Page 1
DCBA
+16V
DISTORTION CHANNEL
TP4
7
7
R21
47K
R28
47K
Q6
C
R73
100K
C50
.001
100V
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
R26
22K
1N914
C13
.22
R41
2.2K
R51
1M
R43
22K
R45
4.7K
3
2
IC3:A
1
TLO-72
C31
.1
50V
R44
1.5K
TP5
C27
.015
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
.001
100V
C68
C38
.22
Q31
2N5087
R77
47K
R89
47K
2
3
IC4:A
TLO-72
TP8
1
R99
2.2K
T
R
R78
22K
R56
C60
.0022
100V
D20
R68
1M
+16V
+16V
C42
2.2
1N914
DS
Q24
J175
G
R58
10K
D
47K
D39
1N754ARL
R118
10K
R11
2.2K
1
R12
10K
A
G
C32
2.2
OVERDRIVE GAIN
C6
10
35V
R18
1.5K
Q4
S
G
D
J112
OVERDRIVE LEVEL
CW
P6
10K A
R47
4.7K
TP6
LEVEL
C34
2.2
P1
10K L
D4
1N746ARL
3.3V
R72
12K
100K RA
CW
P7
CW
.0033
100V
2
IC2:A
3
C71
1N746ARL
C52
.047
100V
R76
10K
R14
4.7K
TLO-72
D3
3.3V
SOLO LEVEL
R59
47K
1
R109
4.7K
Q25
J175
R10
10K
R64
47K
S
D
S
D
B
TP3
SOLO GAIN
CW
D
G
S
Q21
G
J112
J175
G
P2
10K L
P12
10K A
Q3
G
R16
4.7K
C2
C15
S
2.2
Q2
J175
D
R17
4.7K
CW
C2
R112
10K
Q29
J175
D
S
C49
1
A
D1
J1
INPUT
C3
.0068
100V
R5
15K
D
1
C8
.047
100V
.22
1N914
D2
1N914
-16V
C9
+40V
R4
680K
R6
6.8K
C1
.47
3
2
IC1:A
TP1
1
TLO-72
R7
22K
GND-CH
TP
CONDITION "A" CONDITION "B" CONDITION "C"
C56
.0015
100V
HIGH
LOW
MID
C5
.1
CW
P10
10K L
CW
P8
10K A
CW
P9
500 A
1
2
3
4
2
5
6
7
8
9 *
.48Vpp
18Vpp
7.2Vpp
5Vpp
9.8Vpp
3.3Vpp
9.8Vpp
4.8Vpp
30Vpp
.48Vpp .48Vpp
5.2Vpp
6.2Vpp
5.2Vpp
.18Vpp
5.2Vpp
8Vpp
3.2Vpp 3.6Vpp
5Vpp 3Vpp
2.5Vpp
1.5Vpp
30Vpp30Vpp
I B
R80
6.8K
C46
2.2
C47
1
R1
1.5K
.22
TP2
5
7
6
IC1:B
C2
.0033
100V
TLO-72
C7
R2
22K
R3
22K
R9
680
C4
C10
.015
Q1
D
R8
1M
S
J175
CLEAN CHANNEL
5
7
IC3:B
6
TLO-72
R42
150K
C29
56 pF
200V
R46
1K
R57
15K
C18
.0056
100V
D
S
J175
FE
C24
1M
CW
D16
R48
27K
2.2
C17
.22
B2
2_PWRAMP
C33
.001
100V
1
2
R22
4.7K
R29
4.7K
C19
.01
P3
100V
10K L
SHAPE
Q16
J175
10K
G
C81
100V
R106
1N914
.01
D
S
Q7
G
R52
5
R82
REPLACE WITH
0
JUMPERS ON
DSP VERSIONS
6
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: SHO CK HA ZARD!!
THIS UNIT CONT A INS HAZARDOUS VOLTA GE. DISCONNECT POWER
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
TOUCHING INTE RNA L P A RTS.
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 VOLTMETE R.
