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Pioneer PDP-42A3HD Service Manual page 68

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1
4. No TV Signal
Preliminary Checkpoints
A
Check the condition of connectin of the input TV signal.
Check the condition of soldering state in Tuner & 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
T04
68
1
2
No TV
signal (SMPTE Color Bars)
#63
at U706
in DTT & Analog B/D
Waveform 13
#119
At U711
In DTT&Analog Board
Waveform 14
Dose the signal
appear at PR22,24
25,26 In DTT&Analog
B/D
Waveform 11
Dose the signal
appear at
PR29,31,34,35,38,39
In digital B/D
Waveform 12
Check the LVDS Cable
and JP500
in Digital B/D
Change Digital B/D
2
3
NG
NG
NG
NG
NG
PDP-42A3HD
3
4
Check A_CVBS1 input
part
Check U706 &
input part of U711
Check U16 and
Y2 and related circuit
Check U20 and
X2 and related circuit
Change the LVDS Cable
&LVDS chip
4
T04

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