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DAEWOO ELECTRONICS KOG-84CR Service Manual Download Page 21

21

Outlet has 
proper voltage.
Fuse does 
not blow

No
Continuity

Check continuity
both magnetron and
heater thermostat

check continuity of noise
filter board

Check continuity
of power supply cord

No
Continuity

Normal

Defective touch
control circuit

Replace

Open power
supply cord

Replace

No
Continuity

Defective line
filter board

Replace

Defective
magnetron and
heater thermostat

Condition

Grill heater
does not heat

No
Continuity

Check continuity
both primary
interlock switch

Check continuity
of heater
thermostat

Check continuity
of secondary
interlock switch

Check continuity
of heater

No
continuity

Defective heater

Replace

Check D.C. voltage 
being supplied to 
RELAY (RY3) coil

0V

Approx.
-16V DC

Faulty contacts of
RELAY (RY3) or
open relay coil

Defective touch
control circuit

Replace

Replace

No
Continuity

Malfunction of
secondary
interlock switch

Adjust or
replace

No
Continuity

Defective heater
thermostat

Replace the
heater
thermostat

Malfunction of
primary interlock
switch

Adjust or
replace

Check

Result

Cause

Remedy

NOTE 1 : All these switches must be replaced at the same time, please refer to page 18 and 19 for adjustment

instructions.

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(TROUBEL 2) Heater does not heat (Food will not become hot).

Summary of Contents for KOG-84CR

Page 1: ...Service Manual Microwave Oven Model KOG 84CR DAEWOO ELECTRONICS CO LTD...

Page 2: ...g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g g e e g...

Page 3: ...e 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 Correct Installation 1 This micr...

Page 4: ...minal which is marked with the letter L or coloured red e e h h h h h h e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e...

Page 5: ...n Select Function Microwave Grill Combination Microwave Power Level 5 stages Specifications are subject to change without notice 348 236 389 294 319 501 FIG 1 FRONT VIEW FIG 2 SIDE VIEW M W Lock Auto...

Page 6: ...shut If door is opened while oven is operating magnetron tube will immediately stop operating 3DOOR SCREEN Allows viewing of food Microwave cannot pass through perforations in screen 4GRILL HEATER Tur...

Page 7: ...r all information manually put into the oven control panel except clock When blinking the OVEN is interrupt Manipulation Mode START BUTTON Used to start a selected operation When lamp blinks press the...

Page 8: ...e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e g g g g g g STAGE COOKING TIME WEIGHT DEFROST M...

Page 9: ...When the door is closed the hook will lock the oven door If the door is not closed properly the oven will not operate When the door is closed the hook pushes the lever downward The lever presses the...

Page 10: ...tch should be opened before other switches closed When the door is opened the monitor switch should be closed after other switches opened Secondary interlock switch and D O M switch The movement of th...

Page 11: ...6K hf N e 1 L W Y J H W2 0M I4 6K g 3 1 N LfV 1 V K hfO Xhf N X h I4 6KfI4 6X 3 e 5 1 7 H W W M f I4 f N L 1f N V 6X hW2 X hf3 1 hf 6Xg X N e H hf J J 5 7 5 O 0Yh I f 3 1 3 g3 L V4 Kg O 0MI XhfV Lhf X...

Page 12: ...K e 7 5 I4 e 3 X 6X W M e I4 6X g I 6X g V Y heV I 6X hf M eI J 5eJ H 6X N X X W Hg I4 XhV KhN Hhf N heO2 V4 Khf 0Yf N 7 He7 5 3 f X 3 X X hf 7 h I K g V 6Kg 5 L gO2 I4 6X 5 e H V e J 1 V K 3 1 hfJ L...

Page 13: ...e O L J W 0M I4 6K I4 X W 0Y V4 W Mg 6X gI4 K O 0M 7 5 W2 1 O 0M W 0M I4 6K I4 K O M I4 6K 7 0Y g I4 Kh I4 6X O2 0M Y 7 W2 0M O 0M I4 6X I 6K O2 0Y I 6K 0M h e I4 6Kh I K W2 0M H 3 O M O2 M I4 K V4 6K...

