1
1
2
2
3
3
4
4
5
5
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6
D D
C C
B B
A A
1
200 Scenic View Dr.
Cumberland, RI 02864 78/4/2020
Sheet: of
NK49-Analog-Inputs.SchDoc
NK49-MAIN.PrjPcb
Originally Drawn By:
Project:
Sheet:
Variant: Production
Last Modified By:
Last Modified:
Copyright 2019, inMusic Brands
All Rights Reserved
Rev I
AUX_LEFT 2
MIC1
GND
1.21K
R110
1.21K
R115
200
R91
200
R92
15.0K
R96
3.74K
R100
3.74KR106
1.24K
R103
2.49K
R99
2.49KR94
1.00K
R112
1
3
2
D5
MMBD4148SE
10uF
10V
C78
47uF
10V
C88
120pF
50V
C89
47pF
50V
C94
47pF
50V
C90
12pF
50V
C81
1
23
Q2
2907A
1
23
Q1
2907A
1
2
3
+
-
G
5
9
6
10
7
11
T
R
S
8
4
J3
COMBO-XLR-TRS
GND
120pF
50V
C91
100 R117
100R108
-8V0
+8V0
1.00K
R113
-8V0
GND
GND
+8V0
-8V0
0.1uF
50V
C82
0.1uF
50V
C86
GND
+8V0 -8V0
+8V0 -8V0 2.21K
R121
2.21K
R119
MIC2
GND
1.21K
R142
1.21K
R148
200
R124
200
R125
15.0K
R128
3.74K
R133
3.74K
R138
1.24K
R135
2.49K
R130
2.49KR126
1.00K
R144
1
3
2
D12
MMBD4148SE
10uF
10V
C99
47uF
10V
C109
120pF
50V
C110
47pF
50V
C114
47pF
50V
C111
12pF
50V
C102
1
23
Q10
2907A
1
23
Q9
2907A
1
2
3
+
-
G
5
9
6
10
7
11
T
R
S
8
4
J5
COMBO-XLR-TRS
Z6
2,200pF
Z5
2,200pF
120pF
50V
C112
100 R149
100R141
-8V0
+8V0
1.00K
R146
-8V0
GND
GND
+8V0
-8V0
0.1uF
50V
C103
0.1uF
50V
C104
GND
MIC GAIN = 25 dB (18.6x)
MAX INPUT = 0.106 Vrms
2.21K
R153
2.21K
R151
AUX LEFT AUX RIGHT
PH/LN 1L 2
PH/LN 1R 2
MIC1+ 2
MIC1- 2
MIC2+ 2
MIC2- 2
1
23
Q4
BC860BMTF
1
23
Q5
BC860BMTF
1
23
Q6
BC860BMTF
1
23
Q7
BC860BMTF
1
23
Q12
BC860BMTF
1
23
Q13
BC860BMTF
1
23
Q14
BC860BMTF
1
23
Q15
BC860BMTF
Z4
2,200pF
Z3
2,200pF
Z1
2,200pF
5.11K
R85
220pF
50V
C74
220pF
50V
C76
5.11KR83
5.11K
R89
5.11K R87
GND
GND
Z2
2,200pF
5.11K
R86
220pF
50V
C75
220pF
50V
C77
5.11KR84
5.11K
R90
5.11K R88
GND
GND
+8V0
-8V0
0.1uF
50V
C118
0.1uF
50V
C123
GND
+8V0
-8V0
0.1uF
50V
C119
0.1uF
50V
C124
GND
+8V0
-8V0
0.1uF
50V
C120
0.1uF
50V
C125
GND
402R104
402R137
402
R101
402
R114
402
R147
402
R134
TOP
6
5
4
J2B
RCA
FB1
100R93
D6
ESD5B5.0ST1G
100pF
50V
C80
47.5K
R95
2
3
1
