©2007 LOUD Technologies Inc. All rights reserved Preamp PCB Schematics PAGE 1
CA6110DG
1/06/04 - -
A
C
Plot Time:
Drawn:
REV
Sheet
INITIAL ISSUE
-
-
of 21
NONE
7/07/03
Date:
Ecr(s)/Ecn(s) Appvd by Date
5
4
A
A
B
B
C
C
D
D
E
E
Plot Date:
Checked:
Released:
F
F
-
G
G
5
4
3
1
2
SCHEM - PREAMP
3
1
2
NOTES:
Date
Drawing Number:
Class Code:
Drawing Type: Schematic
11880 Borman Drive, St. Louis, MO 63146
REM
ST. LOUIS MUSIC, INC
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
Chgd ByDESCRIPTION
AND 10 MEGOHM DIGITAL VOLTMETER.
1) CAUTION: SHOCK HAZARD!!
TOUCHING INTERNAL PARTS.
CAUTION:
Tolerance:
Drawing Title:
First Used On:
Drawing Size:
-
Signatures:
Mon Feb 02, 2004
07S559
-
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE
2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/8W-5% TOL.
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND
THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL.
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.
THAT EXPLAINED IN THE OPERATING INSTRUCTIONS.
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER
TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED
+13V
-13VP
-13VP +13VP
D49
1N914
75V PIV
+13V
D48
1N914
75V PIV
R54
1.74K
1/4W
1per
220
35V
C87
R2
1.74K
1/4W
1per
220
35V
C59
C22
10
35V
R52
4.7K
1/8W
5per
75V PIV
1N914
D11
+13VP -13VP
R6
4.7K
1/8W
5per
75V PIV
1N914
D4
+13VP -13VP
-13VP
R31
47K
1/8W
5per
10.0K
1/4W
1per
R53
10K
1/8W
5per
R9
75V PIV
1N914
D6
+13VP
10.0K
1/4W
1per
R7
C29
220 pF
100V
D42
1N914
75V PIV
R12
1K
1/8W
5per
D26
1N914
75V PIV
D47
1N914
75V PIV
+13V
C7
10
35V
CW
P1
GAIN
50K L
2.2Vrms
TP5
100K
1/8W
5per
R40
.047
C31
100V
.15
C33
50V
CW
50K L
P6
LOW
R137
10
1/4W
5per
R136
10
1/4W
5per
CW
50K L
P13
HIGH
CW
50K L
P3
LOW
10K
1/8W
5per
R42
-13VP
+13VP
R19
2.7K
1/8W
5per
4.7K
1/8W
5per
R23
10K
1/8W
5per
R21
22K
1/8W
5per
R59
C17
100 pF
200V
R17
22K
1/8W
5per
13
12 14
IC5:D
TLO-74
1.5K
1/4W
5per
R112
+13V
22K
1/8W
5per
R60
C32
56 pF
200V
R24
22K
1/8W
5per
.047
C19
100V
MAIN_BUS
R150
1M
1/8W
5per
.1
C58
50V
C21
10
35V
Q9
MPS-A13
+13V
R29
22K
1/8W
5per
R62
22K
1/8W
5per
R37
1.74K
1/4W
1per
511
1/4W
1per
R46
R1
1.74K
1/4W
1per
511
1/4W
1per
R4
D12
75V PIV
1N914
D1
75V PIV
1N914
75V PIV
1N914
D9
150
1/4W
5per
R41
150
1/4W
5per
R10
R32
10K
1/8W
5per
R33
1K
1/8W
5per
O
IC
SW7:A
TUNER SELECT
C36
10
35V
100
35V
C69
C8
56 pF
200V
D27
1N914