IC5:B
TLO-72
R90
0
J2
R84
100K
7
R115
47K
R116
47K
R91
22K
3
JOW1
R94
47K
R92
10K
J10
E'
J112
D
G
E
Q26
S
3
IC5:A
2
TLO-72
R88
REPLACE WITH
JUMPER ON
DSP VERSIONS
0
1
J11
J8
D34
1N4002TR
100V PIV
D33
1N4002TR
100V PIV
D32
1N4002TR
100V PIV
D31
1N4002TR
100V PIV
C64
1000
16V
R107
1/2W
C63
.1
100V
10
1
2
3
4
5
I
6
6/26/03
1
11/27/02
0
REV Date DESCRIPTION
Drawn:
Checked:
Released:
Plot Date:
Plot Time:
Tolerance:
CHG'D C36 FROM .1 TO .O1 UF .
CONTROL ISSUE
Signatures:
Thu Jun 26, 2003
N01177
Ecr(s)/Ecn(s)
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
ST. LOUIS MUSIC, INC
REM
Chgd By Appvd by
Date:
of
8/30/02
C
NONE
2
First Used On:
11880 Borman Drive, St. Louis, MO 63146
Drawing Title:
PWA - DSP GUITAR AMP
Drawing Number:
REM
Drawing Size:
Drawing Type: Schematic
Class Code:
Sheet
1
Date
4
GTX212d
07S195-XX
GTX212
DCBA
E
F
©2007 LOUD Technologies Inc. All rights re served PWA DSP Guitar Amplifi er PCB Schematics PAGE 1
Page 2
DCBA
FE
TEST POINT CONDITIONS FOR POWER AMP:
1.1Vpp
1
SOLO
OVERDRIVE
CLEAN
+16V
R117
D'
4.7K
R79
1K
Q17
MPS-A55
I
I
R50
2.2K
B'
E'
-16V
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: SHO CK HA ZARD!!
THIS UNIT CONT A INS HAZARDOUS VOLTA GE. DISCONNECT POWER
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
TOUCHING INTE RNA L P A RTS.
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
1kHz SINE WAVE INPUT INTO INSERT TIP, 4 OHM LOAD
D19
.1
R67
10K
DC
.048V
1.4V
-.67V
.048V
34V
-34V
0V OR +10V+10V
+16V
D36
1N914
+16V
R98
2.2K
+10V0V
100V
CB
0V
R54
1M
C37
.01
+16V
R32
4.7K
1K
R108
R25
10K
R103
D37
1N914
B2
B
33K
4
3
2
1
D18
GRN
CLEAN
R71
1M
+16V
J4
R74
1.5K
ACTP
.65Vpp
10
11
35Vpp
35Vpp
12
32Vpp
13
1.8Vpp RIPPLE
14
1.8Vpp RIPPLE
15
SWITCHING LOGIC
A
-10V
-10V
0V
+16V
R86
2.2K
A
C41
.01
100V
D22
1N914
R81
470
D25
1N746ARL
3.3V
MPS-A13
+10V
1N914
C48
Q22
2_PWRAMP
Q10
S
D
J112
B'
R110
3.3K
R53
100K
R102
33K
C74
.047
100V
G
R15
47K
-16V-16V
-40V
D'
A
R105
1M
Q27
MPS-A55
Q14
2N5087
C36
.01
Q28
MPS-A13
R66
47
+16V
C51
220
OVERDRIVE
D7
YEL
R19
2.2K
Q13
MPS-A13
E
C73
.01
100V
R69
47
R70
22K
R49
680
NEUTRAL
C
D23
1N914
+40V
TP10
Q20
2N5087
C35
220 pF
100V
R62
1/2W
R100
10
C45
220
Q19
MJE-340
LINE
J25
J24
J29
FOR DSP
VERSIONS
SEE BOM
R27
2.2K
D8
RED
SOLO
+16V
CONNECT APPROPIATE
XFMR LEAD TO J17 FOR
DESIRED LINE VOLTAGE.
"PARK" THE THREE
UNUSED LEADS ON
ISOLATED TABS
J26, J27, & J28.
