Page 1
DCBA
FE
J2
-15dB INPUT
15mV
1
J1
0dB INPUT
2
J4
1
2
3
4
5
R1
22K
1/4W
5per
+14V (NORMAL)
-0.6V (FAULT)
D5
1N914
75V PIV
R4
3.3M
1/4W
5per
100K
R18
220K
1/4W
5per
1/4W
5per
R3
C1
400V
235V
V1:B
9-PIN
C2
22
35V
D4
1N914
75V PIV
R6
4.7K
1/4W
5per
R7
10
100K
1/2W
1per
0.9V
C3
6
.1
400V
7
5
9
8
R8
1.5K
1/4W
5per
R24
470K
1/4W
5per
R5
100K
1/4W
5per
3
J5
1
2
J6
1
2
CAUTION:
THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL.
TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND
THAT EXPLAINED IN THE OPERATING INSTRUCTIONS.
4
NOTES:
1) CAUTION: SHOCK HAZARD!!
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
TOUCHING INTERNAL PARTS.
2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL.
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE
AND 10 MEGOHM DIGITAL VOLTMETER.
1N4002TR
100V PIV
D7
1N4002TR
100V PIV
D6
1N4002TR
R11
100K
1/4W
5per
2
IC1:A
3
NE5532
R34
1M
1/4W
5per
D8
100V PIV
D9
1N4002TR
100V PIV
C4
56 pF
200V
C14
2.2
50V
R35
100K
1/4W
5per
C7
470 pF
200V
R21
220K
1/4W
5per
7O8C9
O
R20
330K
1/4W
5per
C8
.0047
100V
R19
220K
1/4W
5per
1
D3
1N914
75V PIV
R9
100K
1/4W
5per
I
12I11C10
R23
3.3M
1/4W
5per
R22
3.3M
1/4W
5per
GAIN
SW1:B
ULTRA LOW
CW
C9
P1
1M A
.1
100V
R26
1M
1/4W
5per
240V
9-PIN
V1:A
R27
100K
1/2W
1per
1
2
3
R28
1.5K
1/4W
5per
R29
1.5K
1/4W
5per
C11
.1
400V
4
9
C10
.033
50V
R31
100K
1/4W
5per
C25
.047
100V
R38
100
1/2W
5per
+14V (OPERATE)
-14V (STANDBY)
R10
1M
1/4W
5per
5
7
IC1:B
6
NE5532
1/2W
R2
470
1/4W
5per
D1
GREEN
BICOLOR
RED
D2
R25
560
1N914
75V PIV
5per
1TO2TC3
TO
R39
470K
1/4W
5per
7V
TI
6TI5TC4
SW1:A
ULTRA HIGH
BASS
C24
.047
100V
R41
470K
1/4W
5per
CW
R42
470K
1/4W
5per
R48
220K
1/4W
5per
P2
1M A
R37
22K
1/4W
5per
R46
470K
1/4W
5per
C20
.001
100V
C21
.01
100V
C23
470 pF
200V
R30
100K
1/4W
5per
CW
1M A
R32
100K
1/4W
5per
C16
.1
100V
R40
470K
1/4W
5per
C19
.033
100V
3
4
S2
FREQUENCY
CMN
1
CW
P4
TREBLE
C27
.0047
R43
100V
2
240V
V2:B
9-PIN
CCW
6
7 5
8
C22
.1
100V
R44
1.5K
1/4W
5per
R45
2.2K
1/4W
5per
100K
1/2W
1per
9
100V
8V
C5
400V
.1
R12
100K
1/4W
5per
R13
R36
8.2K
C12
1/4W
10
5per
35V
470
1/4W
5per
MASTER
C6
.1
250V
CW
P5
50K L
P3
CW
50K L
MID
R17
470K
1/4W
5per
C13
.68
250V
R47
470K
1/4W
5per
TAPPED
4
3
100mH
2
300mH
1
800mH
CMN
L1
C17
.033
C15
.15
100V
V2:A
9-PIN
2 4
R14
220K
1/4W
5per
1
9
3
R15
4.7K
1/4W
5per
R16
220K
1/2W
5per
250V
100V
C26
.68
R33
1M
1/4W
5per
J3
1
0.4V
2
3
4
5
6
7
8
9
10
11
12
13
14
2
3
ASSY P/N 07-519-12
07S519-12 DRAWING REPLACES 07S519-11
CONTROL ISSUE
8-21-03
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
Signatures:
Drawn:
RLB
ST. LOUIS MUSIC, INC
Date:
5-8-03
Wed Aug 20, 2003
Drawing Size:
C
Drawing Type: Schematic
Class Code:
Sheet
NONE
1
1
of
E
Ecr(s)/Ecn(s)
11880 Borman Drive, St. Louis, MO 63146
First Used On:
Drawing Title:
Drawing Number:
Chgd By Appvd by
PWA - PREAMP
F
Date
4
07S519
C18
4700
25V
R50
220
1/4W
5per
R49
220
1/4W
5per
4) VOLTAGES IN RECTANGLES ARE RMSSIGNAL, VOLTAGES WITH 15mV IN.
OTHER VOLTAGES ARE D.C. IN CONDITIONS STATED.
5) CIRCUIT GROUND LED GROUND CHASSIS GROUND
0
REV Date DESCRIPTION
Checked:
Released:
Plot Date:
Plot Time:
Tolerance:
DCBA
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