Sanyo DC-TS780 Service Manual page 22

IC BLOCK DIAGRAM & DESCRIPTION
IC241 LC72121M-D(PLL Synthesizer)
Vssx 2
XIN 1
XOUT 24
FMIN 17
AMIN 16
CE
3
DI
4
CCB
CL
5
DO 6
POWER
V
18
DD
RESET
Vssd 15
IC231 LA1844ML(AM/FM-ZF/MPX)
24 23
ALC
AM
OSC
BUFF
LEVEL
DET
S-CURVE
FM
FM
IF
DET
1 2
REFERENCE
DIVIDER
SWALLOW COUNTER
1/2
1/16, 1/17 4bits
12bits PROGRAMMABLE
DIVIDER
DATA SHIFT REGISTER LATCH
I / F
ON
8
7
BO1 BO2 BO3 BO4
22 21 20
AM
AM
MIX RF.AMP
AGC
AM
AM
DET
IF
AM/FM
IF
COMP
BUFF
TUNING
DRIVE
REG GND
3 4 5
9 10 11 14
IO1 IO2
19 18 17
P-DET
VCO
304kHz
6 7 8
- 21 -
PHASE DETECTOR
CHARGE PUMP
UNLOCK
DETECTOR
UNIVERSAL
COUNTER
16 15 14
PILOT
DECODER
CANCEL
ANTI-BIRDIE
STEREO
SW
FF
FF FF
38k 19k
19k
2
VCC
9 10 11
19 PD
20
AIN
21 AOUT
22 Vssa
13 IFIN
13
PILOT
DET
12