Sanyo DC-MP4500(BK)/XE Service Manual page 16

IC BLOCK DIAGRAM & DESCRIPTION
IC222 TC9257F (Tuner PLL IC)
FM
L
AMP
FM 1/ 2
IN
FM
H
AM
IN
XT
OSC
CIRCUIT
XT
DATA
CLOCK
PERIOD
(Note) Mark terminals are not existence in TC9256P, TC9256F.
Terminal name of TC9256P, TC9256F is shown in parentheses.
Others are common terminals.
IC440 AN7348K (Play / REC Preamprifier)
24
A/Rec
B
A/Rec
1
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PSC
2 MODULUS 4bit SWALLOW
PRESCALER COUNTER
HF
12bit PROGRAMMABLE COUNTER
FM MODE LF
4
REFERENCE COUNTER
1ms
OSC
24bit REGISTER
24bit SHIFT REGISTER
8
TEST
ADDRESS
DECODER
24bit REGISTER
4 4
20bit BINARY COUNTER
OUTPUT PORT
UNIVERSAL COUNTER CONTROL
OT-4
OT-1 OT-3
OT-2 OT-4
23 22 21 20
Mute
PB Amp(L)
PB Amp(R)
Mute
B
Logic
A/B
2 3 4 5
V GND
DD
POWER ON
RESET
RESET
12
MAX
15
4
UNLOCK
5
5
24 22
10
GATE
XT 1ms
20 19 18 17 16
1 2 3 4 5
19 18 17 16 15
R
P
ALC
P
R
Rec
Nor/Cro
Amp(L)
& Hi/Lo
Rec
Amp(R)
R
P
Logic
Rec/PB
6 8 9 10
7
- 15 -
TRI-STATE
DO1
BUFFER
TRI-STATE
DO2
BUFFER
(DO2 / OT-4)
OT-4
I / O-5 / CLK
I / O-6
I / O-9 / IF
IN2
(I / O-6 / IF
IN2
AMP
I / O-8 / IF
IN1
(I / O-5 / IF
IN1
AMP
I / O-7 / SC
IN
15 14 13 12 11
6 7 8 9 10
14 13
Logic
Ripple
Rejection
11 12
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