Ampeg PWA Preamp 07S519 Schematic

A

B

C

D

E

F

J2

C7

R22

R27

7V

3.3M

470 pF

100K

200V

1/4W

1/2W

5per

C11

C23

R21

240V

1per

220K

CW

V1:A

1

.1

R48

470 pF

1/4W

C9

9-PIN

400V

220K

200V

-15dB INPUT

15mV

5per

P1

1

2

3

GAIN

2

4

1/4W

1

7

8

9

TO

TC

TI

1M A

.1

9

SW1:A

5per

O

C

I

SW1:B

100V

3

TO

TC

TI

ULTRA HIGH

C20

ULTRA LOW

CW

.001

J1

O

C

I

C10

4

5

6

BASS

P2

CW

R1

R3

R6

R20

100V

R30

P4

10

11

12

1M A

TREBLE

22K

100K

4.7K

.033

C21

100K

1M A

330K

1/4W

50V

1/4W

1/4W

1/4W

.01

1/4W

5per

5per

C1

5per

R26

R28

5per

R32

C27

R11

5per

100V

C8

1M

1.5K

100K

.0047

R43

10

R7

100K

1/4W

1/4W

R37

1/4W

100V

V2:A

1/4W

5per

5per

5per

100K

1

0dB INPUT

400V

100K

5per

.0047

R23

22K

1/2W

8V

9-PIN

1/2W

100V

R29

R31

1/4W

1per

2

4

1per

3.3M

5per

240V

R19

C5

1/4W

1.5K

100K

9

0.9V

220K

5per

1/4W

1/4W

C16

C6

R14

3

235V

1/4W

5per

5per

V2:B

6

.1

R12

.1

.1

220K

C3

5per

100V

9-PIN

400V

100K

250V

1/4W

6

7

5

1/4W

5per

100V

J3

.1

C4

9

5per

1

V1:B

0.4V

400V

56 pF

7

8

5

200V

2

R13

CW

C26

R4

9

R40

R44

R36

P5

9-PIN

C12

8.2K

MASTER

3

3.3M

470K

1.5K

1/4W

470

50K L

.68

4

1/4W

8

1/4W

1/4W

10

1/4W

R33

R8

35V

5per

250V

5

5per

C2

5per

5per

5per

R15

1M

1.5K

1/4W

22

R45

4.7K

6

1/4W

5per

35V

2.2K

P3

1/4W

2

5per

C25

7

1/4W

5per

C14

.047

C24

5per

CW

50K L

R16

8

.047

+14V (NORMAL)

100V

MID

TAPPED

9

2.2

100V

C17

220K

-0.6V (FAULT)

R38

4

CMN

1/2W

10

50V

.033

3

100mH

5per

J4

D5

R18

100

11

1

2

100V

1/2W

2

300mH

220K

IC1:A

1

5per

12

2

1N914

3

C19

C22

75V PIV

1/4W

D4

R24

C15

1

800mH

13

3

5per

470K

NE5532

.033

.1

D3

L1

1N914

1/4W

100V

100V

.15

14

4

75V PIV

5per

1N914

C13

75V PIV

+14V (OPERATE)

100V

5

-14V (STANDBY)

.68

250V

R10

R2

3

R17

R47

R34

4

2

1M

CCW

470K

470K

1M

470

CW

S2

1/4W

1/4W

1/4W

1/4W

5per

1/4W

R39

R41

R42

R46

FREQUENCY

5per

5per

5per

R9

5per

D1

BICOLOR

5

R25

D2

470K

470K

470K

470K

7

100K

6

RED

1/4W

1/4W

1/4W

1/4W

IC1:B

5per

5per

5per

5per

CMN

R5

R35

1/4W

560

1N914

GREEN

NE5532

100K

100K

5per

1/2W

75V PIV

5per

1/4W

1/4W

5per

5per

3

J5

ASSY P/N 07-519-12

1

2

D6

D8

1N4002TR

1N4002TR

100V PIV

100V PIV

D7

D9

R50

07S519-12 DRAWING REPLACES 07S519-11

220

1N4002TR

1N4002TR

100V PIV

100V PIV

1/4W

J6

C18

5per

1

4700

25V

R49

2	220
	1/4W
	5per
					0 8-21-03	CONTROL ISSUE
CAUTION:					REV Date	DESCRIPTION		Ecr(s)/Ecn(s) Chgd By Appvd by Date
THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL.						THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED							ST. LOUIS MUSIC, INC
					Signatures:		Date:
SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND
THAT EXPLAINED IN THE OPERATING INSTRUCTIONS.					Drawn:	RLB	5-8-03
4								11880 Borman Drive, St. Louis, MO 63146
NOTES:					Checked:			First Used On:
1) CAUTION: SHOCK HAZARD!!	4)	VOLTAGES IN RECTANGLES ARE RMSSIGNAL, VOLTAGES WITH 15mV IN.			Released:
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER
		OTHER VOLTAGES ARE D.C. IN CONDITIONS STATED.
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE					Plot Date:Wed Aug 20, 2003 Drawing Size:		C	Drawing Title:
	5)	CIRCUIT GROUND	LED GROUND	CHASSIS GROUND
TOUCHING INTERNAL PARTS.						Drawing Type: Schematic			PWA - PREAMP
2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL.					Plot Time:
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.					Tolerance:	Class Code:	NONE	Drawing Number:
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE									07S519
AND 10 MEGOHM DIGITAL VOLTMETER.						Sheet 1 of	1

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2

3

4

A

B

C

D

E

F