Daewoo DV6T712D Service Manual page 17

TROUBLESHOOTING
4. AUDIO (Hi-Fi MODEL)
A. No sound in E-E mode
A. a.RF E-E
No sound in RF E-E
mode
Is there Audio at IC252
pin#4,11?
YES
Is RF Audio signal output at
IC252 pin#3,13?
YES
C at Q904 is L or H?
L
Check Output JACK.
NO
NO
H
IC601 pin#27
H
Check IC601.
A.Mute is L or
H?
L
Check Q904, Q905,
R937,R938,R939
Check IC121, RF101 block.
Is 12V obtained at IC252
pin#16?
YES
IC601 pin#31 is H, pin#21
is H?
YES
Is about 8V obtained at
IC252 pin#9?
Is about 8V obtained at
IC252 pin #10?
YES
Replace IC252.
16
NO
Check POWER circuit.
NO
Check IC601.
NO
Check R646, R647.