Sony ST-EX880 Service Manual page 17

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• IC Block Diagrams
– MAIN Board –
IC1 LA1835
30 29 28
ALC
AM AM
OSC MIX
BUFF
S METER
AM/FM
LEVEL
S-CURVE
DET
FM
FM
DET
IF
1 2 3
TE
L 13942296513
IC51 LC72130
24 23 22 21
REFERENCE
DIVIDER
2
C B
I/F
1 2 3 4 5 6
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27 26 25 24 23
AM
RF. AMP
AGC
FM AM
IF DET
IF COMP
BUFF
AM/FM
TUNING
DRIVE AM
FM
REG GND
4 5 6 7 8
20 19 18 17 16
PHASE DETECTOR
CHARGE PUMP
UNLOCK
POWER
DETECTOR
ON
RESET
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS PROGRAMMABLE
DRIVER
DATA SHIFT REGISTER LATCH
7 8 9 10
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i
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8
20 19
22 21
DECODER
ANTI BIRDIE
STEREO
SW
STEREO
DRIVE
TRIG
FF FF FF
VCO
PILOT
DET
PHASE
SW DET
VCC
9 10 11 12 13
Q Q
3 6 7 1 3
15 14
13
1/2
UNIVERSAL
COUNTER
11 12
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– 27 –
2 9 9 4 2 8
18 17 16
MUTE
14 15
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9