Daewoo DV-K580NZ-T service manual PB-Y Signal N.G

Page 37

TROUBLESHOOTING FLOW CHART

C. PB-Y SIGNAL N.G.

	Is envelope output		NO
	from pin 7,11 of IC 401?		NO

	YES
	YES

Check

Q409, 410, 411.

Is 5V supplied at pin 1, 2 of IC 401?.

YES

Is SW pulse input at pin 6 of IC 401?.

YES

NO

NO

Check power circuit.

Check pin 18 of IC 601.

Clean head or change head.

Is signal input at pin 39 of IC 301?

YES

Is signal output from

pin 3 of IC 301?

YES

NO

NO

Check PCB PATTERN

and Q408.

Check pin 35 Vcc of IC301.

YES

Check pin 5 EE(L)/PB(H) of IC 301?.

YES

NO

NO

Check power.

Check pin 44 of IC 601.

Change IC 301.

Is signal input into pin 4 of IC 301?

YES

Is signal input into pin 10 of IC 301?

YES

Is signal output from

pin 34 of IC 301?

YES

Is signal input into pin 4 of RL 902?

YES

TERMINAL OUT.

NO

NO

NO

NO

Is signal output from		NO
pin 8 of IC 303?

	YES


Check Q303.


Check IC 302 and
Q311, Q313.
		NO

Is supplied at
pin 35 Vcc?.

	YES


Check PCB PATTERN.

Check Q301, Q302, Q305.

Check power.

Change IC 301.

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Contents Time Lapse VCR Table of Contents Safety Check After Serving SAFETY&PRECAUTIONSSAFETY&PRECAUTIONS Front Views Function External ViewsRear Views Function AC Power CordAdjustment Procedure Electrical AdjustmentEE Level Video Circuit Adjustment MethodPlayback Y-SIGNAL Output Level Sync TIP Frequency FM Deviation Record Current REC-Y Audio Record Bias Audio Circuit Adjustment MethodNtsc SpecificationsTape Mode Tape Speed Remark Timelapse REC/PB Speed ChartCircuit Operation REC ModeVideo Part X302 IH DLY Audio Part Servo Syscon Part Block DiagramR L R L R L R L Time Lapse Recording MethodAlarm Output Alarm InputTerminal Part Panic InputSW Output Tape END OUTSeries Output Series Input Power Circuit Trouble Shooting Flow ChartChecking the Primary Circuit Checking the Secondary Circuit Troubleshooting Flow ChartSERVO-SYSCON Circuit Noise appears on Screen on the whole Auto-stop during Playback Power CIRCUIT? YES Capstan M/T loading stops REC Mode Cassette is not inserted Power compensation Does not operate Video Circuit EE Mode N.GREC Signal N.G PB-Y Signal N.G PB-C Signal N.G Audio Circuit Troubleshooting of PB ModeTroubleshooting of REC Mode Troubleshooting of EE Mode COM Port Description COM Port Description OUT OSD Data IC Motor Drive BA6209 IC504 Voltage ChartIC Relay A9W-K RL902 IC Relay A9W-K RL901IC Video LA7391A IC301 IC Video SW LA7152 IC303 Transister IC Video AMP NJM2267 IC002Voltage Chart Connection Diagram Circuit DiagramPower Circuit Diagram Syscon Circuit Diagram Video Circuit Diagram Headamp Circuit Diagram OSD Circuit Diagram C Separation Circuit Diagram Audio Circuit Diagram Logic Circuit Diagram Terminal Circuit Diagram PCB Main Components Location Guide on PCB Bottom ViewPCB Union Panel Front ASS’Y DisassemblySET Total ASS’Y Packing ASS’Y DEL DV-K580NZ-T Electrical Parts ListElectrical Parts List SPG T SUB Brake Coil OSC DEO-010BIAS Diode Bridge R205 R413 Mylar Clip Fuse Semi Fixed Diode Zener UZ-5.6BSC PCB Logic AS DV-K580NZ-T SW Tact Diode EG01C Mail G7F00E@web.dwe.co.kr TEL FAX