Carvin CX-1272 Schematic
ODD CHANNELS ONLY
47K
1.5K
22K
1.5K
2.2K
2.2K
4.7K
47K
PHANTOM BUSS
PHANTOM BUSS
MONITOR OUT
L TAPE SEND
R TAPE SEND
20dB ATTN.
EFF2 SEND
EFF2/TAPE
EFF2/TAPE
EFF2/TAPE
DSP SEND
L/R MAIN
L RETURN
R RETURN
MONITOR
+15VDC
-15VDC
+15VDC
+15VDC
1N4003
+15VDC
.047µF
P10.A
P10.B
A13.A
L OUT
R OUT
250Hz125Hz
.0047
5.62K
2.21K
2.21K
.001
.022
LEVEL
A16.A
A14.A
250Hz125Hz
.0047
5.62K
POWER
680pF
82pF
82pF
RIGHT
RIGHT
4.7K
4.7K
4.7K
4.7K
J3.B
J3.D
A3.A
A3.B
A4.A
A4.B
A5.A
A5.B
A6.B
A6.A
A7.A
P8.A
P8.B
P9.A
P9.B
J3.A
J3.C
A9.A
A9.B
B50K
B50K
B50K
56pF
B50K
56pF
B50K
150K
470Ω
B50K
150K
470Ω
B50K
82pF
470Ω
82pF
N/U
N/U
470Ω
60Hz
2.4K
2.2K
.022
150K
300K
2.2K
220K
A1.A
A2.A
A1.B
82PF 82PF
300K
S1.A
27PF
27PF
300K
S1.B
B50K
B50K
B50K
3.3K
B50K
39PF
.047
.047
LINE
R106
R105
C106
C105
60Hz
2.4K
.022
150K
2.2K
220K
150K
150K
LEFT
B50K
100K
100K
150K
LEFT
150K
150K
B50K
B50K
H2.C
H2.F
H2.AH2.B
22K
4.7K
22K
4.7K
10K
10K
C31
C32
C33
C35
C34
C47
C38
C41
C44
C46
C48
C49
R24
R34
R45
R31
R36
R37
R38
R39
R55
R56
R54
R58
P12
MONEFF
R46
R50
R48
R47
R52
C39
C42
R51
P20 P21
R71
R70
R73
C71
C70
R72
C73
C72
P25
R83
R82
C83
C82
22K
22K
10K
10K
C45
B10K B10KB10K
.47
.22
.01
R10
R11
R12
R13
R15
R16
R17 R18
R20R19
R21
R22
C10
C11
C12
C14
C15
R14
MID
LOW
22K
47K
MIC
C13
P30 P31
R94
R93
C94
C93
C96
C95
P35
B10K B10K
.47
.22
.01
R53
R57
C16
R35
R32
150K
TOP
R63
R62
R25
JMP
P13
R40
R27
R28
EFF
MON
C53
C54
470
470
R29
R49
C17
.1
.1
J8
J9
10
10
10
10
10
10
10
R1
R3
R4
R7
R6
R8
R9
C3
C4
C1 C2
C6
C7
C8
C9
P1
P2
P3
P4
J1
1%
10
10
1%
1%
10
HI
10
cw
cw
cw
J2
R5
C5
10
10
R2
1%
10
J4
J5
1K
D1
1K
D2
D4
1K
S4
P5
P6
0Ω
0Ω
+
+
+
2
–
3
+
1
6
–
5
+
7
2
–
3
+
1
6
–
5
+
7
2
–
3
+
1
6
–
5
+
7
6
–
5
+
7
2
–
3
+
1
2
–
3
+
1
L
+
+
2
–
3
+
1
2
–
3
+
1
6
5
+
2
–
3
+
1
2
–
3
+
1
6
–
5
+
7
+
21
3
2
–
3
+
1
2
–
3
+
1
R
R L
+
+
B
B
B
1N4003
R23
R44
R59
470Ω
DSP CLIP
2.2K
D11
10K
D12
+15VDC
Q4
2N5550
RED
C30
10
C37
10
22K
R64
22K
R26
22K
R60
H2.D
H2.E
22K
R33
22K
R65
680pF
C36
R30
680pF
C29
B6 B7
A7.B
6
–
5
+
7
H2.G
H2.H
S2.B
10K 15K
0.001
C20
R41 R42
cw
cw
PAN
10K
R43
A8.A
2
–
3
+
1
R66
22K
R67
22K
R68
10K
A8.B
6
–
5
+
7
R69
10K
R80
10K
S2.A
J7
INSERT
J6
INSERT
-15VDC
ON A1
680pF
C21
22K
1N4003
D6
D7
.001
C22
10K
R81
A20.A
2
–
3
+
1
47K
R104
10K
R116
C23
10
YEL
RED
P7
B
A
CHANNEL 1-12 FOR CX1272
CHANNEL 1-8 FOR CX872
R117
10K
C24
0.1
D8
D9
C26
