Crate GT1200H Schematic

+16V

D1

1N914

1N914

D2

J1

INPUT

C3

.0068
100V

R5

15K

D

1

C8

.047

100V

J14

TP

CONDITION "A" CONDITION "B" CONDITION "C"

1

2

3

4

2

5

.48Vpp

18Vpp

7.2Vpp

5Vpp

9.8Vpp

6

7

8

9 *

9.8Vpp

4.8Vpp

30Vpp

-16V

C9

+40V

.22

.48Vpp .48Vpp

5.2Vpp

6.2Vpp

5.2Vpp

8Vpp

5Vpp 3Vpp

2.5Vpp

3

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.

R4

680K

R6

6.8K

5.2Vpp

.18Vpp

3.6Vpp

1.5Vpp

30Vpp30Vpp

C55

.047
100V

R82

100K

DCBA

DISTORTION CHANNEL

7

7

REVERB

10K A

TP4

Q6

C

R73

P11

C82

100V

6

IC2:B

5

TLO-72

D6

1N914

2N5210

R113

.01

G

1M

TP7

B

6

IC4:B

5

TLO-72

C53

56 pF

200V

R75

47K

CW

R21

47K

R28

47K

J2

R26

22K

1N914

R115

22K

C13

.22

R41

2.2K

R51

1M

R43

22K

R45

4.7K

3

IC3:A

2

TLO-72

C31

50V

R44

1

1.5K

C27

.015

TP5

.1

C30

HIGH

LOW

MID

CW

P5

10K L

CW

P4

10K A

CW

P13

500 A

.0047

100V

R38

D10

R30

10K

C20

1

1K

C25

.47

C23

1

1N914

Q8

2N5210

D9

R34

47K

JOW2

TP8

1

2.2K

R78

22K

DS

Q24

J175

G

R58

10K

D

CHG'D C36 FROM .1 TO .01UF

INITIAL ISSUE

THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO

R99

C42

2.2

REM

R

D20

1N914

R68

1M

Date:

-

T

+40V

+40V

+16V

+16V

Ecr(s)/Ecn(s)

ST. LOUIS MUSIC, INC

7/16/02

First Used On:

C68

.22

R56

2.2M

D15

1N914

R00987

11880 Borman Drive, St. Louis, MO 63146

R116

22K

R77

47K0

2

3

IC4:A

TLO-72

R89

0

R91

22K

4/18/03

B

8/08/02

A

REV Date DESCRIPTION

Signatures:

Drawn:

Checked:

Released:

Plot Date:
Plot Time:

Tolerance:

Thu Apr 17, 2003

Drawing Size:

Drawing Type: Schematic

Class Code:

Sheet

1

NONE

of

C

2

Drawing Title:

Drawing Number:

TP2

TP1

3

2

IC1:A

1

TLO-72

R7

22K

C1

.47

5

6

IC1:B

C2

.0033
100V

7

TLO-72

C7

R2

22K

R3

22K

R80

6.8K

R1

1.5K

C4

.22

C5

C56

.0015

100V

HIGH

.1

CW

P10

10K L

I

R9

680

C10

.015

Q1

D

R8

1M

S

J175

C46

2.2

CW

P8

LOW

10K A

C47

1

CW

P9

500 A

MID

5

7

IC5:B

6

TLO-72

TP9

REV SEND +

R90

10K

REV SEND -

R93

22

CLEAN CHANNEL

5

7

IC3:B

6

TLO-72

R42

150K

C29

56 pF

200V

R46

1K

J6

J9

J7

REV RETURN +

J16

REV RETURN -

E'

J112

D

G

E

Q26

S

R11

2.2K

1

G

JOW3

OVERDRIVE GAIN

C6

35V

R18

1.5K

R12

10K

A

B

C32

2.2

TP6

10

Q4

S

G

D

J112

OVERDRIVE LEVEL

CW

P6

10K A

R47

4.7K

LEVEL

C34

2.2

D26

1N914

D30

1N914

-16V

C54

.22

50V

P1

10K L

D4

1N746ARL

3.3V

R72

CW

+16V

R87

10K

CW

12K

P7

100K RA

2

3

C71

.0033
100V

C52

100V

R76

10K

.047

IC2:A

TLO-72

1N746ARL

3.3V

SOLO LEVEL

R59

47K

R94

10K

3

IC5:A

2

R14

4.7K

D3

470K

56 pF
200V

R88

C58

R10

1

R109

4.7K

Q25

J175

TLO-72

10K

R64

47K

1

S

D

TP3

SOLO GAIN

CW

D

S

Q21

S

D

J112

Q3

C2

G

J175

B

G

R16

4.7K

P2

10K L

P12

10K A

G

C15

S

2.2

Q2

J175

D

R17

4.7K

CW

10K

C2

Q29

J175

D

S

R112

C49

1

A

G

R92

10K

C61

2.2

ASSY P/N 07-199-01 65WATT VERSION

ASSY P/N 07-199-02 120 WATT VERSION

C18

.0056

100V

D

S

J175

R57

15K

C38

10

35V

Chgd By Appvd by

PWA - GUITAR AMP

Q7

G

R52

680K

REM

C19

100V

Q16

J175

FE

C24

R22

4.7K

R29

4.7K

.01

P3

10K L

SHAPE

R106

G

2.2

C17

.22

CW

1M

B2

1

D16

C81

1N914

.01

100V

2_PWRAMP

R48

27K

C33

.001
100V

2

D

S

3

Date

4

GT65/120a

07S199-XX

GT1200H

DCBA

E

F

©2007 LOUD Technologies Inc. All rights re served PWA Guitar Amplifi er PCB Schematics PAGE 1

DCBA

FE

TEST POINT CONDITIONS FOR POWER AMP:

1.1Vpp

1kHz SINE WAVE INPUT INTO INSERT TIP, 4 OHM LOAD

SOLO

TP
10

11
12

13
14

1.8Vpp RIPPLE

1.8Vpp RIPPLE

15

SWITCHING LOGIC

1

OVERDRIVE

CLEAN

2

S1

SOLO/OVERDRIVE

I

I

C C

O O

J21

1

R

2

T

3

C65

4

5

3

6

7

8

9

10

11

1

C75

1

S+
S-

CLEAN/OVERDRIVE

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.

