Adcom GTP-740 - Page 30

30
GTP-740
SD
RD
D
Q
1Q
GND
1Q
Q
FF1
CP
1SD
1D
1CP
1RD1
10
12
11
13
14
3
2
4
7
5
6
9
8
SD
RD
D
Q
2Q
2Q
Q
FF2
CP
2SD
2D
VCC
2CP
2RD
CPU ASSEMBLY
U024: 74HC74
A1
B1
Y1
A2
B2
Y2
GND
VCC
B4
A4
Y4
B3
A3
Y3
1
2
3
4
5
6
7
14
13
12
11
10
9
8
CPU ASSEMBLY
U023, U027, U028: TC74HC00AP
1IN2a
2CTLa
3OUTa
4GND
5OUTb
6OUTc
7CTLc
8IN2c
16 IN1a
15 GND
14 IN2b
13 VCC
12 CTLb
11 IN1b
10 GND
9 IN1c
Sa
Sb
Sc
S-VIDEO ASSEMBLY
U307-U309: BA7602
IC BLOCK DIAGRAM
Clamp Clamp
SW1
Sync. Sepa.
Sync. Sepa.
Output
0.02µ
10k
2k
50k
680p
100k
1000p
AFCH
SYNC
Switching
H
SYNC
Output
V
SYNC
Sepa Input
V
SYNC
Output
1µ
560
AFC
Vertical Sync.
Sepa. Circuit
SW2
SW3
21 19 18 17 16
7
15
14
139865410
12
11
20
3
Video Input 1
Video Input 2
Video Input
1/2 Switch
0.1µ
1M
GND
560p
560
Y
IN
Adjustment
of Y-level
Adjustment
of Y-level
Character
Input
Character
Input
V
+
Video Output
10µ
1µ
S-VIDEO ASSEMBLY
U306: NJM2217