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TM
PowerBass Series
PB12 Subwoofer
SERVICE MANUAL
JBL Incorporated
250 Crossways Park Dr.
Woodbury, New York 11797
REV2 10/2001
PB12
TABLE OF CONTENTS
Safety Information ……………………………………………………….3
Basic Specifications ………………………………….………………….4
Detailed Specifications ………………………………………………….5
Controls and their Function …………….……………………………….6
Speaker Connection …………………….……………………………….7
Operation ………………………………….….………………………….10
Troubleshooting………………………………………………………….11
Test Setup and Procedure ……………………………….…………….12
Service Bulletin JBL 2001-03 ………………………………………….13
Service Bulletin JBL 2001-05 ………………………………………….14
Service Bulletin JBL 2001-07 ………………………………………….15
Exploded and Packaging ………………………………...…………….16
Amplifier Exploded View ……………………………………………….17
Amplifier Faceplate …………………………………..…………………18
Integrated Circuit Diagrams…………………………………………….19
Testing Procedure…………………………………….…………………20
Electrical Parts List (PCB version 6.3 – 7.0)………………………….23
Electrical Parts List (PCB version 7.2) …………………………..……28
Printed Circuit Boards (PCB version 6.3 – 7.0)…… ……...…..…….32
Printed Circuit Boards (PCB version 6.4)………..… ……...…..…….35
Printed Circuit Boards (PCB version 7.2)…… ……...……………….36
Schematics
Preamp (PCB version 6.3 – 7.0)…………………… ………….39
Power Amp (PCB version 6.0 – 6.3)…………..……………….40
Power Amp (PCB version 7.0)………………………………….41
Preamp (PCB version 7.2)…………………………….. ……….42
Power Amp (PCB version 7.2)………………………………….43
2
PB12
SAFETY INFORMATION
100V
4.7uF
3
PB12
BASIC SPECIFICATIONS PB12 Subwoofer
4
PB12
DETAILED SPECIFICATIONS PB12 Subwoofer
5
PB12
PB12 Subwoofer Controls and their Function
1.
Power - These lights will be red when the unit is
plugged in and not receiving a signal; when the PB12
receives a signal, the lights will cycle to GREEN. If no
signal is received after 10-15 minutes the lights will
cycle back to RED (standby) until a signal is present
again.
2.
Level Control - The subwoofer Level Control, PB12,
(located on the rear panel) adjusts the volume of the
subwoofer relative to the rest of the system.
3.
LFE/Normal Switch - Ordinarily placed in the Normal
position - but switch to LFE when playing Dolby
DigitaL, DTS or other digital surround modes - see
page 9.
4.
Phase Switch - Changes the subwoofer’s output to
be in phase or 180 degrees out of phase with the
program material.
Front Panel
Rear Panel
5.
Crossover Frequency - Sets the highest frequency
the subwoofer will reproduce.
6.
Line Input - Main Input connection to subwoofer
(preferred).
7.
Speaker In Jacks - Main Input connection to
subwoofer when line level, subwoofer, or pre-amp
output connectors are not available, or when a high
pass filter (set at 150Hz) to main loudspeakers is
desired through the Speaker Output Jacks.
8.
Speaker Out Jacks - Connected to main
loudspeakers when the Speaker Input Jacks are used.
9.
Power Switch - Turns the PB12 on or off.
6
PB12
Speaker Connection
When we designed the PB10
and PB12 powered
subwoofers, our goal was to
offer the user the best possible
performance combined with
the most flexible and complete
installation options. Please
look over the following three
examples to determine which
description best matches your
system and follow the
corresponding hookup
instructions.
To use the binding-post
speaker terminals with bare
wire, unscrew the collar until
the hole through the
centerpost is visible under the
collar.
Insert the bare end of the wire
through the hole in the post,
then screw the collar back
down until the connection is
tight. The holes in the center
of the collars are intended for
banana-type connectors.
Dolby Pro Logic (Non-Digital)-Speaker Level
Use this installation method for
Dolby Pro Logic applications
(not Dolby Digital, DTS or
other digital processing),
where the receiver/processor
does not have a subwoofer
output or a volume-controlled
preamp (line-) level output:
back of your front left and right
speakers.
Connect your receiver or
amplifier’s center, left and right
surround-speaker terminals to
the corresponding terminals on
the back of your center, left
and right surround speakers.
Connect your receiver or
amplifier’s front left and right
speaker terminals to the left
and right terminals on the
subwoofer that are marked
“High Level In.” Connect the
left and right terminals on the
subwoofer that are marked
“High Level Out” to the
corresponding terminals on the
7
PB12
Dolby Pro Logic (Non-Digital)-Line Level
Use this installation method for
Dolby Pro Logic applications
(not Dolby Digital, DTS or
other digital processing),
where the receiver/processor is
equipped with a subwoofer
output or a volume-controlled
preamp (line-) level output:
Use RCA-type patch cords to
connect the line-level
subwoofer outputs on your
receiver or amplifier to the linelevel inputs on the subwoofer.
IMPORTANT: Make sure that
the LFE toggle switch on the
subwoofer is in the “Normal”
position. Do not use the “LFE”
position with Dolby Pro Logiconly processors.
