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IC BLOCK DIAGRAM & DESCRIPTION
Nor/Cro
& Hi/Lo
Logic
R
R
P
R
P
P
ALC
Mute
Mute
Logic
A/B
Logic
Rec/PB
Ripple
Rejection
Rec
Amp(L)
Rec
Amp(R)
PB Amp(L)
PB Amp(R)
A/Rec
A/Rec
B
B
1
2
3
4
5
7
6
8
9
10
12
11
13
14
15
16
17
18
19
20
21
22
23
24
L-PB AMP
R-PB AMP
R-PB NF
R-PB EO
R-PB OUT
AB SW
R-REC OUT
R-REC IN
REC/PB SW
A/B SW
FIL
TER
GND
VCC
CR
O/NOR
HI/LO
ALC
L-REC OUT
L-REC IN
ALC
L-PB
AMP OUT
L-PB EO
L-PB NF
R-PB AMP
L-PB AMP
IC440 AN7348K (Play /Rec Pre Amp)
IC222 TC9257F (Tuner PLL IC)
2 MODULUS
PRESCALER
4bit SWALLOW
COUNTER
POWER ON
RESET
TRI-STATE
BUFFER
TRI-STATE
BUFFER
OUTPUT PORT
ADDRESS
DECODER
OSC
CIRCUIT
PHASE
COMP
ARA
T
O
R
12bit PROGRAMMABLE COUNTER
20bit BINARY COUNTER
UNIVERSAL COUNTER CONTROL
REFERENCE COUNTER
24bit REGISTER
24bit SHIFT REGISTER
24bit REGISTER
MAX
1/ 2
UNLOCK
I/O POR
T
TEST
GATE
AMP
AMP
AMP
OT-4
OT-4
OT-1
OT-3
OT-2
OT-4
RESET
PSC
MODE LF
FM
HF
FM
H
FM
L
XT
1ms
1ms
OSC
4
8
24
22
10
5
5
4
4
15
12
4
DO1
I / O-5 / CLK
I / O-6
I / O-7 / SC
IN
DO2
(DO2 / OT-4)
I / O-9 / IF
IN2
(I / O-6 / IF
IN2
)
I / O-8 / IF
IN1
(I / O-5 / IF
IN1
)
GND
V
DD
FM
IN
AM
IN
XT
XT
DATA
CLOCK
PERIOD
