Aiwa NSX-SZ4 Service Manual page 21

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