330PF
B
C27
330PF
B
B10K
R129
1.5K
R49
1.5K
R121
0Ω
R150
1.5K
10KR61
+
+
C25
470 /25V
B
C28
10
12340 WORLD TRADE DR.
SAN DIEGO, CA 92128
RIGHT CHANNEL OUT
LEFT CHANNEL OUT
(619) 487-1600
FAX 487-6629
REVISED BY:
APPROVED:
DRAWN BY:
470 /25V
470 /25V
UNREG +
PROTECT
L OUT
R OUT
GROUND
GNDDIG
+15VDC
-15VDC
-15VDC
+15VDC
GNDDIG
A10.A
A11.A
A12.A
A13.B
A19.A
A10.B
A11.B
A12.B
500Hz
.0022
250PF
.0068
.0033
.0047
330PF
A15.A
A16.B
A17.B
A19.B
A18.A
A14.B
A15.B
A17.A
A18.B
.0022
250PF
.0068
.0033
.0047
330PF
DATE:
DATE:
ASSY.
DATE:
ARVIN
.001
.001
A9.B
R115
330PF
C114
R114
150K
470Ω
470Ω
150K
2.2K
1.8K
2.2K
360K
.033
.001
110K
180K
.068
2.4K
.022
.001
130K
2.2K
R100
C100
R102
R101
C102
C101
R108
R107
C108
C107
R110
R109
C110
C109
R112
R111
C112
C111
C113
R113
330PF
2.2K
2.2K
1.8K
2.2K
300K
360K
.033
.001
110K
180K
.068
2.4K
.022
.001
130K
2.2K
110K
110K
H1.A
H1.J
H1.B
H1.F
H3.C
H1.G
H1.E
H1.D
H1.C
R103
REV:
REV:
P22 P23 P24
R75
R74
C75
C74
R77
R76
C77
C76
R79
R78
C79
C78
P26 P27 P28
R85
R84
C85
C84
R87
R86
C87
C86
R89
R88
C89
C88
C90
R90
R92
J10
J11
B10K B10K B10K
16K
10K
C91
R91
B10K B10K B10K
91K
EFF MON
P32 P33 P34
R96
R95
R98
R97
C98
C97
R99
C99
P36 P37 P38
B10K B10K B10K
16K
10K
B10K B10K B10K
91K
TOP
C18
C19
D10
NO:
PCB
NO:
2K
2K
1K 4K
10
10
2K 8K
1K 4K2K 8K
1K
2
–
3
+
1
2
–
3
+
1
2
–
3
+
1
6
–
5
+
7
2
–
3
+
1
–
+
7
6
–
5
+
7
6
–
5
+
7
6
–
5
+
7
2
–
3
+
1
6
–
5
+
7
6
–
5
+
7
6
–
5
+
7
2
–
3
+
1
6
–
5
+
7
6
–
5
+
7
2
–
3
+
1
6
–
5
+
7
FOR CX1272 PCB# 30-12724
FOR CX872 PCB# 30-08724
B
4. FOR RACK MOUNT UNITS; CUT RESISTORS: R29, R49, R121.
3. ALL DIODES ARE TYPE 1N4003, EXCEPT AS NOTED.
2. ALL CAPACITORS IN MICORFARADS, EXCEPT AS NOTED.
1. ALL RESISTORS IN OHMS
NOTES: UNLESS OTHERWISE SPECIFIED.
COMM
B
++
ENC1
00001
00011
00010
RIGHT CLIP
LEFT CLIP
D5
RED
D3
RED
RED
R118
10Ω
10ΩR119
N/UH3.A
GROUNDH3.B
H3.D
H5.A
H5.B
H5.C
H5.D
H5.E
H5.F
H5.G
H5.H
H5.I
H5.J
H1.H
H1.I
REVISIONS FROM Rev (C)
PARTS ADDED: D8, D9, C22, C25,
C26, C27, C28,
R61, R118, R119, R121,
R129, R149, R150
VALUE CHANGES: R12, R13, R14,
VALUE CHANGES: R31, R34, R41,
R15, R17, R19, R62,
C9, C10, C24
REVISIONS FROM Rev (D)
MODIFIED FOR DSP 80-56004
R42, R129, R149,
R150, C20
C
CX1272 & CX872
SYSTEM MASTER & CHANNELS
C. McEUEN
30-12724
30-08724
80-12724
80-08724
C. McEUEN
1DEC94
13MAR98
D
E
E
E
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