Page 1
D C B A 4 3
2
NOTES:THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL. CAUTION:
TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
TOUCHING INTERNAL PARTS. 1) CAUTION: SHOCK HAZARD!!
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. SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND
THAT EXPLAINED IN THE OPERATING INSTRUCTIONS.
D C B A
1
F E
1
Signatures:
Checked:Drawn:
SheetClass Code:
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO Drawing Size:
Drawing Type: Schematic
Tolerance: Released:REV Date DESCRIPTION
E 0
7/01/99
2- OK
CONTROL ISSUE SWAPPED J21 PINS 1 & 2, COONECTED J21
TO HEADPH GS TO DETACH FROM MAIN GND
1
0
7/28/99
7/01/99
CONTROL ISSUE
ECR00047 R990512-01 N00062
C
ofDrawing Title:
Drawing Number:NONE
2Ecr(s)/Ecn(s)
First Used On: ST. LOUIS MUSIC, INC Date: 1/14/99
-
11880 Borman Drive, St. Louis, MO 63146
Chgd By
Appvd by- FBA115a
07S103-XX
2
SCHEMATIC -BASS AMP
Date
4 3
D C B A 4 3
2
NOTES:THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL. CAUTION:
TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
TOUCHING INTERNAL PARTS. 1) CAUTION: SHOCK HAZARD!!
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. SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND
THAT EXPLAINED IN THE OPERATING INSTRUCTIONS.
D C B A
1
F E
1
Signatures:
Checked:Drawn:
SheetClass Code:
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO Drawing Size:
Drawing Type: Schematic
Tolerance: Released:REV Date DESCRIPTION
E 0
7/01/99
2- OK
CONTROL ISSUE SWAPPED J21 PINS 1 & 2, COONECTED J21
TO HEADPH GS TO DETACH FROM MAIN GND
1
0
7/28/99
7/01/99
CONTROL ISSUE
ECR00047 R990512-01 N00062
C
ofDrawing Title:
Drawing Number:NONE
2Ecr(s)/Ecn(s)
First Used On: ST. LOUIS MUSIC, INC Date: 1/14/99
-
11880 Borman Drive, St. Louis, MO 63146
Chgd By
Appvd by- FBA115a
07S103-XX
2
SCHEMATIC -BASS AMP
Date
4 3
1K R18
22K R21
C15
.022 uF
50V
NOTE: BIAS SETTING AS FOLLOWS;
SET AP1 BIAS ADJUST CONTROL
FOR 5mV ACROSS R61 WITH
NO SIGNAL APPLIED, NO LOAD.
NOTE: R11 & C7 DESIGNATORS ARE NOT USED.
R13
100K
100KR12
L RJ3
22 uFC5
50V
22K R16
22K R15 C4
22 uF
50V
270R3
270R2
R10
22K
22K R17
P4
50K LINP5
50K LIN
23
1 U1:A
TLO-72
65
7
TLO-72U1:B
CW
CW
P3
50K LIN
U2:A
TLO-72
47K R24
C16
.0022 uF
100V
C8
56 pF
200V
PAGE_NEXT
CCW CW
P2
20K RA
R20
100K
TLO-72 U2:B
3.3K 1/2WR7
R14
100K
10uFC9
35V
D3
1N914
1N914D5
+40V
-40V
VTL-5C7
R8
1K
D2
1N914
R23
47K
R25
10K
33 pFC12
200V
NE5532 U3:A
C11
10uF
35V
S
D G
Q6J112
1N914
D4
R4
1K R591M
50V
1 uFC44
R6
3.3K 1/2W
R22
1K
-16V
820 1WR5
33K R19 33 pFC10
200V
C17
.1 uF
100V
R28
3.3 1W
+40V
47 R33
D7
1N4744
ZENER
Q4
MJE-340
+16V
R34
220
1K R50
10uFC31
35V
R41
220
D6
1N4744
ZENER
Q2
ASSY P/N 07-103-02
C2
.047 uF
100V
13 2 XLR M H J5 R26
47
330 pFC13
100V U3:B
NE5532
R9
220
SLVE_SWSLEEVE TIP_SW RINGRING_SW TIP
J4
T/R/S
C20
1 uF
50V
D8
1N4744
ZENER
R49
47
SEE NOTE.
MPS-A06 Q3
R44
4.7K 1K R43
R35
220 Q1
MJE-350
-16V
-40V 220 R31
1K R42
500 AP1
CW
12 J21
.1 3W R61
-40V
D9
1N4744
ZENER
Q5
IRFP-140R
