JBL P12SW, E250P User Manual

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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

TROUBLESHOOTING

If you used the high-level (speaker) inputs and there is no sound from any of the speakers:

•

Check that the receiver/

amplifier

is on and a source

is playing.

• Check that the powered subwoofer is plugged into an active electrical outlet and is switched on.

• Check all wires and connections between the receiver/ amplifier and the speakers. Make sure all wires are connected. Make sure none of the speaker wires are frayed, cut or punctured, or touching each other, except for the wires for the front left and right speakers, which may be joined with the wires for the subwoofer at the receiver/ amplifier end only, if you are using the speaker-level connections as described

on page 4.

• 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 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 the receiver/

amplifier

is on and a source is

playing.

• Check that the powered subwoofer is plugged into an active electrical outlet and is switched on.

• Check all wires and connections between the receiver/amplifier and the subwoofer. Make sure all wires are connected. Make sure none of the wires are frayed, cut or punctured, or touching each other.

• 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.

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.

E250P/P12SW subwoofers

E250P

Exploded View

15 7

10 17

Amplifier – Not for Sale

Ref# Part Number Description Qty

6 351348-001 PLATE,LED/LOGO-E250P 1 7 338125-002 ASY,LED-E250P/E250P 1 8 336486-001 ASY,FOOT,PLSTC- E250P 4

9 763-31110-40 SCREW, 8 X 2 1/2,TR,PH,PB,BLK ZINC,LCS (FOOT) 4 10 908302-012 SCREW, PB,HXS,#6x.75,ZINC (LOGO PLATE) 4 11 903802-016 SCREW, PB,HXS,#8x1",ZINC (WOOFER) 8 12 338128-002 13 336799-001 ASY, PORT TUBE 1 14 351307-001 GRILLE, BLK, FRNT 1 15 333249-003 CUP,GRILLE,TITANIUM, (BEECH MODEL) (CHERRY

333249-001 CUP,GRILLE (BLACK MODEL) 4 16 351243-001 RING,TRIM,12"-E250P 1 17 903401-012 SCREW, 6 X 3/4,PAN,PH,PB,BLK ZINC,LCS (AMPLIFIER) 10

ASY, WOOFER,12" DCR 4.8 Ω

MODEL)

P12SW

Exploded View

Amplifier – Not for Sale

Ref# Part Number Description Qty

1 352024-003 ASY, GRILLE, BLK, FRNT 1 2 333249-001 CUP,GRILLE 4 3 882-41110-12 SCREW, 6 X 3/4,PAN,PH,PB,BLK ZINC,LCS (AMPLIFIER) 10 4 903802-016 SCREW, PB,HXS,#8x1",ZINC (WOOFER) 8 5 351243-001 RING,TRIM,12" 1 6 338128-002 7 336799-001 ASY, PORT TUBE 1 8 336486-001 ASY,FOOT,PLSTC 4 9 883-31110-40 SCREW, 8 X 2 1/2,TR,PH,PB,BLK ZINC,LCS (FOOT) 4

10 361872-001 JBL LOGO 1

ASY, WOOFER,12" DCR 4.8 Ω

E250P/P12SW subwoofers

TEST SET-UP AND PROCEDURE

General Funct ion UUT = Unit Under Test

1) Connect a pair of level input c ables (RCA ) from signal generator to either Right or Left Level input on UUT. LEVEL control should be full counterclock wise (MIN). Make sure the LFE/Normal switch is i n the NO RMAL position.

2) Turn on generator, adjust to 100mV, 50Hz.

3) Plug in UUT; Turn Main Power switch ON. LED may be either Red or Green. Turn LEVEL control full clockwise (MAX). Low Pass control shoul d be set fully clockwise (150Hz).

4) LED should turn Gr een; imm ediately bass response shoul d be hear d and felt from port tube opening.

5) Turn off generator, turn LEVEL control fully counterclockwise (MIN), disconnect RCA cables.

6) Connect one pair of speaker cables to either high lev el input terminal on UUT. Cables should be connected to an integrated am plifier fed by the signal generat or .

7) Turn on generator and adjust so that speaker level output is 1.0V, 50Hz. Turn LEVEL contr ol full cloc k wise (MA X).

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 abov e, using a sweep generator as a signal source.

2) Sweep generator fr om 20Hz to 300Hz. Listen to the cabinet and driver s for any rattles, clicks, buzzes or any other noises. If any unusual noises are heard, remov e driver and test.

Driver Function

1) Remove driver fr om 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 terminal s. Cables should be connected to an integrat ed am plifier 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.

