Daewoo KOG-374R0S, KOG-371H0S, KOG-373R0S, KOG-375R0S, KOG-393R0S, KOG-391H0S, KOG-391G0S Check

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TROUBLE SHOOTING GUIDE

CONDITION	CHECK	RESULT	CAUSE	REMEDY
Outlet has	Check continuity of magnetron	No	Defective	Replace
Outlet has		No	Defective
proper		Continuity	magnetron
proper		Continuity	magnetron
voltage Fuse
does not				Replace
blow.	Check continuity of	No	Defective line	Replace
	Check continuity of	No	Defective line
	noise filter board	Continuity	filter board
	Check continuity of	No	Open power	Replace
	Check continuity of	No	Open power
	power supply cord	Continuity	supply cord
		Normal	Defective touch	Replace
			Defective touch
			control circuit

NOTE

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

Turn table motor and oven lamp do not turn on

CHECK

Check continuity of primary

interlock switch

Check continuity of secondary interlock and D.O.M. switches

Check D.C. voltage being

supplied to RELAY (RY2) coil

RESULT

No

Continuity

No

Continuity

0 V

Approx. 15 VDC

CAUSE

Malfunction of

primary interlock

switch

Malfunction of

primary interlock

and D.O.M.

switch

Defective touch

control circuit

Faulty contacts of RELAY (RY2) or open relay coil

REMEDY

Adjust or

replace

Adjust or

replace

Replace

Replace

46

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Contents Microwave Oven Table of Contents For Safe Operation Safety and PrecautionsFor Safe Service Procedures KOG-376T1S KOG-396T1S SpecificationsModel KOG-391G/H/R0SExternal View Outer Dimension465 360 Heating Element Oven Cavity Sefety Interlock System Feature DiagramKOG-376T1S, KOG-396T1S KOG-371R0S, KOG-391R0S KOG-374R0S KOG-375R0S KOG-373R0S, KOG-393R0S KOG-371G0S, KOG-391G0S Control PanelKOG-371H0S, KOG-391H0S KOG-376T1S, KOG-396T1S Grill/Combi Stop/Clear Stop/Clear Start/Easy Cook Auto cook Earthing Instructions InstallationOperation and Functions Wattage output chartDisassembly and Assembly To remove cabinet To remove door assemblyREF. no Part Code Part Name Description QTY Remark To remove door partsPage Frame Door ABS Page Decorator DOOR*T REF no Part Code Part Name Description ’TY RemarkPage Screw Tapping T2SN TRS 4X16 Mfzn Page BARRIER-SCREEN*0 SAN Page To remove control panel parts CONTROL-PANEL ABS Control Panel Knob Volume Button Function Button Fuction *A To remove high voltage capacitor High voltage circuit wiring To remove magnetronTo remove H.V.transformer To remove wind guide assemblyTo remove heater assmbly To remove tray motorTo remove heater parts Adjustment Interlock Mechanism and AdjustmentInterlock Mechanism and Adjustment Check Result Trouble Shooting GuideCheck Check Result Cause Cause Remedy Measurement and Test ProcedureHeating time for power output Microwave Radiation Test Magnetron High voltage transformerHigh voltage capacitor High voltage diodeWiring Diagram KOG-396T1S Check Point Remark Printed Circuit Board KOG-371G/H0S, KOG-391G/H0SLow voltage transformer check Voltage Check Key check pointMesurement point Close GND Check no Hethod Remedy Point State Relay 2 on 5VDC GND Relay 2 OFFPoint State Relay 1 on 5VDC GND Point StateC.B. Circuit Diagram C.B. Location no Name Symbol Specification Part Code ’TYR15 6W 10K 5% Wave Form Remedy Remark Printed Circuit Board KOG-376T1S, KOG-396T1SMesurement point Point State Relay 3 on 5VDC GND 24VDCC.B. Circuit Diagram C.B. Location no KOG-396T1S Printed Circuit Board KOG-371R0S, KOG-391R0S Mesurement point Point State Relay 2 on 5VDC GND Relay 2 OFF C.B. Circuit Diagram Name Symbol Specification Part Code ’TY Remark J1~J17, SJ1 Printed Circuit Board KOG-374R0S, KOG-375R0S Circuit Check ProcedureMesurement point Point State Relay 2 on 5VDC GND Relay 2 OFF C.B. Circuit Diagram Name Symbol Specification Part Code QTY Remark Printed Circuit Board KOG-373R0S, KOG-393R0S Mesurement point Point State Relay 2 on 5VDC GND Relay 2 OFF C.B. Circuit Diagram Wire Copper TIN Coating J3, J5~J10, SJ1 Total Assembly Exploded View and Parts List KOG-371G/H/R0S, KOG-391G/H/R0SREF no Part Code Part Name Description QTY Foot KOR-86150S KOR-61150S Exploded View and Parts List KOG-376T1S, KOG-396T1S CONTROL-PANEL AS Special Screw TT3 TRS 4X8 FLG Mfzn KOG-396T1S Part Code Part Name Description Supply Remark Exploded View and Parts List KOG-374R0S Special Screw TT3 HEX 4X8 Mfzn Exploded View and Parts List KOG-375R0S KOG-375R0S Exploded View and Parts List KOG-373R0S, KOG-393R0S Heater AS Foot 100 101 Printed Date Dec