330
R101
100
JOW6
ICL1
3A
C40
220 pF
100V
+40V
R65
27K
C57
10
35V
.001
Q12
MPS-A06
AP1
500
REPLACE WITH
0.2 OHM, 5W ON
R104
60W VERSIONS
.1
ONLY
5W
J20
J19
OPT1
OPT2
OPT3
BROWN
GRAY/WHT
BLK
BLUE
WHITE
C11
100V
T1
1 3
2
R63
1/2W
CT
J17
J17
J19
CW
240V
230V
120V
100V
R13
1.5K
R40
330
EXPORT WIRING
C69
.1
100V
C66
.1
100V
R96
220
5W
R95
220
5W
C26
47
TP13
35V
TO SPEAKER
S+
S-
C59
.047
100V
R97
10
1/2W
D29
1N5353B
16V
D28
1N5353B
16V
C14
100
35V
C12
100
35V
J15
J5
+
-
4 W
1
2
+16V
-16V
C44
.047
100V
C28
.047
100V
C16
.047
100V
3
TP11
+40V
Q5
R20
4.7
TIP-147
Q23
TIP-142
MR-752
200V PIV
R23
.47
5W
R85
.47
5W
-40V
ON 120W
VERSIONS
ONLY
+40V
C67
4700
C70
4700
-40V
D5
TP14
TP15
200V PIV
220
-40V
.1
100V
D12
MR-752
D13
1N914
D21
1N914
TIP-147
D35
+40V
Q15
C43
220 pF
100V
C79
.1
100V
GBPC602
Q11
TIP-142
R33
R83
-40V
R37
4.7
.47
5W
.47
5W
+40V
R31
3.3K
1/2W
C22
220 pF
100V
C21
1
2N5088
C39
1
R36
R39
470
Q9
R60
4702N5087
R61
220
R24
1.5K
1/2W
D14
1N914
Q18
D17
220
1N914
TP12
C78
J23
J13
4
5
J22
J27
J26
J28
C77
100V
100V
.1
C76
.1
06a195-01/02 120 WATT/ 65 WATT
CHG'D C36 FROM .1 TO .O1 UF .
CONTROL ISSUE
Signatures:
Thu Jun 26, 2003
N01177
Ecr(s)/Ecn(s)
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
ST. LOUIS MUSIC, INC
REM
Chgd By Appvd by
Date:
of
8/30/02
C
NONE
2
First Used On:
11880 Borman Drive, St. Louis, MO 63146
Drawing Title:
PWA - DSP GUITAR AMP
Drawing Number:
REM
{Checked By}
Drawing Size:
Drawing Type: Schematic
Class Code:
Sheet
2
Date
4
GTX212d
07S195-XX
J13
J22
J23
6/26/03
1
11/27/02
0
REV Date DESCRIPTION
Drawn:
Checked:
Released:
Plot Date:
Plot Time:
Tolerance:
GTX212
DCBA
E
F
©2007 LOUD Technologies Inc. All rights re served PWA DSP Guitar Amplifi er PCB Schematics PAGE 2
Page 3
+16V
D1
J1
INPUT
TIP_SW
SLVE_SW
1
1
2
2
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 INSTRUCTIONS.
THAT EXPLAINED IN THE OPERATING INSTRUCTIONS.
4
4
NOTES:
NOTES:
1) CAUTION: SHOCK HAZARD!!
1) CAUTION: SHOCK HAZARD!!
2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL.
2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL.
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE
SLEEVE
CONDITION "A" : CHANNEL A, GAIN ONE SELECTED,
1
GAIN 1 @ 10, LOW & HIGH @ 5, LEVEL @ 10,
1kHz 40mV SINE WAVE INPUT
2
CONDITION "B" : CHANNEL A, GAIN TWO SELECTED
GAIN 2 @ 10, LOW & HIGH @ 5, LEVEL @ 10,
1kHz 40mV SINE WAVE INPUT
3
CONDITION "C" : CHANNEL B, LEVEL @10,
LOW, MID, HIGH @ 5
1kHz 130mV SINE WAVE INPUT
CONDITION "A" CONDITION "C" CONDITION "B"
TP
1
2
3
4
5
6
7
8
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
TOUCHING INTERNAL PARTS.
TOUCHING INTERNAL PARTS.
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.
AND 10 MEGOHM DIGITAL VOLTMETER.