Note: If your receiver or
amplifier only has one
subwoofer output jack, then
you may connect the
subwoofer output on your
receiver/preamplifier to either
the left or right line-level input
on the subwoofer. It makes no
difference which jack you
choose.
Connect each speaker to the
corresponding speaker
terminals on your receiver or
amplifier.
8
Make sure your receiver or
processor is configured
correctly; Make sure that the
subwoofer is configured as
“On.”
Note for advanced users: If
your receiver/processor has a
built-in low-pass crossover
filter for the subwoofer output,
then the LFE switch should be
set to the “LFE” position to
bypass the subwoofer’s
internal crossover.
PB12
Dolby Digital or DTS (or Other Digital Surround Mode) Connection
Use this installation method for
Dolby Digital, DTS or other
digital surround processors:
IMPORTANT: Make sure that
the LFE toggle switch on the
subwoofer is in the “LFE”
position. Use the line-level
input jacks for the lowFrequency Effects channel.
Connect these jacks to the LFE
output or subwoofer output on
your receiver or amplifier.
Note: If your receiver or
amplifier only has one
subwoofer output jack, then
you may connect the
subwoofer output on your
receiver/preamplifier to either
the left or right line-level input
on the subwoofer. It makes no
difference which jack you
choose.
Connect each speaker to the
corresponding speaker
terminals on your receiver or
amplifier.
Make sure that you have
configured your surroundsound processor for
“Subwoofer On”or “LFE On.”
9
The front left, front right, center
and rear speakers should be
set to “Small” or “Large”
depending on their size and
frequency response. Consult
your receiver’s or processor’s
owner’s manual.
PB12
OPERATION
Power
When the unit is plugged in
and the power switch is on
and no signal is received, the
LEDs on the front of the unit
will turn red. When a signal is
present, the LEDs will turn
green.
Note: It will take several
minutes for the LEDs to turn
from green to red after the
input signal to the subwoofer is
removed. Due to JBL’s
unique, high-output, highefficiency amplifier design,
power consumption is minimal
Level Control
The subwoofer Level Control
adjusts the volume of the
subwoofer relative to the rest
of the system. Proper level
adjustments depends on
several variables such as
room size, subwoofer
placement, type of main
speakers and listener position.
Adjust the subwoofer level so
that the volume of the bass
information is pleasing to you.
Crossover Adjustments
The Crossover Frequency
Control determines the highest
frequency at which the
subwoofer reproduces sounds.
If your main speakers can
comfortably reproduce some
low-frequency sounds, set this
control to a lower frequency
setting, between 50Hz-100Hz.
This will concentrate the
subwoofer’s efforts on the
ultradeep bass sounds required
by today’s films and music. If
you are using smaller bookshelf
speakers that do not extend to
the lower bass frequencies, set
the low-pass crossover control
to a higher setting, between
120Hz-150Hz. This control is
not used when the LFE switch
is in the “LFE” position.
10
when the subwoofer is not
receiving a signal.
PB12
Phase Control
The Phase Control determines
whether the subwoofer’s
piston-like action moves in and
out in phase with the main
speakers or opposite the main
speakers. There is no correct
or incorrect setting. Proper
phase adjustment depends on
several variables such as
subwoofer placement and
listener position. Adjust the
phase switch to maximize
bass output at the listening
position.
Remember, every system,
room and listener is different.
There are no right or wrong
settings; this switch offers the
added flexibility to adjust your
subwoofer for optimum
performance for your specific
listening conditions without
having to move your speakers.
If at some time in the future
you happen to rearrange your
listening room and move your
speakers, you should
experiment with the phase
switch in both positions, and
leave it in the position that
maximizes bass performance.
TROUBLESHOOTING
If you used the high-level
(speaker) inputs and there is
no sound from any of the
speakers:
If there is low (or no) bass
output:
•Check that receiver/amplifier
is on and source is playing.
•Make sure the connections to
the left and right “Speaker
Inputs” have the correct
polarity (+and-).
•Check that powered
subwoofer is plugged into
and active electrical outlet
and is switched on.
•Make sure that the subwoofer
is plugged into an active
electrical outlet and (PB12
only) switched on.
•Check all wires and
connections between
receiver/amplifier and
speakers. Make sure all
wires are connected. Make
sure none of the speaker
wires are frayed, cut or
punctured.
•Adjust the crossover point.
•Review proper operation of
your receiver/amplifier.
•Flip the Phase Control switch
to the opposite position.
•If you are using a Dolby
Digital/DTS receiver or
processor, make sure that the
subwoofer adjustments on
the receiver/processor are set
up correctly.
•Slowly turn the Level Control
clockwise until you begin to
hear the desired amount of
bass.
11
If you used the line-level
inputs and there is no sound
from the subwoofer:
•Check that receiver/amplifier
is on and a source is playing.
•Check that powered
subwoofer is plugged into an
active electrical outlet and is
switched on.
•Check all wires and
connections between
receiver/amplifier and
subwoofer. Make sure all
wires are connected. Make
sure none of the wires are
frayed, cut or punctured.
•Review proper operation of
your receiver/amplifier.
•Slowly turn the Level Control
clockwise until you begin to
hear the desired amount of
bass.
•Make sure that you have
configured your
receiver/processor so that the
subwoofer/LFE output is on.
