JBL P12SW, E250P User Manual

Models:

™

Northridge

E-Series E250P

Performance Series P12SW

Powered Subwoofers

Service Manual

JBL Consumer Products 250 Crossways Park Dr.

Woodbury, New York 11797 Rev3 4/2006

E250P/P12SW subwoofers

- CONTENTS -

BASIC SPECIFICATIONS ……………. ……..…………..1

SAFETY INF ORMATION …………….……..….………..2

E250P PACKING……..………………….….….….……...3 P12SW PACKING……..……………………….…………4 DETAILED SPECIFICATIONS ……….……..…………..5 CONNECTIONS………………………...……..…...…..…6 OPERATION ……..………………….……...…….….…...9 BASIC TROUBLESHOOTING…………………………..10 E250P EXPLODED VIEW/PARTS LIST……………….11 P12SW EXPLODED VIEW/PARTS LIST……….……..12 TEST SET-UP AND PROCEDURE….…………………13 AMPLIFIER BLOCK DIAGRAM…………………………14 E250P BULLETIN JBL2005-01..……………..… ……..15 E250P/P12SW TECH TIP JBLTT2003-04 ..…….…...16 DETAILED TROUBLESHOOTING……………………..17 P.C.B. DRAWINGS……………………………………….20 ELECTRICAL PARTS LIST ..……….……….……….…24 IC/ T R ANS I STOR PI NOU TS..……..….…….….….….….28 SCHEMATICS……………………….……………………29

E250P, P12SW SPECIFICATIONS

Amplifier Power (RMS): 250 Watts Peak Dynamic Power *: E250P: 550 Watts P12SW: 500 Watts Driver: 12" (305mm) PolyPlas™ Inputs: Line Level (switchable to LFE) and Speaker Level

with 5-way binding posts Low-Pass Frequency: Variable from 50Hz to 150Hz Frequency Response: 25Hz – Low-pass crossover setting

Dimensions (H x W x D): 19-3/4" x 14-3/8" x 16-1/2"

(502mm x 365mm x 419mm) Weight: 43 lb/19.5kg

JBL continually striv es to update and improve existi ng pr oduc ts, as well as create new ones. The specifications and details in this and related JB L publications are therefore subject to c hange without notic e.

* The Peak Dynamic Power is measured by recording the highest center-to-peak voltage measured across the output of a resistive load equal to mi nimum impedance of the transducer, using a 50Hz sine wave burst, 3 cycles on, 17 cycles off.

E250P/P12SW subwoofers

SAFETY INFORMATION

Warning

Any person performing service of this unit will be exposed to hazardous voltages and the risk of electric shock. It is assumed that any person who removes the amplifier from this cabinet has been properly trained in protecting against avoidable injury and shock. Therefore, any service procedures are to be performed by qualified service personal ONLY!

Caution

Early revisions of the unit did not have a power switch. Hazardous voltages are resent within the unit whenever it is plugged in.

Before amplifier is plugged in, be sure its rated voltage corresponds to the voltage of the AC power source to be used. Incorrect voltage could cause damage to the amplifier when the AC power cord is plugged in. Do not exceed rated voltage by more than 10%: operation below 90% of rated voltage will cause poor performance or may shut the unit off.

List of Safety Components Requiring Exact Replacements

Part Number/ Designator

F1 093-105202-300

083-041802-009

PT1 042-010053-003

BR1 052-400080-000

Description

Line Fuse Slo Blo 2.0A 5x20mm

250V UL approved SPT-2 or better with polarized plug, UL approved wired with the hot side to fused side. Use with factory replacement panel strain relief (70305) only.

Power Transformer. Use only factory replacement.

Bridge diode. Use only factory replacement.

Leakage/Resistance Check

Before returning the unit to the customer, perform a leakage or resistance test as follows:

Leakage Current. Note there is no power switch on early revisions of this unit. When the power plug is plugged in, the unit is live. Connect the unit to its rated power source. Using an ammeter, measure the current between the neutral side of the AC supply and chassis ground of the unit under test. If leakage current exceeds 0.5mA, the unit is defective. Reverse the polarity of the AC supply and repeat.

Resistance. Measure the resistance from either side of the line cord to chassis ground, If it is less than 500k ohms, the unit is defective.

