Ic Block Diagram - NAD C 422 Service Manual

IC BLOCK DIAGRAM

U201: LC866448B
P00
P01
P02
P03
P04
P05
P06
P07
VSS2
P10/SO0
P11/SI0/SB0
P12/SCK0
P13/SO1
P14/SI1/SB1
P15/SCK1
P16/BUZ
U202: 24C08
8
VCC
4
GND
7
WP
6
START
SCL
STOP
5
SDA
LOGIC
DEVICE
ADDRESS
COMPARATOR
3
A 2
2
A 1
1
A 0
D
IN
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
SERIAL
CONTROL
LOGIC
LOAD
COMP
LOAD INC
R/W
DATA WORD
ADDR/COUNTER
Y DEC
D
OUT
EN
H.V. PUMP/TIMING
DATA RECOVERY
EEPROM
SERIAL MUX
D /ACK
OUT
LOGIC
- 15 -
40 S15/T15
39 S14/T14
38 S13/T13
37
S12/T12
36 S11/T11
35 S10/T10
34 S9/T9
33 S8/T8
32 S7/T7
31 S6/T6
30 S5/T5
29 S4/T4
28 S3/T4
27 S2/T2
26 S1/T1
25 S0/T1
U402: NJM78M56FA
1
OUTPUT
INPUT 2
GND
3