Technics ST-HD501

13
2
CN102B
CB
24 23 22 21 20 19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
FM IF IN
AM MIX OUT
REG
AM IF IN
GND
SD
ST
FM DET
Vcc
STRQ
FM/AM
MONO
OSC OUT
OSC
AFC
AM RF IN
AGC
AM OUT
DET OUT
PILOT IN
MPX IN
PILOT OUT
Rch
Lch
Z102
1
2
3
4
6
1
2
3
10K
10K
BADFCE
R127
470
C122
50V1
R122
2.7K
C121
50V0.47
C123
50V1
R131
68
C149
0.1
C147
1000P
R125
470
R126
1.5K
C148
0.01
R124
270
X102
AB
C106
0.01
C126
0.047
C127
16V22
C129
6.3V100
R119
10K
C117
0.018
C141
50V1
R141
1K
R145
100K
C143
4700P
B
A
C144
4700P
R146
100K
R142
1K
C142
50V1
C118
0.018
C137 4700P
C131 100P
R123
68K
C138
0.01
C120
16V10
R121
22K
C139
4700P
R102
4.7K
C119 390P
C116
0.033
R143
22K
C115 25V4.7
R120 47K
C109
1000P
C114
50V3.3
R118
3.3K
A
D
B
C
R104
10K
C103
0.01
R109
330
C104
1000P
R105
470
CF201
R106
470K
13
2
CF202
IC101
LA1833MN
TLM
FM/AM IF AMP,
DET/AM OSC,MIX/FM MPX
Q106
UN4111TA
POWER SUPPLY
(FM:ON)
CN101B
1234567
+B(2)
SD
STEYE
VT
+B(1)
T.GND
AB
CL
DO
DI
Lch OUT
CE
Rch OUT
B
A
DA
1234567
DET
NC
To CONNECTOR CIRCUIT (CN101A)
on SCHEMATIC DIAGRAM 6
E
To CONNECTOR CIRCUIT (CN102A)
on SCHEMATIC DIAGRAM
6
E
R140
4.7K
Q110
2SC3311ARSTA
SWITCHING
R139
3.3K
SCHEMATIC DIAGRAM 4
Q102
2SC2787LTA
FM IF AMP
Q101
2SC2787LTA
FM IF AMP
R108
470K
C105
1000P
R107
330
FM
0.12V
P P
(0V)
0.7V
(0V)
12V
(0V)
14.7V
0V
(14.8V)
14.8V
(4.2V)
3.7V
2.4V 2.4V 1.2V 2.1V 2.1V 2.1V 1.9V 1.9V
(5.7V)
5.2V
(2.1V)
0V
(0.3V)
2.7V
2.1V
5.2V
(5.7V)
2.1V 2.1V 0V 0V
0V
(4.7V)
3.4V
(4.1V)
5.2V
(5.7V)
3.7V
(1.1V)
4.2V
(3.5V)
14.8V
7.3V
FM LINE
+B
:POSITIVE VOLTAGE LINE :FM SIGNAL LINE :AM SIGNAL LINE :AM OSC SIGNAL LINE
7.3V1.6V
3V
(1.9V)
(1V)
(0V)
0.7V
(0V)
12V