JBL PB 12 (serv.man12) Service Manual ▷ View online
PB12
13
Exploded and Packaging Views
1
2
3
(IMAGE REDUCED)
4
5
00223
6
7
8
MECHANICAL & PACKING PARTS LIST
1
12” Woofer
203500
2
Foot
203410
3
Outer Carton
203520
4
Owner’s Manual 120V
203430
5
Amplifier Complete
203550
6
Foot Screw
203411
Foam corners (package drawing):
7
Top Corner 4/carton
203460
8
Bottom Corner 4/carton
203470
PB12
14
Amplifier Exploded View
00263
1
2
5
6
3
4
7
LEGEND
1
Dual RCA jack
108320
2
Power Transformer
80116
3
Level Pot
40402
4
Crossover CONTROL
40707
5
Fuse Clips (2)
70323
6
2A SloBlo T Type Fuse (3AG)
80117
7
Power Switch
70151
PB12
15
Amplifier Faceplate Parts
Min
Max
LEVEL
50 Hz
150 Hz
LFE
NORMAL
PHASE
180
0
CROSSOVER
FREQUENCY
FREQUENCY
LINE LEVEL IN
L
R
FOR
LFE
USE L or R
L
HIGH
LIVEL
IN
R
L
HIGH
LIVEL
OUT
R
00264
120V
60 Hz,
180W
JBL INC.
NORTHRIDGE, CA, USA Made In Canada
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
R
LR
110113
110113
NRTL/C
CSA 22-2
UL 1490
ON
POWER
OFF
LEVEL KNOB
70313
PHASE
SWITCH
70150
LFE DEFEAT
SWITCH
70150
CROSSOVER
FREQUENCY KNOB
70313
PB12
FACEPLATE
70325
HI LEVEL I/O
IN
108116
HI LEVEL I/O
OUT
108116
STRAIN RELIEF
70305
POWER CORD
80105
POWER
SWITCH
SWITCH
70151
PB12
16
Integrated Circuit Diagrams
U1,U2 (LM324, TLO64))
2
Base
3 Collector
1 Emitter
1
2
3
Q10,Q11 (MPSA56)
2
Base
3 Collector
1 Emitter
1
2
3
Q12 (2N4401)
0
0
2
2
7
D
S
G
N-Chan JFET
Q1 2N5457
Q1 2N5457
+6V
15
16
17
V+
1
+6V
2
V+
3
18
4
O/P
19
5
O/P
20
6
V-
V-
21
7
22
8
SD 24
+15V 23
9 +15V
10 SD
FR 25
11 FR
I/P 26
12 I/P
GND 27
13 GND
-15V 28
14 -15V
00228
NOTE: THE FOLLOWING PROCEDURES MUST BE
FOLLOWED WHEN INSTALLING NEW S53AMI/S64AMI
AMP MODULES:
FOLLOWED WHEN INSTALLING NEW S53AMI/S64AMI
AMP MODULES:
FAILURE TO FOLLOW ONE OR MORE OF THESE STEPS
MAY RESULT IN THE INSTANT DESTRUCTION OF THE
MODULE WHEN POWERED UP.
MAY RESULT IN THE INSTANT DESTRUCTION OF THE
MODULE WHEN POWERED UP.
1.
Align white indent marker on Amp Module with indent
marker on main PCB; alternately observe position of label
on top of the module; incorrectly replacing the Module
180° in the PCB slot will result in its destruction.
marker on main PCB; alternately observe position of label
on top of the module; incorrectly replacing the Module
180° in the PCB slot will result in its destruction.
2.
All AC powered test instruments (meters, oscilloscopes,
etc.) must have a floating ground, i.e., be connected to an
isolation transformer.
etc.) must have a floating ground, i.e., be connected to an
isolation transformer.
3.
Align and position the Amp Module before soldering.
4.
Attach the amp Module with the mounting screws before
soldering or powering up.
soldering or powering up.
5.
Use only rosin-core or non-acid core solder; thoroughly
de-flux the surfaces after soldering.
de-flux the surfaces after soldering.
If the new S53AMI/S64AMI Amp Module has larger mounting
hole(s) in the case, and the stock screws no longer will fit,
and screws of the proper type cannot be obtained locally
order:
hole(s) in the case, and the stock screws no longer will fit,
and screws of the proper type cannot be obtained locally
order:
(2) part# 60301S (screws)
(2) part# 60301N (nuts)
S53AMI/S64AMI - Power Amp module SAFETY PART
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