WARNING! DO NOT return the unit to the customer if it fails one of these tests until the problem is located and corrected.

Critical Components

All components identified with the IEC symbol in the parts list and schematic diagram designate components in which safety can be of special significance when

replacing identified with. Use only the replacement parts designated in the parts list or parts with the same rating of resistance, wattage or voltage.

3300uF 80V electrolytic filter caps. Be sure replacement part is at

least the same working C6,8 034-330780-300

063-531808-000

Inductor 043-560200-000

Inductor 043-300101-000

Inductor 043-700101-000

Inductor 043-324300-000

voltage and capacitance

rating. Also the lead

spacing is important.

Incorrect spacing may

cause premature failure

due to internal cabinet

pressure and vibration.

Rear Amp Cover

Use only factory

replacement

L1 - Use only factory

replacement

L2 - Use only factory

replacement

L3 - Use only factory

replacement

L4 - Use only factory

replacement

Ref# Part Number Description Qty

1 351249-002 MANUAL, OWNER-E250P/E250P 1 2 351249-001 CARTON,MASTER-E250P (BEECH MODEL) 1

351249-003 CARTON,MASTER-E250P (BLACK MODEL) 1

350884-003 CARTON,MASTER-E250P (CHERRY MODEL) 1 3 351252-001 PAD,END,TOP-E250P 1 4 351252-002 PAD,END,BOT-E250P 1 5 338381-001 WARRANTY CARD,1/5YR,JBL 1

14 352024-001 ASY, GRILLE, BLK, FRNT 1

E250P

Packaging

1 5

Ref# Part Number Description Qty

1 361803-001 P12SW Owner’s Manual 1 2 361813-001 P12SW Outer Carton 1 3 351252-001 Packing Foam (Top) 1 4 351252-002 Packing Foam (Bottom) 1 5 338381-001 Warranty Card 1 6 352024-003 Front Grille 1

P12SW

Packaging

1 5

E250P/P12SW subwoofers

JBL E250P/P12SW Powered Sub/ Plate Amp

LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes

Parameter Specification Unit Amp Section

Type (Class AB, D, other) D n/a Load Impedance (speaker) 5.6 Ohms Rated Output Power (120VA Rated Output Power (230VA

AVG RMS Dynamic Power 250 Watts THD @ Rated Power 0.3 % THD @ 1 Watt 0.1 % DC Offset 10 mV-DC

Damping factor >50 DF

Input Sensitivity

Input Frequency 50 Hz L&R 240 mVrms LFE input 240 mVrms Speaker/Hi Level Input 2.4 Vrms

Signal to Noise

SNR-A-Weighted 90 dBA SNR-unweighted 85 dBr SNR rel. 1W-unweighted 65 dBr

Residual Noise Floor 1 mVrms

Residual Noise Floor 1.5 mVrms(max)

US 120vac/60Hz Yes 108-132 120 Vrms Normal Operation

EU 230vac/50-60Hz Yes 207-264 230 Vrms Normal operation, MOMS required

QA Test

Limits Conditions Notes

n/a n/a

Nominal 150 Watts 150 Watts

140 Domestic version only 120 VAC-60 Hz 130 EU Version only 230 VAC-50 Hz

225

22k filter 145 Watts

0.5

22k filter

@ Speaker Outputs

Measured at amplifier board

Nominal Freq.

±2dB

To 150 Watts Single input driven

±2dB

To 150 Watts Single input driven, LFE switch ON

±2dB

To 150 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)

Average RMS power, 3/20 Cycles 50 Hz, Driven 6dB above its input sensitivity sensitivity

Measured at the speaker cable. 150 Watts @ THD < 0.1 % @ 50 Hz

Single input driven

Line level inputs must be terminated using 1KOHM

Input Impedance

Line Input (L, R,LFE) 10K ohms Speaker/Hi Level Input > 4.7K ohms

Filters

LP filter 4th order fixed 60-180 Hz Subsonic filter (HPF) 3rd Ord LFE Low pass 2nd order 200>LP<1K Hz

HP speaker out connector 200 Hz

Note: 120V Models do not have speaker output 100 Hz

Limiter

THD at Max. Output Power

Features -Volume pot Taper (lin/log) LOG -Phase switch 0-180 deg LP Filter defeat switch YES

