Page 1
3-7-06 05/11/06
WFB
A
C
B Plot Time: Drawn: REV
Sheet
INITIAL ISSUE CHG CAP VALUES FM .22 TO .1
of 2 2NONE 8/25/05 Date:
Ecr(s)/Ecn(s)R01922
Appvd by Date
5 4
A A
B B
C C
D D
E E
Plot Date: Checked:
Released:
F F
G
G
5 4 31
2
BASS AMP3 1
2
NOTES:Date
Drawing Number:
Class Code: Drawing Type: Schematic
1901 Congressional, St. Louis, MO 63146
REM
ST. LOUIS MUSIC, INC THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
Chgd By DESCRIPTION
AND 10 MEGOHM DIGITAL VOLTMETER. 1) CAUTION: SHOCK HAZARD!!
TOUCHING INTERNAL PARTS. CAUTION:
Tolerance:
Drawing Title: First Used On:
Drawing Size:
Signatures: Thu May 11, 2006
07S598
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 SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND
THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL. CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL. THAT EXPLAINED IN THE OPERATING INSTRUCTIONS.
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED3-7-06 05/11/06
WFB
A
C
B Plot Time: Drawn: REV
Sheet
INITIAL ISSUE CHG CAP VALUES FM .22 TO .1
of 2 2NONE 8/25/05 Date:
Ecr(s)/Ecn(s)R01922
Appvd by Date
5 4
A A
B B
C C
D D
E E
Plot Date: Checked:
Released:
F F
G
G
5 4 31
2
BASS AMP3 1
2
NOTES:Date
Drawing Number:
Class Code: Drawing Type: Schematic
1901 Congressional, St. Louis, MO 63146
REM
ST. LOUIS MUSIC, INC THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
Chgd By DESCRIPTION
AND 10 MEGOHM DIGITAL VOLTMETER. 1) CAUTION: SHOCK HAZARD!!
TOUCHING INTERNAL PARTS. CAUTION:
Tolerance:
Drawing Title: First Used On:
Drawing Size:
Signatures: Thu May 11, 2006
07S598
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 SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND
THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL. CAPACITOR VALUES IN MICROFARADS, 50V-10% TOL. THAT EXPLAINED IN THE OPERATING INSTRUCTIONS.
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED
A
-15V
200VDC
+315V
15.5V
21
J5
21
J8 110mV1.1V
+12V
R30100K 1234
J12 1234
J9
AB
CSW5:B C51 .1
400V
C52 470pF
500V
R251K AB
CSW4:B
J18 250VDC
.01C33400V
.0047C44100V
R71100K
1/2W
1%
21
J6
0VDC
3.32M
1/2W
1%R15
C49 .1
400V
1M
1/2W
1%R35
R311K
AB
CSW4:A ULTRA HIGH
R26470
+315V
J17 C50 .1
400V
.001C35400V
C48 470pF
500V
R2100K
1/2W
1% R347.5K
1/2W
1% C1 .0047
100V
JACK BOARD BREAK-OFF PC BOARD
23
1IC1:A
NE5532
V5:A
{Label}
R4410M
1/2W
1%
221K
1/2W
1%R16
+315V
AB
CSW5:A
ULTRA LOW
R3468.1K
1/2W
1%
+11VDC OPERATE
-13VDC STANDBY
D1 1N914
75V PIV
+11VDC OPERATE
-13VDC STANDBY
V5:B
R69221K
1/2W
1%
CW
1M AP5 VOLUME
100K
1/2W
1%R20
R60100K
1/2W
1%
RING_SWTIP_SW SLEEVETIP RING
J4
CH 2 NORMAL
R447.5K
1/2W
1% C2 .0047
100V
RING_SWTIP_SW SLEEVETIP RING
J2
CH 1 NORMAL
RING_SWTIP_SW SLEEVETIP RING
J1
CH 1 BRIGHT
R1100K
1/2W
1%
R271M
100KR29 1MR28
C36 .001
400V
3.32K
1/2W
1%R17
65
7IC1:B
NE5532
22KR64
3.32K
1/2W
1%R21
CW
P71M A
BASS
CW
P61M A
TREBLE
RING_SWTIP_SW SLEEVETIP RING
J3
CH 2 BRIGHT
SWITCH BREAK-OFF PC BOARD #2
4. VOLTAGES IN RECTANGLES ARE PEAK TO PEAK SIGNAL
VOLTAGES. OTHER VOLTAGES ARE D.C.
5. TEST CONDITIONS: VOLUMES @ 10,
TONES FLAT, AND SWITCHES @ CENTER OR LEFT.
6. CIRCUIT GND LED GND CHASSIS GND .
