Download PowerBass Series PB12 Subwoofer PRELIMINARY SERVICE MANUAL

PowerBass Series
PB12
Subwoofer
PRELIMINARY
SERVICE MANUAL
JBL Incorporated, Inc.
250 Crossways Park Dr.
Woodbury, New York 11797
- CONTENTS -
BASIC SPECIFICATIONS
……….……………….…….……………..……………..2
DETAILED PB12 SPECIFICATIONS…………………….……….……..……………....3
CONNECTIONS…………………………………………………..……………..………..4
OPERATION………………………………….……………………………………..…….8
TROUBLESHOOTING…………………….…………….………………..….……..…….9
ELECTRICAL PARTS LIST
……………….…………..…………..……………….…10
MECHANICAL/PACKING PARTS LIST……………….……..……….…………….…15
PCB DRAWINGS……………….…………..……………….………..….………………16
SCHEMATICS
………..……………………..………………...…….………………..19
1
GENERAL SPECIFICATIONS
PB12 Subwoofer
Output Power
250 watts RMS
Driver
12" Woofer
Frequency Response
25Hz – to Low Pass Frequency setting
Inputs
Line Level (option: LFE); Speaker Level
Outputs
Speaker level fixed frequency 150Hz
Low-Pass Frequency
Variable from 50Hz – 150Hz
High-Pass Frequency
150Hz when using Speaker Level Output
Dimensions (H x W x D)
15 1/2" x 15" x 16"
394mm x 381mm x 406mm
(with feet) 17 1/2" x 15" x 16"
445mm x 381mm x 406mm
Weight
40 lb/18.2kg
Refinements may be made on occasion to existing products without notice but will always meet or exceed original
specifications unless otherwise stated.
PowerBass is a registered trademark of JBL Incorporated.
2
JBL PB 12
250W Powered Sub Amp
LINE VOLTAGE
US 120vac/60Hz
EU 230vac/50-60Hz
Yes/No
Yes
Yes
Hi/Lo Line
108-132
207-264
Nom.
120
230
Specification
Unit
QA Test
Limits
D
5.6
250
0.3
0.1
10
n/a
Ohms
Watts
%
%
mV-DC
n/a
n/a
145
1
0.5
20
Nominal
1 input driven
22k filter
22k filter
@ Speaker Outputs
Damping factor
>50
DF
35
Measured at amplifier board
Measured at the speaker cable. 150 Watts @
THD < 0.1 % @ 50 Hz
Input Sensitivity
Input Frequency
L&R
LFE input
Speaker/Hi Level Input
50
240
240
2.4
Hz
mVrms
mVrms
Vrms
50
±2dB
±2dB
±2dB
Nominal Freq.
To 150 Watts
To 150 Watts
To 150 Watts
Single input driven
Single input driven, LFE switch ON
Single input driven
Signal to Noise
SNR-A-Weighted
SNR-unweighted
SNR rel. 1W-unweighted
Residual Noise Floor
90
85
65
1
dBA
dBr
dBr
mVrms
80
80
60
2
Residual Noise Floor
1.5 mVrms(max)
Parameter
Amp Section
Type (Class AB, D, other)
Load Impedance (speaker)
Rated Output Power
THD @ Rated Power
THD @ 1 Watt
DC Offset
Input Impedance
Line Input (L, R,LFE)
Speaker/Hi Level Input
Filters
LP filter 4th order fixed
Subsonic filter (HPF) 2nd Order
LFE Low pass 2nd order
HP speaker out connector
Limiter
THD at Max. Output Power
Features
Volume pot Taper (lin/log)
HP Speaker out
Phase switch
LP Filter defeat switch
20K
4.7K
60-180
Fixed
200>LP<1K
200
100
n/a
ohms
ohms
2
n/a
n/a
Hz
± 10
Hz
Hz
Hz
± 10
± 10
n/a
Unit
Vrms
Vrms
Notes
Normal Operation
Normal operation, MOMS required
Conditions
Notes
Peak
145 Watts
relative to rated power
A-Weighting filter
relative to rated power
22k filter
relative to 1W Output
22k filter
Volume @max, using RMS reading
DMM/VOM (or A/P) BW=20 Khz.
Volume @max, w/ A/P Swept
Bandpass Measurement (Line
freq.+ harmonics) (BW=20 Khz)
Nominal
Nominal
2nd order variable + 2nd order fix-24 db/Octave
LFE input driven only
Speaker input driven - 4 Ohms
Speaker input driven - 8 Ohms
functional Maximum Output Power
Maximum THD as a result of limiting.
functional
functional
functional
functional
A Taper
Refer to Filter section
-LOG
YES
0-180
YES
-deg
Disables LP filter, intended for LFE
Input Configuration
Line In (L,R) & LFE
Spkr/Hi Level In
YES
--
functional
Dual RCA jack
YES
--
functional
Binding post connector L&R
Signal Sensing (ATO)
Auto-Turn-On (yes/no)
ATO Input test frequency
ATO Level LFE Input
ATO Level Speaker in
YES
50
4
50
Hz
mV
mV
functional
functional
functional
functional
Maximum acceptable level.
Maximum acceptable level.
