22
U901: LA1837
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
ALC
AM
OSC
AM
MIX
AM
RF.AMP
REG
AGC
AM IF
AM
S-METER
TUNING
DRIVE
STEREO
DRIVE
V
CC
V
CC
AM/FM
IF-BUFF
FM
S-METER
S-CURVE
AM IF
FM
DET
GND
FM IF INPUT
AM MIXER
OUTPUT
FM IF INPUT
BYP
ASS
AM IF INPUT
GND
TU-LED
ST
LED
AM-IF OUTPUT
FM DETECT
OR
AM NARROW CF
FM S-METER
OUTPUT
AM S-METER
OUTPUT
MUTE
FM/AM
SWITCH
PILOT
V
CO
SD
COMP
DET
BUFF
DECODER
ANTI-BIRIDE
3 rd 5 th
STEREO
SW
MUTE
VCO
304kHz
FF
38k
P-DET
¯
FM SD
ADJ
OSC
REG
AM RF
INPUT
AFC
AM AGC
AM DETECT
OR
INPUT
FM DETECT
OR
OUTPUT
MPX
IUTPUT
MPX
OUTPUT
MPX
OUTPUT
STEREO L
INPUT
STEREO R
INPUT
L-OUT
R-OUT
FF
19k
FF
19k
PILOT
DET
U603: NJM78M
1
INPUT
3
OUTPUT
2
GND
AMPLIFIER 1
OUTPUT
INVERTING
INPUT
NON-INVERTING
INPUT
V Ð
AMPLIFIER 2
V +
OUTPUT
INVERTING
INPUT
NON-INVERTING
INPUT
1
2
3
4
8
7
6
5
+ Ð
Ð +
U501: NJM4558D
U702, U703: NJM5532
U704: TL072CP