Ic Block Diagrams - Hitachi VK-U174 Service Manual

2-4 IC Block Diagrams

IC4001
EXP3
21
EXP2 19
EXP1 18
EXP0
17
LATCH 33
SDATA 34
35
SCLK
REF
V 7
D
V 32
OUT
OSC
36
IN
37
OSC
38
IC2509
1
2
4
5
10
9
13
12
22 31
x 2
8 23 27 9 13 2
GND 7
3
3
Vcc 14
6
8
4
6
11
7
11
12
5
- 9 -
D
6
FIL
2
10 D
1
12 D
M
V
D
FB
11
O
5
FIL
2
14 C
1
16 C
M
V
O
FB
15
B
4 FIL
2
B
30
1
28 B
M
V
B
29 FB
A
3 FIL
2
26 A
1
25 A
M
V
A
25
FB
1 20
IC2510
14 16
Vcc
PHASE
COMPARATOR 1
2
PHASE 13
COMPARATOR 2
1
R
Q 15
S
VCO
9
SOURCE
10
FOLLOWER
GND
8