DZN4148M 1 1 1 1 1 1 1 1 1 1 1 3 2 5 1 1 4 4 2 1 1 1 1 1 1 DIODE RECTIFIER D2 6 D8 12 1N4002A DZN4002A DIODE ZENER ZD1 MTZ 3 9B DZTZ3R 9B DIODE ZENER
29. SA1D 80 TO 5 15312 40 1 SCREW SPECIAL TiTRS 4 10 SE MFZN 3511404800 COVER INSULATOR T SECC TO 5 15312 40 1 SCREW SPECIAL TiTRS 4 10 SE MFZN 3510801900 CABINET PCM TO 5 15312 40 1 SCREW SPECIAL TiTRS 4 10 SE MFZN 3512513000 GUIDE TRAY AS K0C 971C05 3517205200 TRAY METAL SPP TO 6 3518700220 FUSE HV 5KV 0 7A THVO60T EXPLODED VIEWS AND PARTS UST 2 KOC 980T EXPLODED VIEW 36 EXPLODED VIEWS AND PARTS LIST PARTS LIST REF NO PART CODE PART NAME DESCRIPTION Q TY REMARK A00 3511708310 DOOR AS 980 1 PKCPSWYA00 CONTROL PANEL AS KOC980T10S SIMUL 1 84 PKCPSWYA00 CONTROL PANEL AS 9 205 SEQUENTIAL 1 01 3516107950 CAVITY WELD AS 980 105 1 02 3518904400 THERMOSTAT 120 60 187 1 F03 7121400611 SCREW TAPPING T2S PAN 4 6 MFZN 1 04 7112400811 SCREW TAPPING TI TRS 4X8 MFZN 1 05 3511403800 COVER WAVE GUIDE MICA TO 5 1 06 1113400814 SCREW TAPPING T1 BIN 4 8 MFNI 1 F07 3514400600 PIPE BRASS 360480 1 F08 3517401300 COUPLER CERAMIC 1 F09 3966510200 MO
30. Service Manual Microwave Oven Model 970115 KOC 970T2S 980 105 980 205 DAEWOO ELECTRONIGS LTD PRECAUTIONS 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 allovens to be serviced before activating the magnetron or other microwave Source and make repairs as 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 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 alignment integrity and connections 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 prior to release to the owner TABLE OFCONTENTS I RU E 2 dz pe Ke
31. TOR SYNCRO 230V 25W GM 16 24FD24 1 10 7121400811 SCREW TAPPING T2S PAN 4 8 MFZN 2 F11 3510604000 BRACKET MOTOR SYNCRO SECC 8 1 12 1113400814 SCREW TAPPING T1 BIN 4 8 MFNI 1 13 3512802100 HEATER 0 AS KOC 971C0S 1 F14 7113400814 SCREW TAPPING T1 BIN 4 8 2 F15 3510310400 BASE SBHG TO 8 1 16 3515202800 STOPPER HINGE U AS KOR 121M0A 1 17 15422 4081 SCREW SPECIAL TT2 TRS 4 8 SE MFZN 2 F18 3512101400 FOOT PP DASF 130 4 F19 4416W 67820 CAPACITOR HV 2100VAC 1108 1 20 441 304112 HOLDER HV CAPACITOR SECC TO 8 1 21 15422 4081 SCREW SPECIAL TT2 TRS 4 8 SE MFZN 1 22 4416V24000 DIODE HV SANKEN HVR 1X 32B D5 3 1 23 3518112100 5 DY N9050 97T1 1 24 15427 40 1 SCREW SPECIAL TT2 HEX FG 4 10 SE MFZN 4 F25 15 312 40 1 SCREW SPECIAL TITRS 4 10 SE MFZN 5 F26 3513809100 LOCK POM 1 27 3513601600 BL 240 25W 25 H187 1 28 5576251060 SW MICRO SZM V16 FA 63 2 F29 5576231060 SW MICRO S ZM V16 FA 61 2 F30 3513701300 LEVER LOCK POM 1 F31 7122401211 SCREW TAPPING 125 TRS 4512 MFZN 2 F 32 7122401211 SCREW TAPPING 125 TRS 4512 MFZN 1 F33 15422 4081 SCREW SPECIAL TT2 TRS 4 8 SE MFZN 1 F34 3517502700 PROTECTOR HEATER MICA MT56 T1 0 2 F35 3510603610 BRACKET HEATER T SECC TO 6 2 F36 15 312 40 1 SCREW SPECIAL TITRS 4 10 SE MFZN 2 F37 3512803000 HEATER MIRACLON 115V 550W 2 F38 3512765100 HARNESS HEATER 3187 FLAG 65MM 1 37 EXPLODED VIEWS AND PARTS LIST
32. ament terminals should indicate 0 1 or less 3 A continuity check between each filament terminal and magnetron case should read open 5 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 the same time Replace just the fuse if the switches operate normally 28 WIRING DIAGRAM NOSL3NOVA NMOUS YOLINON N3dO 4000 OTHA NOLON TISYLNYNL 98 301071 NY NOLO3ANOO WO 40 002 719 0710 108620 MOTUA NIMO 39 3UHM HM NYA 035019 3000 193003 10 6 00 wa 8 qu QM dl N3AO 10 NoLLIaNod U3IROJSNVHL WN a m ASSY Md 1041502 E AW AVY 2 AVY AVTA MV 3 Sy SOLON HOLMS dOL BOM M 5 2 gt lt N0 gt lt ER HOLIMS OOTH3INI 717 77 QN G 2112 i 79 ON NO ON i 2 d PN an q AH Amo T
33. ate KOC 970T 980T 054 1 1 01 UPPER HEATER Check method POINT A POINT B RELAY2 ON RELAY 2 OFF 6 Case of no heating of lower heater When touching TEMP COOK amp PIE button oven lamp turns on fan motor and turntable motor rotate and cook indicator in the display comes on CAUSE Relay 6 RY6 does not operate KOC 970T 980T RY6 G5B 1 LOWER HEATER 18 Check method POINT A POINT B RELAY6 ON RELAY 6 OFF 42 PRINTED WIRING BOARD 7 Case of no stopping of the count down timer When the door is opened during operation the count down timer does not stop KOC 970T 980T Check method STAGE POINT A POINT B Dooropened Open Door closed Closed NOTE Check the state ON OFF of the secondary interlock switch by resistance measurement 8 Case of appearring Err6 on the display KOC 970T 980T Check method WAVEFORM CN NO C OV I 20 ms 50H2 5V NOTE If clock does not keep exact time you must check Diode 07 6 Transistor Q2 43 P C B CIRCUITDIAGRAM 1 KOC 970T 980T