ATO Turn-on time
Auto Mute/ Turn-OFF Time
Power on Delay time
Transients/Pops
ATO Transient
Turn-on Transient
Turn-off Transient
Efficiency
Efficiency
Stand-by Input Power
Power Cons. @ rated power
Short Circuit Protection
Thermal Protection
DC Offset Protection
Line Fuse Rating
USA-Domestic (120v)
EU (230v)
"
"
"
Amp connected and AC on, then
functional input signal applied
15
T before muting, after signal
removed
4
AC Power Applied
5
15
ms
minutes
3
sec.
5
50
50
mV-peak
mV-peak
mV-peak
n/a
2v-pp
2v-pp
@ Speaker Outputs
@ Speaker Outputs
@ Speaker Outputs
65
24
234
%
Watts
Watts
64
26
240
@ nom. line voltage
@ nom. line voltage
2
1
Amps
Amps
AC Line cycled from OFF to ON
AC Line cycled from ON to OFF
Nominal Line voltage 120 VAC
functional Direct short at output
functional
DC present at Speaker Out leads
YES
YES
YES
Auto turn of time (T) must be 5 > T < 15
Minutes
Type-T or Slo Blo-250 V
Type-T or Slo Blo-250 V
150 Watts @ 5.6 Ohms nominal line voltage
Amplifier should resume operation after short
External fuse with UL/SEMKO rated holder
3
READ THIS!
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: To prevent electric shock,
do not remove the grounding plug
on the power cord, or use any plug
or extension cord that does not have
a grounding plug provided.
Make certain that the
AC outlet is properly grounded.
Do not use an adapter plug
with this product.
The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to
alert the user to the presence of uninsulated
“dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude to constitute a
risk of electric shock to persons.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.
1. Read Instructions. All the safety and
operating instructions should be read before
the product is operated.
2. Retain Instructions. The safety and
operating instructions should be retained
for future reference.
3. Heed Warnings. All warnings on the
product and in the operating instructions
should be adhered to.
4. Follow Instructions. All operating and use
instructions should be followed.
5. Cleaning. Unplug this product from the
wall outlet before cleaning. Do not use
liquid cleaners or aerosol cleaners. Use a
damp cloth for cleaning.
6. Attachments. Do not use attachments not
recommended by the product manufacturer,
as they may cause hazards.
7. Water and Moisture. Do not use this
product near water – for example, near a
bathtub, wash bowl, kitchen sink or laundry
tub; in a wet basement; or near a swimming
pool; and the like.
8. Accessories. Do not place this product on
an unstable cart, stand, tripod, bracket, or
table. The product may fall, causing serious
injury to a child or adult, and serious
damage to the product. Use only with a cart,
stand, tripod, bracket, or table recommended
by the manufacturer, or sold with the
product. Any mounting of the product should
follow the manufacturer’s instructions, and
should use a mounting accessory
recommended by the manufacturer.
9. A Product and Cart Combination Should
Be Moved with Care. Quick stops, excessive
force, and uneven surfaces may cause the
product and cart combination to overturn.
10. Ventilation. Slots and openings in the
cabinet are provided for ventilation and to
ensure reliable operation of the product and
to protect it from overheating, and these
openings must not be blocked or covered.
The openings should never be blocked by
placing the product on a bed, sofa, rug, or
other similar surface. This product should
not be placed in a built-in installation such
as a bookcase or rack unless proper
ventilation is provided or the manufacturer’s
instructions have been adhered to.
2
Important Safety Precautions!
11. Power Sources. This product should be
operated only from the type of power source
indicated on the marking label. If you are
not sure of the type of power supply to your
home, consult your product dealer or local
power company. For products intended to
operate from battery power, or other
sources, refer to the operating instructions.
12. Grounding or Polarization. This product
may be equipped with a polarized alternating-current line plug (a plug having one
blade wider than the other). This plug will fit
into the power outlet only one way. This is a
safety feature. If you are unable to insert the
plug fully into the outlet, try reversing the
plug. If the plug should still fail to fit, contact
your electrician to replace your obsolete
outlet. Do not defeat the safety purpose of
the polarized plug.
13. Power-Cord Protection. Power-supply
cords should be routed so that they are not
likely to be walked on or pinched by items
placed upon or against them, paying
particular attention to cords at plugs,
convenience receptacles, and the point
where they exit from the product.
14. Nonuse Periods. The power cord of the
product should be unplugged from the outlet
when left unused for long periods of time.
15. Outdoor Antenna Grounding. If an outside
antenna or cable system is connected to the
product, be sure the antenna or cable
system is grounded so as to provide some
protection against voltage surges and builtup static charges. Article 810 of the National
Electrical Code, ANSI/NFPA 70, provides
information with regard to proper grounding
of the mast and supporting structure,
grounding of the lead-in wire to an antenna
discharge unit, size of grounding conductors,
location of antenna-discharge unit,
connection to grounding electrodes, and
requirements for the grounding electrode.
See Figure A.
16. Lightning. For added protection for this
product during a lightning storm, or when
it is left unattended and unused for long
periods of time, unplug it from the wall outlet
and disconnect the antenna or cable system.
This will prevent damage to the product due
to lightning and power-line surges.
17. Power Lines. An outside antenna system
should not be located in the vicinity of
overhead power lines or other electric light
or power circuits, or where it can fall into
such power lines or circuits. When installing
an outside antenna system, extreme care
should be taken to keep from touching such
power lines or circuits, as contact with them
might be fatal.
18. Overloading. Do not overload wall
outlets, extension cords, or integral
convenience receptacles, as this can
result in a risk of fire or electric shock.