Page 14: ...0Y V 6K f I 5 W 5 I X V4 6X V4 K I4 6X W2 M O2 M O2 0M O2 M W2 M g W V4 6K fV Y 7 H V K I4 K I 6X I K O 0Y W2 0Y W2 M O2 0Y O 0Y J g W I 6X e V4 0YeJ V4 6X I 6K V4 K V4 6K W2 0M O 0M O 0Y W2 M O2 0M 7...

Page 15: ...o screws q which secure the switch card reader 0 7 Reverse the above steps for reassembly REF NO PART CODE PART NAME DESCRIPTION Q TY REMARK 1 3516706670 CONTROL PANEL ABS 1 2 3515500700 WINDOW DISPLA...

Page 16: ...e the spring hook 5 Remove two hooks and lever hook REF NO PART CODE PART NAME DESCRIPTION Q TY REMARK A1 3511704600 DOOR PAINTING AS KOG 840KS 1 A2 3517001800 BARRIER SCREEN I TEMPERED GLASS 3 2T 1 A...

Page 17: ...7 6K J N f 3 X 7 5 fW Y V Lh3 1 6K 7 3 Lf N 1 J H f7 0Y V X gN 6K N X f3 L W f J M V 1 g L J 6X 3 1 fN 1 7 f 7 H N g 1 7 5 X N Lf 3 L 5fJ he O2 6K h3 Lg 3 H J eI4 1 3 1f N 1 e W 5hO2 6X gN 1g N 7 5g I...

Page 18: ...the tray motor cover parts from the base plate Refer to Fig 11 12 2 Remove the tray motor cover 3 Remove two screws which secure the tray motor to tray motor bracket 4 Remove the tray motor FIG 12 Bot...

Page 19: ...e AC plug removed To do otherwise may result in a false reading or damage to your meter TROUBLE SHOOTING GUIDE NOTE When electric parts are checked or replaced be sure the power cord is not inserted t...

Page 20: ...interlock switch with door closed Check continuity of primary interlock switch contact with door partially open until interlock monitor switch contact close COM NC close Check continuity of primary w...

Page 21: ...pprox 16V DC Faulty contacts of RELAY RY3 or open relay coil Defective touch control circuit Replace Replace No Continuity Malfunction of secondary interlock switch Adjust or replace No Continuity Def...

Page 22: ...and secondary coil of high voltage transformer 0 or Defective high voltage transfromer Defective high voltage transfromer Defective touch control circuit Faulty contacts of RELAY RY1 or open relay co...

Page 23: ...00 does not display when power is on 2 A distinct change in the brightness of one or more numbers is in the display 3 One or more digits in the display are not on when they should be 4 Display indica...

Page 24: ...e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e...

Page 25: ...itch 2 1 Procedure 1 Primary Interlock Switch 1 Disconnect two connectors from Primary Interlock Switch 2 Connect the ohmeter leads between the terminals of the primary interlock switch 3 Read the val...

Page 26: ...ng a load of 275 5 mililitres of tap water initially at 68 9 F 20 5 C placed within the cavity at the center of the load carrying surface provided by the manufacture The water container should be a lo...

Page 27: ...tage diode is located on the base near the transformer A Isolate the diode from the circuit by disconnecting the leads B With the ohmmeter set on the highest resistance scale measure the resistance ac...

Page 28: ...MOSTAT KK KK MAGNETRON THERMOSTAT KK KK L V TRANSFORMER HEATER RELAY MOTOR RELAY CONTROL P W B ASS Y POWER RELAY SECONDARY INTERLOCK SWITCH BB BB D O M SWITCH H V DIODE H V CAPACITOR MAGNETRON H V TRA...

