Pioneer PDP-42A3HD Service Manual page 66

1
3. No Component Video Signal
Preliminary Checkpoints
A
Check the condition of connectin of the input component video signal.
Check the condition of soldering state in U401
Check the short point in signal l ine.
Check for short circuits between each power terminal and the ground.
B
signal (SMPTE Color Bars)
C
D
Check the LVDS Cable
E
F
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66
1
2
No Component
#22,25,27
at U1
in digital B/D
Waveform 9
The output signal
At U401
In digital Board
Waveform 10
Dose the signal
appear at PR14~19
In digital B/D
Waveform 11
Dose the signal
appear at
PR29,31,34,35,38,39
In digital B/D
Waveform 12
and JP500
in Digital B/D
Change Digital B/D
2
3
NG
Check the state of soldering
at JP1 &input signal part
NG
Y400 and related circuit
NG
Y2 and related circuit
NG
X2 and related circuit
NG
Change the LVDS Cable
Test Patterm : SMPTE Color Bats
PDP-42A3HD
3
4
Check U401 and
Check U16 and
Check U20 and
&LVDS chip
4
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