PB12
PB12 TEST SET UP AND PROCEDURE
AC VOLT
METER (6V)
LEVEL
FROM
LINE-LEVEL
SOURCE
LINE LEVEL
CD PLAYER
Min
Max
LFE
PHASE
NORMAL
0
180
CROSSOVER
FREQUENCY
50 Hz
150 Hz
PRE AMP
L
PB10 or PB12
UNDER TEST
R
LINE LEVEL IN
FOR
LFE
USE L or R
L
AMPLIFIER
HIGH
LIVEL
IN
R
L
SPEAKER
OUTPUT
FROM
AMPLIFIER
HIGH
LIVEL
OUT
R
00229
SPEAKER
LEVEL
General Function
UUT = Unit Under Test
1. Connect one line level input cable (RCA) from signal generator to either Right or Left Level input on UUT. VOLUME
control should be full conterclockwise. Make sure the LFE/Normal switch is in the NORMAL position.
2. Turn on generator, adjust to 100mV, 50 Hz.
3. Plug in UUT; LED’s on the front panel may be either Red or Green. Turn VOLUME control full clockwise. Low Pass
control should be set fully clockwise (150 Hz).
4. LED should turn Green; immediately bass response should be heard and felt from port tube opening.
5. Turn off generator, turn VOLUME control fully counterclockwise, disconnect RCA cables.
6. Connect one pair of speaker cables to either high level input terminal on UUT. Cables should be connected to an
integrated amplifier fed by the signal generator.
7. Turn on generator and adjust so that speaker level output is 1.0V, 50 Hz. Turn VOLUME control full clockwise.
8. Green LED should light, immediate bass response should be heard and felt from the port tube opening.
Sweep Function
1. Follow steps 1-4 above, using a sweep generator as a signal source.
2. Sweep generator from 20Hz to 300Hz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or any other
noises. If any unusual noises are heard, remove driver and test.
Driver Function
1. Remove driver from cabinet; detach + and - wire clips.
2. Check DC resistance of driver; it should be 4.8 ohms.
3. Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier fed by
a signal generator and adjust so that speaker level output is 5.0V.
4. Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises.
12
Service Bulletin
Service Bulletin JBL2001-03 - March 2001
To:
This is considered a Minor repair
All JBL Service Centers
Models: PB10, PB12
Subject: Unit Will Not Switch To Standby Mode
When the power cord of the PB series subwoofer is plugged into a wall outlet, (and for the PB12 only, the power
switch is on), and an audio signal is present, the LED’s on the cabinet face will turn green, indicating the
subwoofer is in the ON mode. With the audio signal removed, it will take 10 - 15 minutes for the LEDs to turn
from green to red, indicating the subwoofer is now in the STANDBY mode. Power consumption is minimal in this
mode.
In the event you receive a PB10 or PB12 subwoofer with the complaint: “The unit will not switch to
standby mode, even when the audio signal is removed”, (indicated by the subwoofer’s green LED’s
remaining on), perform the following modification:
1) Set the unit on a padded surface and remove all external cables.
2) On the amplifier faceplate, remove the (10) Phillips mounting screws around the perimeter.
3) Remove the amplifier assembly from the enclosure. If the amp is turned and supported correctly, no other
connectors need to be unplugged.
4) Locate Zener Diode D10 and Resistor R42 (22kW). See illustration. These parts must be “swapped”, i.e.
R42 soldered into the D10 location, and D10 soldered into the R42 location. VERY IMPORTANT: Observe
polarity on D10 in new location.
5) Replace amplier; test subwoofer to assure the unit goes into the standby mode 10 - 15 minutes after
removing the Audio input signal.
Model
Serial number
Status
PB10
PB12
All serial numbers
affected
Unit may not switch to Standby
JBL Incorporated
mode
250 Crossways Park Dr.
Action
Swap locations:
Zener Diode D10,
Resistor R42 (22kW).
Observe D10 polarity.
Woodbury, New York 11797 (516) 496-3400 13
Service Bulletin
Service Bulletin JBL2001-05 - June 2001
To:
This is considered a Minor repair
All JBL Service Centers
Models: PB12
Subject: Popping Every Few Seconds During Play
In the event you receive a PB12 subwoofer with the complaint: “The subwoofer “thumps” or “pops”
every few seconds of play”, follow the procedure below:
Probable Cause:
Inductor L1 (220uH) may be damaged.
Check and Replace L1 if necessary:
1) Set the unit on a padded surface and remove all external cables.
2) On the amplifier faceplate, remove the (10) Phillips mounting screws around the perimeter.
3) Remove the amplifier assembly from the enclosure. If the amp is supported correctly, no other
connectors need to be unplugged.
4) Locate Inductor L1 on the main PCB. If the windings appear charred or burnt, it must be replaced.
5) Order JBL part# 80121 and replace L1.
6) Replace the amplifier assembly back into the cabinet; replace the screws.
7) Test the unit and confirm the original problem has been corrected.
JBL Incorporated
250 Crossways Park Dr. Woodbury, New York 11797
14
Service Bulletin
Service Bulletin JBL2001-07 - November 2001
To:
This is considered a Minor repair
All JBL Service Centers
Model: PB12
Subject: Possible Missing Diode D4
In the event you receive a PB12 subwoofer for any servicing reason, check for the presence
of diode D4 on the Main PCB close to the Power Amp Module (see illustration). If D4 is missing
or has been “cut out” of the circuit, it should be replaced; add JBL part# 50115. Observe
polarity.