19. Object and Liquid Entry. Never push
objects of any kind into this product through
openings, as they may touch dangerous
voltage points or short-out parts that could
result in a fire or electric shock. Never spill
liquid of any kind on the product.
20. Servicing. Do not attempt to service this
product yourself, as opening or removing
covers may expose you to dangerous
voltage or other hazards. Refer all servicing
to qualified service personnel.
21. Damage Requiring Service. Unplug this
product from the wall outlet and refer servicing to qualified service personnel under
the following conditions:
a. The power-supply cord or the plug has
been damaged; or
b. Objects have fallen onto, or liquid has
been spilled into, the product; or
c. The product has been exposed to rain or
water; or
d. The product does not operate normally
when following the operating instructions.
Adjust only those controls that are covered
by the operating instructions, as an improper
adjustment of other controls may result in
damage and will often require extensive
work by a qualified technician to restore the
product to its normal operation; or
e. The product has been dropped or
damaged in any way; or
f. The product exhibits a distinct change
in performance – this indicates a need for
service.
22. Replacement Parts. When replacement
parts are required, be sure the service
technician has used replacement parts
specified by the manufacturer or that have
the same characteristics as the original part.
Unauthorized substitutions may result in fire,
electric shock or other hazards.
23. Safety Check. Upon completion of any
service or repairs to this product, ask the
service technician to perform safety checks
to determine that the product is in proper
operating condition.
24. Wall or Ceiling Mounting. The product
should be mounted to a wall or ceiling only
as recommended by the manufacturer.
25. Heat. The product should be situated
away from heat sources such as radiators,
heat registers, stoves, or other products
(including amplifiers) that produce heat.
Figure A.
Example of Antenna
Grounding as per National
Electrical Code, ANSI/NFPA 70
Antenna Lead-In Wire
Ground Clamp
Antenna Discharge Unit (NEC Section 810-20)
Grounding Conductors (NEC Section 810-21)
Electric Service Equipment
Ground Clamps
Power Service Grounding Electrode System
(NEC Art 250, Part H)
Part No. JBLULB 10/99
SPEAKER PLACEMENT
• As a general rule, bass
response increases as a
subwoofer is placed closer
to a wall. Therefore, bass
output is maximized when
the subwoofer is placed in
a corner.
• It is also recommended that
the subwoofer be
positioned along the
same wall as the front
loudspeakers.
Low-frequency sounds are
normally omnidirectional,
meaning the listener can’t tell
where they are generated
from. However, frequencies
between 75Hz – 150Hz can be
localized, especially at higher
volume levels. Positioning
your subwoofer as recommended will provide the
most natural soundstage
and imaging from your
loudspeaker system.
Remember that these are just
guidelines. Since every
listening room is different,
JBL strongly recommends
experimenting with the
positioning of your subwoofer
to obtain the most pleasing
results in your room. One
technique that can help you
find the ideal subwoofer
location is to temporarily
place the subwoofer near the
main listening location. Then
move around the room and
determine where you hear
the most pleasing bass
performance. This would then
be the ideal location for the
subwoofer.
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 center
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:
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
post 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.
Left Front
+
Right Front
Center
–
+
back of your front left and
right speakers.
+
–
–
Subwoofer
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.
L
HIGH
LEVEL
IN
+
R
–
L
HIGH
LEVEL
OUT`
R
Receiver
Left Front
+
–
Left Surround
+
–
Left Surround
+
–
Center
+
Right Front
–
+
–
Right Surround
+
–
Right Surround
+
–
4
READ THIS!
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: To prevent electric shock,
do not remove the grounding plug
on the power cord, or use any plug
or extension cord that does not have
a grounding plug provided.
Make certain that the
AC outlet is properly grounded.
Do not use an adapter plug
with this product.
The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to
alert the user to the presence of uninsulated
“dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude to constitute a
risk of electric shock to persons.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.
1. Read Instructions. All the safety and
operating instructions should be read before
the product is operated.
2. Retain Instructions. The safety and
operating instructions should be retained
for future reference.
3. Heed Warnings. All warnings on the
product and in the operating instructions
should be adhered to.
4. Follow Instructions. All operating and use
instructions should be followed.
5. Cleaning. Unplug this product from the
wall outlet before cleaning. Do not use
liquid cleaners or aerosol cleaners. Use a
damp cloth for cleaning.
6. Attachments. Do not use attachments not
recommended by the product manufacturer,
as they may cause hazards.
7. Water and Moisture. Do not use this
product near water – for example, near a
bathtub, wash bowl, kitchen sink or laundry
tub; in a wet basement; or near a swimming
pool; and the like.
8. Accessories. Do not place this product on
an unstable cart, stand, tripod, bracket, or
table. The product may fall, causing serious
injury to a child or adult, and serious
damage to the product. Use only with a cart,
stand, tripod, bracket, or table recommended
by the manufacturer, or sold with the
product. Any mounting of the product should
follow the manufacturer’s instructions, and
should use a mounting accessory
recommended by the manufacturer.
9. A Product and Cart Combination Should
Be Moved with Care. Quick stops, excessive
force, and uneven surfaces may cause the
product and cart combination to overturn.
10. Ventilation. Slots and openings in the
cabinet are provided for ventilation and to
ensure reliable operation of the product and
to protect it from overheating, and these
openings must not be blocked or covered.