Input Configuration

Line In (L,R) & LFE Spkr/Hi Level In YES --

Signal Sensing (ATO)

Auto-Turn-On (yes/no) YES ATO Input test frequency 50 Hz ATO Level LFE Input 4 mV ATO Level Speaker in 50 mV

ATO Turn-on time 5 ms

Auto Mute/ Turn-OFF Time 15 minutes

Fixed

n/a n/a functional

YES --

n/a

Nominal

n/a

Nominal

± 10 2nd order variable + 2nd order fix-24 db/Octave

LFE input driven only

Speaker input driven - Speaker out

± 10

loaded with 4 Ohms (Applies only to 230V Model)

Speaker input driven - Speaker out

± 10

loaded with 8 Ohms (Applies only to 230V Model)

Maximum Output Power Maximum THD as a result of limiting.

functional functional functional Disables LP filter, intended for LFE

functional Dual RCA jack

functional

functional functional functional functional

functional

Amp connected and AC on, then

input signal applied

T before muting, after signal is

removed

" " Maximum acceptable level. " Maximum acceptable level.

A Taper

Binding post connector L&R

Auto turn of time (T) must be 5 > T < 15 Minutes

Power on Delay time 3 sec.

Transients/Pops

ATO Transient 5 mV-peak

AC Power Applied

n/a

@ Speaker Outputs

E250P/P12SW subwoofers

Parameter Specification Unit

Turn-on Transient 50 mV-peak Turn-off Transient 50 mV-peak

Efficiency

Efficiency 65 %

Stand-by Input Power 24 Watts Power Cons. @ rated power 234 Watts

Protections

Short Circuit Protection YES

Thermal Protection YES

DC Offset Protection YES Line Fuse Rating

USA-Domestic 2 Amps

EU 1.25 Amps

4. ALL SPECS SHOULD BE MEASURED AT NOMINAL LINE VOLTAGE.

QA Test

Limits Conditions Notes

2v-pp 2v-pp

240

functional

1.25

@ Speaker Outputs AC Line cycled from OFF to ON

@ Speaker Outputs AC Line cycled from ON to OFF

Nominal Line voltage 120 VAC Maximum allowable input power under nominal

Input voltage and frequency, HOT or COLD @ nom. line voltage @ nom. line voltage 150 Watts @ 5.6 Ohms nominal line voltage

Direct short at output

@1/8 max unclipped Power at 1.06 times the input voltage

DC present at Speaker Out leads

Type-T or Slo Blo-250 V Internal fuse with UL/SEMKO rated holder Type-T or Slo Blo-250 V, Low Breaking capacity

operation.

Amplifier should resume operation after short

circuit condition removal

Temperature rise in accessible metal parts

should not exceed 35K rise for domestic version

or 30K rise for European versions (refer to

requirements sheet).

Design must insure no Offset at the speaker

output under any operating condition including

abnormal operation

Internal fuse with UL/SEMKO rated holder

SPEAKER CONNECTION

When we des igned the E150P, E 250P, P 10SW and P12SW po wered subwoofe rs, 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 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. Speakers and electronics terminals have corresponding positive (+) and negative (–) terminals. It is important to connect both speakers identically: positive (+) on the speaker to positive (+) on the amplifier and negative (–) on the speaker to negative (–) on the amplifier. Wiring “out of phase” results in thin sound, weak bass and a poor stereo image.

NOTE: The speaker-level connection method described on the next page is not a preferred connection and should only be resorted to if your receiver/processor does not have a line-level or subwoofer output. The customer is responsible for proper connections, and any damage to JBL or other equipment due to improper connections will not be covered by your JBL warranty. Consult with your JBL dealer or an audio installation expert if you have any questions about how to connect your subwoofer using the speaker-level inputs.

