Pioneer AVIC-F910BT Service Manual page 62

1
QQ
Check 11: Is the video circuit OK?
3 7 63 1515 0
<Outline> Composite signal and component signal are output from DVD-LSI (IC1501), and are output from the
A HOST I/F (CN1901) via a buffer circuit.
IC1501
DVD_LSI
Composite
Video
DAC
section
B
<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
C
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.
TE
L 13942296513
COMPOSITE signal
Pedestal level
D
E
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Fig 11.1: Video circuit
Specification value
1 000 mVpp ± 5 %
Color burst
Horizontal sync signal
Fig 11.2: Waveform for the case of composite white 100% output
x ao
y
. i
AVIC-X910BT/XS/UC
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8
COMPOSITE
Reference waveform
Waveform 6
PEAK
Q Q
3 6 7 1 3
Reference
value
BOTTOM
u163
.
3
4
2 9 9 4 2 8
CN1901
HOST I/F
1 5 0 5 8 2 9 9 4
m
co
4
9 9
2 8 9 9