The openings should never be blocked by
placing the product on a bed, sofa, rug, or
other similar surface. This product should
not be placed in a built-in installation such
as a bookcase or rack unless proper
ventilation is provided or the manufacturer’s
instructions have been adhered to.
2
Important Safety Precautions!
11. Power Sources. This product should be
operated only from the type of power source
indicated on the marking label. If you are
not sure of the type of power supply to your
home, consult your product dealer or local
power company. For products intended to
operate from battery power, or other
sources, refer to the operating instructions.
12. Grounding or Polarization. This product
may be equipped with a polarized alternating-current line plug (a plug having one
blade wider than the other). This plug will fit
into the power outlet only one way. This is a
safety feature. If you are unable to insert the
plug fully into the outlet, try reversing the
plug. If the plug should still fail to fit, contact
your electrician to replace your obsolete
outlet. Do not defeat the safety purpose of
the polarized plug.
13. Power-Cord Protection. Power-supply
cords should be routed so that they are not
likely to be walked on or pinched by items
placed upon or against them, paying
particular attention to cords at plugs,
convenience receptacles, and the point
where they exit from the product.
14. Nonuse Periods. The power cord of the
product should be unplugged from the outlet
when left unused for long periods of time.
15. Outdoor Antenna Grounding. If an outside
antenna or cable system is connected to the
product, be sure the antenna or cable
system is grounded so as to provide some
protection against voltage surges and builtup static charges. Article 810 of the National
Electrical Code, ANSI/NFPA 70, provides
information with regard to proper grounding
of the mast and supporting structure,
grounding of the lead-in wire to an antenna
discharge unit, size of grounding conductors,
location of antenna-discharge unit,
connection to grounding electrodes, and
requirements for the grounding electrode.
See Figure A.
16. Lightning. For added protection for this
product during a lightning storm, or when
it is left unattended and unused for long
periods of time, unplug it from the wall outlet
and disconnect the antenna or cable system.
This will prevent damage to the product due
to lightning and power-line surges.
17. Power Lines. An outside antenna system
should not be located in the vicinity of
overhead power lines or other electric light
or power circuits, or where it can fall into
such power lines or circuits. When installing
an outside antenna system, extreme care
should be taken to keep from touching such
power lines or circuits, as contact with them
might be fatal.
18. Overloading. Do not overload wall
outlets, extension cords, or integral
convenience receptacles, as this can
result in a risk of fire or electric shock.
19. Object and Liquid Entry. Never push
objects of any kind into this product through
openings, as they may touch dangerous
voltage points or short-out parts that could
result in a fire or electric shock. Never spill
liquid of any kind on the product.
20. Servicing. Do not attempt to service this
product yourself, as opening or removing
covers may expose you to dangerous
voltage or other hazards. Refer all servicing
to qualified service personnel.
21. Damage Requiring Service. Unplug this
product from the wall outlet and refer servicing to qualified service personnel under
the following conditions:
a. The power-supply cord or the plug has
been damaged; or
b. Objects have fallen onto, or liquid has
been spilled into, the product; or
c. The product has been exposed to rain or
water; or
d. The product does not operate normally
when following the operating instructions.
Adjust only those controls that are covered
by the operating instructions, as an improper
adjustment of other controls may result in
damage and will often require extensive
work by a qualified technician to restore the
product to its normal operation; or
e. The product has been dropped or
damaged in any way; or
f. The product exhibits a distinct change
in performance – this indicates a need for
service.
22. Replacement Parts. When replacement
parts are required, be sure the service
technician has used replacement parts
specified by the manufacturer or that have
the same characteristics as the original part.
Unauthorized substitutions may result in fire,
electric shock or other hazards.
23. Safety Check. Upon completion of any
service or repairs to this product, ask the
service technician to perform safety checks
to determine that the product is in proper
operating condition.
24. Wall or Ceiling Mounting. The product
should be mounted to a wall or ceiling only
as recommended by the manufacturer.
25. Heat. The product should be situated
away from heat sources such as radiators,
heat registers, stoves, or other products
(including amplifiers) that produce heat.
Figure A.
Example of Antenna
Grounding as per National
Electrical Code, ANSI/NFPA 70
Antenna Lead-In Wire
Ground Clamp
Antenna Discharge Unit (NEC Section 810-20)
Grounding Conductors (NEC Section 810-21)
Electric Service Equipment
Ground Clamps
Power Service Grounding Electrode System
(NEC Art 250, Part H)
Part No. JBLULB 10/99
SPEAKER PLACEMENT
• As a general rule, bass
response increases as a
subwoofer is placed closer
to a wall. Therefore, bass
output is maximized when
the subwoofer is placed in
a corner.
• It is also recommended that
the subwoofer be
positioned along the
same wall as the front
loudspeakers.
Low-frequency sounds are
normally omnidirectional,
meaning the listener can’t tell
where they are generated
from. However, frequencies
between 75Hz – 150Hz can be
localized, especially at higher
volume levels. Positioning
your subwoofer as recommended will provide the
most natural soundstage
and imaging from your
loudspeaker system.
Remember that these are just
guidelines. Since every
listening room is different,
JBL strongly recommends
experimenting with the
positioning of your subwoofer
to obtain the most pleasing
results in your room. One
technique that can help you
find the ideal subwoofer
location is to temporarily
place the subwoofer near the
main listening location. Then
move around the room and
determine where you hear
the most pleasing bass
performance. This would then
be the ideal location for the
subwoofer.
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 center
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:
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
post 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.