AND 10 MEGOHM DIGITAL VOLTMETER.
C3
TIP
.0068
100V
C8
.047
100V
TEST POINT CONDITIONS
.48Vpp
5.2Vpp
6.4Vpp
5Vpp
12Vpp
2.8Vpp
6Vpp
6Vpp
RefDes
IC1
IC2
IC3
IC4
IC5
R5
15K
D
C9
.22
Power Table
Part Number
37-072-01
37-072-01
37-072-01
37-072-01
37-072-01
1N914
D2
1N914
-16V
+40V
TO TUNER
DOMESTIC VERSION
ONLY -01, -03, -06, -07
DNP FOR -04, -05
.48Vpp 1.5Vpp
16Vpp 5.4Vpp
7Vpp
5Vpp
14Vpp
2.8Vpp
8Vpp 6Vpp
8Vpp
J18
-16V+16V
8
4
8
4
8
4
8
4
8
4
3
2
1
R4
680K
.55Vpp
9Vpp
6Vpp
R6
6.8K
R111
220
C62
100
35V
C1
.47
+16V
R80
6.8K
DCBA
DCBA
FE
FE
OVERDRIVE CHANNEL
G
10K A
G
2.2
P6
Q26
J112
J112
R47
4.7K
1N746ARL
S
D
CW
P7
LEVEL
100K RA
D
S
GAIN 1
P1
10K L
D4
3.3V
Q4
CW
R14
4.7K
IC2:A
2
1
3
TLO-72
D3
1N746ARL
3.3V
R72
C52
22K
.047
100V
R76
10K
R59
47K
CW
IC5:A
3
2
S
Q3
D
R10
10K
TP3
P2
GAIN 2
R79 = 12K OHM 1/4W VERSIONS -04, -05
R79
4.7K
R64
47K
1
TLO-72
R88
0
J11
J8
B
G
J175
G
R16
4.7K
10K L
Q25
Q21
LEVEL
1N4002TR
100V PIV
1N4002TR
100V PIV
J175
CW
S
D
D34
D33
C
S
Q2
D
R17
4.7K
D
G
S
J175
G
J112
P11
CW
10K L
C15
2.2
C49
1
JOW1
R92
6.8K
D32
1N4002TR
100V PIV
1N4002TR
100V PIV
B
A
D31
C53
56 pF
200V
R75
47K
6
5
TLO-72
6
5
C64
1000
16V
TP7
IC2:B
D6
1N914
IC4:B
TLO-72
TP16
Q6
R84
100K
7
7
C63
100V
2N5210
.1
R28
47K
TP4
R73
100K
1
2
3
4
R107
10
1/2W
C50
.001
100V
R21
47K
J10
R26
22K
Q8
2N5210
R77
47K
R91
22K
PROC. SIGNAL
UNPROC. SIGNAL
+V FOR DSP BOARD
C30
.0047
R38
1K
D10
1N914
D9
R30
1N914
10K
R34
R89
47K
C60
.0022
100V
J175
47K
C20
1
IC4:A
2
1
3
TLO-72
R78
22K
Q24
S
D
G
R58
10K
D
3
04/17/03
Date DESCRIPTION Ecr(s)/Ecn(s) Chgd By Appvd by Date
REV
3/7/02
3/7/02
2
2
10/24/01
10/24/01
1
1
3/12/01
3/12/01
0
0
REV Date DESCRIPTION
REV Date DESCRIPTION
Signatures:
Signatures:
Drawn:
Drawn:
Checked:
Checked:
Released:
Released:
Plot Date:
Plot Date:
Thu Apr 17, 2003
Thu Apr 17, 2003
Plot Time:
Plot Time:
Tolerance:
Tolerance:
P5
100V
HIGH
10K L
C25
.47
P4
LOW
10K A
C23
1
R35
330
R99
2.2K
TP8
TP9
ADDED -06, -07 CONFIG
ADDED -04, -05 ASSY
ADDED -04, -05 ASSY
PWB FROM -01 TO -02. ADDED TUNER CIRCUIT
PWB FROM -01 TO -02. ADDED TUNER CIRCUIT
.1 CAPS TO DIODE BRIDGE. ASSY -02 TO -03
.1 CAPS TO DIODE BRIDGE. ASSY -02 TO -03
ADDED -01 ASSY.