Note: The presence or absence of D4, in itself, does not contribute to, or solve, an amplifer failure.
Purpose of D4 is to reduce the possibility of an occasional Turn-OFF pop noise.
Reference for general location only; all parts or designators may not conform exactly to this drawing.
JBL Incorporated
250 Crossways Park Dr. Woodbury, New York 11797
15
PB12
Exploded and Packaging Views
00223
5
4
2
6
1
7
8
MECHANICAL & PACKING PARTS LIST
3
1
12” Woofer
203500
2
Foot
203410
3
Outer Carton
203520
4
Owner’s Manual 120V
203430
5
Amplifier Complete
Not For Sale
6
Foot Screw
203411
Foam corners (package drawing):
(IMAGE REDUCED)
16
7
Top Corner 4/carton
203460
8
Bottom Corner 4/carton
203470
PB12
Amplifier Exploded View
1
5
6
2
3
00263
4
7
LEGEND
17
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
Amplifier Faceplate Parts
LEVEL KNOB
70313
PHASE
SWITCH
70150
LFE DEFEAT
SWITCH
70150
LEVEL
Min
Max
LFE
PB12
FACEPLATE
70325
PHASE
NORMAL
0
CROSSOVER
FREQUENCY KNOB
70313
180
CROSSOVER
FREQUENCY
50 Hz
HI LEVEL I/O
IN
108116
150 Hz
L
R
LINE LEVEL IN
FOR
LFE USE L or R
L
HI LEVEL I/O
OUT
108116
HIGH
LIVEL
IN
R
L
HIGH
LIVEL
OUT
POWER
SWITCH
70151
R
ON
STRAIN RELIEF
70305
120V
60 Hz,
180W
OFF
POWER CORD
80105
POWER
JBL INC. NORTHRIDGE, CA, USA Made In Canada
18
R
NRTL/C
CSA 22-2
UL 1490
00264
LR 110113
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
PB12
Integrated Circuit Diagrams
S53AMI/S64AMI - Power Amp module SAFETY PART
+6V 15
1
16
2
17
3
V+
NOTE: THE FOLLOWING PROCEDURES MUST BE
FOLLOWED WHEN INSTALLING NEW S53AMI/S64AMI
AMP MODULES:
+6V
FAILURE TO FOLLOW ONE OR MORE OF THESE STEPS
MAY RESULT IN THE INSTANT DESTRUCTION OF THE
MODULE WHEN POWERED UP.
V+
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.
18
4
O/P 19
5
20
6
21
7
22
8
+15V
23
9
+15V
SD
24
10
SD
FR
25
11
FR
I/P
26
12
I/P
GND
27
13
GND
-15V
28
14
-15V
V-
O/P
2. All AC powered test instruments (meters, oscilloscopes,
etc.) must have a floating ground, i.e., be connected to an
isolation transformer.
V-
3. Align and position the Amp Module before soldering.
5. Use only rosin-core or non-acid core solder; thoroughly
de-flux the surfaces after soldering.
00228
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:
(2) part# 60301S (screws)
(2) part# 60301N (nuts)
N-Chan JFET
Q1 2N5457
Q10,Q11 (MPSA56)
Q12 (2N4401)
3 Collector
3 Collector
2
Base
D
S
1
G
19
2
Base
1 Emitter
2
3
1
1 Emitter
2
3
00227
U1,U2 (LM324, TLO64))
4. Attach the amp Module with the mounting screws before
soldering or powering up.
PB12
Testing Procedure
20
PB12
Integrated Circuit Diagrams (Cont.)
21
PB12
Integrated Circuit Diagrams (Cont.)
22
PB12
PB12 Electrical Parts List
PB12 POWER AMP PCB Version 6.3 - 7.0.
Part #
Designator
Description
23
PB12
PB12 Electrical Parts List (Cont.)
PB12 POWER AMP section of PCB Version 6.3 - 7.0
Part #
Designator
Description
24
PB12
PB12 Electrical Parts List (Cont.)
PB12 POWER AMP section of PCB Version 6.3 - 7.0
Part #
Designator
Description
25
PB12
PB12 Electrical Parts List (Cont.)
PB12 PREAMP section of PCB Version 6.3 - 7.0
Part #
Designator
Description
26
PB12
PB12 Electrical Parts List (Cont.)