Left Front
+
Right Front
Center
–
+
back of your front left and
right speakers.
+
–
–
Subwoofer
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.
L
HIGH
LEVEL
IN
+
R
–
L
HIGH
LEVEL
OUT`
R
Receiver
Left Front
+
–
Left Surround
+
Right Front
–
+
–
Right Surround
–
Left Surround
+
Center
+
+
–
Right Surround
–
+
5
–
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
line-level inputs on the
subwoofer. IMPORTANT:
Make sure that the LFE toggle
switch on the subwoofer is in
the “Normal” position. Do not
Dolby Digital or DTS (or Other Digital Surround Mode) Connection
use the “LFE” position with
Dolby Pro Logic-only
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.
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.
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,
Connect each speaker to the
corresponding speaker
terminals on your receiver or
amplifier.
LEVEL
Make sure that you have
configured your surroundsound processor for
“Subwoofer On” or “LFE On.”
The front left, front right,
LEVEL
LFE
PHASE
NORMAL
0º
LFE
PHASE
180º
NORMAL
0º
180º
CROSSOVER
FREQUENCY
150Hz
50Hz
R
L
Subwoofer
Output/LFE
R
LINE LEVEL IN
150Hz
50Hz
RECEIVER/PREAMPLIFIER
Subwoofer
Out
L
R
LINE LEVEL IN
For LFE use L or R
+
Max
Min
CROSSOVER
FREQUENCY
L
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.
Connect each speaker to the
corresponding speaker
terminals on your receiver or
amplifier.
Max
Min
RECEIVER
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.
–
For LFE use L or R
L
L
HIGH
LEVEL
IN
HIGH
LEVEL
IN
R
R
+
–
L
L
HIGH
LEVEL
OUT
HIGH
LEVEL
OUT
R
R
6
5
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
line-level inputs on the
subwoofer. IMPORTANT:
Make sure that the LFE toggle
switch on the subwoofer is in
the “Normal” position. Do not
Dolby Digital or DTS (or Other Digital Surround Mode) Connection
use the “LFE” position with
Dolby Pro Logic-only
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.
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.
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,
LEVEL
Make sure that you have
configured your surroundsound processor for
“Subwoofer On” or “LFE On.”
The front left, front right,
LEVEL
LFE
PHASE
NORMAL
0º
LFE
PHASE
180º
150Hz
Subwoofer
Out
R
L
R
LINE LEVEL IN
0º
180º
150Hz
50Hz
RECEIVER/PREAMPLIFIER
Subwoofer
Output/LFE
L
R
LINE LEVEL IN
For LFE use L or R
4
NORMAL
CROSSOVER
FREQUENCY
50Hz
+
Max
Min
CROSSOVER
FREQUENCY
L
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.
Connect each speaker to the
corresponding speaker
terminals on your receiver or
amplifier.
Max
Min
RECEIVER
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.
–
For LFE use L or R
L
L
HIGH
LEVEL
IN
HIGH
LEVEL
IN
R
R
+
–
L
L
HIGH
LEVEL
OUT
HIGH
LEVEL
OUT
R
R
7
Phase Control
O P E R AT I O N
Power
When the unit is plugged in
and (for the PB12 only) 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
when the subwoofer is not
receiving a signal. Of course,
the PB12 subwoofer can be
turned off, whenever desired.
The PB10 must be unplugged
if you do not wish to leave it in
auto (standby) mode.
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
Level Control
The subwoofer Level Control
adjusts the volume of the
subwoofer relative to the rest
of the system. Proper level
adjustment 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.
If you used the high-level
(speaker) inputs and there
is no sound from any of the
speakers:
LEVEL
• 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
speakers. Make sure all wires
are connected. Make sure
none of the speaker wires are
frayed, cut or punctured.
• Review proper operation
of your receiver/amplifier.
LEVEL
Max
Min
LFE
PHASE
Max
Min
NORMAL
0º
LFE
PHASE
180º
CROSSOVER
FREQUENCY
NORMAL
0º
180º
CROSSOVER
FREQUENCY
150Hz
50Hz
150Hz
50Hz
PowerBass PB10
PowerBass PB12
L
L
R
LINE LEVEL IN
R
LINE LEVEL IN
For LFE use L or R
For LFE use L or R
L
L
HIGH
LEVEL
IN
HIGH
LEVEL
IN
R
+ –
R
+ –
L
L
HIGH
LEVEL
OUT
HIGH
LEVEL
OUT
R
R
120V
60Hz, 160W
ON
OFF
120V
60Hz, 160W
POWER
PowerBass PB10
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
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.
bass output at the listening
position.
If there is low (or no) bass
output:
• Make sure the connections
to the left and right “Speaker
Inputs” have the correct
polarity (+ and –).
• Make sure that the
subwoofer is plugged into an
active electrical outlet and
(PB12 only) switched on.
• Adjust the crossover point.
• 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.
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.
PowerBass PB12
CAUTION
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RISK OF ELECTRIC SHOCK
DO NOT OPEN
8
7
Phase Control
O P E R AT I O N
Power
When the unit is plugged in
and (for the PB12 only) 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
when the subwoofer is not
receiving a signal. Of course,
the PB12 subwoofer can be
turned off, whenever desired.
The PB10 must be unplugged
if you do not wish to leave it in
auto (standby) mode.
Level Control
The subwoofer Level Control
adjusts the volume of the
subwoofer relative to the rest
of the system. Proper level
adjustment 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.
