Sony HCD-RX80, Service Manual, Page: 52 / 90

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IC Block Diagrams
IC21 LC72130 (TCB BOARD)
PHASE DETECTOR
CHARGE PUMP
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS PROGRAMMABLE
DRIVER
UNIVERSAL
COUNTER
REFERENCE
DIVIDER
POWER
ON
RESET
1/2
C
2
B
I/F
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14
13
12 11
21 22 23 24
XOUT VSS AOUT2 AIN2 PD2 PD1 AIN1 AOUT1 VDD FMIN AMIN IO2
XIN
D0
CL
D1
CE
BO5 BO1 BO2 BO3 BO4
IO1
IFIN
UNLOCK
DETECTOR
DATA SHIFT REGISTER LATCH
ALC
BUFF
AM
OSC
AM
MIX
AM
RF. AMP
AGC
S METER
LEVEL
DET
FM
IF
AM
DET
S-CURVE
AM/FM
IF
BUFF
REG
TUNING
DRIVE
COMP
GND
AM/FM
SW
VCC
PHASE
DET
PILOT
DET
VCO
FF
STEREO
DRIVE
TRIG
STEREO
SW
MUTE
FF FF
FM
IF
FM
DET
DECODER
ANTI BIRDIE
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16
15 14 13 12 11
21 22 23 24 25 26 27 28 29 30
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
VCO-STOP
ST-LED
AM/FM
AM. SD AM. SD
IF-BUFF
VCC
DET
FM-IN
AM-MIX
IF
REG
AM-IF
GND
TU-LED
FM
AM
IC41 LA1835 (TCB BOARD)