Sony ICF-CD523 Service Manual page 26

ICFCD523
• IC Block Diagrams
– MAIN Board –
IC1 CXA1238M-T6
28
30 29 27 26 25
VCO
MONO/STEREO
SELECT
1 2 3 4
IC51 BU2614FS
16 15 14 13
PHASE MAIN CONTROL
PRESCALLER
DETECT
I/O CONTROL
REGISTER
1 2 3 4 5
26
24 23 22 21 20 19 18
FM FRONT-END
AM FRONT-END
REGULATOR
MPX
REGULATOR
1/2
PD1
COUNTER
1/2
PD2
COUNTER
AUTO
BLEND
MUTING
DECORD RIPPLE
AMP FILTER
5 6 7 8
12 11 10 9
IF
COUNTER
OUTPUT
CONTROL
6 7 8
17 16
FM IF/
DISCRI
AM IF/
DET
TUNING
INDICATOR
BAND-PASS
MUTE
9 10 11 12 13 14 15
IC351 LA4629
OUTPUT
AMP
TSD
PROTECTOR
OUTPUT
AMP
STANDBY RIPPLE
SWITCH FILTER
1 2 3 4 5 6
INPUT
AMP
REF
AMP
INPUT
AMP
POP NOISE
PREVENTION
BLOCK
7 8 9 10 11 12