PB12 PREAMP section of PCB Version 6.3 - 7.0
Part #
Designator
Description
27
PB12 Electrical Parts List Version 7.2
Part#
Ref. Designator
Description
POWERAMP section of PCB Version 7.2
Resistors
40735
40735
40735
40735
40735
40735
40703
40740
40732
40111
40738
40738
40738
40738
40738
40105
40105
40105
40420
40420
40417
40718
40405
40736
40737
40722
40738
40739
40739
40738
40417
40417
40427
40403
40407
40420
40701
40741
40701
40406
40415
40701
40409
40409
R1A
R1B
R1C
R2A
R2B
R2C
R3
R4
R5
R6
R7A
R7B
R7C
R8A
R8B
R9
R10A
R10B
R10C
R11
R12
R13
R14
R15
R21
R22
R23
R24
R25
R26
R27
R28
R29
R30
R31
R32
R33
R34
R35
R40
R41
R42
R43
R44
R45
R46
R47
R48
7k5
7k5
7k5
7k5
7k5
7k5
8M2
33k
56k2
47 ohms
10k
10k
10k
10k
10k
NOT USED
0.1 ohms
0.1 ohms
0.1 ohms
1k
1k
47k
3k3
NOT USED
4K7
42K2
187k
NOT USED
NOT USED
6k8
10k
1k2
1k2
10k
47k
47k
23k7
10k
220K
1k
1000k
22k
1000k
100k
470K
1000k
10k
10k
2W
2W
2W
2W
2W
2W
.25W
1W
.25W
.25W
2W
2W
2W
2W
2W
5%
5%
5%
5%
5%
5%
5%
5%
1%
5%
5%
5%
5%
5%
5%
metal
metal
metal
metal
metal
metal
carbon
metal
metal
carbon
metal
metal
metal
metal
metal
.5W
.5W
.5W
.25W
.25W
.25W
.25W
5%
5%
5%
5%
5%
5%
5%
metal
metal
metal
carbon
carbon
carbon
carbon
.25W
.25W
.25W
5%
1%
1%
carbon
metal
metal
.25W
2W
0.25W
0.25W
2W
.25W
.25W
.25W
.25W
.25W
.25W
.25W
.5W
.25W
.25W
.25W
.25W
.25W
.25W
5%
5%
5%
5%
5%
5%
5%
1%
1%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
carbon
metal
carbon
carbon
metal
carbon
carbon
metal
metal
carbon
carbon
carbon
metal
carbon
carbon
carbon
carbon
carbon
carbon
28
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
Part#
Ref. Designator
Description
40726
40727
R49
R50
15k
2k2
.25W
.25W
5%
5%
C1
C2
C3
C6
C7A
C7B
C10
C11
C20
C21
C22
C24
C25
C26
C27
C32
C40
C41
C42
CW
CZ
2200uF
2200uF
100nF
100nF
100nF
100nF
4u7F
330nF
220nF
100nF
100nF
330nF
NOT USED
10nF
3n3F
22uF
10uF
1uF
100uF
NOT USED
100nF
100V
100V
50V
50V
250V
250V
100V
100V
250V
50V
50V
50V
+80/-20
+80/-20
20%
20%
20%
20%
20%
20%
20%
20%
20%
5%
Electrolytic 105C
Electrolytic 105C
mono ceramic
mono ceramic
ceramic/film
ceramic/film
BP/NP Electr DF<.1
mono ceramic
metallized polyester
mono ceramic
mono ceramic
mono ceramic
50V
50V
35V
16V
16V
16V
10%
10%
+80/-20
+80/-20
+80/-20
+80/-20
mono ceramic
mono ceramic
Electrolytic
Electrolytic
Electrolytic
Electrolytic
100V
20%
carbon
carbon
Capacitors
30710
30710
30502
30502
30521
30521
30718
30523
30532
30502
30502
30527
30508
30513
30711
30715
30716
30717
30505
SAFETY
SAFETY
SAFETY
SAFETY
ceramic/film
Semiconductors
50105
50105
50114
50115
50113
50103
50104
50104
50112
50104
50112
50104
50104
60157
60155
60155
60156
50100
60102
60302
D1
1N4744A
15V
1w Zener
D2
1N4744A
15V
1w Zener
D3
1N5265B
62V
.5w Zener
D4
1N4938
Sig Diode
5%
EDN 10025 changes D4 on poweramp section from 1N4148 to 1N4938 part # 50115 June 26
D5
1N4735A
6.2V
1W
D6
1N5234B
6V
.5w Zener
D7
1N4148
Sig Diode
5%
D8
1N4148
Sig Diode
5%
D10
1N5242B
12V
.5w Zener
5%
D11
1N4148
Sig Diode
D12
1N5242B
12V
.5w Zener
D13
1N4148
Sig Diode
D14
1N4148
Sig Diode
Q1
2N5457
25V
N-chnl FET
Q10
2N5401
120V
PNP 600mA
Q11
2N5401
120V
PNP 600mA
Q12
2N4401
40V
NPN 600mA
DIODE BRIDGE RS604
6AMP
Bridge rectifier
SAFETY
U1
TLO64
Quad OpAmp
MODULE
S64AMI
