Aiwa NSX-SZ4 Service Manual page 21

IC, LA1844L-A
24 23
ALC
AM AM
OSC MIX
BUFF
LEVEL
DET
S-CURVE
FM
FM
IF
DET
REG
1 2
IC, BU1920FS
100kΩ
1
MUX
Vref 2
14
VDD
16
RESET
VSS 5
8
XI
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22 21 20 19
AM
RF. AMP
AGC
AM
AM
DET
IF
AM/FM
COMP
IF
BUFF
TUNING
DRIVE
GND
3 4 5
6
–
+
PLL
PLL
57kHz
1187.5HZ
RDS/ARI
REFERENCE
CLOCK
7
XO
18 17 16
DECODER
ANTI-BIRDIE
P-DET
STEREO
Ø
SW
VCO
FF
304kHz
38k
Vc
7 9
8
FO CMP
4
8TH SWITCHED
CAPACITOR FILTER
DIFFERENTIAL
BI-PHASE
DECODER
DECODER
TEST CIRCUIT
15
6
T1
T2
27
15 14 13
PILOT
CANCEL
FF
π FF
PILOT
19k
19k 2 DEL
10 11 12
3
13 ARI
10
RCLK
12 QUAR
11 RDATA
9 T57