ADDED -01 ASSY.
CONTROL ISSUE
CONTROL ISSUE
CW
CW
R41
2.2K
INSERT JACK
D20
R68
1M
WFB
WFB
1
1
J2
of
of
RING
RING_SW
TIP_SW
TIP
SLVE_SW
SLEEVE
1N914
C42
2.2
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
Drawing Size:
Drawing Size:
Drawing Type: Schematic
Drawing Type: Schematic
Class Code:
Class Code:
Sheet
Sheet
3
2
TLO-72
R43
22K
C31
.047
R45
100V
10K
C68
.22
+40V
+40V
+16V
+16V
ST. LOUIS MUSIC, INC
ST. LOUIS MUSIC, INC
Date:
Date:
8/11/00
8/11/00
C
C
NONE
NONE
2
2
IC3:A
1
R56
2.2M
D15
1N914
Last Used
AP1
C79
D38
HS2
IC5
ICL1
INS8
J28
JOW4
JW90
NUT2
P11
PWB1
Q27
R111
S3
SCRW6
N01172 WFB
N00769
N00769
N00679
N00679
Ecr(s)/Ecn(s)
Ecr(s)/Ecn(s)
First Used On:
First Used On:
Drawing Title:
Drawing Title:
Drawing Number:
Drawing Number:
R44
1.5K
C27
.015
TP5
R57
15K
C54, C55, C58, C61
D7, D8, D11, D26, D30
J6, J7, J9, J14, J16, J17
JOW3
JW7, JW16
R27, R87, R93, R109
11880 Borman Drive, St. Louis, MO 63146
11880 Borman Drive, St. Louis, MO 63146
C18
.0056
100V
R29
4.7K
C19
.01
P3
100V
SHAPE
10K L
D
Q7
C38
35V
Spare Gate Table
G
S
J175
10
Not Used
WFB
WFB
REM
REM
Chgd By Appvd by
Chgd By Appvd by
PWA - GUITAR AMP
PWA - GUITAR AMP
B
Q16
D
G
S
J175
R52
680K
C24
R22
4.7K
2.2
C17
.22
CW
2_PWRAMP
C33
R48
.001
27K
100V
Spare Gates
07S279-XX
07S279-XX
Date
Date
1
1
2
2
3
3
4
4
TP2
C6
R11
2.2K
10
TP1
IC1:A
3
1
2
TLO-72
R7
22K
C56
.0015
100V
CW
P10
HIGH
10K L
C46
2.2
C47
R82
CW
P8
LOW
10K A
1
P9
MID
500 A
CW
5
6
TLO-72
R90
1.5K
R1
C4
.22
C5
.1
IC5:B
IC1:B
5
7
5
6
R42
150K
C29
56 pF
200V
C7
R2
22K
R9
680
C10
.015
Q1
D
S
J175
CLEAN CHANNEL
IC3:B
7
TLO-72
R46
1K
R94
47K
6
TLO-72
C2
.0033
100V
R3
22K
R8
1M
7
35V
R18
1.5K
1
R12
10K
A
G
B
LEVEL
C32
2.2
TP6
C34
E
DSP VERSION (USES 06A279-02 PWB) :
ASSY # 07-279-01 65 WATT VERSION
ASSY# 07-279-03 120 WATT VERSION
ASSY# 07-279-04 65W EURO VERSION
ASSY# 07-279-05 120W EURO VERSION
ASSY# 07-279-06 65W TUNER VERSION
ASSY# 07-279-07 120W TUNER VERSION
GTX212
DCBA
DCBA
E
E
F
F
©2007 LOUD Technologies Inc. All rights re served PWA DSP Guitar Amplifi er PCB Schematics PAGE 3
Page 4
DCBA
DCBA
FE
FE
TEST POINT CONDITIONS FOR POWER AMP:
1kHz SINE WAVE INPUT INTO INSERT TIP, 4 OHM LOAD
0V
C I
C
B
-.06V
-35V
I
RED
CH A
D27
1N914
DC
0V
.23V
1.3V
0V
35V
10V
0V OR +10V
D16
S2
C
0V
+10V
D24
1N914
OO
R51
22
R55
33K
C
C I
CHAN SW.
