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U
V
TUNER UNIT
Q Q
FM FRONT-END
3 7 6 3 1 5 1 5 0
1
8
7
T2
8.8V
6
2
+B
+B
Q2
Q3
C10A
R7A
0.01
330
0.6V
R10A
3.3K
R8A
R14A
L2
C6A
10K
10K
2.2uH
100P
C12A
C13A
56P
33P
TC1
20P
L4
D4.5/4.5T
L1 D4.5/3.5T
3
C4A 22P
VC2
C9A
VC1
C3A
0.01
180P
R3A
5
R2A
8.3V
12K
470K
Q1
C2A
0.01
3.9V
4
R1A
4.3V
3
T E
L
1 3 9 4 2 2 9 6 5 1 3
1K
T1
4
2
1
Q1-3
:
2SC930
FM ROD ANT
5
VC1,2
:
SVC201 SPA
IC101
: LA1837
JK102
IC102
: LC72131
FM ANT
4
Q101
: 2SA1317
Q102
: 2SC930
GND
3
D101-104
: 1SS133
D105
:
MTZJ5.1B
6
VC101
:
SVC342L
GND
2
SIGNAL LINE
w w w
GND LINE
B LINE
+B
AM ANT
1
The DC voltage is an actual reading measured with a high impedance type volt-
meter as the AM/FM signal generator is specified to the conditions as shown in the
list below. The measurement value may vary depending on the measuring instru-
7
ments used or on the product. The value shown in ( ) is actual reading measured in
the AM mode.
W
X
9.4V
FM SW
R106A
Q101
100
+9.4V
9.4V
8.7V
R115A
OSC
10K
IF
1.5V
Q102
+
RF AMP
C113A
0.01
+B
CF102
0.8V
10.7MHz
CF101
Q102
10.7MHz
C112A
R133A
8.2V
0.01
330
FM/AM
/MPX
SYSTEM
IC
IC101
FM : 85MHz
4.5V
TP101
for FM ADJ.
VT
1
2
C139A
1
GND
GND
NC
ANT
C101A
0.01
C104A
330P
C164A
47P
VC101
x
a o
L101 2.2uH
.
i
Y
Z
+9.4V
+B
+B
T103
CF103
9.1V
T104
450kHz
FM DET
AM IF
C129
2.2u50
R123A
3.3K
C130
0.022u50
+
+
Q
Q
3
7
+
R153A
100
C156A
470P
0V(2.5V)
2.5V(0V)
5.2V
+B
C123
R131A
4.7u50
1K
+
T102
R132A
28
5.6K
2.5V
29
+
MW OSC
T101
+
+B
u 1 6 3
MW ANT
y
MODE
CARRIER
FREQUENCY
FM
98MHz
1kHz
AM
1000(999)kHz
400Hz
AA
AB
2
4
8
9
9
+9.4V
R107
+9.4V
10 1/4W
+
+
+
R108A
5.6K
14
R120A
5.6K
15
C133A
1
C158A
+
+
+
0.01
C132A
1
+
6
3
1
5
1
5
0
8
9
9.4V
C137A 100P
R152A 1K
IC102
PLL
0V
12
11
IF.IN
NC
0.2V
0V
13
10
(9.5V)
IF.REQ
FM
14
8.0V
NC
9
(8.1V)
15
S/M
15
AM.IN
8
16
NC
8.0V
FM.IN
7
(0.1V)
17
FM/AM
14
VDD
18
R138A
PD
1K
6
5.2V
0.8V
DO
R135A
3.3K
5
0V
CLK
19
R136A
A.IN
3.3K
4
0V
DI
4.0V
(74V)
R137A
3.3K
3
0V
20
CE
A.OUT
21
2
GND
NC
22
1
2.6V
XOUT
XIN
X101
7.2MHz
m
L102 100uH
+B
c o
R148A 1K
R129A 33K
.
MODULATION
ANT INPUT
DEVIATION
STEREO 67.5kHz 7.5kHz(Pilot)
60dB
Y39-3890-20
MONO 30% MOD
60dB
AC
AD
2
8
9
9
CAUTION: For continued safety, replace
safety critical components only with manu-
facturer's recommended parts (refer to
parts list).
indicates safety critical com-
ponents. For continued protection against
risk of fire, replace only with same type
and rating fuse(s). To reduce the risk of
electric shock, leakage-current or resis-
tance measurements shall be carried out
(exposed parts are acceptably insulated
from the supply circuit) before the appli-
ance is returned to the customer.
CN101
1
R.OUT
2
2
4
TU.GND
9
8
2
9
9
3
L.OUT
POWER
UNIT
-CN403
+9.4V
4
9.4V
4/4
B
5
ST
6
SD
7
TU.CE
8
TU.DATA
9
TU.CLK
10
PLL.DO
MDX-01/02 (2/4)
MDX-01/02
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