34. es 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 transformer disconnect one lead wire from these parts and then check continuity with the AC plug removed To do otherwise may result in a false reading or damage to your meter NOTE When electric parts are checked be sure the power cord is not inserted the wall outlet Check wire harness wiring and connected of the terminals and power cord before check parts listed below TROUBLE 1 Oven does not operate at all any inputs can not be accepted CONDITION CHECK RESULT CAUSE REMEDY Fuse blows Check continuity of COM lt gt Malfunction Replace interlock monitor switch gt Continuity interlock NOTE 1 with door closed monitor COM NC COM NC switch gt No Continuity Check continuity of both Malfunction p gt Replace primary and secondary Continuity of interlock NOTE 1 interlock switch with Switch door closed gt Continuity Check continuity of gt Continuity gt P Shorted Replace primary interlock switch contacts of NOTE 1 contact with door primary partia
35. ith dual ranges set to 2450MHz 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 When measuring the leakage always use the 5 cm 2 in space cone with probe Hold the probe perpendicular to the cabinet and door Place the space cone ofthe probe on the door cabinet door seem door viewing screen the exhaust air vents and the suction air vents 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 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 27 MEASUREMENTAND TEST 4 COMPONENT TEST PROCEDURE High voltage is present 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 Filament terminal 2 Normal readings should be as follows d Secondary winding Approx 100
36. l Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage 2 Door hook When the door is closed it will automatically shut If the door is opened while the oven is operating the magnetron will immediately stop operating 3 Door viewing screen Allows viewing of food The screen is designed so that light can pass through but not the microwave 4 Top heater Turns on when convection grill and combi cooking is selected 5 Oven lamp Automatically turns on during oven operating 6 Safety interlock system 7 Control panel 8 Turntable tray Rotates during cooking and ensure even distribution of Microwaves It can also be used as a cooking utensil 9 Oven front plate 10 Rotating base This fits over the shaft in the center of the ovens cavity floor This is to remain in the oven for all cooking It should only be removed for cleaning 11 Under heater EXTERNAL VIEW KOC980T gt 5 on ey 1 Door seal Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage 2 Door hook When the door is closed it will automatically shut If the door is opened while the oven is operating the magnetron will immediately stop operating 3 Door viewing screen Allows viewing of food The screen is designed so that light can pass through but not the microwa
37. lly open until interlock interlock monitor switch Switch contact close COM lt gt NC close Check continuity of 0 amp 2 orinfinite Defective low 2 9 Replace primary winding of low voltage voltage transformer Approx transformer 150 210 normal Disconnecthigh voltage Fuseagain gt Defective gt Replace fuse and operate the unit blows high voltage transformer 19 TROUBLE SHOOTING GUIDE CONDITION Outlet has proper voltage Fuse does not blow NOTE CHECK RESULT CAUSE REMEDY Check continuity of No Defective Replace magnetron Continuity i magnetron Check continuity of noise No Defective Replace filter board Continuity noise filter board Check continuity of No Open power gt Adjust power supply cord Continuity i supply cord touch control circuit All these switches mustbe replaced atthe same time please refer to 7 Interlock Mechanism and Adjust for adjustment instructions TROUBLE 2 Grill heater top heater is not heated Food will not become hot CONDITION Grill heater is not heated
