Schematics - JBL PowerBass Series PB10 Preliminary Service Manual

1
R27
DUALRCA
604r
D
R In
C18 330pF
GND
C19 330pF
L In
R24
604r
RCA CONNECTOR
Binding Post R1
4k7
C1
200uF
C
R R
L L
C2
OUT
IN
200uF
R2
4k7
B
LED 2
NOT USED
Led Harness
LED1
1 1
2 2
NOT USED NOT USED
NOT USED
A
1
2
R11
57k6 C6
R28
33k2
6
220p
7
U1
5
LM324
R25 33k2
R10
10k
C3 220pF
+15V
R6
10
8
U1
R5
9
R4
-15V
R3 R9
2k7
C4
100k
C5
R8 C21
220pF
2k7 220pF
100nF
2nd Order LO-PASS: (Moved up 1 octave)
8
R22
5k6
11
From PwrAmp
From PwrAmp
2
3
LEVEL
REMOTE Pot
5k POT
SW SPDT
1
R12
1
3 2
2
45k3
2
3
1
3
Phase Switch
NOT USED
R13
33k2
2nd Order Hi-Pass
R33
9k09
-15V
2
1
C17 C16
U2
3
+15V
220nF 220nF
C20 C23
R34
60k4
100nF 100nF
7
0r Jumper
SW SPDT
R21
1
C12
13 2
9
14
U2
3
100n
12
LoPass Defeat Sw.
10
C13
R23
47n
0r Jumper
12
AMI
3
3rd Order Hi-Pass
R16
R14
68k1
1k3
6 2
7 C7 C8 C9
U2
5
3
330nF 330nF 330nF
R17
R35 R15
137k 11k3 243k
2nd Order LO-PASS
LO PASS CONTROL 1
C10
R18 20k POT
1 3
13k7
2
220nF
13
R19
14
20k POT
U1
13k7
12
5
4 6
C22 LO PASS CONTROL 2 C11
100nF
47nF
R20
5k6
GAIN STAGE
R26
To Pin 11 U1/U2
C30
4k7
NOT USED
R30
14k
9
8
U2
10
LM324
To Pin 4 U1/U2
Title
B10 PREAMP (6.3pcb)
Size Number
Tabloid
Date: 20-Apr-2000
File: T:\PB10 sch Folder\..\PB10 preamp Rev5.sch Drawn By:
4
D
1
U1
LM324
C
B
Un-designated Connector
+15V 1 +15V
2 mute
3 GND
4 GND
5 SIG
-15V 6 -15V
NOT USED
A
Revision 18
5
Sheet of 1 1
MS/LL
4