Crate ca15 acoustic amp Schematic
ABC D
1
R1
4.7K
R34
4.7K
47K
47K
R2
R38
+13VDC
R52
100K
+13VDC
R51
100K
D1
1N914
-13VDC
D16
1N914
-13VDC
D2
1N914
470
1/4W
D15
1N914
1/4W
R33
470
R35
CHANNEL 1
2
CHANNEL 2
J1
INPUT
T/S
J3
INPUT
T/S
TIP_SW
SLVE_SW
SLEEVE
TIP_SW
SLVE_SW
SLEEVE
15mVrms
C2
TIP
.047
100V
100V
15mVrms
C27
TIP
.047
100V
100V
3
TEST CONDITIONS:
IKHZ SINE WAVE, CH1 AND CH2 LEVEL @ "10".
LOW, MID, HIGH @ "5", REVERB LEVEL @ "0" EXCEPT
WHEN TESTING REVERB RETURN, REVERB LEVEL @ "10".
NOTE:
LOAD J8 WITH 150 OHM LOAD AND DISCONNECT REVERB PAN.
LOAD J6 WITH 4 OHM LOAD ACROSS PINS 1& 2.
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.
5
6
47K
100 pF
200V
R4
2.2K
3
2
100 pF
200V
R36
2.2K
TLO-74
R3
C4
TLO-74
R39
47K
C13
E F
CHASSIS
MOUNTED
REVERB
PAN
C20
.01
100V
100V
R25
47K
5
6
NE5532
R23
10
7
R21
2.2K
.3Vrms
10
8
C7
CW
35V
35V
C26
CW
10
35V
35V
R5
1K
P1
50K A
LEVEL
R37
1K
10
P3
50K A
LEVEL
7
C3
2.2
50V
1
C28
2.2
50V
R9
10K
R40
10K
C10
2.2
J2
{Value}
9
R14
56 pF
200V
1.35Vrms
1
2
3
47K
C17
TLO-74
R11
D3
1N4002TR
100V PIV
D4
1N4002TR
100V PIV
10K
R15
2.2K
C5
.22
100V
R46
4.7K
P2
50K L
CW
P4
50K L
CW
P5
50K L
CW
+15VDC
LOW
HIGH
MID
C8
2200
25V
R10
82K
1/4W
C14
.01
100V
100V
C15
470 pF
200V
R7
100
R12
150K
+13VDC
J8
1
2
J7
1
2
20Vp-p
R13
2.2K
C18
2.2
1.35Vrms
12
14
13
TLO-74
C16
15 pF
200V
200V
D8
1N914
C11
47
35V
-15VDC
D5
-15VDC
C9
2200
25V
R8
100
1/4W
-13VDC
C12
47
35V
1N4002TR
100V PIV
D6
1N4002TR
100V PIV
100V
C6
.22
ASSY P/N 07-193-01
R22
15K
R19
330
.25Vrms
3
2
R50
1K
1N914
NE5532
R49
4.7K
C21
.033
R16
4.7K
D9
1
R20
560
1/2W
C19
.22
R48
3.3K
C29
.22
DS
Q1
J175
G
OC1
VTL-5C7
D10
1N914
R18
100
C23
.033
R47
4.7K
J9
CD INPUT
D11
1N914
R24
330
+15VDC
0
REV Date
Drawn:
Checked:
Released:
Plot Date:
Plot Time:
Tolerance:
REVERB
10K L
CW
P6
R27
2.2K
R41
2.2K
C22
05/03/05
Signatures:
Tue May 03, 2005
R17
22K
R53
47K
.6Vrms
D12
1N914
R26
1M
10
35V
CONTROL ISSUE
DESCRIPTION
Drawing Size:
Drawing Type: Schematic
Class Code:
Sheet 1 of
C24
R28
680
1
2
50V
TDA 2030
R29
22K
2.2
+13VDC
R42
10
R45
10
+15VDC
D14
1N4002TR
4
100V PIV
-15VDC
1N4002TR
100V PIV
D13
R30
1
R43
10
R44
10
C25
100V
6Vrms
.22
R31
470
R32
47
Power Table
RefDes
U1
-13VDC -15VDC
+13VDC
11
4
+15VDC
U2 3 5
U3
4
8
WFB
Ecr(s)/Ecn(s) Chgd By Date
THE INFORMATION CONTAINED ON THIS DRAWING IS PROPRIETARY TO
ST. LOUIS MUSIC, INC
Date:
REM
8/21/03
C
NONE
1
First Used On:
1901 Congressional, St. Louis, MO 63146
Drawing Title:
PWA - 15W ACOUSTIC AMP
Drawing Number:
TO SPEAKER
1
2
3
4
EXTERNAL SPEAKER
TIP
TIP_SW
SLVE_SW
SLEEVE
HEADPHONES
RING
RING_SW
TIP_SW
TIP
SLVE_SW
SLEEVE
Appvd by
07S193
J4
T/S
TRS
J6
J5
1
2
3
4
ABC DEF
CA15
©2007 LOUD Technologies Inc. All rights re served PWA Acoustic Amplifi er PCB Schematics PAGE 1
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