If you used the high-level
(speaker) inputs and there
is no sound from any of the
speakers:
LEVEL
LEVEL
Max
Min
LFE
PHASE
LFE
PHASE
180º
CROSSOVER
FREQUENCY
NORMAL
0º
180º
CROSSOVER
FREQUENCY
150Hz
50Hz
150Hz
50Hz
PowerBass PB10
PowerBass PB12
L
L
R
LINE LEVEL IN
R
LINE LEVEL IN
For LFE use L or R
For LFE use L or R
L
L
HIGH
LEVEL
IN
HIGH
LEVEL
IN
R
+ –
R
+ –
L
L
HIGH
LEVEL
OUT
HIGH
LEVEL
OUT
R
R
120V
60Hz, 160W
ON
OFF
120V
60Hz, 160W
POWER
PowerBass PB10
6
Max
Min
NORMAL
0º
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
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.
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
PowerBass PB12
CAUTION
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RISK OF ELECTRIC SHOCK
DO NOT OPEN
• 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
speakers. Make sure all wires
are connected. Make sure
none of the speaker wires are
frayed, cut or punctured.
• Review proper operation
of your receiver/amplifier.
If there is low (or no) bass
output:
• Make sure the connections
to the left and right “Speaker
Inputs” have the correct
polarity (+ and –).
• Make sure that the
subwoofer is plugged into an
active electrical outlet and
(PB12 only) switched on.
• Adjust the crossover point.
• 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.
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.
9
7
Electrical Parts List - PB12
PB12 POWERAMP PCB Version 6.3.
Part#
Designator
Description
50100
BR RECT
RS604
6AMP
Bridge rectifier
50105
D1
1N4744A
15V
1w Zener
50112
D10
1N5242B
12V
.5w Zener
50104
D11
1N4148
50112
D12
1N5242B
50104
D13
1N4148
Sig Diode
50104
D14
1N4148
Sig Diode
50105
D2
1N4744A
15V
1w Zener
50114
D3
1N5265B
62V
.5w Zener
50104
D4
1N4148
50113
D5
1N4735A
6.2V
1W
50103
D6
1N5234B
6V
.5w Zener
50104
D7
1N4148
50104
D8
1N4148
60157
Q1
2N5457
25V
N-chnl FET
60155
Q10
2N5401
120V
PNP 600mA
60155
Q11
2N5401
120V
PNP 600mA
60156
Q12
2N4401
40V
NPN 600mA
60102
U1
TLO64
30710
C1
2200uF
100V
30718
C10
4u7F
100V
30523
C11
330nF
100V
30710
C2
2200uF
100V
30532
C20
220nF
250V
metallized polyester
30502
C21
100nF
50V
mono ceramic
30502
C22
100nF
50V
mono ceramic
30527
C24
330nF
50V
mono ceramic
C25
NOT USED
30508
C26
10nF
50V
mono ceramic
30513
C27
3n3F
50V
mono ceramic
30502
C3
100nF
50V
mono ceramic
Sig Diode
12V
.5w Zener
Sig Diode
Sig Diode
Sig Diode
Quad OpAmp
Capacitors
+80 / -20
Electrolytic 105C
BP/NP Electr DF<.1
mono ceramic
+80 / -20
Electrolytic 105C
30711
C32
22uF
35V
+80/-20
Electrolytic
30715
C40
10uF
16V
+80/-20
Electrolytic
30716
C41
1uF
16V
+80/-20
Electrolytic
30717
C42
100uF
16V
+80/-20
Electrolytic
30502
C6
100nF
50V
mono ceramic
30521
C7A
100nF
250V
ceramic/film
30521
C7B
100nF
250V
ceramic/film
CW
NOT USED
CZ
100nF
100V
ceramic/film
30505
10
Part#
Designator
Description
Resistors
R100
NOT USED
40105
R10A
0.1R
.5W
metal
40105
R10B
0.1R
.5W
metal
40105
R10C
0.1R
.5W
metal
40420
R11
1k
.25W
carbon
40420
R12
1k
.25W
carbon
40417
R13
47k
.25W
carbon
40718
R14
3k3
.25W
carbon
R15
NOT USED
40735
R1A
7k5
2W
metal
40735
R1B
7k5
2W
metal
40735
R1C
7k5
2W
metal
40405
R21
4K7
.25W
carbon
40736
R22
42K2
.25W
metal
40737
R23
187k
.25W
metal
R24
NOT USED
R25
NOT USED
40722
R26
6k8
.25W
carbon
40738
R27
