Pioneer AVIC-F90BT/XS/UC Service Manual page 59

Flash memory multimedia av navigation receiver
Table of Contents

Advertisement

5
QQ
3 7 63 1515 0
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
Video
DAC
section
<Checking method> Playback DVD-REF-A1 TITLE2 CHAPTER5 (WHITE 100%), and monitor COMPO signal with
Check point 1 (stylus)
NO.
1 COMPO
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
COMPO signal
<Video level readjustment method>
In case the video composite output is outside of the specification value, readjust the level according to the method
described below.(Note : Units are exchanged, the video output is not adjusted. )
Turn the volume (VR1671) to adjust the video level within the range of 1.0 ± 0.02 Vpp.
The adjustment specification is 1.0 ± 0.02 Vpp.
IC1501
LSI
Video
DAC
section
www
.
5
http://www.xiaoyu163.com
AVCC5
Composite
Component Y
Video buffer circuit
Component Cb
NoMount
Component Cr
Fig 11.1: Video circuit
an oscilloscope with GNDV1 (stylus) being the reference. Set the trigger mode to "TV trigger" and
the trigger line to "150 line".
Specification value
1 000 mVpp ± 5 %
Color burst
Pedestal level
Horizontal sync signal
Fig 11.2: Waveform for the case of composite white 100% output
AVCC5
Q1701(NoMount)
Y
Video buffer circuit
Cb
Q1702(NoMount)
Video buffer circuit
Q1704(NoMount)
Cr
Video buffer circuit
Fig 11.3: Video circuit (component)
x
ao
y
i
http://www.xiaoyu163.com
6
8
Reference waveform
Waveform 6
PEAK
Q Q
3
6 7
1 3
Reference
value
BOTTOM
u163
.
AVIC-F90BT/XS/UC
6
7
2 9
9 4
2 8
CN1901
HOST I/F
COMPO
1 5
0 5
8
2 9
9 4
Adjust this level within the
range of 1.0 ± 0.02 Vpp.
CN1901
HOST I/F
Y
Cb
Cr
m
co
7
8
9 9
A
B
C
2 8
9 9
D
E
F
59
8

Hide quick links:

Advertisement

Table of Contents
loading

This manual is also suitable for:

Avic-f900bt/xs/auAvic-f900bt/xs/uc

Table of Contents