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