Daewoo DV6T712D Service Manual page 22

B. No Hi-Fi playback audio (PLAY MODE)
Is there A.SW signal at IC251
pin#41?
Is there playback audio signal
at IC251 pin#16,17?
YES
Is there Audio at IC252
pin#1,12?
YES
Is playback audio signal output
at IC252 pin#3,13?
YES
C at Q904 is L or H?
L
Check OutputJACK.
NO
Is 12V obtained at IC252
pin#16?
YES
IC601 pin#31 is L, pin#21 is
L?
YES
Is about 3.5V obtained at
IC252 pin#9, 10?
YES
Replace IC252.
21
TROUBLESHOOTING
NO
Check A.SW at IC601 pin#19.
NO
Replace IC251.
NO
Check signal flow circuit
from IC251 to IC252.
NO
Check POWER circuit.
NO
Check IC601.
NO
Check R646, R647, R911,
R913
H
Check MUTE circuit.