TP
9
10
11
1
1
2
2
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 INSTRUCTIONS.
THAT EXPLAINED IN THE OPERATING INSTRUCTIONS.
4
4
NOTES:
NOTES:
1) CAUTION: SHOCK HAZARD!!
1) CAUTION: SHOCK HAZARD!!
2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL.
2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL.
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE
12
13
14
15
16
CH A GAIN 1
CH A GAIN 2
CH B CLEAN
B'
D'
DSP VERSION
ASSY# 07-279-02
GAIN SELECT
J21
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE
TOUCHING INTERNAL PARTS.
TOUCHING INTERNAL PARTS.
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.
AND 10 MEGOHM DIGITAL VOLTMETER.
AND 10 MEGOHM DIGITAL VOLTMETER.
1Vpp
.65Vpp
32.5Vpp
32.5Vpp
30Vpp
1.5Vpp RIPPLE
1.5Vpp RIPPLE
.5Vpp RIPPLE
SWITCHING LOGIC
A
-10V +10V
-10V
J4
1
2
3
4
S1
C65
1
2
1
3
4
5
C75
6
1
AC
0V +10V
CH. A GAIN 1&2 ACTIVE
CH. A/B SWITCH
O O
88-606-16
DOMESTIC VERSION
ONLY -01, -03
DNP FOR -04, -05
-06, -07
-16V
D18
GRN
MPS-A55
-16V
I
CMN
Q17
R50
2.2K
S3
+40V
MODE
CH B
R71
1M
+16V
R106
7.5K
1/2W
D38
RED
PWR
C41
.01
100V
R74
1.5K
1N746ARL
D25
3.3V
4
3
2
1
D22
1N914
R81
470
C26
TP13
47
35V
TO SPEAKER
C59
.047
100V
R97
10
1/2W
C14
100
35V
C28
.047
100V
C12
100
35V
N01172 WFB
N00769
N00769
N00679
N00679
Ecr(s)/Ecn(s)
Ecr(s)/Ecn(s)
11880 Borman Drive, St. Louis, MO 63146
First Used On:
First Used On:
Drawing Title:
Drawing Title:
Drawing Number:
Drawing Number:
11880 Borman Drive, St. Louis, MO 63146
J5
+
J15
-
F
F
C44
.047
100V
TIP
TIP_SW
SLVE_SW
SLEEVE
+16V
-16V
JOW4
JOW2
C16
.047
100V
WFB
WFB
REM
REM
Chgd By Appvd by
Chgd By Appvd by
PWA - GUITAR AMP
PWA - GUITAR AMP
4 Ω
J3
EXT. SPKR JACK
07S279-XX
07S279-XX
Date
Date
1
1
2
2
3
3
4
4
R31
3.3K
1/2W
C22
220 pF
100V
C21
1
2N5087
C39
1
TP11
+40V
Q11
TIP-142
D12
MR-752
200V PIV
R36
220
R39
470
R60
470
D35
D13
1N914
D21
1N914
R61
220
TIP-147
C43
220 pF
100V
-40V
C79
.1
100V
C78
.1
100V
3
REV
2
2
1
1
0
0
REV Date DESCRIPTION
REV Date DESCRIPTION
Checked:
Checked:
Released:
Released:
Plot Date:
Plot Date:
Plot Time:
Plot Time:
Tolerance:
Tolerance:
C67
-40V
04/17/03
Date DESCRIPTION Ecr(s)/Ecn(s) Chgd By Appvd by Date
3/7/02
3/7/02
10/24/01
10/24/01
3/12/01
3/12/01
Signatures:
Signatures:
Drawn:
Drawn:
Thu Apr 17, 2003
Thu Apr 17, 2003
R37
4.7
R33
.47
5W
R83
.47
5W
Q15
-40V
TP12
TP14
+40V
C69
4700
C70
4700
.1
100V
C66
100V
.1
TP15
ADDED -06, -07 CONFIG
ADDED -04, -05 ASSY
ADDED -04, -05 ASSY
PWB FROM -01 TO -02. ADDED TUNER CIRCUIT
PWB FROM -01 TO -02. ADDED TUNER CIRCUIT
.1 CAPS TO DIODE BRIDGE. ASSY -02 TO -03
.1 CAPS TO DIODE BRIDGE. ASSY -02 TO -03
ADDED -01 ASSY.
