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15.Convergence Adjustment Overview - HA-3 Chassis
Chart 15-2 - Generator Patterns
Pattern
Data #
for 1080i
pattern
Data # for
480i
pattern
Data #
for 480p
pattern
Data # for
720p
pattern
Black screen
0
16
26
36
Cent Hatch
1
11
21
31
Color Bars/B-W
2
12
22
32
White Square
3
13
23
33
Color Bars
4
14
24
34
White
5
15
25
35, 37,40
Black
6
16
26
36
Gray scale
7
17
27
Low to High
Freq Sweep
8
18
28
38
Gray
9
19
29
39
Diamond
10
20
30
The video patterns are generated on the QM board taking the following path to OSD IC8801 in Chart 15-3.
Chart 15-3 - Video Pattern Generation
IC
Bd
Name
Purpose
IC7205 /
ST20TP4CX604
QM
Dig Process
Stores the pieces of the
video pattern
IC7203,4 /
GM71VS65163
QM
D RAM
Lays out the pieces
(map)
IC7603 /
STI7000AQA
QM
MPEG
Decoder
Inserts the map into the
video chain
IC8801 /
YGV619
QM
OSD
Pass-through out of the
bd.
Alternate Video 5/6 input Path – used for troubleshooting only
(Q box video bypass is NOT fully tested)
Purpose
All video must pass through the Q box, including TV. When the Q box video path operation is in question, HD
1080i video 5 or 6 input can be routed in a direct path to the CRT if the service mode is operational.
Alternate Signal Path
This alternate path is from the input, B board, A board and C board to the CRT for a normal picture. Refer to
Figure 15-2 and see the Video Processing for details of the alternate signal path.
Summary of Contents for KD-34XBR2 - 34" Hdtv Fd Trinitron Wega
Page 77: ...74 RA 5A Chassis Board Layout ...
Page 108: ...APPENDIX ...
