NKC6IOA13A.sch
NKC6 IO PCB
16 Jul 2008
MS/CN/RE/DM
9-79-0571-A-0
9-40-0571-A
NUMARK
ASSY NUMBER:
1
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5
6
D
C
B
A
C
D
B
A
COMPANY:
TITLE:
PART NUMBER:
FILENAME:
SCALE:
RELEASED:
DRAWN:
DATED:
DATED:
SIZE:
SHEET:
OF
5
4
C
IPOD DIFF AMPS
Gain = 0.9Vrms to +2.0dBV
Gain = 1.4 = +2.9dB
POSITIVE PHASE
AT THIS POINT
(output from iPod is negative phase)
Gain = +2.0dBV to 0.6Vrms
Gain = -6.44dB
IPOD INPUT
IPOD OUTPUT
AUD_L_IN
AUD_R_IN
AUD_OUT_L
AUD_R_OUT
IPOD_DET
AUD_RET
GND
GND
FROM IPOD
IPOD
DOCK
Vref = 1.8V
Limits at Vbias + schottky drop
0.9V + 0.35V = 1.25V = 0.88Vrms
Vbias = 0.9V
Copyright (c) 2010 Numark
Route AUD_RET to minimize
coupling with other traces
R69
6.65K 1%
R77
6.65K 1%
R53
6.65K 1%
R48
6.65K 1%
5
+
6
-
7
U12-B
NJM2112
3
+
2
-
1
U12-A
NJM2112
Q11
2SD2114K
1
2
3
Q5
MBT4403
R58
1.00k 1%
R71
10k 1%
1
2
3
Q6
MBT4403
R59
1.00k 1%
R72
10k 1%
Q10
2SD2114K
R107
1.00k 1%
R109
1.00k 1%
R108
10k 1%
R106
10k 1%
R79
100 ohm 1%
R47
100 ohm 1%
R70
100 ohm 1%
R54
100 ohm 1%
D10
MMBD4148
D9
MMBD4148
C59
0.1uF
C58
0.1uF
5
+
6
-
7
U6-B
NJM2112
3
+
2
-
1
U6-A
NJM2112
C27
0.1uF
C28
0.1uF
1
2
3
D1
BAT54S
R22
20.0k 1%
R20
20.0k 1%
1
2
3
D2
BAT54S
R28
20.0k 1%
R25
20.0k 1%
R42
4.99K 1%
C19
22uF,16V
10
+
9
-
8
U6-C
NJM2112
C30
0.1uF
-v
+v
4
11
U6-E
NJM2112
12
+
13
-
14
U6-D
NJM2112
R9
2.00k 1%
C11
22uF,16V
R40
2.00k 1%
C41
22uF,16V
R21
5.36k 1%
R29
5.36k 1%
1
2
3
4
5
6
7
8
J8
-v
+v
4
11
U12-E
NJM2112
C95
10uF,16V
C97
10uF,16V
Q3
MBT4401
R26
4.99K 1%
R13
4.99K 1%
R78
9.31k 1%
R46
9.31k 1%
R75
9.31k 1%
R50
9.31k 1%
R30
6.20K 1%
R55
1.00k 1%
R1
1.00k 1%
R10
47 ohm
R41
47 ohm
-4VA
+4VA
IPOD_PLAY_R
IPOD_PLAY_L
+4VA
-4VA
+4VA
-4VA
+4VA
+4VA
-4VA
IPOD_REC_L
IPOD_REC_R
+3.3V
IPOD_DET
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