Power Amp Module
SAFETY
Miscellaneous
80121
80122
L1
L2
220uH
8u5H
5 Amp
5 Amp
29
5%
5%
Gapped Ecore choke
ferrite bead
Part#
Ref. Designator
Description
80122
80122
80138
70322
108326
70323
80117
70324
70328
70325
80105
70305
70151
80116
L3
L4
CMC
LED 3
LED Harness
3AG TYPE
3AG FUSE
0.187" Tabs
0.250" Tabs
PB12 faceplate
Power cord
Strain relief
Switch
Transformer
8u5H
8u5H
3m6H
Molex 2 header
Molex 2 socket
3AG PC CLIP
2A fuse
SW SPST
MCI4632
5 Amp
5 Amp
5 Amp
ferrite bead
ferrite bead
choke
Male connector
Glued into cabinet With 2 Bi-color LED
2 PCB-mount fuse clips
SloBlo, 3AG
6
0.187" PCB fastons
1
0.250" PCB fastons
PB12 faceplate
Power cord
Strain relief
Power Switch
100VA
4632 transformer
5%
5%
PREAMP section of PCB Version 7.2
Resistors
40405
40405
40406
40406
40406
40406
40717
40717
40409
40731
40504
40412
40709
40732
40722
40722
40722
40722
40109
40412
40405
40109
40412
40403
40733
40734
40451
40402
40707
R1
R2
R3
R4
R5
R6
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R30
R33
R34
R35
LEVEL
LOPASS
4k7
4k7
100k
100k
100k
100k
2k7
2k7
10k
59k
45k3
33k2
68k1
NOT USED
NOT USED
56k2
6k8
6k8
6k8
0 ohms
6k8
0 ohms
604 ohms
33k2
4k7
604 ohms
33k2
10k
12k1
120k
137k
5k POT
Dual 20k POT
.25W
.25W
.25W
.25W
.25W
.25W
.25W
.25W
.25W
.25W
.25W
.25W
.25W
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
1%
1%
1%
carbon
carbon
carbon
carbon
carbon
carbon
carbon
carbon
carbon
carbon
metal
metal
metal
.25W
.25W
.25W
.25W
1%
5%
5%
5%
metal
carbon
carbon
carbon
.25W
5%
carbon
.25W
.25W
.25W
.25W
.25W
.25W
.25W
.25W
.25W
1%
1%
1%
1%
1%
1%
1%
1%
1%
20%
20%
metal
metal
metal
metal
metal
metal
metal
metal
metal
Log (A) Pot
Lin (B) Pot.
Capacitors Film Caps may be used in any position EXCEPT C1,C2
30
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
SAFETY
Part#
Ref. Designator
Description
30707
30707
30101
30101
30101
30101
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C16
C17
C18
C19
C20
C21
C22
C23
C30
200uF
200uF
220pF
220pF
220pF
220p
0r
0r
1k
100nF
100nF
100nF
100nF
100nF
150nF
330pF
330pF
100nF
100nF
100nF
100nF
NOT USED
40730
30504
30504
30504
30504
30530
30531
30100
30100
30502
30502
30502
30502
50V
50V
50V
50V
50V
50V
20%
20%
20%
20%
20%
20%
BP Electrolytic
BP Electrolytic
mono ceramic
mono ceramic
mono ceramic
mono ceramic
.25W
50V
50V
50V
50V
50V
50V
50V
50V
50V
50V
50V
50V
1%
10%
10%
10%
10%
5%
5%
20%
20%
20%
20%
20%
20%
Metal Resistor
mono ceramic
mono ceramic
mono ceramic
mono ceramic
mono ceramic
mono ceramic
mono ceramic
mono ceramic
mono ceramic
mono ceramic
mono ceramic
mono ceramic
5%
5%
5%
5%
5%
5%
Sig Diode
Sig Diode
Sig Diode
Sig Diode
Sig Diode
Sig Diode
Quad OP-AMP
Quad OP-AMP
Semiconductors
50104
50104
50104
50104
50104
50104
60102
60100
D50
D51
D52
D53
D54
D55
U1
U2
Miscellaneous
70150
70150
108324
108116
108116
LP DEFEAT SW
PHASE SWITCH
Li, Ri
HI LEVEL I/O
HI LEVEL I/O
1N4148
1N4148
1N4148
1N4148
1N4148
1N4148
TLO 64
LM324
(See pages 15-17 for more external parts)
SW SPDT
SW SPDT
RCA connector
Binding Post
Binding Post
90 Deg
OUT
IN
31
mini-Toggle
mini-Toggle
DUAL RCA-yellow
Binding Post
Binding Post
PB12
PB12 PCB’s version 6.3
32
PB12
PCB’s version 6.3 (Cont.)
33
PB12
PCB’s version 6.3 (Cont.)
