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5
Check 11: Video circuit OK?
<Outline>
A composite signal is output from DVD-LSI (IC1501)
and is output from HOST I/F (CN1901).
IC1501
DVD_LSI
Composite
Video
DAC
<How to check>
Play back DVD-REF-A1 TITLE2 CHAPTER5 (WHITE 100IRE).
Monitor the COMPOSITE signal based on GNDV1 (sending pin) using an oscilloscope.
Set the Trigger mode and Trigger line to TV trigger and line 150 respectively.
NO.
Spot to check 1 (sending pin) Rated value
1 COMPOSITE
If NG is found, check the relevant lines, periphery of main components described above,
soldering of peripheral components and defective components.
COMPOSITE signal
Pedestal level
PCB side A
5
6
COMPOSIT
Fig. 11.1: Video circuit
1000 mVpp ± 5 %
Color burst
Horizontal synchronous signal
Fig. 11.2: Waveform when 100% composite white is output
Fig. 11.5: Spot to check in VIDEO signal
AVH-P6300BT/XNUC
6
7
CN1901
HOST I/F
Reference waveform
Waveform 6
PEAK
Rated value
BOTTOM
7
8
A
B
C
D
COMPOSITE
E
F
55
8
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