— 23 —
— 24 —
6-5. IC BLOCK DIAGRAMS
IC302 NJM2185AV-TE2
IC2
TA2022AFN-EL
IC501 LA3235W
IC1
TA7371AF-EL
GND
AFC DIODE(A)
RF IN
OFC DIODE(C)
MIX OUT
VCC
OSC
RF OUT
1
2
3
4
5
6
7
8
RF
REG
MIX
OSC
8
9
10
14
13
12
2
1
3
A-CH BLOCK
11
7
6
5
4
G2
G1
V/I
WEIGHT
BIAS
CIRCUIT
+
–
+
–
GM
SUM
V+
SW
VEXT
OUT
A
DCA
DET
A
INA
GND
IREF
VREF
OUTB
DCB
DETB
INB
B-CH BLOCK: SAME AS A-CH.
37
38
39
40
41
42
43
44
45
46
47
48
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
35
36
34
33
32
31
30
29
28
27
26
25
N.C.
REF
V REF
GND
REV REC L
REV REC R
FWD REC R
FWD REC L
VCC2
MONITOR L
MONITOR R
N.C.
GND
MIC IN L
NF L
RADIO IN L
MIC IN R
NF R
RADIO IN R
MIC OUT R
MIC OUT L
REC IN L
REC IN R
N.C.
N.C.
REC MUTE
MIC/RADIO
FWD/REV
REC/PLAY
CONT F
CONT A
(FWD)
PLAY(REV)
(REV)
PLAY(FWD)
PLAY(FWD)
(REV)
(REV)
PLAY(FWD)
PLAY
REC
CONT B
CONT C
CONT D
CONT E
N.C.
N.C.
MIC REG REF
MIC REG
REC BIAS REG REF
REC BIAS REG
OSC
BASE
VCC1
VCCRF
ALC
GND
N.C.
SYSTEM CONTROL
V REF
REV
REC
AMP
FWD
REC
AMP
MONITOR
AMP
DET
MIC
REGULATOR
REC BIAS REGULATOR
ALC
AMP
L
ALC
AMP
R
VCC2
( ):REC
VREF
OSC
VCC
GND
IF OUT
IF REG
SP OUT
1
2
FM IF IN
MIX
3
4
5
AM IF IN
QUAD
AGC
6
7
8
9
10
11
12
ROUT
LOUT
ST IND
13
14
15
MPX IN
PILOT IN
DET OUT
IW SW
AM RF IN
20
21
22
23
24
LPF 2A
LPF 2B
18
19
LPF1
VCO
16
17
STOP
PULSE
OSC
AGC
MIX
FM
IF
AF
AM
IF
AM
IF
FM DET
SWITCH
AM DET
DIVIDE
DECODE
PRE
VCO
0
90
FM
AM
PILOT
ST
IND
ø
ø
IC301 TA2123AF (EL)
IC601 MM1279XVBE
PRE A
PRE B
MIX
PW B
PW A
PW C
BST
MT TC
BASE
RF IN
PW GND
OUT B
OUT C
OUT A
VCC
RF OUT
VREF OUT
BST NF
BST OUT
PW IN C
LPF
EQ A
PW NF A
PW IN A
PW IN B
PW NF B
3
IN A-R
5
PRE NF-A
6
PRE OUT A
7
MTL DRV A
8
MTL DRV B
9
PRE OUT B
10
PRE NF-B
11
AMS IN
12
IN B-R
4
IN B-F
2
IN A-F
1
21
20
19
18
17
GND
16
AMS DET
15
AMS MIX
14
AMS SW
13
22
23
24
38
C-AMP SW 37
PW SW 42
MT SW 41
F/R SW 44
BST SW
43
M/N SW 46
PRE GND 47
VREF IN 48
PRE SW 45
AMS OUT 40
BEEP 39
26
27
28
29
30
31
32
33
34
DET
36
AGC IN
35
+
–
+
–
+
–
+
–
+
–
+
–
EQ B
25
RIPPLE
FILTER
AGC
DET
BEEP
VREF
SWITCH
COMPARATOR
MTL DRV
V
1
PW
2
W
3
GND
4
OSC
5
DR
6
VREF
7
START
8
VSP
9
IN+ 10
PV
20
U
19
PU
18
GND
17
VCC
16
FC
15
TC1
14
TC2
13
RI
12
OUT
11
MOTIVE
CONTROL
CIRCUIT
MOTIVE/
OSC
MOTIVE
LOGIC
SOFT SWITCH
PRE DRIVER
INVERTER
BIAS
REFERENCE
VOLTAGE
SPEED
CONTROL
CURRENT
CONTROL
OUTPUT
BIAS
+
–