34
H:\Brands\JBL\pb10-12\NewRev\Vers64 (Current screen) Scale=0.46
Wed Oct 24 10:52:35 2001
PCB version 6.4 (Power Amp only)
35
H:\Brands\JBL\pb10-12\PB10newrev\Vers72 (Current screen) Scale=0.45
Tue Oct 23 10:18:50 2001
(PCB version 7.2)
36
H:\Brands\JBL\pb10-12\PB10newrev\Vers72 (Current screen) Scale=0.45
Tue Oct 23 10:20:58 2001
(PCB version 7.2)
37
H:\Brands\JBL\pb10-12\PB10newrev\Vers72 (Current screen) Scale=0.45
Tue Oct 23 10:21:54 2001
(PCB version 7.2)
38
SCHEMATIC DIAGRAMS
Pre Amp (PCB version 6.3)
39
Power Amp (PCB version 6.0-6.3)
40
1
2
3
4
5
6
Power Amp (PCB version 7.0)
7
8
9
10
11
12
13
I
14
15
I
LED1/2 Preamp
LED1/2 Preamp
R46
1000k
R45
SIGNAL LED & AUTO MUTE
3
NOT USED
Un-designated Connector
To/From PREAMP
U1
2
H
+15V
mute
GND
GND
SIG
-15V
4 TLO64
To U1 Pin 11
+15
6
5
4
3
2
1
C42
D12
1N5242B
1000k
11
1000k
100uF
1N5242B
D10
-15
R42
R44
100k
22k
D13
R49
4k7
Q1
MOLEX 2
MOLEX 2
R48
4k7
On Harness
On Harness
2 Clr LED
2 Clr LED
H
R48 & R49 changed to 4k7
C24
To U1 Pin 4
NOT USED
2
3
1N4148
R47
10k
R43
R41
1k
TLO64
D11
1N4148
1uF
LED Harness
2
3
7
U1
6
2k2
R40
10uF
R50
4
5
1
11
C40
C41
1N4148
D14
Not Connected
V+ LED
470K
R100
2N5457
330nF
R21
4K7
G
G
SHORT CIRCUIT PROTECT
C25
R7A
NOT USED
R22
10k
R7B
10k
42K2
R7C
10k
C6
D6
100nF
R6
47R
1N5234B
S64
R23
CONNECTOR
AV SW
12
13
U1
1
2
3
14
TLO64
11
R26
1N4148
D7
6k8
2N5401
C20
1N5265B
R24
R1A
7k5
R1B
7k5
R1C
7k5
R29
1k2
R31
R10A
0.1R
220nF
R3
8u5H
1N4938
L2
23k7
NOT USED
10k
C32
22uF
C27
3n3F
C26
10nF
CW
QUICK FIT TERMINAL
NOT USED
S/D
U1
TLO64
11
8u5H
R15
NOT USED
R9
220k
R34
8
220uH
E
SPK 2
100nF
C21
100nF
D1
1N4744A
D
4
L3
+15V
QUICK FIT TERMINAL
100nF
L1
8u5H
CZ
330nF
V-
R add
9
SPK 1
C11
C10
4u7F
C3
47k
R10C
0.1R
8M2
10k
1N4148
R10B
0.1R
O/P
R32
10
F
1k
L4
D4
R4
33k
R30
D8
47k
R33
Q12
2N4401
R11
V+
D3
UVLO
R28
1k2
NOT USED
R25
R27
10k
NOT USED
NOT USED
E
Q10
3k3
2N5401
1k
+6V
D5
1N4735A
R14
Q11
R12
187k
4
F
R13
47k
FR
R5
56k2
D
I/P
D2
C22
100nF
GND
-15V
C
1N4744A
TRANS. PRI.
MCI 4632
TRX
To AC Feed
On Faceplate
SW SPST
LIVE
To Power Cord
QUICK FIT TERMINAL
QUICK FIT TERMINAL
To GND
MODULE
3AG FUSE
2A SloBlo
C
To Power Cord
To AC Return
TRANSFORMER IS MOUNTED ON FACEPLATE
AC Feed
CMC
V+
R2A
7k5
B
R8A
10k
R8B
10k
R2B
7k5
C1
2200uF
C7A
GND
V-
R2C
7k5
BR RECT
QUICK FIT TERMINAL
C7B
2m2H
QUICK FIT TERMINAL
100nF
100nF
B
AC Return
QUICK FIT TERMINAL
RS604
C2
2200uF
Part No:
Version 7.0 (PWRAMP)
Date:
41
A
Drawn:
Rev.
1
2
3
4
5
6
7
8
9
10
11
14-Feb-2001
A
MS/LL
1
Sheet:
12
2
of
2
13
14
15
1
2
I
3
4
5
6
7
8
9
10
11
12
13
14
15
I
Pre Amp (PCB version 7.2)
R27
5k POT
604r
R In
C18
C6
R11
R28 33k2
H
REMOTE
59k
330pF
6
GND
C19
1
330pF
SW SPDT
3
NOT USED
6
2
45k3
2
C7
7
U2
5
Phase Switch
NOT USED
R24
3rd Order Hi-Pass
R12
1
3
5
L In
68k1
LEVEL
2
3
2
1
220p
7
U1
R25 33k2
RCA CONNECTOR
R16
R14
DUAL RCA
C8
0r
H
C9
3
1k
0r
1
U1
TLO64
R17
R13
R35
R15
33k2
137k
NOT USED
56k2
604r
G
G
1N4148 1N4148
R10
1N4148
B-POST HiLev I/O
1N4148
D53
R1
C1
C3
10k
D50
D54
R6
4k7
R
R
L
L
200uF
100k
IN
12k1
C17
R9
2k7
C4
4k7
R8
C5
150nF
2k7
C20
C21
220pF
C16
R19
U2
20k POT
5
6k8
LM324
4
+15V
C23
100nF
R34
220pF
100nF
13
1
3
1N4148 1N4148
2
-15V
2
C22
12
14
U1
6
LO PASS CONTROL 2
E
C11
120k
100nF
F
3
6k8
-15V
C10
20k POT
1
U1
D52
R3
R2
C2
OUT
E
R18
8
9
D51
LO PASS CONTROL 1
R33
+15V
10
R5
R4
2nd Order LO-PASS
2nd Order Hi-Pass
200uF
F
D55
220pF
100nF
100nF
100nF
100nF
R20
LED 2
1
2
NOT USED
2nd Order LO-PASS
D
7
LED1
1
2
9
SW SPDT
1
13
14
2
GAIN STAGE
R26
3
4k7
100nF
NOT USED
12
6k8
11
9
U2
NOT USED
R23
0r
R30
10k
J1
10
To Pin 11 U1/U2
+15V
C30
8
-15V
10
To Pin 4 U1/U2
C13
CONN 1
6
5
4
3
2
1
+15V
mute
GND
GND
SIG
-15V
NOT USED
C
100nF
12
NOT USED
From PwrAmp
B
C12
U2
NOT USED
LO PASS CONTROL 4
From PwrAmp
LoPass Defeat Sw.
