Technics ST-HD501

F
A
CN104A
IC302
M62433AFP
DIGITAL SOUND
CONTROLLER
CN701A
1
2
3
4
5
6
7
BA
L
M
K
CN702A
B
E
FPQJE
Q403
2SC3940AQSTA
REGULATOR
CN103A
1
2
3
4
5
6
7
Q407
2SC3311ATA
POWER SUPPLY
TP306
10K
4.7K
Q543
DTC143XSTP
INTERFACE
B
D
C
A
Q542
2SC3311ATA
INTERFACE
Q541
2SC3311ATA
INTERFACE
B
S
AB D
R
N
O
C
Z
G
I
H
1 2 3 4 5 6 7 8 9 10 11 12 13 14
TP1
C
TP307
a
W
U
Y
T
b
X
V
F
E
A
C
B
D
B
A
D
C
1
2
3
4
5
6
7
F
B
A
E
R338 22K
R340 10K R336 100K R339 10K R335 100K
R334 3.3K
R337 22K
R333 3.3K
R344 10K R343 10K
R342
1K
R341
1K
R492
150
R491
150
C492
100P
C491
100P
D491
MA4043MTA
C493
35V47
R547
10K
R406
1K
C411
16V100
R405
1/4W10
R548
330
C410
0.01
R407
220
D403
MA4082LTA
C415
0.01
R408
1K
C413
25V100
D492
MA4051MTA
R542
4.7K
R543
4.7K
R549
10K
R541
47K
R545
10K
R544
22K
R546
10K
R550
10K
D542
D541
D541,542
MA165TA
C541
50V3.3
C343 0.22 C345 0.033 C339 0.047 C341 0.047 C335 0.01 C337 0.01 C333 3300P
C331
330P
C329
16V10
C327
330P
C325
16V10
R329
4.7K
C323
1000P
C321
470P
R331
4.7K
R330
4.7K
R332
4.7K
C324
1000P
C322
470P
C326
16V10
C328
330P
C351
0.1
C332
330P
C330
16V10
C344 0.22 C346 0.033 C340 0.047 C342 0.047 C336 0.01 C338 0.01 C334 3300P
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
414243444546474849505152535455565758596061626364
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
31
32
33
34
25
35
26
36
27
37
28
38
29
39
30
40
GRAPHIC EQUALIZER
GRAPHIC EQUALIZER
BP IN
CD
TUNER
MD
TAPA
AUX H
AUX L
AVSS
AGND
AUX L
AUX H
TAPE
MD
TUNER
CD
DEL IN
BP OUT
KIN2
K OUT2
MIC IN
TAPE REC2
DPL2
VOL IN2
VOL OUT2
MD REC2
EXT OUT2
GEQ OUT2
BB2
AV
DD
DGND
LATCH
DATA
CLK
DV
DD
PORT B
PORT A
BUF NF1
BUF IN
BB1
BUF IN2
BUF NF2
BUF OUT2
BUF OUT1
Rch
Lch
PS IN PS+IN KIN1 K OUT1 TAPE REC1 MD REC1 EXT OUT1 DPL1 GEQ OUT1 VOL IN1 VOL OUT1
CN105A
R493
10K
SCHEMATIC DIAGRAM 7
MAIN CIRCUIT
A
D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
D
C
R552 1K R551 1K
R365
10K
R366
47K
5.6V
7.2V
0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
5V
6.8V
7.2V
0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V
0V
0V
0V
0V
0V
0V
0V
7.2V
0V
0V
0V
0V
0V
0V
0V
9.4V7.3V
8V
0V
1.8V
0V
0.1V
0V
0.6V
4.2V
0V
0.2V
15V14.8V
15V
:POSITIVE VOLTAGE LINE :FM SIGNAL LINE :AM SIGNAL LINE:NEGATIVE VOLTAGE LINE
0V