75V PIV
R55
22K
1/8W
5per
.047
C70
100V
47K
1/8W
5per
R39
.047
C72
100V
.047
C71
100V
6
57
IC4:B
TLO-72
.22
C13
50V
.047
C74
100V
1.5K
1/8W
5per
R20
.1
C57
50V
.0047
C15
100V
.0033
C27
100V
.0022
C16
100V
470K
1/4W
5per
R111
47K
1/8W
5per
R22
CW
P10
MID
50K L
.0033
C18
100V
2.2Vrms
TP6
10K
1/8W
5per
R27
CW
P7
MID
50K L
D38
RED
R61
22K
1/8W
5per
6
57
IC5:B
TLO-74
+13VP
-13V
+13V
LINE_OUT_BUS
D10
75V PIV
1N914
C23
10
35V
511
1/4W
1per
R30
R153
220
1/8W
5per
C2
10
35V
D2
75V PIV
1N914
C5
10
35V
1
2
3
J1:A
511
1/4W
1per
R3
R152
220
1/8W
5per
R47
1K
1/8W
5per
2
31
IC2:A
OP275GP
100 pF
C24
200V
C41
56 pF
200V
2
31
IC3:A
TLO-72
C25
100 pF
200V
O
IC
SW7:B
TUNER SELECT
R11
47K
1/8W
5per
R8
10K
1/8W
5per
D5
75V PIV
1N914 75V PIV
1N914
D40
-13VP
100 pF
C3
200V
6
57
IC1:B
OP275GP
C1
100 pF
200V
+13VP
2
31
IC4:A
TLO-72
1.5K
1/8W
5per
R49
.22
C34
50V .0047
C30
100V
D43
1N914
75V PIV
10
35V
C76
10
35V
C75
1
2
3
J19
{Value}
100K
1/8W
5per
R18
.047
C14
100V
.0022
C35
100V
10K
1/8W
5per
R36
.047
C28
100V
10K
1/8W
5per
R45
R43
22K
1/8W
5per
R58
22K
1/8W
5per
75V PIV
1N914
D45
R44
22K
1/8W
5per
2.2Vrms
TP9
CW
50K L
P4
HIGH
75V PIV
1N914
D35
EFF_SEND_BUS
CW
P14
50K L
DSP/EFF SEND R50
22K
1/8W
5per
C39
10
35V
R64
22K
1/8W
5per
2.2Vrms
TP10
470K
1/4W
5per
R151
R149
22K
1/8W
5per
D39
1N914
75V PIV
1.5K
1/4W
5per
R148
10K
1/8W
5per
R28
LINE_OUT_BUS
EFF_SEND_BUS
CW
P5:B
100K RA
MID SWEEP
9
10 8
IC5:C
TLO-74
MAIN_BUS
C20
56 pF
200V
D36
1N914
75V PIV
C40
10
35V
SHIELD
T
R
RS
TS
SS
S
J2:B
C6
10
35V
2.2Vrms
TP1
10K
1/8W
5per
R51
D7
75V PIV
1N914
2
31
IC1:A
OP275GP
CW
P12
GAIN
50K L
4.4Vrms
TP4
75V PIV
1N914
D8 R38
10K
1/8W
1per
C4
220 pF
100V
R134
220
1/8W
5per
75V PIV
1N914
D3
6
57
IC2:B
OP275GP
R13
1K
1/8W
5per
R5
10K
1/8W
1per
4.4Vrms
TP2
R35
2.7K
1/8W
5per
2.2Vrms
TP8
R16
22K
1/8W
5per
.15
C12
50V
R57
10K
1/8W
5per
2
31
IC5:A
TLO-74
4.7K
1/8W
5per
R56
C38
100 pF
200V
CW
P9:A
100K RA
MID SWEEP
CW
P9:B
100K RA
MID SWEEP
.047
C73
100V
R109
22K
1/8W
5per
R110
1M
1/8W
5per
D37
RED
Q7
MPS-A13
R63
22K
1/8W
5per
R26
10K
1/8W
5per
CW
P5:A
100K RA
MID SWEEP
R25
22K
1/8W
5per
22K
1/8W
5per
R34
22K
1/8W
5per
R48
2.2Vrms
TP7
1
2
3
J2:A
SHIELD
T
R
RS
TS
SS
S
J1:B
CW
P8
50K L
EFF SEND
6
57
IC3:B
TLO-72
2.2Vrms
TP3
TEST POINT C0NDITIONS:
GAIN, DSP/EFF SEND, CD LEVEL & LEVEL @ "10".
ALL OTHER CONTROLS @ "5" EXCEPT DSP LEVEL @ "0".
1KHZ SINEWAVE INPUT.