ADDED -01 ASSY.
CONTROL ISSUE
CONTROL ISSUE
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
Drawing Size:
Drawing Size:
Drawing Type: Schematic
Drawing Type: Schematic
Class Code:
Class Code:
Sheet
Sheet
E
E
R20
TIP-147
120WATT VERSION
ONLY -03, -05, -07
DNP -01, -04, -06
TP10
100V
Q19
MJE-340
R62
1/2W
D23
1N914
10
C45
C72
.0033
250V
C71
.0033
250V
+40V
R63
220
Q12
D14
1N914
R24
1.5K
1/2W
D17
1N914
C11
.001
100V
+40V
MPS-A06
1/2W
J23
J13
J22
C40
220 pF
100V
R65
OPT1
OPT2
OPT3
J20
J19
R101
100
27K
R13
1.5K
R40
330
AP1
CW
500
ADJ AP1 FOR 7mV
ACROSS R83,
NO SIGNAL, NO LOAD
R104
.1
5W
R104 = .1 OHM 5W 120WATT VERSION -03, -05, -07
R104 = 0.2 OHM 5W 65WATT VERSION -01, -04, -06
T1
1 3
4
CT
2
5
94-116-01
J27
J26
J28
C57
10
35V
R100
330
220
DSP VERSION (USES 06A279-02 PWB) :
ASSY # 07-279-01 65 WATT VERSION
ASSY# 07-279-03 120 WATT VERSION
ASSY# 07-279-04 65W EURO VERSION
ASSY# 07-279-05 120W EURO VERSION
ASSY# 07-279-06 65W TUNER VERSION
ASSY# 07-279-07 120W TUNER VERSION
CONNECT APPROPIATE
XFMR LEAD TO J17 FOR
DESIRED LINE VOLTAGE.
J17
"PARK" THE THREE
UNUSED LEADS ON
ISOLATED TABS
J26, J27, & J28.
J19
240V
GRAY/WHT
230V
120V
100V
BROWN
BLK
BLUE
WHITE
2N5088
Q18
J23
J13
J22
Q9
+40V
GBPC602
C77
.1
100V
C76
100V
.1
+16V
+16V
R86
2.2K
R32
4.7K
R108
1.5K
J12
1
2
3
4
5
6
S
D
J112
Q10
G
2_PWRAMP
-40V
D'
A
J25
2N5087
R66
C51
220
Q14
R49
680
47
LINE
J24
R70
22K
R69
47
Q20
2N5087
C35
220 pF
ICL1
3A
NEUTRAL
C73
.01
100V
Q13
+16V
E
R19
2.2K
R15
1M
C13
100V
C
.01
A
D19
1N914
C48
.1
MPS-A13
R67
2.2K
+16V
1N914
D36
Q22
+16V
R54
C37
R98
2.2K
R25
10K
1M
.01
100V
D37
1N914
-16V
R110
3.3K
R53
47K
B
R103
33K
C74
.047
100V
MPS-A55
-16V
R102
Q27
C36
.1
MPS-A13
33K
R105
1M
B'
EXPORT WIRING
XFMR PART # 94-116-40
DCBA
DCBA
4.7
R96
270
5W
R95
270
5W
R85
.47
5W
1N5353B
1N5353B
WFB
WFB
2
2
Q5
TIP-142
MR-752
200V PIV
R23
.47
5W
-40V
D29
16V
D28
16V
of
of
Q23
+40V
D5
ST. LOUIS MUSIC, INC
ST. LOUIS MUSIC, INC
Date:
Date:
8/11/00
8/11/00
C
C
NONE
NONE
2
2
GTX212
©2007 LOUD Technologies Inc. All rights re served PWA DSP Guitar Amplifi er PCB Schematics PAGE 4
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