DOWNLOAD JBL P 4020 (serv.man3) Service Manual ↓ Size: 575.89 KB | Pages: 8 in PDF or view online for FREE

Model
P 4020 (serv.man3)
Pages
8
Size
575.89 KB
Type
PDF
Document
User Manual / Operation Manual
Brand
Device
Car Audio
File
p-4020-sm3.pdf
Date

JBL P 4020 (serv.man3) User Manual / Operation Manual ▷ View online

Power Series Amplifiers
P-4020, P-4040 Owner ’s Manual
G E N U I N E   J B L
2
Amplifier Features
• 4, 3 or 2 channel Operation (P-4040) 2 or
One channel Operation (P-4020)
• Simultaneous stereo and mono Operation
• Built-in 12dB/oct Electronic Crossover
• Balanced Differential Input 
• Pre-amp outputs (filtered on 4040)
• Oversized Floating Rail Mosfet Power
Supply
• Universal Interface
• Common Sense Turn-on
• Variable Input Sensitivity (250mV-4V)
• Fully Complementary, Direct Coupled
Discrete Power Amplifier Circuitry
• Gold-Plated Power, Input and Output
Connectors
• 2-Ohm Stable (stereo)
• JBL badge lights when amp is operating,
and flashes when protection circuit is
activated
• Made in USA
The JBL P-4020 is a 2-channel power
amplifier that offers stereo, bridged-mono, or
tri-mode operation, and is rated at 40 watts
(rms) per channel into a 4-ohm load. In a
bridged-mono configuration, it can deliver up
to 120 watts (rms) for the same load. The JBL
P-4040 is a 4-channel version with the same
power ratings. Both amplifiers also feature:
• 2-ohm operation, rated at 75 watts (rms) per
channel 
• A bridge/stereo switch for fast system setup 
• A built-in 80 Hz, 12 dB-per-octave electronic
crossover 
• Individually selectable high- and low-pass
filters (with through-pass) for amplifier and
auxiliary outputs
• An amplifier input sensitivity control to
match a wide range of input signal levels
from 250 mV to 9 V
• Universal Interface allows easy connection
of any radio.
• Common Sense Turn-On uses the amplifiers
speaker level inputs to turn on automatically
by sensing dc from the radio's BTL output,
thus freeing the remote terminal for use in
turning on other amplifiers in the system
• Five protection levels guard against over-
voltage, under-voltage, over-power, over-
temperature, and over-current situations
• 2-color LED array indicates green when
power is on and orange when protection is
activated 
• Industrial-grade, gold-plated, pre-wire and
plug-in connectors for an easy-to-install,
high-quality interface
• Transparent control cover to deter
tampering yet provide a clear view of
installation settings
• Built-in automotive type fuse to protect the
amplifier  
• Unibloc chassis provides improved heat-
sink capacity and exceptional RFI shielding
characteristics
About This Manual
To attain maximum amplifier performance,
we encourage you to read the remaining
pages before installing and operating your
new JBL Power Series Amplifier. Especially
review the Applications section for ideas on
designing and expanding your system. Also,
save these instructions for future reference.
IMPORTANT: Installation of automotive
stereo components can require extensive
experience in performing a variety of
electrical and mechanical procedures.
Although these instructions explain how to
install a JBL Power Series Amplifier in a
general sense, they do not show the exact
installation methods for your particular
vehicle. If you do not have the experience, do
not attempt the installation yourself; instead
ask your Authorized JBL Car Audio Dealer
about professional installation options.
About The Warranty
This JBL product is made with our ongoing
dedication to creating the best consumer
audio products possible. As a result, you can
expect your new JBL Power Electronics Series
Amplifier to provide you with many years of
listening enjoyment.
All JBL Automotive Products carry a limited
parts and labor warranty (see the enclosed
warranty card), so retain the bill of sale to
protect your purchase and to aid us with any
service-related questions you may have.
Installation Precautions and Notes
• The JBL P-4020 (or P-4040) has five levels of
circuit protection that monitor the amplifier
