Ampeg BA115 Schematic
DCBA
R45
47K
C29
.015 uF
50V
R39
100K
C35
.047 uF
100V
R27
47K
DCBA
C27
U4:B
R48
22K
TLO-72
C25
.22 uF
50V
R54
22K
C26
.22 uF
50V
C28
.22 uF
50V
R30
22K
.22 uF
50V
C24
.22 uF
50V
R47
47K
R36
22K
R53
47K
R38
22K
Power Table
RefDes
IC1
IC2
U3
U4
U5
CW
5
CMN
4
SWITCH
S1
3
CCW
R29
100K
R37
22K
U4:A
TLO-72
50V
2.2 uF
C45
R55
47K
C32
R46
22K
C30
.0047 uF
100V
.001uF
100V
C23
.033 uF
50V
R56
47K
R52
22K
C22
.033 uF
50V
+16V
D10
1
1
J1
T/S
J2
T/S
2
2
R62
22K
R65
100K
C37
.047 uF
100V
C42
56 pF
200V
F1
FC1
1N914
R60
D13
1N914
-16V
FC2
220K
J14
J15
U5:A
TLO-72
U5:B
TLO-72
R67
10K
C41
100 PF
200V
R64
2.2K
J13
J12
J11
C34
2.2 uF
50V
CW
R63
4.7K
C36
1 uF
50V
P1
50K RA
R51
2.2K
R57
22K
.047 uF
R40
4.7K
R58
47K
C33
100V
FE
FE
+16V-16V
84
84
84
84
84
R32
PAGE_NEXT
1K
1
1
2
2
J6
3
3
CAUTION:
CAUTION:
THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL.
THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL.
TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED
TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND
SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND
THAT EXPLAINED IN THE OPERATING INSTRUCTIO NS.
THAT EXPLAINED IN THE OPERATING INSTRUCTIO NS.
4
4
NOTES:
NOTES:
1) CAUTION: SHOCK HAZ A RD!!
1) CAUTION: SHOCK HAZ A RD!!
THIS UNIT CONTAINS HA ZARDOUS VOLTAGE. DI S CONNECT POWER
THIS UNIT CONTAINS HA ZARDOUS VOLTAGE. DI S CONNECT POWER
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
TOUCHING INTERNAL PARTS.
TOUCHING INTERNAL PARTS.
2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL.
2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL.
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE
AND 10 MEGOHM DIGITA L V OLTMETER.
AND 10 MEGOHM DIGITA L V OLTMETER.
J10
AC
LINE
AC
NEUTRAL
J18
J8
J13 BLK
J12 BLU/WHT
J16 BLUE
J7 WHT
J11 BROWN
J17 GRAY
J9 VIOLET
C1
.0033
.0033
D1
C39
100 uF
35V
C40
100 uF
35V
-
-
C
C
2
2
R1
2.2K 1/2W
RED
C21
C43
.047 uF
100V
N00062
N00062
R990512-01
R990512-01
ECR00047
ECR00047
Ecr(s)/Ecn(s)
Ecr(s)/Ecn(s)
First Used On:
First Used On:
Drawing Title:
Drawing Title:
Drawing Number:
Drawing Number:
REM
REM
Chgd By Appvd by
Chgd By Appvd by
11880 Borman Drive, St. Louis, MO 63146
11880 Borman Drive, St. Louis, MO 63146
SCHEMATIC -BASS AMP
SCHEMATIC -BASS AMP
.047 uF
100V
C18
.047 uF
100V
-
-
07S103-XX
07S103-XX
F
F
+16V
-16V
Date
Date
BA115a
BA115a
3
3
4
4
J16
J17
C3
J7
J9
AC
LINE
AC
NEUTRAL
J19
J22
J20
J13 BLK
J17 BLU/WHT
J12 BLUE
J14 WHT
J15 BROWN
J11 GRAY
J7 VIOLET
-40V
BR1
AC
LINE
AC
NEUTRAL
3A
DIODE
BRIDGE
4700 uF
4700 uF
J17 BLK
J13 BLU/WHT
J12 BLUE
J14 WHT
J15 BROWN
J11 GRAY
J7 VIOLET
DCBA
DCBA
50V
C14
50V
+40V
C6
C19
.1 uF
100V
C38
.1 uF
100V
R68
270 5W
R66
270 5W
SWAPPED J21 PINS 1 & 2, COONECTED J21
SWAPPED J21 PINS 1 & 2, COONECTED J21
7/28/99
7/28/99
1
1
0
0
0
0
REV Date DESCRIPTION
REV Date DESCRIPTION
Drawn:
Drawn:
Checked:
Checked:
Released:
Released:
TO HEADPH GS TO DETACH FROM MAIN GND
TO HEADPH GS TO DETACH FROM MAIN GND
CONTROL ISSUE
CONTROL ISSUE
7/01/99
7/01/99
CONTROL ISSUE
CONTROL ISSUE
7/01/99
7/01/99
Signatures:
Signatures:
Tolerance:
Tolerance:
D11
1N5353B
16V
D12
1N5353B
16V
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
OK
OK
Drawing Size:
Drawing Size:
Drawing Type: Schematic
Drawing Type: Schematic
Class Code:
Class Code:
Sheet
Sheet
1
1
E
E
ST. LOUIS MUSIC, INC
