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IC BLOCK DIAGRAM & DESCRIPTION
1
FM
IF
FM
DET
LEVEL
DET
2
3
4
5
6
7
8
9
10
11
12
S-CURVE
AM/FM
IF BUFF
REG
GND
COMP
TUNING
DRIVE
AM
IF
AM
DET
VCC
AGC
PHASE DET
PILOT
DET
TRIG
STEREO
SW
DECODER
STEREO
DRIVE
FF FF FF
VCO
AM
/FM
SW
24
23
22
21 20 19
18
17
16
15 14
13
FM
AM
AM
RF
AMP
AM
MIX
AM
OSC
ALC
BUFF
MUTE
IC231 LA1832ML (AM/FM IF Amplifier & FM-MPX)
2
1
24
17
16
3
4
5
6
18
15
7
8
9
10 11
14
19
20
21
22
13
Vssx
XIN
XOUT
FMIN
AMIN
CE
DI
CL
DO
V
DD
Vssd
PD
AIN
AOUT
Vssa
IFIN
IO1
IO2
BO1
BO2 BO3 BO4
PHASE DETECTOR
CHARGE PUMP
UNLOCK
DETECTOR
UNIVERSAL
COUNTER
REFERENCE
DIVIDER
SWALLOW COUNTER
1/16, 1/17 4bits
12bits PROGRAMMABLE
DIVIDER
DATA SHIFT REGISTER LATCH
1/2
CCB
I / F
POWER
ON
RESET
IC241 LC72121M (PLL Synthesizer)
A
B
OUT A
OUT B
-IN A
+IN A
V
EE
V
CC
V
CC
+IN B
-IN B
12
3
4
5
6
7
8
9
IC410 KIA4558S
(Dual Low Noise Operational Amplifier)
Vdda
REFERENCE
VOLTAGE
3
4
2
20
21
22
23
7
8
9~11,16,17
156
14
15
19
18
24
13
12
ANTIALIASING
FILTER
57kHz
BPF
(SCF)
SMOOTHING
FILTER
VREF
PLL
(57kHz)
CLOCK
RECOVERY
(1187.5Hz)
DATA
DECODER
SYNC/EC CONTROLLER
ERROR CORRECTION
(SOFT DECISION)
R A M
(24 BLOCK DATA)
C C B
TEST
MEMORY CONTROL
CLK(4.332MHz)
OSC / DIVIDER
SYNC
DETECT-1
SYNC
DETECT-2
Vssa
MPXIN
DO
CL
DI
CE
T1
T2
T3~T7
XIN
XOUT
Vddd
Vssd
RDS-ID
VREF
FLOUT CIN
SYNC
SYR
IC251 LC72720N (RDS Signal Processor)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25 24
23
22
21
20
19
18
17
16
DI
CE
VSS
TEST
LOUT
LBASS2
LBASS1
LTRE
LIN
LSEL0
L4
L3
L2
L1
NC
CL
VDD
VREF
NC
ROUT
RBASS2
RBASS1
RTRE
RIN
RSEL0
R4
R3
R2
R1
NC
IC415 LA2615
(Surround Signal Processor)
P16 P15 P14 P13 P12 P11 P10 P9
P1 P2 P3 P4 P5 P6 P7 P8
ANALOG
SURROUND
ATT LEVEL
ON/OFF
VREF
A
A
B
B
SW
SW
Vcc
CONT1 CONT2 CONT3 GND HFFC VREF L-IN R-IN
GCR GLR POG LPFD NC VCC L-OUT R-OUT
IC458LC75342M
(Electronically Controllable electronic Volume)
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