R21
8
R22
C
0r
To/From PWRAMP
D
NOT USED
LO PASS CONTROL 3
6k8
B
Part No:
Revision 7.2 (PREAMP)
Date:
42
A
Drawn:
Rev.
1
2
3
4
5
6
7
8
9
10
25-Oct-2001
MS/LL
A
Sheet:
1
11
1
of
2
12
13
14
15
1
I
2
3
4
5
6
7
8
9
10
11
12
13
LED1/2 Preamp
LED1/2 Preamp
R46
1000k
R45
SIGNAL LED & AUTO MUTE
470K
4 TLO64
U1
2
To/From PREAMP
H
CONN 2
+15V
mute
GND
GND
SIG
-15V
To U1 Pin 11
+15
6
5
4
3
2
1
C41
1N4148
D14
R50
C42
R40
10uF
1000k
100uF
D12
1N5242B
1000k
1N5242B
D10
-15
R42
R44
100k
22k
Molex 2
Header
D13
1N4148
R47
10k
R43
R41
1k
11
R49
4k7
Q1
1
2
1
2
L6
Not Used
TLO64
D11
1N4148
2k2
LED Harness
LED 3
7
U1
6
1uF
Not Used
L5
4
5
1
11
C40
15
I
Power Amp (PCB version 7.2)
3
14
Molex 2
Socket
R48
4k7
On Harness
On Harness
Bi-Clr LED
Bi-Clr LED
H
C24
NOT USED To U1 Pin 4
2N5457
330nF
R21
4K7
G
G
SHORT CIRCUIT PROTECT
C25
R7A
NOT USED
R22
10k
R7B
10k
42K2
R7C
C6
D6
10k
100nF
R6
47R
1N5234B
S64
CONNECTOR
AV SW
12
U1
14
11
R26
1N4148
D7
6k8
R11
2N5401
C20
1N5265B
R1A
7k5
R1B
7k5
R1C
7k5
R29
1k2
NOT USED
R31
D8
47k
R3
1N4938
C3
D
23k7
9
QUICK FIT TERMINAL
NOT USED
100nF
NOT USED
10k
TLO64
11
CW
S/D
U1
C32
22uF
C27
C26
10nF
8u5H
R15
E
SPK 2
NOT USED
R9
220k
R34
8
220uH
+15V
C21
100nF
3n3F
D1
1N4744A
10
L3
L1
8u5H
QUICK FIT TERMINAL
100nF
330nF
VL2
CZ
C11
C10
4u7F
R35
4
SPK 1
8u5H
8M2
R32
47k
R10C
0.1R
O/P
10k
1N4148
R10B
0.1R
L4
D4
R4
33k
R30
R10A
0.1R
220nF
UVLO
R28
1k2
R24
R33
F
1k
V+
D3
10k
NOT USED
R25
Q12
2N4401
Q10
R27
NOT USED
E
2N5401
1k
+6V
D5
1N4735A
1
2
3
TLO64
FR
R5
56k2
D
I/P
!
D2
GND
!
80116
TRX
MCI 4632
80117
3AG FUSE
2A SloBlo
TO TRANS. PRI.
LIVE
On Faceplate
SW SPST
!
-15V
1N4744A
*ALL SAFETY PRECAUTIONS IN THIS MANUAL SHOULD BE
!
QUICK FIT TERMINAL
QUICK FIT TERMINAL
!
C
Power Cord
To AC
IN THE SCHEMATIC DIAGRAM ARE
TRANSFORMER IS MOUNTED ON FACEPLATE
DESIGNATED COMPONENTS IN WHICH SAFTETY CAN BE OF
DIODE BRIDGE
!
SPECIAL SIGNIFICANCE WHEN REPLACING A COMPONENT
CMC
V+
! .
IDENTIFIED WITH
80105
To GND
MODULE
FOLLOWED DURING SERVICING. COMPONENTS IDENTIFIED
WITH THE IEC SYMBOL
70151
To AC
C22
100nF
C
3k3
R12
187k
4
13
R14
Q11
R23
F
R13
47k
R2A
7k5
B
R2B
7k5
V-
30535
!
CX
Not Used
R2C
7k5
R8A
10k
R8B
10k
AC
QUICK FIT TERMINAL
C7A
100nF
GND
C7B
100nF
AC
QUICK FIT TERMINAL
3m6H
C1
2200uF
30521
B
QUICK FIT TERMINAL
RS604
!
30521
C2
2200uF
Part No:
Revision 7.2 (PWRAMP)
43
A
Date:
25-Oct-2001
Drawn:
MS/LL
Rev.
1
2
3
4
5
6
7
8
9
10
11
1
A
Sheet:
12
2
of
2
13
14
15