10k
2W
metal
40739
R28
1k2
0.25W
carbon
40739
R29
1k2
0.25W
carbon
40735
R2A
7k5
2W
metal
40735
R2B
7k5
2W
metal
40735
R2C
7k5
2W
metal
40703
R3
8M2
.25W
carbon
40738
R30
10k
2W
metal
40417
R31
47k
.25W
carbon
40417
R32
47k
.25W
carbon
40427
R33
23k7
.25W
metal
40403
R34
10k
.25W
metal
40740
R4
33k
1W
metal
40420
R40
1k
.25W
carbon
40701
R41
1000k
.25W
carbon
40741
R42
22k
.5W
metal
40701
R43
1000k
.25W
carbon
40406
R44
100k
.25W
carbon
40415
R45
470K
.25W
carbon
40701
R46
1000k
.25W
carbon
40409
R47
10k
.25W
carbon
40409
R48
10k
.25W
carbon
40726
R49
15k
.25W
carbon
40732
R5
56k2
.25W
metal
40727
R50
2k2
.25W
carbon
40111
R6
47R
.25W
carbon
40738
R7A
10k
2W
metal
11
Part#
Designator
Description
40738
R7B
10k
2W
metal
40738
R7C
10k
2W
metal
40738
R8A
10k
2W
metal
40738
R8B
10k
2W
metal
R9
NOT USED
Miscellaneous
80121
L1
220uH
5 Amp
Gapped Ecore choke
80122
L2
8u5H
5 Amp
ferrite bead
80122
L3
8u5H
5 Amp
ferrite bead
80122
L4
8u5H
5 Amp
ferrite bead
80100
CMC
2m2H
5 Amp
choke
60302
MODULE
S64AMI
108326
Led Harness
With two LED's,Molex
Glued
plug
into cabinet
80116
Transformer
MCI4632
70151
Switch
SW SPST
70322
LED socket
PCB mount LED socket
80117
3AG FUSE
2A SloBlo T type
70324
0.187" PCB Tabs
7
70323
PCB Fuse Holders
2
70325
PB12 faceplate
PB12 faceplate
80105
Power cord
Power cord
70305
Strain relief
Strain relief
100VA
4632 transformer
Power Switch
PB12 PREAMP PCB Version #6.3
Part#
Designator
Description
60102
U1
TLO 64
OP amp
60100
U2
LM324
OP amp
Capacitors
Film Caps may be used in any position EXCEPT C1,C2
30707
C1
200uF
50V
BP Electrolytic
30504
C10
100nF
50V
mono ceramic
30504
C11
100nF
50V
mono ceramic
30504
C12
100nF
50V
mono ceramic
30504
C13
100nF
50V
mono ceramic
30530
C16
100nF
50V
mono ceramic
30531
C17
150nF
50V
mono ceramic
30100
C18
330pF
50V
mono ceramic
30100
C19
330pF
50V
mono ceramic
30707
C2
200uF
50V
BP Electrolytic
30502
C20
100nF
50V
mono ceramic
Semiconductors
12
Part#
Designator
Description
30502
C21
100nF
50V
mono ceramic
30502
C22
100nF
50V
mono ceramic
30502
C23
100nF
50V
mono ceramic
30101
C3
220pF
50V
mono ceramic
C30
NOT USED
30101
C4
220pF
50V
mono ceramic
30101
C5
220pF
50V
mono ceramic
30101
C6
220p
50V
mono ceramic
C7
0r
C8
0r
C9
1k
.25W
Metal Resistor
40405
R1
4k7
.25W
carbon
40409
R10
10k
.25W
carbon
40731
R11
59k
.25W
carbon
40504
R12
45k3
.25W
metal
40412
R13
33k2
.25W
metal
40709
R14
68k1
.25W
metal
R15
NOT USED
R16
NOT USED
40730
Resistors
40732
R17
56k2
.25W
metal
40722
R18
6k8
.25W
carbon
40722
R19
6k8
.25W
carbon
40405
R2
4k7
.25W
carbon
40722
R20
6k8
.25W
carbon
R21
0r
R22
6k8
.25W
carbon
R23
0r
40722
40109
R24
604r
.25W
metal
40412
R25
33k2
.25W
metal
40405
R26
4k7
.25W
metal
40109
R27
604r
.25W
metal
40412
R28
33k2
.25W
metal
40406
R3
100k
.25W
carbon
40403
R30
10k
.25W
metal
40733
R33
12k1
.25W
metal
40734
R34
120k
.25W
metal
40451
R35
137k
.25W
metal
40406
R4
100k
.25W
carbon
40406
R5
100k
.25W
carbon
40406
R6
100k
.25W
carbon
40717
R8
2k7
.25W
carbon
40717
R9
2k7
.25W
carbon
13
Miscellaneous
108320
RCA CONNECTOR
108116
HI LEVEL I/O
Binding Post
OUT
DUAL RCA-yellow
Binding Post
108116
HI LEVEL I/O
Binding Post
IN
Binding Post
40402
LEVEL
5k POT
Log (A) Pot
40707
Crossover CONTROL
20k POT
Lin (B) Pot.
