Daewoo DV6T811N-LT, Service Manual

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20
TROUBLESHOOTING
Is Playback Audio signal
output at IC252 pin#3, 13?
Is 12V obtained at IC252
pin#16?
Replace IC252.
NO
IC601 pin#20 is H?
pin#21 is L?
Check IC601.
NO
Is there Playback Audio signal
at IC251 pin#19,20?
Check A.SW at IC601 pin#19
NO
Is thereAudio at IC252
pin#5,14?
Replace IC251.
NO
Check power circuit
NO
YES
YES
Is the voltage at IC251 pin#44
over 3.2V ?
C at Q258 is L or H?
Check MUTE circuit.
H
L
YES
YES
YES
Check Output JACK.
B. No Hi-Fi playback audio (PLAY MODE)
Is A.SW Signal input at IC251
pin#41?
Check DRUM connector
and DRUM
NO
Is about 3.5V obtained at
IC252 pin#9? Is about 8V
obtained at pin#10 ?
Check R298,R299 R646,R647.
NO
YES
Check signal circuit IC251
to IC252
NO