Sony FDL-250T Service Manual page 10

1 2 3 4
A
B
C
D
E
F
G
H
I
– 16 –
5 6 7 8 9 10 11 12 13 14
– 17 –
15 16 17
B BOARD : IC302 IR3Y29B4
B DC DET 25
GAMMA 2 26
GAMMA 0 27
RGB AMPLITUED
ADJUST 28
29
BRIGHT
SUB BRIGHT B 30
SUB BRIGHT R 31
COMMON
32
FRP
FRP 33
F/F
34
SYNC IN
35
SYNC OUT
SYNC SEP 36
B BOARD : IC301 NJM3414AV
1
2
A
3
4
• B BOARD WAVEFORMS
1 2 3
0.9 Vp-p ( H ) 0.3 Vp-p ( 3.58MHZ ) 4.5 Vp-p ( H )
6 7 8
4.5 Vp-p ( H ) 4.3 Vp-p ( V ) 0.9 Vp-p ( H )
– 18 –
24 23 22 21 20 19 18 17 16 15 14 13
SYNC
IN
12 CHROMA OUT
P
N
11 ACC FILTER
P
N
10 B-Y
9 R-Y
8 KILLER FILTER
P N P N
INT/EXT SW
R-Y G-Y B-Y
Y
MATRIX
7 BURST OUT
R-Y G-Y B-Y
PAL
6 COLOR
ON
BGP
P N
5 C IN
COMP
Y/C
4 IDENT FILTER
3 VIDEO IN
2 CONTRAST
1 TRAP
COMP
Y/C
37 38 39 40 41 42 43 44 45 46 47 48
8
7
B
6
5
4 5
4.5 Vp-p ( H ) 4.5 Vp-p