E250P/P12SW subwoofers

Analog Receiver/Processor – Speaker-Level Connections

Use this installation method only with an analog receiver/ processor that does not have digital processing or bass management, and also does not have a subwoofer output or a volume-controlled preamp (line-) level output:

Connect the speaker wires for both your main left and right speakers, and for the subwoofer, to the same speaker terminals on your receiver or amplifier. The wires may be joined by twisting together the bare ends of the two leads that will be connected to each terminal on the receiver/ amplifier, as shown in the diagram. This procedure should be done only four times (involving a total of eight barewire ends), and only for those wire ends that are being connected to the terminals on your receiver/amplifier. It is

important that you avoid joining any other wires. Do not

twist together wire ends that are being inserted into terminals on any speaker or on the subwoofer. Do not twist together wire ends that will be used for any speakers other than the front left and right speakers or the subwoofer. Refer to the connection diagram for guidance.

Twist together the (+) leads at one end of the speaker wires that you have designated for the left front speaker and for

the left high-level inputs on the subwoofer. Insert the joined (twisted) wires into the left front (+) terminal on your receiver/amplifier. Connect the free end of the (+) lead for the left front speaker to the (+) terminal on the back of the speaker. Connect the free end of the (+) lead for the left input on the subwoofer to the left binding-post terminal. Repeat this process for the (–) connections for the left front

Left Front

+ –

Left Front Center

+ – + –

Twist

Left Surround

+ –

Here

speaker and left input on the subwoofer, and then for the (+) and (–) connections for the right front speaker and right high-level inputs on the subwoofer.

Connect your receiver or amplifier’s center and surround speaker terminals to the corresponding terminals on the back of your center and surround speakers.

Center

+ –

Subwoofer

Receiver

HIGH

LEVEL

Twist

Here

Right Surround

Right SurroundLeft Surround

Right Front

+ –

Right Front

+ –

To (+) terminal on left speaker

To (+) terminal of left input on subwoofer

To front left (+) terminal on receiver/amplifier

Digital Receiver/Processor – LFE Connection

Use this installation method for Dolby Digital, DTS®or other digital surround processors that have bass-management programming, or for analog receivers/processors that have a filtered subwoofer output:

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 has only one subwoofer output jack, 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 surround sound processor for “Subwoofer On” or “LFE On.” The front, center and surround 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.

CROSSOVER FREQUENCY

LEVEL

LINE LEVEL IN

PHASE

Min

Max

L R

LFE NORMAL

HIGH

LEVEL

+ –

50Hz

0º 180º

150Hz

Subwoofer Output/LFE

RECEIVER/PREAMPLIFIER

For LFE use L or R

Analog Receiver/Processor – Line-Level Connections

Use this installation method with an analog receiver/ processor that does not have digital processing or bass management, and that is equipped with a full-range subwoofer output or a volumecontrolled preamp (line-) level output:

Use RCA-type interconnect cables to connect the linelevel 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 use the “LFE” position with Dolby* Pro Logic*-only processors.

Note: If your receiver or amplifier has only 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 so

that the sub-

woofer is “On.” Note for advanced

users: If your receiver/ processor has a built-in lowpass crossover filter for the subwoofer output, then the LFE switch should be set to the “LFE” position to bypass the subwoofer’s internal crossover.

CROSSOVER FREQUENCY

LEVEL

LINE LEVEL IN

PHASE

Min

Max

L R

LFE NORMAL

HIGH

LEVEL

+ –

50Hz

0º 180º

150Hz

Subwoofer

Out

RECEIVER

For LFE use L or R

L R

E250P/P12SW subwoofers

OPERATION

E250P/P12SW subwoofers

Power

When the unit is plugged in and the power switch is on and no signal is received, the LED on the top of the unit will turn red. When a signal is present, the LED will turn green.

* E250P: LED is on the amplifier faceplate

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

Crossover Adjustments

Note: It will take several minutes for the LED to turn from green to red after the input signal to the subwoofer is removed. Due to JBL’s unique high-output, amplifier design, power con-

size, subwoofer placement, type of main speakers and position. Adjust the subwoofer level so that the volume of the bass information is pleasing to you.

The Crossover Frequency Control determines the highest frequency at woofer reproduces your main speakers can comfortably reproduce some lowfrequency sounds, set this control to a lower frequency setting, between 50Hz and 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 and 150Hz. This control is not used when the LFE switch is in the “LFE” position.

high-efficiency

which the sub-

sumption is minimal when the subwoofer is not receiving a signal. Of course, the subwoofer can be turned off, whenever desired, if you do not wish to leave it in auto (standby) mode.

sounds. If

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