Page 29: ...EARED MOTOR RR RED WW WHITE KK BLACK OO ORANGE BB BLUE NN BROWN GG GREEN GY GREEN YELLOW HEATER CONTROL P W B ASS Y GM CL FM POWER SUPPLY SINGLE PHASE ONLY GY LINE FILTER ASS Y GG WW WW WW WW L NN L B...

Page 30: ...RR RED WW WHITE KK BLACK OO ORANGE BB BLUE NN BROWN GG GREEN GY GREEN YELLOW KK HEATER CONTROL P W B ASS Y GM CL FM POWER SUPPLY SINGLE PHASE ONLY GY LINE FILTER ASS Y GG WW WW WW WW L NN L BB FUSE P...

Page 31: ...31 EXPLODED VIEW Au to Co ok me nu...

Page 32: ...2 F21 3518109510 TRANS HV DH N90N0 84T 1 3518109500 TRANS HV JY N90N0 84T 1 SUB F22 7S327W50B1 SCREW TAPPING T2 FLANGE 5X12 MFZN 4 F23 3518002400 MAGNETRON 2M218J MF I 1 F24 7S312X4081 SCREW TAPPING...

Page 33: ...700 NOISE FILTER DWLF L1 1 F53 4414A25100 FUSE BUSSMANN MDA 15 1 F54 7621401211 SCREW TAPPING T2S PAN 4X12 PW MFZN 2 F55 35113R5GM5 CORD POWER AS 3X1 5 80X80 120 RTML 1 F56 7S422X4081 SCREW SPECIAL TT...

Page 34: ...e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e...

Page 35: ...35 FIG 17 MEASUREMENT POINT MP1 MP3 MP2...

Page 36: ...36...

Page 37: ...ly TROUBLE TIME DEFROST g do not come on WEIGHT DEFROST WATT do not come on COMBI does not come on GRILL AUTO COOK do not come on M W LOCK do not come on SEGMENT a does not come on from G1 to G5 SEGME...

Page 38: ...is not Grill heat When pressing button oven lamp turns on Fan motor and turntable and cook indicator in display comes on Cause RELAY 3 does not operate CHECK METHOD POINT A B STAGE RELAY 2 ON GND 5VD...

Page 39: ...ust check Diode D6 transistor Q2 A B MICOM CN2 R7 C2 R8 31 R19 5V C3 R6 D O M SW A B C MICOM D7 D8 D6 D9 D5 R10 C7 C6 C6 R9 5V 29 4 5 POINT A B STAGE 1 DOOR OPENED OPEN 5VDC 2 DOOR CLOSED CLOSED GND C...

Page 40: ...the CARD NOTE 2 When the card Reader does not operate properly Replace a card Reader 17 27 16 28 V1 N C PH1 RCL RDT CLS 1 2 3 4 5 6 7 CA1 F5102Z RA1 5A104J 53014 0710 CN1 CARD READER ASS Y HARNESS P C...

Page 41: ...41 1 Transistor NPN Type 2 Diode and zener diode Emitter Collector Q1 Q12 Base DIODE Cathode K ANODE A D1 15 ZENER DIODE Cathode K ANODE A ZD1 6 Q1 Q10 D1 10 ZD1 4...

Page 42: ...42 P C B CIRCUIT DIAGRAM...

Page 43: ...0500 CONNECTOR WAFER YW396 03AV CN101 4CW215RBD0 CONNECTOR HLEM15R 1 PCB SUB D2 D10 DZN4002A DZN4002A 1N4002A ZD1 DZTB3R9B DZTZ3R9B MTZ 3 9BV 1 2W ZD2 DZTZ5R6B DZTZ5R6B MTZ 5 6BW 1 2W ZD3 DZTZ4R7B DZT...

Page 44: ...C0101112 SW RELAY G5J 1 TP M DT 12V SW101 111 5S50101Z93 SW TACT KPT 1115AM PCB SUB CD1 3511405900 COVER LED PP PCB SUB Q1 3 Q6 Q8 Q10 TZRC106M TRANSISTOR KRC 106M Q5 TZTA1270Y TRANSISTOR KTA 1270Y Q7...

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