Pioneer AVH-P3100DVD Service Manual page 55

5
Check 11: Is the video circuit OK?
<Outline> Composite signal and component signal are output from DVD-LSI (IC1501), and are output from the
HOST I/F (CN1901) via a buffer circuit.
IC1501
DVD_LSI
Composite
Video
DAC
section
Fig 11.1: Video circuit
<Checking method> Playback DVD-REF-A1 TITLE2 CHAPTER5 (WHITE 100%), and monitor COMPOSITE signal with
an oscilloscope with GNDV1 (stylus) being the reference. Set the trigger mode to "TV trigger" and
the trigger line to "150 line".
Check point 1 (stylus)
NO.
1 COMPOSITE
In case of NG, check the applicable line, the periphery of the major components in the drawing above, soldering of the
peripheral components and defective components.
COMPOSITE signal
Pedestal level
Fig 11.2: Waveform for the case of composite white 100% output
5
6
Specification value Reference waveform
1 000 mVpp ± 5 % Waveform 6
Color burst
Horizontal sync signal
AVH-P3100DVD/XN/UC
6
7
CN1901
HOST I/F
COMPOSITE
PEAK
Reference
value
BOTTOM
7
8
A
B
C
D
E
F
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