D27

1N914

D24

1N914

R55

33K

-16V

S2

CC

OO

A

-10V

-10V
0V

MPS-A55

I

I

.65Vpp

35Vpp
35Vpp

32Vpp

Q17

C69

.1
100V

C66

.1

100V

R96

270
5W

R95

270
5W

C26

47

TP13

35V

TO SPEAKER

S+

S-

C59

.047
100V

R97

10
1/2W

D29

1N5353B

16V

D28

1N5353B

16V

R00987

Ecr(s)/Ecn(s)

First Used On:

11880 Borman Drive, St. Louis, MO 63146

Drawing Title:

Drawing Number:

J5

+

C14

100
35V

C12

100

35V

J15

-

C28

.047
100V

C16

.047
100V

+16V

-16V

4 Ω

.047
100V

REM

Chgd By Appvd by

GT65/120a

PWA - GUITAR AMP

07S199-XX

F

1

2

C44

3

Date

4

R31

3.3K

1/2W

C22

220 pF
100V

C21

1

2N5088

C39

1

TP12

TP11

+40V

Q11

TIP-142

D12

GI752

200V PIV

R36

220

R61

220

D13

1N914

D21

1N914

Q15

TIP-147

C43

220 pF
100V

-40V

C78

.1

C79

100V

.1

100V

D35

GBPC602

4/18/03

B

8/08/02

A

R39

470

Q9

R60

4702N5087

C77

.1

100V

C76

.1

100V

R37

4.7

R33

.47

5W

R83

.47

5W

-40V

CHG'D C36 FROM .1 TO .01UF

INITIAL ISSUE

TIP-147

REV Date DESCRIPTION

THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO

Signatures:

Drawn:

Checked:

Released:

Plot Date:
Plot Time:

Tolerance:

Thu Apr 17, 2003

Drawing Size:

Drawing Type: Schematic

Class Code:

R69

YEL

Q13

47

R70

22K

R49

680

E

C51

220

0V

-16V

B

DC

.048V

1.4V

-.67V

.048V

34V

-34V

0V OR +10V

D18

GRN

CLEAN

R71

1M

+16V

C

0V

+10V

A

1N914

R74

1.5K

R81

470

D25

1N746ARL

3.3V

C41

.01
100V

D22

+16V

R86

2.2K

D19

1N914

C48

.1

Q22

MPS-A13

10K

R67

+16V

D36

1N914

R98

2.2K

R54

C37

100V

1M

.01

+16V

R103

D37

1N914

33K

B2

B

2_PWRAMP

R53

100K

R15

47K

-16V-16V

R102

33K

C74

.047

100V

-40V

R105

1M

Q27

MPS-A55

2N5087

C36

.01

Q28

MPS-A13

Q14

R66

47

+16V

OVERDRIVE
D7

R19

2.2K

MPS-A13

C73

.01
100V

AC

+10V

+10V

R50

2.2K

D23

1N914

TP10

Q20

2N5087

C35

220 pF

100V

Q19

MJE-340

R62

1/2W

LINE

J25

J24

NEUTRAL

J29

C

R27

2.2K

D8

RED

SOLO

CONNECT APPROPIATE
XFMR LEAD TO J17 FOR
DESIRED LINE VOLTAGE.

+40V

C40

220 pF

100V

R100

330

10

C45

220

R101

100

JOW6

ICL1

3A

+16V

"PARK" THE THREE
UNUSED LEADS ON
ISOLATED TABS

J26, J27, & J28.

R65

27K

C57

10

35V

AP1

500

REPLACE WITH

0.2 OHM, 5W ON

R104

65W VERSIONS

.1

ONLY

5W

J20

J19

GRAY/WHT

WHITE

C11

.001

100V

Q12

MPS-A06

1 3

2

OPT1

OPT2

OPT3

BROWN

BLK

BLUE

J17

J17

J19

R13

1.5K

R40

330

CW

240V

230V

120V

100V

EXPORT WIRING

R63

220

1/2W

CT

R24

1.5K

1/2W

+40V

D14

1N914

Q18

D17

1N914

J23

J13

4

5

J22

J27

J26

J28

J8

J11

+40V

T1

J23

J13

J22

Sheet

DCBA

E

R20

4.7

Q23

+40V

+40V

Q5

TIP-142

GI752

200V PIV

R23

.47

5W

R85

.47

5W

-40V

ON 120W
VERSIONS
ONLY

C67

4700

C70

4700

-40V

REM

-

2

of

D5

TP14

TP15

ST. LOUIS MUSIC, INC

Date:

7/16/02

C

NONE

2

GT1200H

©2007 LOUD Technologies Inc. All rights re served PWA Guitar Amplifi er PCB Schematics PAGE 2