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:

Sheet

Class 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

1

-

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

of

Drawing Title:

Drawing Number:

NONE

2

Ecr(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

-

F

BA115a

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:

Sheet

Class 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

1

-

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

of

Drawing Title:

Drawing Number:

NONE

2

Ecr(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

-

F

BA115a

07S103-XX

2

SCHEMATIC -BASS AMP

Date

4

3

FC1

J6

J12 BLU/WHT

J13 BLK

J16 BLUE

J11 BROWN

J7 WHT

AC
LINE

AC
NEUTRAL

C1

.0033

J8

J13

J11

J12

J14

J15

J10

J18

F1

FC2

J17

2.2K

R51

4.7K

R40

.033 uF

C23

50V

22K

R46

C3

.0033

J16

J22

J19

AC
LINE

J9

J7

J20

J13 BLK

J14 WHT

J12 BLUE

J17 BLU/WHT

J15 BROWN

AC
NEUTRAL

J7 VIOLET

J11 GRAY

J9 VIOLET

J17 GRAY

T/S

J2

J1

T/S

100K

R65

22K

R62

C42
56 pF

200V

C37

.047 uF

100V

C34

50V

2.2 uF

2.2K

R64

-16V

220K

R60

D10
1N914

D13
1N914

10K

R67

TLO-72

U5:B

C41

100 PF

200V

+16V

TLO-72

U5:A

.001uF

C32

100V

47K

R58

4.7K

R63

C36

50V

1 uF

22K

R57

C33

.047 uF

100V

C30

.0047 uF

100V

22K

R52

47K

R56

CW

P1

50K RA

22K

R48

50V

.22 uF

C26

C35
.047 uF

100V

47K

R45

C25

.22 uF

50V

22K

R36

47K

R53

47K

R47

C27

.22 uF

50V

22K

R54

47K

R55

RefDes

Power Table

8

4

+16V

-16V

IC1

100K

R29

U4:A

TLO-72

8

4

8

4

8

4

8

4

1K

R32

50V

2.2 uF

C45

IC2

U3

U4

U5

5

3

CCW

CMN

CW

4

S1

SWITCH

PAGE_NEXT

J11 GRAY

J7 VIOLET

AC
NEUTRAL

100V

C19
.1 uF

270 5W

R66

100V

C38
.1 uF

J14 WHT

J15 BROWN

J12 BLUE

-40V

50V

4700 uF

C6

J17 BLK

J13 BLU/WHT

AC
LINE

50V

4700 uF

C14

C22

.033 uF

50V

BR1

3A

DIODE
BRIDGE

47K

R27

22K

R30

TLO-72

U4:B

C28

.22 uF

50V

100K

R39

C29

.015 uF

50V

.22 uF

C24

50V

+40V

270 5W

R68

22K

R38

22K

R37

R1

2.2K 1/2W

D1

RED

35V

100 uF

C39

35V

100 uF

C40

D11

16V

1N5353B

D12

16V

1N5353B

100V

C21
.047 uF

100V

C43
.047 uF

REM

REM

-16V

100V

C18
.047 uF

+16V

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:

Sheet

Class 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

of

Drawing Title:

Drawing Number:

NONE

2

Ecr(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

-

F

BA115a

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:

Sheet

Class 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

of

Drawing Title:

Drawing Number:

NONE

2

Ecr(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

-

F

BA115a

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

100K

R12

L

R

J3

22 uF

C5

50V

22K

R16

22K

R15

C4

22 uF

50V

270

R3

270

R2

R10

22K

22K

R17

P4

50K LIN

P5

50K LIN

2

3

1

U1:A

TLO-72

6

5

7

TLO-72

U1: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 1/2W

R7

R14

100K

10uF

C9

35V

D3

1N914

1N914

D5

+40V

-40V

VTL-5C7

R8

1K

D2

1N914

R23

47K

R25

10K

33 pF

C12

200V

NE5532

U3:A

C11

10uF

35V

S

D

G

Q6

J112

1N914

D4

R4

1K

R59

1M

50V

1 uF

C44

R6

3.3K 1/2W

R22

1K

-16V

820 1W

R5

33K

R19

33 pF

C10

200V

C17

.1 uF

100V

R28

3.3 1W

+40V

47

R33

D7

1N4744

ZENER

Q4

MJE-340

+16V

R34

220

1K

R50

10uF

C31

35V

R41

220

D6
1N4744

ZENER

Q2

ASSY P/N 07-103-02

C2
.047 uF

100V

1

3

2

XLR M H

J5

R26

47

330 pF

C13

100V

U3:B

NE5532

R9

220

SLVE_SW

SLEEVE

TIP_SW

RING

RING_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

1

2

J21

.1 3W

R61

-40V

D9

1N4744

ZENER

Q5

IRFP-140R