CFS-929SMK2
20
20
IC1 CXA1538S
• IC Block Diagrams
30
3
2
1
4
5
6
7
8
9
10
13
12
14
15
11
VCO
PD 1
PD 2
DECODE AMP
1/2 COUNTER
REGULATOR
FM FE
AM FE
TUNING IND
RIPPLE FILTER
AM IF/DET
FM IF/
DISCRI
MUTING
MULTIPLEX
REGULATOR
MO/ST
SW
AUTO
BLEND
DETUNE
MUTING
CONTROL
29
28
27
26
25
24
23
22
21
20
19
18
17
16
DC
AMP
BU
AMP
BU
AMP
GND
PLL LPF2
PILOT DET
LPF2
PILOT DET
LPF2
PLL LPF1
RCH OUT
LCH OUT
ST IND/
VCO CHECK
VCC
RIPPLE
FILTER
AGC AFC1
AGC AFC2
GND
TUNE IND
FM IF IN
AM IF IN
BAND SELECT
VCO
MUTE
REG
AFC
MPX REG
FM DISCRI
AM OSC
FM OSC
FM RF
AM RF IN
FM RF IN
FE GND
FM/AM
FE OUT
DC
AMP
ST
MO
REC EQ
REC EQ
LOGIC
32
1
2
3
4
5
6
7
8
9
10
11
12
13
15
16
14
31
30
29
28
27
26
25
24
23
22
21
20
18
19
17
BIAS IN
LINE-OUT-R
LINE-OUT-L
CD-IN-R
CD-IN-L
RADIO-IN-R
RADIO-IN-L
MIC-IN
A-L
B-L
B-R
TR-B
TR-C
TAPE-MODE
FNC
LPF-L
LPF-R
τ
BIAS
GND
VCC
REQ-EQ-L
REC-EQ-R
REC-NF-L
REC-NF-R
TAPE-NF-L
TAPE-OUT-L
A-R
TAPE-NF-R
TAPE-OUT-R
MIC/HS
MIC-NF
HS:1.40V OUT
(LOW IMP.)
NOR:0.35V OUT
(HIGH IMP.)
ECM:OPEN
MIC:LOW
τ
IC301 BA3426AS
BASS
TREBLE
TREBLE
BASS
22
19
16
21 20
18
17
FLAT
FLAT
FLAT
FLAT
MIX
MIX
VREF
15
MUTE
τ
14
RR
ANALOG SWITCH
13
VCC
12
GND
REGULATOR
1
2
3
4
5
6
7
9
8
10
11
RCH IN
RCH NFB1
RCH BASS
RCH TREBLE
RCH NFB2
RCH OUT
CLASSIC
ROCK
JAZZ
POPS
FLA
T
GND
VCC
RIPPLE
REJECTION
MUTE
τ
REF VOL
TAGE
LCH OUT
LCH NFB2
LCH TREBLE
LCH BASS
LCH NFB1
LCH IN
3
2
1
5
7 8
10
4
6
9
11
13
12
14
RIPPLE FILTER/
STARTING TIME
IN1
PRE GND
IN2
STAND BY
SIGNAL MUTE
VCC1
VCC2
+OUT2
PWR GND2
-OUT2
-OUT1
PWR GND1
+OUT1
CH 1
CH 2
IC303 LA4663-B
IC302 AN7338K
