Sony Walkman SRF-S84 Service Manual page 9

IC BLOCK DIAGRAMS
r
IC1 CXA1129N-T4
30 29 28 27 26
FM/TV
FM/TV
RF AMP
FM/TV
MIX
MIX 1
MIX
2
FM/TV
FM/TV
1ST LOCAL
OSC
AGC
AM
RF AMP
1 2 3 4 5
IC2 LA3550M-TE-L
IN1
1
IN2 2
HP1
3
HP2 4
LP-IN
5
6
LP-GAIN
LP-OUT
7
25 24 23 22
FM/TV
FM/AM
OVER LOAD LOCAL FM/TV
AGC SELECT
OSC
0
FM
1/2
π/2
COUNTER DISCRI
FM
FM
PSN
LIMITTER
1 LPF
AMP
AM IF AMP
PSN AM
2 BPF (FM TUN IND)
AM
DET
AGC
AFC
AF AMP DETUNE TUNING
IND
LPF DET
6 7 8 9 10
OUT1
14
13 OUT2
DET-IN
12
11 DET-OUT
REF
10
9
VCC
ON/OFF
GND
8
21 20 19 18
38KHz
VCO
VCO LEVEL
CONTROL
SEP
BUFF
CONTROL
AMP
MUTE
DC
ST.
DECORDER AMP
PD
INPUT
BUFF
SYNC
DET
11 12
IC3 LA4535M-TE-L
POWER
POWER 1
SWITCH
SWITCH
IN-1 2
PRE-GND
3
IN-2 4
REF
BIAS
5
SRF-S84
17 16
R CH
L CH
AMP AMP
LOAD
SELECT
38KHz
1/2
COUNTER
19KHz
π/2
19KHz
0
FM/AM
FM/AM
SELECT
M/ST.SW
ST.IND
13 14 15
MUTE
10
SWITCH
AMP1
9
8
AMP2
7
6
MUTE
SWITCH
OUT-1
POWER GND
OUT-2
VCC
9