Ampeg PF-350 Schematic
D
C
87
RED
LED1
12
R30
4.7K
Q1
2N5551
Q3
D9
IN4148
3
+
1
U1-A
2
-
R32
470K
ICTL074CNDIP14
4.7K
R3
D13
IN4148
5
+
U1-B
6
-
R7
R31
47K
A50K
Gain
J2
Input
Peak
2N5551
+15V
S1-B
4
5
6
D1
IN4148
IN4148
D2
R2
R36
4.7K
68K
S1-A
1
2
3
1
6
5
2
4
3
PAD
R37
-15dB
15K
C4
-15V
0.022UF
ICTL074CNDIP14
R1
1M
6
5
43
REV:
100
RELEASE TO PROTOTYPE
A00
RELEASE TO Pilot
+15V
ECO/DSR
ECOCHN0846
ECOCHN0884
2
DESCRIPTION
REV. BY:
John
John
1
March.19.2010
June 23,2010
DATE
ECOWD12942 B00 Change led 3 RJ 6/30/2010
C13
100PF
2
3
-15V
R25
33K
ICTL074CNDIP14
C9
0.1UF
12
13
R49
10K
1
U4-A
NE5532P
+
U1-D
-
D3
C12
0.22UF
A50K
R22
Treble
0.1UF
4.7K
R6
C6
NE5532P
5
6
R47
68K
C20
100PF
R46
22K
R21
6.8K
IN4148
D12
D10
IN4148
C30
0.022UF
R8
33K
7
C1
4700PF
C29
220PF
R9
R10
10K
10K
C3
0.22UF
R12
10K
Midrange
R5
2M
ICTL074CNDIP14
10
+
9
-
1K
R16
10K
R11
R13
4.7K
C2
4700PF
B50K
R15
R14
7.5K
R17
33K
U1-C
8
A50K
R20
BASS
D11
IN4148
10K
R18
R19
C5
0.01UF
C8
0.022UF
C31
1K
0.22UF
U4-B
IN4148
R48
D4
IN4148
C7
0.1UF
10K
R24
150K
7
R23
22K
D5
IN4148
R50
C25
220
22UF
50V
D6
IN4148
Preamp LINE OUT+
R51
C26
220
50V
22UF
+15V
-15V
U5-B
7
A50K
R29
D7
IN4148
D8
IN4148
Volume
R55
1.5K
C18
100PF
R27
10K
R26
10K
14
2
3
1
U5-A
TL072CN
R28
100
R44
100K
C10
0.22UF
5
6
TL072CN
J6-1
Preamp LINE OUT-
J6-2
GND
J6-3
SEND
J6-4
J6-5
RETURN
J6-6
J6-7
GND
GND
D
C
J5-1
PREAMP SIGNAL OUT
J5-2
GND
AMP SIGNAL RETURN
J5-3
LIMIT_LED
J5-4
LIMITER
100PF
7
U3-B
NE5532P
100PF
1
U3-A
R57
100
R56
100
6
5
2
3
C14
R4
47K
C15
R33
47K
NE5532P
R38
10K
R34
10K
R39
10K
10K
R35
B
Audio in
J4
PA1
3
2
1
1
C21
10UF
25V
C22
10UF
25V
R40
100K
R41
100K
R42
R43
1K
C16
470PF
C17
470PF
1K
A
78
6
Phone
3
2
1
4
5
6
Q2
2N5551
S2-B
LED2
YELLOW
12
Limit
J1
2035216-XX
SCH1
SCHEMATIC PCB ASSY PREAMP PF350
2035215-01
PCB1
PCB FAB FR4 DOUBLE 1 OZ 1.6mm Preamp board PF350
5
R58
22K
R45
4.7K
C35
0.22UF
10K
R54
R59
4.7K
LED3
12
4.7K
Fault
YELLOW
2N5551
Q5
2N5551
Q4
R60
100K
R52
+15V
R63
22K
C
2010 LOUD TECHNOLOGIES INC.
U5-C
-15V
R61
100K
TL072CN
8
4
MUTE
NE5532P
8
4
8
4
U4-C
NE5532P
ALL RIGHTS RESERVED
THE INFORMATION CONTAINED HEREIN
IS PROPRIETARY AND CONFIDENTIAL
PROPERTY OF LOUD TECHNOLOGIES INC.
U3-C
4
3
C19
10UF
C32
10UF
1
3
S2-A
Limit
2
C23
10UF
C24
10UF
DRAWN:
CHECKED:
NP ENG:
MATERIAL:
MFG:
MFG ENG:
ISSUED:
C27
10UF
C28
10UF
10K
R53
C33
10UF
C34
10UF
DATEAPPROVALS
March.19.2010John
J5-5
+15V
J5-6
GND
J5-7
J5-8
-15V
J5-9
MUTE
1
PA2
TECHNOLOGIES INC. WOODINVILLE WA. USA
SCHEMATIC PCB ASSY PREAMP PF350
SIZE
SCALE:
D
DWG FILE:
NONE
DWG. NO.
2035216-XX
2
SHEET
B
A
REV.
B00
OF
1
1
1
Loading...