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HCD-VX555/VX555J
6-29. IC BLOCK DIAGRAMS
IC11 LA1845 (MAIN BOARD)
LEVEL
IC51 LC72131 (MAIN BOARD)
IC105 BU4052BCF-E2 (MAIN BOARD)
0
Y0
1
2
Y1
2
Y
3
3
Y3
4
1
Y1
5
INH
6
VEE
7
VSS
8
58
24
23
22
21
20
ALC
AM
AM
AM
PF.AMP
OSC
MIX
BUFF
AGC
AM
IF
AM/FM
DET
IF
COMP
S-CURVE
BUFF
TUNING
FM
FM
DRIVE
IF
DET
REG
GND
1
2
3
4
5
20
19
18
17
16
PHASE
DETECTOR
CHARGE PUMP
REFERENCE
UNLOCK
DIVIDER
DETECTOR
SWALLOW COUNTER
1/16, 1/17 4BITS
CCB
INTERFACE
1
2 3 4 5
16
VDD
2
15
X2
1
14
X1
X
13
0
12
X0
3
X3
11
SELECT A
A
10
SELECT B
B
9
19
18
17
16
DEOODER
ANTI-BIRDIE
P-DET
STEREO
AM
ø
SW
DET
VCO
FF
304kHz
38k
V
CC
6
7
8
9
15
14
POWER
1/2
ON
RESET
12BITS
PROGRAMMABLE
DRIVER
DATA SHIFT REGISTER LATCH
6 7 8 9
10
IC302 µPC1330HA (MAIN BOARD)
2
1
SW R1 GND
15
14
13
PILOT
CANCEL
FF
FF
PILOT
π
19k
19k 0
DET
2
10
11
12
13
11
12
UNIVERSAL
COUNTER
INVERTER
COMPARATER
3
4
5
6
7
8
SW P1 CONT GND
VCC
SW P2 GND
9
SW R2
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