Power Amp (Pcb Version 7.0) - JBL PowerBass PB12 Service Manual

1 2 3

Power Amp (PCB version 7.0)

I
R100
NOT USED
Un-designated Connector
H
To U1 Pin 11
+15V 6 +15
mute 5
GND 4
GND 3
SIG 2
1 -15
-15V
C24
To U1 Pin 4
NOT USED
330nF
R21
G
4K7
C25
NOT USED
R22
42K2
R23
CONNECTOR
187k
AV SW
4
F
12 1
2
14
U1 3
13
TLO64
NOT USED
11
R24
NOT USED
R25
NOT USED
E
R32
47k
10
R33
9
D
23k7
C26
10nF
C
B
A
1 2 3
4 5 6
SIGNAL LED & AUTO MUTE
TLO64
4 C41
3 R50
1
U1
2
2k2
11 1uF
C40
R40
R41
1k 1000k
10uF
C6
R7A R7B R7C
10k 10k 10k
1N5234B
100nF
R26
1N4148
R27
D7
6k8
10k
R28
1k2 R1A
7k5
R29
1k2
R31 R30
D8
47k
10k
1N4148
R add
4
R9
220k
R34
8
U1
NOT USED
10k
C32
TLO64
22uF
C27
11
3n3F
C1
2200uF
R8B
R8A
10k
10k
C2
2200uF
4 5 6
7 8 9
R46
R45 1000k
470K
4
1N4148
5
D14
U1
6
TLO64
D11
1N4148
11
C42
R43
1000k
D12 100uF
1N5242B R42
R44
1N5242B
D10
100k
22k
D6 R6
47R
S64
+6V
D5
1N4735A
C20
1N5265B
V+
D3
UVLO 220nF
R1B R1C
7k5 7k5
D4
R3 O/P
8M2
R4
33k
1N4938
V-
L2
8u5H
C3
+15V
100nF
S/D
R5
FR
C21 56k2
D1
100nF
I/P
GND
D2
C22
-15V
100nF To AC Feed
MODULE
1N4744A
To AC Return
CMC
V+
V-
R2A R2B R2C
BR RECT
7k5 7k5 7k5
2m2H
RS604
41
7 8 9
10 11 12
Not Connected
V+ LED LED Harness
2 2
7
3 3
D13
MOLEX 2 MOLEX 2
1N4148
R47
10k
R49 R48
4k7 4k7
Q1
R48 & R49 changed to 4k7
2N5457
SHORT CIRCUIT PROTECT
R13 R14
3k3
47k
Q11
R12
2N5401
1k
Q12
Q10
2N4401
R11
2N5401
1k
R10A R10B R10C
0.1R 0.1R 0.1R
L4
8u5H
C11
C10
4u7F
330nF
L3
L1
220uH 8u5H
R15
NOT USED
3AG FUSE
2A SloBlo
MCI 4632 TRANS. PRI.
TRX
QUICK FIT TERMINAL
To GND
TRANSFORMER IS MOUNTED ON FACEPLATE
AC Feed
QUICK FIT TERMINAL
C7A
100nF
GND
QUICK FIT TERMINAL
C7B
AC Return
100nF
QUICK FIT TERMINAL
Part No:
Version 7.0 (PWRAMP)
Date:
14-Feb-2001
Drawn:
MS/LL
Rev. Sheet:
2
1
10 11 12
13 14 15
LED1/2 Preamp
LED1/2 Preamp
On Harness On Harness
2 Clr LED 2 Clr LED
SPK 1
CZ
QUICK FIT TERMINAL
100nF
SPK 2
CW
QUICK FIT TERMINAL
NOT USED
On Faceplate
SW SPST
LIVE
To Power Cord
QUICK FIT TERMINAL
To Power Cord
2
of
13 14 15
I
H
G
F
E
D
C
B
A