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• Tuner section
IC21 LC72130
6-19. IC BLOCK DIAGRAMS
1
2
3
4
5
6
7
8
XIN
B03
CE
IFIN
AOUT
2
AIN1
AIN2
D1
CL
B04
D0
B01
I01
B02
XOUT
PD1
VSS
PD2
FMIN
AMIN
AOUT1
VDD
I02
B05
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
PHASE DETECTOR
CHARGE PUMP
SWALLOW COUNTER
1/16.1/17 4bits
SWALLOW COUNTER
1/16.1/17 4bits
POWER
ON
RESET
1/2
C B
I / F
REFERENCE
DIVIDER
REFERENCE
DIVIDER
C B
I / F
2
DATA SHIFT REGISTER
LATCH
IC41 LA1835
1
2
3
4
5
6
7
8
FM-IN
DET
IF
AM.SD
V
CO-STOP
AM/FM
AM.SD
REG
AM-IF
VCC
GND
TU-LED
IF-BUFF
ST-LED
FM-SD
AM-OSC
FM-AFC
AM-RF-IN
AGC
AM.CUT
AM/FM
VCO
MPX-IN
OUT R
OUT L
AMP-IN R
AMP-IN L
R
L
AM-MIX
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
REG
GND
COMP
AGC
VCC
FM
DET
AM
IF
AM
DET
FM
IF
LEVEL
DET
TUNING
DRIVE
S-CURVE
S METER
AM/FM
IF
BUFF
PHASE
DET
STEREO
DRIVE
STEREO
SW
PILOT
DET
VCO
FF
FF
FF
AM/FM
SW
TRIG
MUTE
DECODER
ANTI BIRDIE
AM
RF.AMP
AM
MIX
AM
OSC
ALC
BUFF
AM
FM
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