Sony KD-34XBR2 Training Manual page 104

The AD board generates the pattern as an RGB signal (CN3013/pin 1-3) that is sent to Video Processor
IC3006 (A board). The RGB pattern is accompanied by a Ys switching signal from CN3012/pin 20. The Ys
control signal from the AD board is normally 0Vdc, but goes to 5Vdc when the Flash Focus pattern or conver-
gence pattern is called for. See Chart 22-1.
Picture Output
Normal picture
Flash Focus or Convergence crosshatch
The 5Vdc Ys input signal tells IC3006 to replace the normal video path with the RGB pattern from the AD
board when HIGH. This also implies that a defect on the AD board can stop the normal picture and leave a
blank screen. The PJ TV set will still run normally without the AD board plugged in.
Q BOX
CN7001
CN7402
A
B
1
1
CN8801
A
B
11
11
A
B
1
1
CN8601
A
B
RGB
11
11
C BOARDS
FIGURE 22-2 - PHYSICAL VIDEO/SYNC PATH (RA-5A CHASSIS)
Chart 22-1 - Video Process(or) Output Vs Ys control Input
Y - A
CN005
1
P - A
A
B
B 2
1
1
P - A
R 3
H - B
S 3
V - B
S 4
Y - A
5
P - A
B 6
MAIN
B P - A
A
11 R 7
11
H - A
S 8
B
A
V - B
1
1
S 8
Y - A
3
P - A
B 4
Y - C15
P - A
R 5
P
H - A
B
S 6
P
V - B
R
B
S 6
H
A
11
S
11
V
CN004
S
32 CN001
CN3020
A
32
C
32
R = 2
CN3011/PINS
G = 3
B = 5
Ys input from CN3012/pin 20 AD board
0Vdc
5Vdc
B BD.
SUB
VIDEO
PROCESS
SUB
TUNER
VIDEO
- C16
- C17
- C18
B9
- C19
25
1
CN002
CN3022
A
A
25
1
B B9 B6
C
25
1
SUB
TUNER
A BD.
101
22. RA-5A Chassis Video Process
U BD.
CN003
A C
1 1
A C
31 31
MAIN
TUNER
VIDEO
B6
1
A
1
B
1
MAIN
TUNER
50TVP12 1363
INPUTS
VIDEO 1 VIDEO 6
V = A
Y = A15
1 1
Y = A
P = A16
1 2
B
C = A
P = A17
1 3
R
9/4/01