Schematic diagram – NAD C 542 User Manual
Page 14
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L302
10uH
VCC
R308
3K
R309
3K
X301
4.00M
UNLD
LOAD
XRST
XLAT
CLOK
DATA
SCOR
SYSM
RW/ROM/LDOFF
RW/ROM/LDOFF
SCLK
SQCK
1/2X
CD/CDR
DISCO
DI/SW
R331
4K
7
R332
1K
R333
4K
7
R328
4K7
R327
4K
7
R334
4K
7
SQSO
SENS
C301
33p
C302
33p
C303
0.01u
1
2
3
Q311
8050
D303
IN4148
R312
10K
R311 100K
C308
10u/16V
VCC
C304
0.1u
C305
220uF/16V
C307
47uF/10V
D+5V
VCC
DAT
1
GND
2
VCC
3
M113
REMOTE
+D5V
R313
10
C420
10uF/16V
TP301
M101
B.SCAN
M106
OPEN/CLOSE
M102
F.SCAN
M107
PREV
M103
REPEAT
M105
RANDOM
M104
TIME
M109
STOP
M108
NEXT
M110
PLAY
R303
6K2
R302
6K2
R305
2K
R304
2K
R307
1K
R306
1K
R310
3K
R301
1K
VCC
TP303
SYSM
SQSO
SENS
SCOR
DATA
CLOK
XLAT
XRST
LOAD
UNLD
SCLK
SQCK
1/2X
CD/CDR
DISCO
DI/SW
MUTE
R317
1K
R314
OPEN
R315
1K
M314
TRIG SW
AUTO
OFF
R318
470
R336
10K
D304
STANDBY
RED
GREEN
R319
560
1
2
3
Q309
8050
1
2
3
Q310
8050
R1316 4K7
D307
IN4148
K501C
RELAY SW
+10V
TP302
75/5
1
P74/AN4
2
P73/AN3
3
P72/AN2
4
P71/AN1
5
P70/AN0
6
P61/CT02
7
P60/CT1
8
P47/1NT2
9
/RESET
10
P91/XOUT
11
P90/XIN
12
VSS
13
XIN
14
XOUT
15
VCC
16
P46/T3OUT
17
P45/T1OUT
18
P44/PWM1
19
P43/BUZ01
20
P42/INT3
21
P41/INT1
22
P40/INT0
23
P87PWM0/FLD39
24
P86
25
P85
26
P84
27
VEE
28
P83
29
P82
30
STANDBY
31
POWER
32
P37/FLD31
33
P36
34
P35
35
P34
36
P33
37
P32
38
P31
39
P30
40
P17/FLD23
41
P16
42
P15
43
P14
44
P13
45
P12
46
P11
47
P10
48
P07FLD15
49
P06
50
P05
51
P04
52
P03
53
P02
54
P01
55
P00
56
P27/FLD7
57
P26
58
P25
59
P24
60
P23
61
P22
62
P21/FLD1
63
P20
64
P57
65
P56
66
P55
67
P54
68
P53
69
P52
70
P51
71
P50
72
AVSS
73
VREF
74
P65
75
P64
76
P63
77
P62
78
P77/AN7
79
76/6
80
U301
MCU
-VP
VCC
F1/01
1
F1/02
2
NP
3
6G/03
4
5G/04
5
4G/05
6
3G/06
7
NC
8
2G/07
9
1G/08
10
NC
11
P1/09
12
P2/10
13
P3/11
14
P4/12
15
NC
16
NC
17
P5/13
18
P6/14
19
P7/15
20
P8/16
21
NC
22
NC
23
P9/17
24
P10/18
25
P11/19
26
P12/20
27
NC
28
P13/21
29
P14/22
30
P15/23
31
P16/24
32
NC
33
F2/25
34
F2/26
35
TP318
VFD
VFD3
VFD4
VFD5
VFD6
VFD7
VFD8
VFD9
VFD10
VFD11
VFD12
VFD13
VFD14
VFD15
VFD16
VFD17
VFD18
VFD19
VFD20
VFD21
VFD22
VFD23
VFD24
F1
F2
VFD3
VFD4
VFD5
VFD6
VFD7
VFD8
VFD9
VFD10
VFD11
VFD12
VFD13
VFD14
VFD15
VFD16
VFD17
VFD18
VFD19
VFD20
VFD21
VFD22
VFD23
VFD24
VCC
R329
4K7
R330
OPEN
R321
10K
NADLINK
REM_IN
1
2
3
Q312
8050
K502C
RELAY SW
D308
IN4148
C419
103
C310
100uF/6V3
D409
U301-P50
IN4148
1
2
3
Q402
2SD1012F
1
2
3
Q403
2SA1015
R412
4K7
R413
47K
R406
7K5
R415
7K5
1
2
3
Q401
2SA1015
R416
47K
R405 22K
C408
22u/16V
D411
IN4148
C407
2200u
16V
D403
3V3
MUTE
A+12V
R403 10K
R335
10K
VCC
1
2
3
Q307
8050
R338
10K
C403
OPEN
R322
15K
D305
IN5393
C306
0.1u
VCC
SENSOR
1
3
2
M315
TRIGGER_IN
M38B59EF
MCU
SCHEMATIC DIAGRAM