Page 1
©2007 LOUD Technologies Inc. All rights re served Bass Amplifi er PCB Schematics PAGE 2 B-100R
11/11/05 04/24/06
C
DR050353 WFB WFB A B
4
CAUTION:
ABC D
Tolerance:
Plot Time:Plot Date:
E
R01904
F
4
2
NOTES:
1
Checked:Drawn:
Released:REV Date
Sheet 2 ofNONE
2
Date:
11/09/05
Appvd by
3 1
ABC DEF
2
Tue Apr 25, 2006 Drawing Title:
1901 Congressional, St. Louis, MO 63146
ST. LOUIS MUSIC, INC
3
Signatures:
Drawing Number: 07S243 BASS AMP SCHEMATIC
First Used On:
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
Ecr(s)/Ecn(s) Chgd By Date
1) CAUTION: SHOCK HAZARD!!
Drawing Type: Schematic
Drawing Size:
REDRAWN IN NEW FORMAT
FIX ORIENTATION OF OC1, FIX VALUES,
RE-CONNECT GND TRACE
TOUCHING INTERNAL PARTS.
Class Code:WFB DESCRIPTION 3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE 2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL.AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE THAT EXPLAINED IN THE OPERATING INSTRUCTIONS. TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.
AND 10 MEGOHM DIGITAL VOLTMETER. THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL.
11/11/05
04/24/06
C
DR050353 WFB WFB A B
4
CAUTION:
ABC D
Tolerance:
Plot Time:Plot Date:
E
R01904
F
4
2
NOTES:
1
Checked:Drawn:
Released:REV Date
Sheet 2 ofNONE
2
Date:
11/09/05
Appvd by
3 1
ABC DEF
2
Tue Apr 25, 2006 Drawing Title:
1901 Congressional, St. Louis, MO 63146
ST. LOUIS MUSIC, INC
3
Signatures:
Drawing Number: 07S243 BASS AMP SCHEMATIC
First Used On:
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
Ecr(s)/Ecn(s) Chgd By Date
1) CAUTION: SHOCK HAZARD!!
Drawing Type: Schematic
Drawing Size:
REDRAWN IN NEW FORMAT
FIX ORIENTATION OF OC1, FIX VALUES,
RE-CONNECT GND TRACE
TOUCHING INTERNAL PARTS.
Class Code:WFB DESCRIPTION 3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE 2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL.AND BE SURE POWER SUPPLY IS DISCHARGED BEFORE THAT EXPLAINED IN THE OPERATING INSTRUCTIONS. TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED
CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL.
AND 10 MEGOHM DIGITAL VOLTMETER. THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL.
-20V -40V
+40V
C
D19
1N914
75V PIV
D17
1N914
75V PIV
10C2335V
1312 14
TLO-74 IC1:D
R3910K
R36
470
+16V
R44
6.8K
R46
470
15KR45
D14
1N914
75V PIV
C28
.022
Q4MPS-A56
C27
.022
Q3MPS-A06
R54
1K
2W
R52
220
R50
220
.001
100VC29
R55.33
5W R56.33
5W
R35220K R343.3K
C24
100 pF
200V
-16V
470
R37
OPT2
10K
40V P-P
-6V DC
MPS-A13Q9
D10
1N914
75V PIV
.001
100VC30
D9 1N5366B
39V R47
330
TIP-142Q5
R57.33
5W R58.33
5W
D18
1N914
75V PIV
10
35VC46 D16
1N914
75V PIV
1N746D8
3.3V
33KR33
1N914D1375V PIV
R48
470
1KR42 150KOPT3
CW 25KOPT8
+20V
23 1 IC2:A
NE5532
45V P-P
6V DC
TIP-147Q8
1N914
75V PIVD15
-20V
100
35VC26
+20V 1N914
75V PIVD12
C25100
35V
Q6
TIP-142
J6
R59470
VTL-5C7
OC1
R3810K
1N914D1175V PIV
R431K
R4012K
6.8K
R41
65 7IC2:B
NE5532
R532.7K
Q7TIP-147
330R64
R512.7K
1K
2W
R49
820R63
1W
J7
SLVE_SWSLEEVE
TIP_SW
RINGRING_SW
TIP
J4 HEADPHONE
BIAS: AT TURN ON, VOLTAGE ACROSS R55,56,57 AND R58
IS BETWEEN 1 AND 10mV DC
40V P-P 5.5V P-P
OUTPUT: OUTPUT IS 18Vrms AT LESS THAN 2% THD WITH AN
INPUT OF 100mVrms
