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Service Manual

Microwave Oven

Model

KOG-36852S

DAEWOO ELECTRONICS CO., LTD.

Содержание KOG-36852S

Страница 1: ...Service Manual Microwave Oven Model KOG 36852S DAEWOO ELECTRONICS CO LTD ...

Страница 2: ...cavity for proper alignment integrity and connection 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 perf...

Страница 3: ... 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 seal area and oven cavity surface 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...

Страница 4: ...ROWAVE GRILL 1050 W COMBINATION 2200 W MICROWAVE ENERGY OUTPUT 800 W MICROWAVE FREQUENCY 2450 MHz OUTSIDE DIMENSIONS WXHXD 465X274X360 mm CAVITY DIMENSIONS WXHXD 290X290X220 mm NET WEIGHT 14 5 Kg TIMER 35 min DUAL SPEED FUNCTION SELECTIONS MICROWAVE GRILL COMBINATION MICROWAVE POWER LEVELS 3 LEVELS Specifications subject to change without notice 360 465 274 ...

Страница 5: ...at resistant glass Food in a proper receptacle is placed on this tray for cooking Roller Guide This must always be used for cooking together with the glass cooking tray Coupler this fits over the shaft in the center of the oven s cavity floor This is to remain in the oven for all cooking Knob V P C Used to select a microwave power level Knob Timer Used in setting cooking time for all functions æ D...

Страница 6: ...about 1 0 meters long Do not use an extension cord If the supply cord is damaged it must be replaced by the manufacturer or its service agent or a similarly qualified person in order to avoid a hazard INSTALLATION 6 Examine the oven after unpacking for any damage such as Dents A misaligned door Broken door A dents in cavity If any of the above are visable do not install this oven CAUTION Do not un...

Страница 7: ...eset at any time during the cooking cycle by only turning the timer knob Do not let the timer continue to operate after removing food 7 NOTE When using the GRILL KOG 368 9 OS mode Do not open the door so often the temperature inside the oven decrease and the cooking may not complete in setting time Never touch the oven window and metal interior of the oven when taking food in and out because of th...

Страница 8: ...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 5 Heating time should be exactly 52 800W and 47 900W seconds Heating time is measured while the microwave generator is operating at full power The filament heat up time for magnetrons is not incl...

Страница 9: ...nter of the tray and set it in a cavity D Close the door and operate the oven E Measure the leakage by using microwave energy survery meter with dual ranges set to 2450 MHz Measured radiation leakage must not exceed the values 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 2 in 5cm space cone with pr...

Страница 10: ...10 WIRING DIAGRAM SLOW ACTING RELAY ...

Страница 11: ...11 WIRING DIAGRAM ...

Страница 12: ...ltae transformer and this secondary voltage is increased by the action of the diode and the charging of the high voltage capacitor This resultant D C voltage is then applied to the anode of the magnetron As shown in Fig 2 the first half cycle of the high voltage produces in the high voltage transformer secondary charges the high voltage capacitor Current flow is in the direction of the dotted line...

Страница 13: ...to the high voltage transformer to stop microwave oscillation Fan motor timer motor and turntable motor stop rotating Oven lamp turn off As soon as the door is opened monitor switch close NC to create the short circuit If the contacts of primary interlock switch and secondary interlock switch are both malfunction the 15A fuse blows open due to the large current surge caused by monitor switch activ...

Страница 14: ...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 insulted screw driver to discharge 4 When the 15A fuse is blown out due to...

Страница 15: ...stopper hinge top 2 Remove the stopper hinge top Ł and door assembly Ø from top plate of cavity 3 Remove the stopper hinge top Łfrom door assembly 4 Reverse the above for reassembly taking care to replace fixing glue 3 To remove door parts NOTE After replacing the door preform a check of correct alignment with the hinge and cavity front face 1 3 2 ...

Страница 16: ...s 2 To reduce gap located on part B 1 Loosen three screws on bottom hinge and then the door to contact the door seal to oven front surface 2 Tighten three screws 3 To reduce gap locatated on part C See Fig A 1 Loosen a screw on the interlock switch assembly located at the bottom of the oven body 2 Draw the interlock switch assembly inward as possible to engage with hook on the door bottom 3 Tighte...

Страница 17: ...he timer assembly 4 Remove the timer assembly 5 Pull out the knob from the timer assembly 6 Pull out the timer couple from the timer assembly 7 Remove the screw pull out the switch micro 8 Remove the screw æ which secure the V P C coupler 9 Pull out the V P C coupler and V P C knob Ø from the control panel Œ 10 Remove the screw pull out the switch micro 11 Remove the door open button and button sp...

Страница 18: ...itor holder Ø 2 Remove the H V diode Ł from the capacitor holder Ø 3 Reverse the above steps for reassembly High voltage circuit wiring 7 To remove magnetron 1 Remove three screws which secure the magnetron Ł 2 Remove the magnetron Ł 3 Reverse the above steps for reassembly 1 3 2 Magnetron H V Capacitor H V Transformer H V Diode ...