ST. LOUIS MUSIC, INC
Date:
Date:
1/14/99
1/14/99
-
-
NONE
NONE
of
of
DCBA
DCBA
FE
FE
+40V -40V
R10
22K
2
3
TLO-72
D2
1N914
R25
10K
U1:A
1N914
1
D3
R16
22K
Q6
J112
C12
33 pF
200V
R8
1K
1
1
PAGE_NEXT
U2:A
R24
47K
R21
22K
C8
56 pF
200V
R18
1K
P3
CW
50K LIN
CW
50K LIN
2
2
3
3
P5
50K LIN
C16
.0022 uF
100V
P4
C15
.022 uF
50V
TLO-72
C9
10uF
35V
20K RA
CCW
R
L
P2
CW
R14
100K
J3
R12
100K
R13
100K
R20
100K
U2:B
TLO-72
R7
3.3K 1/2W
C11
10uF
R17
22K
35V
S
R23
47K
U3:A
NE5532
G
6
5
VTL-5C7
D
22 uF
R15
22K
TLO-72
C4
50V
U1:B
D5
1N914
7
1N914
D4
R22
1K
C5
22 uF
C44
50V
R4
1K
R6
3.3K 1/2W
-16V
R59
50V
1M
1 uF
R3
270
C10
33 pF
200V
R19
33K
U3:B
R26
47
J5
2
1
3
XLR M H
R2
270
NE5532
C13
330 pF
100V
C2
.047 uF
100V
820 1W
R5
R9
220
C17
.1 uF
100V
3.3 1W
RING
RING_SW
TIP_SW
TIP
SLVE_SW
SLEEVE
R28
J4
T/R/S
SEE NOTE.
R43
1K
R42
1K
-16V
J21
1
2
4.7K
R44
C31
10uF
35V
AP1
500
50V
C20
1 uF
R50
1K
CW
+16V
Q3
MPS-A06
R31
+40V
D7
-40V
R33
Q4
MJE-340
R41
220
R35
220
Q1
MJE-350
47
R49
47
1N4744
ZENER
D8
1N4744
ZENER
R61
.1 3W
D6
1N4744
ZENER
D9
1N4744
ZENER
Q2
Q5
IRFP-140R
1
1
2
2
3
3
R34
220
220
NOTE: R11 & C7 DESIGNATORS ARE NOT USED.
NOTE: BIAS SETTING AS FOLLOWS;
SET AP1 BIAS ADJUST CONTROL
FOR 5mV ACROSS R61 WITH
NO SIGNAL APPLIED, NO LOAD.
CAUTION:
CAUTION:
THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL.
THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL.
TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED
TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND
SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND
THAT EXPLAINED IN THE OPERATING INSTRUCTIO NS.
THAT EXPLAINED IN THE OPERATING INSTRUCTIO NS.
4
4
NOTES:
NOTES:
1) CAUTION: SHOCK HAZ A RD!!
1) CAUTION: SHOCK HAZ A RD!!
THIS UNIT CONTAINS HA ZARDOUS VOLTAGE. DI S CONNECT POWER
THIS UNIT CONTAINS HA ZARDOUS VOLTAGE. DI S CONNECT POWER
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
TOUCHING INTERNAL PARTS.
TOUCHING INTERNAL PARTS.
2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL.
2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL.
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE
AND 10 MEGOHM DIGITA L V OLTMETER.
AND 10 MEGOHM DIGITA L V OLTMETER.
ASSY P/N 07-103-02
SWAPPED J21 PINS 1 & 2, COONECTED J21
SWAPPED J21 PINS 1 & 2, COONECTED J21
7/28/99
7/28/99
1
1
0
0
0
0
REV Date DESCRIPTION
REV Date DESCRIPTION
Checked:
Checked:
Released:
Released:
DCBA
DCBA
TO HEADPH GS TO DETAC H FROM MAIN GND
TO HEADPH GS TO DETAC H FROM MAIN GND
CONTROL ISSUE
CONTROL ISSUE
7/01/99
7/01/99
CONTROL ISSUE
CONTROL ISSUE
7/01/99
7/01/99
Signatures:
Signatures:
Drawn:
Drawn:
Tolerance:
Tolerance:
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
OK
OK
-
-
Drawing Size:
Drawing Size:
Drawing Type: Schematic
Drawing Type: Schematic
Class Code:
Class Code:
2
2
of
Sheet
Sheet
E
E
of
Ecr(s)/Ecn(s)
Ecr(s)/Ecn(s)
ST. LOUIS MUSIC, INC
ST. LOUIS MUSIC, INC
Date:
Date:
1/14/99
1/14/99
First Used On:
First Used On:
-
-
Drawing Title:
Drawing Title:
C
C
Drawing Number:
Drawing Number:
NONE
NONE
2
2
N00062
N00062
R990512-01
R990512-01
ECR00047
ECR00047
11880 Borman Drive, St. Louis, M O 63146
11880 Borman Drive, St. Louis, M O 63146
SCHEMATIC -BASS AMP
SCHEMATIC -BASS AMP
-40V
-
-
Chgd By Appvd by
Chgd By Appvd by
07S103-XX
07S103-XX
F
F
Date
Date
BA115a
BA115a
4
4
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