38. nt g doesn tcome on from G1 to G5 Segment g 15 19 Segmenth doesn t come on from to G5 Lower bar h 5 14 Segmentidoesn t come on from to G5 Upper bar i 6 8 9 11 40 15 PRINTED WIRING BOARD 4 Case of no microwave oscillation a Situation When touching M W button oven lamp turns on fan motor and turntable motor rotate and cook indicator in the display comes on CAUSE Relay 3 does not operate KOC 970T 980T 2119 KRA102M 654 1 MAGNETRON Check method POINT A POINT B RELAY3 ON GND RELAY 3 OFF 12 VDC b Situation When touching M W button oven lamp does notturn on and turntable motor does not rotate but cook indicator in the display comes on CAUSE Relay 4 RY4 does not operate KOC 970T 980T Check method POINT A POINT B RELAY4 ON RELAY 4 OFF c Situation When touching M W button oven lamp turns on and fan motor does not rotate but cook indicator in the display comes on gt CAUSE Relay 5 RY5 does not operate 41 PRINTED WIRING BOARD Check method POINT A POINT B RELAY5 ON RELAY5 OFF 5 Case of no heating of upper heater When touching TEMP COOK amp COMBI button oven lamp turns on fan motor and turntable motor rotate and cook indicator in the display comes on CAUSE Relay 2 RY2 does not oper
39. omponents or wiring 1 Check the earthed Do not operate on a two wire extension cord The microwave oven is designed to be used with earthed It is imperative therefore to makes sure it is earthed properly before beginning repair work 2 Warning about the electric charge in the high voltage capacitor For about 30 seconds after the operation stopped and 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 15A fuse is blown out 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 Service personnel should remove their watches whenever working close to or replacing the magnetron WARNING When servicing the appliance need a care of 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 DISASSEMBLY AND ASSEMBLY 1 To remove cabinet 1 Remove four screws on cabinet back 2 Push the cabinet backward 2 To remove guide wind assembly
40. re rise of a certain amount of water exposed to the microwave as directed below PROCEDURE 1 Microwave power output measurement is made wit the microwave oven supplied at rated voltage and operated at its maximum microwave power setting with a load of 1000 5cc of potable water 2 The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness 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 Itis 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 Microwave power is switched on Heating time should be exactly A seconds Heating time is measured while the microwave generator is operating at full power The filament heat up time for magnetron is not included The initial and final temperature of water is selected so that the maximum difference between the ambient and final water temperature is 5K c 7 The microwave power output P in watts is calculated from the following formula P 24187 X A TH e DT is difference between initial and ending temperature e tis the heating time The power measured should be B refer to 2 Specifications W 10 0
41. rews D 2 To reduce gap located on part B y e Loosen two screws on stopper hinge under and then push the door to contact the door seal to oven front surface e Tighten two screws gt lt 3 To reduce gap located on part Loosen a Screw on interlock switch assembly located bottom of oven body Draw the interlock switch assembly inward as possible to engage with hook on the door bottom Tighten a screw 4 To reduce gap located on part D Loosen a screw interlock switch assembly located top of oven body Following steps are same as step 3 NOTE Small gap may be acceptable if the microwave leakage does not exceed 1mW cm NOTE The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from the oven cavity during the cook cycle This function does not require that the door be air tight moisture conden sation Tight or light tight Therefore the occasional appearance of moisture light or the sensing of gentle warm air movement around the oven door is not abnormal and do not of themselves indicate a leakage of microwave energy from the oven cavity If such were the case your oven could not be equipped with a bent the very purpose of which is to exhaust the vapor laden air from the oven cavity 15 DISASSEMBLY AND ASSEMBLY 10 To remove motor syncro and under heater 1 Cut the s
