Sanyo DC-PT70 Service Manual page 22

IC BLOCK DIAGRAM & DESCRIPTION
IC442 TA8223K(Power Amp.)
IC602,801 S524A40X21-SCT0(EEPROM)
8
Vcc
4
GND
WP
7
SCL 6
5
SDA
3
A
2
2
A
1
A 1
0
IC881 KRX101U(Switching)
5
Q1
1 2
START
STOP
LOGIC
LOAD
DEVICE
ADDRESS
COMPARATOR
R/W
ADDR/COUNTER
D
IN
D
OUT
4
Q2
3
IC806 74VHCT08AMTCX(AND)
A 1
0
B 2
0
3
O
0
A 4
1
B 5
1
6
O
1
GND 7
A
L
L
H
H
Pin Names
A B
n' N
O
N
SERIAL
EN
CONTROL
LOGIC
COMP
LOAD INC
DATA WORD
Y DEC
IC401 KIA7805API(Regulator)
1 2 3
- 21 -
14 V
CC
13 A
2
12 B
2
11 O
2
10 A
3
9 B
3
8 O
3
B O
L L
H L
L L
H H
Description
Inputs
Outputs
H,V. PUMP/TIMING
DATA RECOVERY
2
E PROM
SERIAL MUX
D /ACK
OUT
LOGIC
1. INPUT
2. COMMON
3. OUTPUT