and will shut it down if the electrical system
voltage drops below 5 Vdc or exceeds 
18 Vdc, temperatures are above 194°F (90°C),
short circuits occur, or current draw exceeds
product specifications. For best performance,
check the intended mounting site to make
sure the operating environment does not
create conditions that will trigger circuit
protection.
• Prior to installation, turn off all audio systems
and other electrical devices. Also disconnect
the (–) negative lead from the vehicles
battery.
• At the installation site, locate and make a
note of all fuel lines, hydraulic brake lines,
and electrical wiring. Use extreme caution
when cutting or drilling in and around these
areas.
Thanks 
for purchasing your new JBL Power
Series Amplifier. Power Series amplifiers
feature the latest advances in discrete circuit
topology ensuring low distortion and
superbly clean and clear sound quality. In
addition to RCA type pre-amp inputs, Power
Series amplifiers feature Universal
Interface™, designed to facilitate integration
with factory installed audio systems for
distortion free performance that rivals
conventional pre-amp connections. Included
in the Universal Interface circuit is Common
Sense™ turn-on. Common Sense turn -on
senses the common-mode voltage present
on the speaker outputs of factory and
aftermarket radios, turning on the amplifier
without a separate remote wire. All Power
Series amplifiers feature built-in electronic
crossovers and pre-amp outputs for easy
system expansion without requiring
outboard processors. Housed within the
sleek, extruded aluminum frames, you'll find
the latest advances in circuit topology, along
with user conveniences like a wide-range
input sensitivity control, auxiliary outputs,
and a built-in electronic crossover. With
features like these and more, you can quickly
try out a variety of system ideas, and
because the P-4020 and P-4040 belong to a
related product family, you're assured future
expansion will look as good as it sounds.
3
• Check clearances on both sides of a
planned mounting surface before drilling
any holes or installing any screws.
Remember that mounting screws can
extend behind the mounting surface. 
• Always wear protective eyewear when
using tools. 
• When routing cables, keep input signal
cables away from power cables and
speaker wires. 
• When making connections, make sure that
each connection is clean, insulated, and
properly secured. Observe the polarity
markings on the rear panel. Refer to the
application drawings to set up the amplifier
for operation in stereo, bridged-mono, bi-
amp, or tri-mode configurations.
• If the amplifiers fuse must be replaced, use
only the same rating and type as a
replacement. Do not substitute another
kind.
Controls and Connectors
(figs. 1, 2, 3, 4, 5, 6,)
1. Pre-amp Level Input Connector – Connects
to line level output from the source unit. 
2. Universal Interface Speaker Level
Connector – Connects to speaker level
output from the source unit. Provides
Common Sense amplifier turn-on when
used with factory radios. (2-channel on 
P-4020, 4-channel on P-4040)
3. Pre-amp Level Output Connector –
connects to other amps or processors in
the signal chain (flat on P-4020, flat or
filtered on P-4040)
4. Speaker Output Connector – (2-channel on
P-4020, 4-channel on P4040)
5. Fuses – P-4020: 20A ATC type P-4040: 30A
ATC type.
6. Power Connector – Connections for 12V +,
Gnd and Rem.
7. Input Mode Switch – Sums left and right
inputs.
8. Input Sensitivity Control – Adjusts input
sensitivity for pre-amp level and speaker
level inputs.
9. Pre-amp Output Selector Switch – Selects
input path for pre-amp output. Output can
be summed from front and rear inputs
with no filter, or filtered by the front or rear
crossover.
10. Rear Channel Input Selector – Selects rear
channel input between front input and
rear input.
11. Crossover Selector – Determines whether
the crossover is a High Pass filter (HP), a
Low Pass filter (LP), or unfiltered (Flat).
LEVEL
INPUT MODE
MO ST
4V
.250V
XOVER
FLAT
HP
LP
2V
20
 