42. rocedure Sub assembly touched Normal Malfunction Replace of botton the button keyboard keyboard Before following the particular steps listed above in the trouble shooting guide forthe button keyboard s failure please check for the continuity of each wire harness between the button keyboard and P C B assembly 23 TROUBLE SHOOTING GUIDE BUTTON KEYBOARD CHECK PROCEDURE 1 Type of button names 5 CA1 B7102M V1 The tact switch keyboard consists of 10 keys which configurations are described above Key check procedure To determine if the tact switch keyboard is defective or not check the continuity of each button key contacts with a multimeter 1 AUTO COOK 2 DEFROST 3 TEMP 4 MICROWAVE 5 COMBI 6 GRILL 7 10 SEC 8 1 MIN 9 STOP CLEAR 10 START 11 CLOCK 12 PIE button button button button button button button button button button button button key metrix and circuit diagram between 4 and 10 between 4 and 14 between 8 and 12 between 6 and 14 between 6 and 12 between 2 and 10 between 8 and 10 between 6 and 10 between 2 and 12 between 4 and 12 between 8 and 14 between 2 and 14 24 MEASUREMENTAND TEST 1 MEASUREMENT OF THE MICROWAVE POWER OUTPUT Microwave output power can be checked by indirectly measuring the temperatu
43. se 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 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 1 inform the manufacturer importer or assembler 2 repair the unit at no costto the owner 3 attempt to ascertain the cause ofthe excessive leakage 4 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 immediately IMPORTANT The
44. uorescent slight flickering 4 0 does not display when power is on 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 indicates a number different from one touched for example even if one touched 5 3 appears in the display 5 Specific numbers for example 2 or 3 do not display PROGRAM PIE TEMP KG COOK J when the button is touched iN 7 6 Display does not count down or up with time cooking or bom clock operation 7 Oven is programable and cooks normally but no display shows 8 Display obviously jumps in time while counting down 9 Display counts down noticeably too fast while cooking 10 Display does not show the time of day when clear button is touched 11 Oven lamp and turntable motor do not stop although cooking is finished Check if the RELAY contacts close and if they are close replace touch control circuit NOTE CONDITION CHECK RESULT CAUSE REMEDY Displaydoes Check each button for Normal gt Malfunction gt Replace not show continuity of the button of touch control box programming keyboard for the control circuit sub assembly atall even if following keyboard of control box keyboard is check p
45. ve 4 Top heater Turns on when convection grill and combi cooking is selected 5 Oven lamp Automatically turns on during oven operating 6 Safety interlock system 7 Control panel 8 Turntable tray Rotates during cooking and ensure even distribution of Microwaves also be used as a cooking utensil 9 Oven front plate 10 Rotating base This fits over the shaft in the center of the ovens cavity floor This is to remain in the oven for all cooking It should only be removed for cleaning 11 Under heater 12 Metal rack INSIALLATION Steady flat location This microwave oven should be set on a steady flat surface This microwave oven is designed for counter top use only 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 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 Power supply Check your local power source This microwave oven requires a current of approximately 13amperes 230 Volts 50 Hz Power supply cord is about 1 2 meters
46. yncro motor cover parts from the base plate 2 Remove two screws which secure the motor syncro and supporter to bracket syncro motor 3 Remove two screws and under heater assembly in cavity XB CUTTING BEA 11 To remove grill heater assembly 1 Remove two screws which secure the cover insulator t to top plate 2 Remove the harness between heaters 3 Remove two screws for removing heater brackets 4 Remove heaters 5 Reverse the above steps for reassembly DISASSEMBLY AND ASSEM BLY 12 To remove convection part assembly 980 only 1 Remove cover b and cover insulator b protecting convection part assembly release two lances of cover insulator b 2 Remove four screws which secure the convection part assembly to the cavity rear plate 3 Remove a nut holding the convection fan and the pipe 4 Remove two screws which secure the bracket motor to cover insulator 5 Remove the cooling fan 6 Remove two screws which secure the motor shaded pole to the bracket motor 7 Reverse the above steps for reassembly 17 INTERLOCK MECHANISM AND USIMENT 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 Primary interlock switch When the door is closed
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