Video Signal Flow - Sony KZ-32TS1U Training Manual

The video signal processing is performed on three boards (TU, Q and B) and the plasma panel as shown in
Figure 12-1. The composite video or component video is selected in the B board. The OSD is inserted into
the video path (not shown) later on in the B board signal chain. The output of the B board is digital video and
applied to the plasma panel. The video switching control for ICs on the TU, Q and B boards come from the
Main CPU, which is also on the B board.
S VIDEO
COMPOSITE
VIDEO
HD15
VGA
COMPONENT
VIDEO
Y,R-Y,B-Y
(Y,Cr,Cb)
SYNC
H+V
Signal Levels
The tuner signal levels (Table 12-1) were taken with an NTSC generator set to channel 3. The S video levels
(Table 12-2) were taken using a DVD player. The component signal levels (Y, R-Y, B-Y in Table 12-3) were
also taken using a DVD player.
Signal Name
Tuner Video (generator channel 3)
Video
S Video Signal Name
Y
C
Chapter 12 - Video Signal Flow
CN102/
TU BOARD
CN3004
1 3
TUNER VIDEO
L
L
R
IC3014
C
SW.
Y
VIDEO
CN3002/
CN401
R-Y
IC3001,
Y
IC3011
B-Y
SW.
Q BOARD
H
V
FIGURE 12-1 - VIDEO SIGNAL FLOW
Table 12–1- Tuner Input
CN3004/pin 1
CN3001/pin 10
Table 12–2 - S Video Input
Location
CN3001/pin 8
CN3001/pin 6
B BOARD
5
R
CN3001
CHROMA
6
PROCESS
STATES
8
10
Cr
2
Y
4
Cb
6
H
8
10
Location
32

12. Video Signal Flow

CN1204/ CN1
2 1 +
OUT 0
-
3 3
4 5
+
OUT 1
-
5 7
6 9 +
OUT 2
-
7 11
8 13 +
CLK OUT
-
9 15
+
10 17
OUT 3
-
11 19
PLASMA
DISPLAY
PANEL
V
3TVP13 1433
Signal Level
1.2Vp-p
1.2Vp-p
Signal Level
1.2Vp-p
0.6Vp-p
4/12/02