 
 
R
 
 
 
+
 
 
 
L
 
 
 
+
+BATT
REM
GND
BRIDGE 
SPEAKER OUTPUTS
POWER
FUSE
20A
MADE IN THE U.S.A.
R
L
LINE LEVEL
INPUT
SPEAKER LEVEL IN
R
+
L
+
AUX
OUT
R
L
+ R –
+ R –
– L +
– L +
AUX
OUT
R
L
R
L
FRONT
FRONT
REAR
LINE LEVEL
INPUT
SPKR LEVEL IN
REAR
ST MO
INPUT MODE
PRE OUT
LEVEL
INPUT MODE
MO ST
4V
.250V
FRONT 
F+R
FLAT
REAR
LP
FRT
LP
FRT
REAR
XOVER
FLAT HP LP
XOVER
FLAT
HP
LP
LEVEL
4V
.250V
2V
2V
REAR 
INPUT
F U S E
3 0 A
B R I D G E  
–       R       +
–       L       +
MADE IN THE U.S.A.
+BATT
REM
GND
BRIDGE 
SPEAKER OUTPUTS
POWER
FRONT
REAR
30
8
7
11
5
4
6
1
2
3
1
2
3
9
10
8
7
11
8
11
4
5
6
P-4020
P-4040
7
4
Mounting The Amplifier
The JBL P-4020 (or P-4040) can be mounted
in virtually any location inside the vehicle.
However, make sure to keep the amplifier
away from heater vents or ducts.
1. At the chosen site, use the amplifier as a
mounting template and mark locations of
the four mounting holes.
2. Drill a small pilot hole at each marked
location.
3. Mount the amplifier and securely tighten
the mounting screws.
Wiring The Power Connections
Refer to Figures 1-6 for connector locations. 
1. For power, remote, and speaker wires,
strip 1/4" off one end of each jacket to
reveal bare wire for insertion into the
barrier strip connectors.
2. Locate the 3-connection barrier strip
labeled +Batt, Rem and Gnd. Connect a
black wire (at least 2 mm
2
) to the Gnd
terminal and connect the other end to the
nearest bare-metal chassis component.
Then, connect a red wire (at least 2 mm
2
)
from the vehicles +12-volt battery terminal
to the +Batt terminal on the barrier strip.
Finally connect a blue wire (1,25 mm
2
) to
the Rem terminal on the barrier strip and
connect the other end to the Rem output
of the source unit. If you are using speaker
level inputs and speaker level outputs from
the source, disregard the previous
instruction regarding the Rem terminal.
Wiring the Speaker Output
Connections
1. Connect the speakers, observing proper
polarity, to the speaker output barrier strip
on the amplifier using at least 1,25 mm
2
high quality speaker wire. (Note: The total
impedance of the speakers connected to
the outputs when the amp is driven in
stereo must be at least 2 Ohms.) 
2. If you are bridging the amplifier, connect
the speaker wires to the terminals marked
bridge observing proper polarity. (Note:
The total impedance of the speaker system
to be connected to the amplifier must be at
least 4 Ohms in bridge mode)
3. If you are running the amp in Tri-Mode
(stereo and mono simultaneously to one
or two pairs of satellite speakers and a
subwoofer), refer to the chart to determine
the capacitor and inductor values youll
need to route bass signals to the woofer,
and midrange and high frequencies to the
satellite speakers. These passive crossover
components will also ensure that the
impedance of the speaker system doesn't
drop below 2 Ohms.
Wiring the Input Connections
1. If you are using conventional RCA input
connections and a source unit with output
voltage less than 4V, simply plug the RCA
plugs into the RCA jacks on the amplifier
2. If you are connecting the amplifier to a
factory installed source unit, or to a source
unit that only has speaker level outputs,
connect the speaker outputs of the source
to the speaker inputs on the amp
observing the following color-code: 
Front Left+: White
Front Left-: White with black stripe
Front Right+: Gray
Front Right-: Gray with black stripe
Rear Left+: Green
Rear Left-: Green with black stripe
Rear Right+: Purple
Rear Right-: Purple with black stripe
(Note: When using the Universal Interface
Speaker Level Inputs and speaker level
outputs, the rem terminal on the amplifier
may be used as a remote output
connection, and will provide power to turn
on other amplifiers and processors in the
system.)
3. If you are connecting your Power Series
amplifier to a source unit with output
voltage higher than 4V, connect the output
signal wires of the source unit to the
Universal Interface Speaker Inputs.
Because the inputs have an impedance of
10K Ohms, this connection will provide the
best noise-free performance posssible.
FREQUENCY
INDUCTOR
CAPACITOR
Crossover 
6dB/oct. LP
6dB/oct. HP
(4 ohm)
(4 ohm)
75Hz
8.0mH
530µF
100Hz
6.4mH
400µF
125Hz
5.0mH
318µF
150Hz
4.2mH
265µF
175Hz
3.6mH
227µF
200Hz
3.2mH
198µF
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JBL P 4020 (serv.man3) User Manual / Operation Manual ▷ Download

  • DOWNLOAD JBL P 4020 (serv.man3) Service Manual ↓ Size: 575.89 KB | Pages: 8 in PDF or view online for FREE
  • Here you can View online or download the User Manual / Operation Manual for the JBL P 4020 (serv.man3) in PDF for free, which will help you to disassemble, recover, fix and repair JBL P 4020 (serv.man3) Car Audio. Information contained in JBL P 4020 (serv.man3) User Manual / Operation Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.