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SCHEMATIC DIAGRAM-3
:FM SIGNAL LINE :AM SIGNAL LINE
MAIN(TUNER) CIRCUIT :POSITIVE VOLTAGE LINE :FM OSC SIGNAL LINE :AM OSC SIGNAL LINE
TUNER PACK CIRCUIT
Z120 FM FRONT END (RAL0029) Q2
Q1A 2SC2786MTA L2
C3 FM MIXER
2SK544F-AC 2.2P
0.47 H
RF AMP 7
C1A
SVC211SPA-AL
390
D
R6
5.6P
1.2 H
G
5.6P
3.3P
L11
L1
JK101
D2A
FM ANT SVC211SPA-AL S
100K
560K
R2
1
R5
1000P
C5
C6
180P
C11
L12
D1A
C4
75
1000P
C2A
R3 R103
220 270
GND 2 6
16V10
C102
C101
3
0.01
100K
R1A
390
R9
R4 R8
R10
390
4 100K 680K R11 C10
5 680K 18P
C7
4.7P
2.7K
R7
C8
SVC211SPA-AL
3.3P
2.2P
L10
C9 Q3
D3
2SC2787FL1TA Q4
LOCAL OSC 2SC2787FL1TA
BUFFER AMP
8
L102
0.39 H
AM ANT A
EXT Z101
B
LOOP
C
0.39 H
L101
AM ANT AM OSC
R110
1K
0.047
C107
C108
100K
R112
8P
D R111
390
1000P
C136
A
16V22
C125
R128
82
B
6.3V100
UDZSTE175R1B
1000P
C132
C130
R113
10K
R114
1000P
D101
R151
R117
C113
5.6K
47K
82
560 25V4.7
R129
R115 C111
C110
0.01
R152 27K
0 C
C134
C133
27P
27P
X103 C112 R116 C124
(7.2MHz) 0.01 1K 100P
D
2.6V 1.3V 0.9V 0.9V 5.2V 0V 2.5V 0V 0V
2.6V 3V 0.9V 0.9V 5.2V 2.5V 0V 0V 0V
20 19 18 17 16 15 14 13 12 11
VDD
A IN
IF IN
X OUT
A OUT
PD
FM IN
AM IN
Vss
MONO
IC102
LC72131MDTRM
PLL FREQUENCY
STRQ
SYNTHESIZER
X IN
SDC
CE
CL
DO
AM
LW
FM
DI
1 2 3 4 5 6 7 8 9 10
2.6V 0.6V 0V 0V 5.2V 4.7V 4.3V 0V 0.1V
2.6V 0.6V 0V 0V 5.2V 0.2V 4.6V 0V 14.7V
E
R130 R132
10K 10K
R138 R133
3.3K 1K
F
R137
R136
R135
R134
470
1K
1K
1K
A B C D
SCHEMATIC DIAGRAM-4
:POSITIVE VOLTAGE LINE :FM SIGNAL LINE :AM SIGNAL LINE :AM OSC SIGNAL LINE
R104 R107
1K 330
C103
0.01
R106 CF202
470K 1 3
0V
CF201 C104 0V 10.3V
1 3 1000P
0.7V Q106
2 KRA102MTA
POWER SUPPLY
R105
470
Q101 (FM:ON)
2SC2058SPTA FM +B LINE
2 FM IF AMP 0V 14.8V
14.7V 14.8V
14.8V
14.5V
16V10
C120
R143
22K
C138
0.01
14.7V
2.8V
0.033
C116
R121
22K
IC101
4.7K 25V4.7
LA1833NMNTLM
680P
R102 C139
R123
68K
FM/AM IF AMP,
DET/AM OSC,MIX/FM MPX
C119
A
C142 R142
25V4.7
D 50V1 6.8K
47K
50V3.3
1000P
A
C114
C109
3300P
R118
3.3K
4700P
C144
150P
C118
0.01
R146
100K
R120
C115
C141 R141
B 50V1 6.8K
C137
C131
C B
4700P
C143
C117
0.01
R145
100K
4.7V 6.1V 2.1V 2.1V 0.7V 1.2V 2.4V 2.1V 2.1V 2V 1.8V 1.8V
4.4V 5.9V 2.4V 2.4V 0.3V 0V 2.4V 2.1V 2.1V 2V 1.8V 1.8V
24 23 22 21 20 19 18 17 16 15 14 13
OSC
AFC
AM RF IN
AGC
AM OUT
PILOT IN
OSC OUT
MPX IN
DET OUT
PILOT OUT
Rch
Lch
AM MIX OUT
FM IF IN
AM IF IN
FM DET
FM/AM
MONO
STRQ
REG
GND
Vcc
SD
ST
1 2 3 4 5 6 7 8 9 10 11 12
2.1V 5.8V 2.1V 2.1V 5.3V 5.2V 3.6V 5.8V 0V 4.7V 3.4V
2.1V 6.1V 2.1V 2.1V 5.3V 5.2V 4.7V 6.1V 0V 1.2V 4.3V
R124
C126
16V22
33
C127
C122
1
50V1
R119
4.7K
C106
0.01
50V0.47
C121
X102
R127
470
Z102
C123
50V1
R122
2.7K
1 4 1 3
2
3 6
2
R131
68
7.3V
7.7V
6.3V100
C149
C129
14.5V
14.8V
0.1
D F C E B A
R125
470
R126
1K
A
1000P
C147
C148
A
0.01
B B
C
D
A
1 2 3 4 5 6 7 8 9 10 11
+B(4)
+B(3)
DO
CL
DI
CE
SD
STEYE
Rch OUT
Lch OUT
GND
TO
MAIN(CONTROL)CIRCUIT( B )
ON SCHEMATIC DIAGRAM-17