U11A
NJM4580M
15.0KR97
1.18KR98
39.2
R102
0.068uF
50V
C84 0.1uF, 25VC85
+
1,000uF
6.3V
C87
3
1
2
Q3
2SD2704K
1.00M
R107
S1
FB2
100R118
D10
ESD5B5.0ST1G
100pF
50V
C95
47.5K
R120
6
5
7
U11B
NJM4580M
15.0KR122
1.18K
R123
0.068uF
50V
C97 0.1uF, 25VC98
PH/LN 1 LEFT
39.2R116
+
1,000uF
6.3V
C92
1.00M
R109
3.32KR111
3.32KR105
UP: LINE / DOWN: PHONO
3
1
2
Q8
2SD2704K
Line Gain = 0dB
Phono Gain = +31.7dB @ 1kHz
0.1uF, 25VC83
0.1uF, 25VC96
+
10uF
16V
C79
+
10uF
16V
C93
SP3
8MIL
SP6
8MIL
BOTTOM
3
2
1
J2A
RCA
AUX_RIGHT 2
PH/LN 2L 2
PH/LN 2R 2
TOP
6
5
4
J4B
RCA
FB3
100R127
D13
ESD5B5.0ST1G
100pF
50V
C101
47.5K
R129
2
3
1
U13A
NJM4580M
15.0KR131
1.18K
R132
39.2
R136
0.068uF
50V
C106 0.1uF, 25VC107
+
1,000uF
6.3V
C108
3
1
2
Q11
2SD2704K
1.00M
R140
S2
FB4
100R152
D18
ESD5B5.0ST1G
100pF
50V
C116
47.5K
R154
6
5
7
U13B
NJM4580M
15.0KR155
1.18K
R156
0.068uF
50V
C121 0.1uF, 25VC122
PH/LN 2 LEFT
39.2R150
+
1,000uF
6.3V
C113
1.00M
R143
3.32KR145
3.32KR139
UP: LINE / DOWN: PHONO
3
1
2
Q16
2SD2704K
Line Gain = 0dB
Phono Gain = +31.7dB @ 1kHz
0.1uF, 25VC105
0.1uF, 25VC117
+
10uF
16V
C100
+
10uF
16V
C115
SP7
8MIL
SP10
8MIL
BOTTOM
3
2
1
J4A
RCA
BOTTOM
3
2
1
J1A
RCA
TOP
6
5
4
J1B
RCA
GND GND
PH/LN 1 RIGHT
PH/LN 2 RIGHT
2
3
1
U10A
NJM4580M
6
5
7
U10B
NJM4580M
-
4
+
8
U10C
NJM4580M
-
4
+
8
U11C
NJM4580M
-
4
+
8
U13C
NJM4580M
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
SP1
8MIL
SP5
8MIL
SP4
8MIL
ESD
D8
11CAT3G
D9
11CAT3G
ESD
D15
11CAT3G
D16
11CAT3G
SP9
8MIL
SP8
8MIL
D3
P6SMB11CAT3G
SP2
8MIL
D4
P6SMB11CAT3G
ESD ESD
ESD
ESD
ESD
ESD
+8V0
+8V0
-8V0
-8V0
MAX Line Input 4Vrms
-2.5V -2.5V
2
3
1
U12A
NJM4580M
6
5
7
U12B
NJM4580M
-
4
+
8
U12C
NJM4580M
2
3
1
U14A
NJM4580M
6
5
7
U14B
NJM4580M
-
4
+
8
U14C
NJM4580M
1
3
2
D47
BAT54S
1
3
2
D48
BAT54S
+8V0 -8V0
1
3
2
D49
BAT54S
+8V0 -8V0
1
3
2
D50
BAT54S
+8V0 -8V0
1
3
2
D45
BAT54S
+8V0 -8V0
1
3
2
D46
BAT54S
ESD
0.1uF
50V
C23
GNDESD
0.1uF
50V
C24
ESD GND must connect to earth GND via chassis bottom
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