Страница 19: ... transformer Ł 2 Remove the transformer Ł 3 Reverse the above steps for reassembly CAUTION 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 cm2 for a fully assembled oven with door normally cosed Magnetron antenna Metalli...

Страница 20: ... 3 4 5 6 7 3513301100 3512801700 7002500613 7392500008 7002400413 3515000700 7S627W50X1 1 1 1 1 2 2 2 SPP T0 8 230V 1000W TRS 5X6 MFCR 6N 2 5 SUS TRS 4X4 MFCR C3771BD FLG NUT M5X0 8P MFZN INSULATOR HEATER HEATER SCREW MACHINE NUT HEX SCREW MACHINE SPACER INSULATOR I NUT HEX 1 Remove the HEX Nut Œ 2 Remove the Insulator Heater and Heater Ł 3 Remove the two screws º 4 Reverse the above steps for rea...

Страница 21: ...ed 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 micro switch Then the button of the primary interlock switch bring it under on condition ADJUSTMENT 1 When the door is closed the switch button is pushed by the hook The movement of the switch button should exceed 1 2mm measured at the top of the bu...

Страница 22: ...the two mounting screws b Adjust interlock switch assembly position c Confirm the gap 1 2mm described above d Make sure that push lever moves smoothly after adjustments is completed e Completely tighten the two mounting screws 4 Interlock switch resplacement Whenever safety interlock switch are replaced 1 Refer to the following diagram 2 Check the connection of monitor switch after replacement 3 P...

Страница 23: ...terlock switch secondary interlock switch and interlock monitor switch All these switches must be replace at the same time Replace H V T Thermal cut out Outlet has Proper voltage Check continuity of H V T Thermal cut out Check continuity of power supply cord Replace high voltage transformer Replace high voltage Capacitor Replace primary secondary interlock switch and interlock monitor switch Repla...

Страница 24: ...the contacts of a relay operate oven Normal reading should be approx 0Ω Meter with 6V or higher voltage batteries should be used to check the normal direction resistance of the diode NO GOOD Poor continuity Check the isolation of filament winding of high voltage transformer Faulty magnetron GOOD NO Replace or repair oven lamp turntable motor NO continuity NO continuity continuity in the reverse di...

Страница 25: ...adings should be as follows Secondary winding Approx 120Ω 10 Filament winding Approx 0Ω Primary winding Approx 0Ω 2 High voltage capacitor A Check continuity of capacitor with meter on the highest OHM scale B A normal capacitor will show continuity for a short time and then indicate 9MΩ once the capacitor is charged C A shorted capacitor will show continuous continuity D An open capacitor will sho...

Страница 26: ...e ohmmeter Fig a Condition 1 Door is opened 2 Common terminal of the monitor switch disconnected 3 In case of secondary interlock switch Lamp on or zero resistance ohmmeter Fig c Condition 1 Door is closed 2 In case of primary interlock check Lamp on or zero resistance ohmmeter Fig b Condition 1 Door is closed ƒN Schematic diagram of S W tester POWER SUPPLY CORD POWER SUPPLY CORD PRIMARY INTERLOCK...

Страница 27: ...OK ABS PC PP KOR 61150S KOR 61150S POLYESTER T0 1 PP POM PWI A01 A02 A03 A04 A05 A06 A07 A08 A09 1 Door Assembly DOOR AS 3511707360 REF NO 3512202030 3517003060 3515304610 3515201500 3511706100 3517002800 3512300200 3513100700 3515101300 1 1 1 1 1 1 1 1 1 KOG 3685 KOG 3685 KOG 3685 KOG 3685 KOG 3685 KOG 3685 PART NAME PART CODE Q TY REMARK DESCREIPTION ...

Страница 28: ...1 KOG 3685 B5 3513701420 LEVER DOOR OPEN POM 1 KOG 3685 B6 4415A66910 SW MICRO VP 531A OF 1 B7 7121301511 SCREW TAPPING T2S PAN 3X15 MFZN 1 B8 4415A17352 SW MICRO VP 533A OF 1 B9 7121301511 SCREW TAPPING T2S TRS 4X12 MFZN 1 B10 3517400500 COUPLER VPC KNOB POM 1 B11 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 1 B12 3517400400 COUPLER TIMER POM 1 B13 3513402560 KNOB ABS 1 B14 3518203800 TIMER KN35MKD...

Страница 29: ...29 3 Main Unit ...

Страница 30: ...HEX 4X13 SE MFZN 3 F22 SCREW TAPPING 7S312X40A1 T1 TRS 4X10 SE MFZN 2 F23 SCREW MATCHINE 7601400811 PAN 4X8 PW MFZN 2 F24 COVER B 3511402500 SBHG T0 8 1 F25 MOTOR SHADED POLE 3963512100 MW10CA R01 1 F26 FAN 3511800300 PP 30 GLASS 1 F27 SCREW TAPTITE 7272400811 TT3 TRS 4X8 MFZN 1 F28 HOLDER HV CAPACITOR 3513001900 SECC T0 8 1 F29 CAPACITOR H V 441U667020 2100VAC 0 95µF 1 3685 F30 DIODE H V 4416V240...

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