70150
LFE switch
SW SPDT
mini-Toggle
70150
Phase Switch
SW SPDT
mini-Toggle
14
PB12 MECHANICAL & PACKING PARTS LIST
Part#
Description
203500
12” Woofer
203410
Foot
203520
Outer Carton
203430
Owner’s manual 120V
203550
Amplifier complete
15
Vers63.gbl (Board layer 1) Scale=1.20
Wed May 17 08:26:14 2000
16
Vers63.gtl (Board layer 1) Scale=1.20
Wed May 17 08:36:44 2000
17
Vers63.gto (Board layer 1) Scale=1.36
Wed May 17 08:38:34 2000
18
1
2
4
3
R27
R11
604r
D
R In
C18
330pF
C19
330pF
6
5
GND
U1
3
2
1
LEVEL
2
1
7
U2
5
C7
Phase Switch
R13
1
U1
TLO64
R17
R15
NOT USED
137k
2
3
1k
0r
R35
33k2
C9
C8
0r
NOT USED
R24
RCA CONNECTOR
NOT USED
6
45k3
3
3rd Order Hi-Pass
D
R12
2
3
R25 33k2
68k1
SW SPDT
1
220p
7
5k POT
REMOTE Pot
C6
59k
R28 33k2
L In
R16
R14
DUAL RCA
56k2
604r
R10
B-POST HiLev I/O
10k
200uF
C
2nd Order LO-PASS
R1
C1
4k7
R
R
C3
2nd Order Hi-Pass
220pF
+15V
R6
10
R5
9
L
L
OUT
C2
4k7
C17
C4
100k
R8
2k7
150nF
C20
C21
220pF
C16
U2
100nF
13
1
R19
20k POT
5
6k8
4
+15V
C23
R34
220pF
2
LM324
100nF
C22
12
100nF
14
U1
6
LO PASS CONTROL 2
120k
100nF
C
3
-15V
3
C5
1
6k8
2
R9
2k7
IN
200uF
12k1
C10
20k POT
R18
-15V
R3
R2
R33
8
U1
R4
LO PASS CONTROL 1
C11
100nF
100nF
100nF
R20
7
C12
9
From PwrAmp
1
2
From PwrAmp
NOT USED
NOT USED
100nF
6k8
1
13
2
12
14
3
GAIN STAGE
R26
Un-designated Connector
4k7
To Pin 11 U1/U2
C30
NOT USED
LoPass Defeat Sw.
+15V
R30
1
2
3
4
5
6
10k
9
NOT USED
LED1
LO PASS CONTROL 4
1
2
SW SPDT
U2
R22
Led Harness
B
0r
R21
8
11
R23
0r
12
8
U2
10
-15V
10
C13
To Pin 14 U1/U2
mute
GND
GND
SIG
-15V
NOT USED
100nF
NOT USED
A
Title
A
B12 PREAMP (6.3 pcb)
Size
Number
Revision
Tabloid
Date:
File:
1
+15V
To/From PWRAMP
LED 2
NOT USED
2nd Order LO-PASS
NOT USED
B
LO PASS CONTROL 3
6k8
2
3
5
20-Apr-2000
Sheet1 of 1
T:\PB12 sch Folder\..\PB12 preamp Rev5.sch
Drawn By: MS/LL
4
1
2
3
4
5
6
7
8
10
9
LED1/2 Preamp
LED1/2 Preamp
R46
F
1000k
R45
SIGNAL LED & AUTO MUTE
470K
R100
NOT USED
To/From PREAMP
Un-designated Connector
E
+15V
mute
GND
GND
SIG
-15V
4 TLO64
3
U1
2
C40
6
C42
1k
1000k
1000k
100uF
D12
1N5242B
11
R42
R44
100k
22k
D13
2
1
1
2
MOLEX 2
1N4148
R47
10k
1N5242B
D10
R43
R41
On Harness
7
U1
TLO64
D11
1N4148
1uF
V+ LED
F
4
5
2k2
R40
10uF
-15
1N4148
D14
R50
1
11
To U1 Pin 11
+15
6
5
4
3
2
1
C41
Not Connected
R49
15k
Q1
MOLEX 2
R48
10k
On Harness
On Harness
2 Clr LED
2 Clr LED
C24
To U1 Pin 4
NOT USED
E
2N5457
330nF
R21
4K7
C25
R7A
NOT USED
R22
10k
R7B
10k
R7C
10k
42K2
R23
12
13
100nF
14
U1
11
1N5234B
1N4148
D7
6k8
R1A
7k5
R1B
7k5
R1C
7k5
R29
1k2
R31
47k
1N4148
R3
SP Neg
8u5H
1N4148
10k
C26
10nF
9
U1
SP Pos
8u5H
NOT USED
22uF
C21
100nF
C27
3n3F
D1
C22
100nF
NOT USED
FR
C
NOT USED
R5
56k2
GND
B
MODULE
R8A
10k
R2B
7k5
R2C
7k5
MCI4632
On Faceplate
CMC
V+
R2A
7k5
C7A
On Faceplate
AC Feed
C7B
2m2H
2A SloBlo
SW SPST
AC Return
100nF
RS604
R8B
10k
3AG FUSE
100nF
VBR RECT
Title
A
B12 PwrAmp (6.0 PCB)
C1
C2
2200uF
Size
2200uF
3
CW
-15V
1N4744A
A
8u5H
R15
I/P
D2
2
220uH
100nF
R9
B
1
L3
L1
S/D
10k
TLO64
11
CZ
100nF
330nF
VL2
C32
R34
D
R10C
0.1R
C11
C10
4u7F
1N4744A
23k7
R10B
0.1R
+15V
8
Q12
2N4401
R11
O/P
C3
4
2N5401
1k
8M2
47k
R33
R10A
0.1R
220nF
R32
10
3k3
L4
D4
R4
33k
R30
D8
R14
47k
V+
D3
UVLO
2N5401
C20
1N5265B
R28
1k2
NOT USED
Q10
R13
Q11
1k
+6V
R27
10k
NOT USED
R24
C
S64
R12
R26
NOT USED
R6
47R
D5
1N4735A
1
2
3
TLO64
R25
D6
CONNECTOR
AV SW
187k
4
D
SHORT CIRCUIT PROTECT
C6
4
Number
1
D
5
6
7
Date:
File:
8
Revision
5
20-Apr-2000
Sheet 1 of 1
T:\PB12 sch Folder\..\PB12 PwrAmp Rev5.sch
Drawn By: MA / LL
9
10