Pioneer PDP-42A3HD Service Manual page 76

1
8. No Sound in CVBS (Sine wave input)
Preliminary Checkpoints
A
Check the condition of connectin of the input CVBS Audio R/L.
Check the condition of soldering state in CVBS Audio R/L & input part
Check the short point in signal line.
Check for short circuits between each power terminal and the ground.
B
C
D
E
F
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1
2
No Sound in
CVBS Audio R/L
#9,11(1),16,18(2),23,25(3)
at U706
in DTT & Analog B/D
Waveform 18
#56,57
At U751
In DTT&Analog Board
Waveform 19
#11,15
At U200
In Audio Amp Board
Waveform 20
#28,31,27,24
At U200
Waveform 21
Change Speaker
2
3
(1):VIDEO01 Audio
(2):VIDEO01 Audio
(3):VIDEO01 Audio
NG
NG
NG
NG
PDP-42A3HD
3
4
Check CVBS Audio input
part
Check U706 &
input part of U751
Check U751 and
Y800 and related circuit
Check U200 and
X2 and related circuit
4
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