Service Manual
Model No.:
- 32 -
SCART/PC/A
V
/
SCART/PC/A
V
/YPbPr
YPbPr No Sound
No Sound
5. Audio Trouble
5. Audio Troubleshooting
˄
˄
SCART/PC/AV/
SCART/PC/AV/YPbPr
YPbPr No Sound
No Sound
˅
˅
SCART/PC/A
V
/
SCART/PC/A
V
/YPbPr
YPbPr No Sound
No Sound
Chec
k
if other
channels are no sound?
Y
Reference to the
maintenance process
of
“
All Channels No
All Channels No
Chec
k
if
U1_PIN194,19
6
have
audio signal?
N
N
Y
Chec
k
if the voltage
of U1_PIN197 is 3
V
Chec
k
FB3
Sound
”
Sound
”
N
audio signal?
Chec
k
if the voltage of
U15_PIN1
6
is 5
V
?
N
Y
N
Change C54
Chec
k
if the voltage
of C54 is 1.5
V
?
Chec
k
R139
N
Chec
k
if the control signal of
U15_PIN9,10 are normal
Y
Chec
k
U1_PIN249,250
Change U1
Y
Y
Chec
k
if the audio signal of
U15_PIN3,13 are normal
Chec
k
C239
ǃ
C240
Y
Change the defective
components
Chec
k
if the input circuit from each
terminal to U15 is normal
Y
Y
Y
Change U15
Y