E250P/P12SW subwoofers

& P10SW

& P12SW

E250P subwoofer

Service Bulletin

Service bulletin # JBL2005-01 December 2005 Warranty labor rate: MINOR repair To: All JBL Service Centers Model: E150P, E250P Subwoofers Subject: “Chirp” Noise on Power-Up

In the event you receive an E150P or E250P with the complaint: “the subwoofer make a slight “chirp” noise when it becomes active from the stand-by mode”, perform the following modification.

Synopsis: Change C65 PE capacitor from 470µf to 47µf.

1) Remove the amplifer from the enclosure.

2) Remove the cover.

3) Change C65 Electrolytic capacitor from 470µf,16V to 47µf,16V, JBL part# 034-470515-200. Observe polarity.

4) Replace cover, replace amplifier in enclosure, test subwoofer.

JBL Incorporated 250 Crossways Park Dr. Woodbury, New York 11797 (516) 496-3400

E250P/P12SW subwoofers

TECH TIPS

Troubleshooting tips and solutions to common service problems

For models: E150P,E250P TIP# JBLTT2003-04 Rev2

P10SW, P12SW PB10,PB12 (Revision 2) *

Subject: Replacing MOSFETS Q18, Q22

In the event you need to replace MOSFET transistors Q18 or Q22 as part of a repair, it is important to use ONLY:

• JBL part# 051-640001-000

• Or JBL part# FE106401110

• Or only the brands: International Rectifier, or Fairchild.

Replace both Q18 and Q22 MOSFET’s in the circuit, even if only one seems to be damaged. Do NOT mix & match these components from different manufacturers, or batches. They should be identical.

* Late version PB10 or PB12 subwoofers (Revision 2 in the service manual) can be identified by:

• Amplifier serial number star ts with “HA”

• Output transistors in the open, on a large blac k heatsink

• Large plastic cup enclosi ng the rear of the amp assembl y

• Main PCB , bottom, solder-side contains all S M D devi c es

E250P/P12SW subwoofers

DETAILED TROUBLESHOOTING

A. Power Amp Section

Resistance

Check

Resistance from S+ (SPK O/P) to GND should be >1M Ω (NO LOAD)

Resistance from V+ (C6 P+) to V- (C8 P-) gradually Fully CHARGED should read >10k Ω Resistance from V+ (C6 P+) to S+ (SPK O/P) should read >1MΩ Resistance from V- (C8 P-) to S+ (SPK O/P) should read >1M Ω

2. Power Up LED RED

With a 5mV signal to Low level input, LED should change to GREEN

-Voltage measurements (DVM)

OP AMP

LED

P-U4(1) P-U4(7)

RED 0Vrms 11.84VDC

GREEN 7.13Vrms -12.93VDC

3. D.C. Operation

-Voltage measurements (DVM) on CLASS D POWER AMP

Between V+ Q4(E) Q1(C)

And This

Point

Get this

Reading

GND V- GND GND GND GND GND GND GND GND

71.7V 0V -71.7V 0V -71.7V -71.5V -71.2V 0V 0V 4.65V

Q10(C)

U7(1) U7(2) U7(4) U7(6) U7(7) U7(8)

4. Check Switching Frequency

• Oscilloscope - USE THE PROBE TIP TO U6(7) TO GND

• Reading 100kHz +/-10%,24Vp-p

B. Pre Amp Section

Line Level Input Sensitivity

-Set up Turn level, X’OVER FREQ POT Fully CW and LFE switch off

Generator Set at 200mV@50Hz

Signal to Line level input

E250P/P12SW subwoofers

DETAILED TROUBLESHOOTING (CONT'D)

- Voltage measurements

OP AMP

U2(1) U2(14) U2(8) U3(7) U3(1) U3(14) U3(8) U5(7) U5(1)

306.9mV 461mV 460mV 658mV 628mV 598mV 2.326V 2.02V 3.57V 23.33V

2. High Level Input Sensitivity

-Set up Turn level, X’OVER FREQ POT Fully CW and LFE switch off

Set Generator at 1.3V@50Hz

Signal to High level input

-Voltage measurements 15.3V at speaker output

3. Low-Pass

-Set up Set Generator at 200 mV@100Hz

Signal to

Measure voltage at S+ speaker output

-Voltage measurement

X’OVER FREQ. Setting Output

CW 14.03V

CCW 4.8V

Line level input

SPEAKER

O/P

4. LFE

-Set up Set Generator at 200mV@200Hz

Signal to

Measure voltage at S+ speaker output

LFE switch Setting Output

Normal 6V

LFE 18.32V

See flow chart next page for diagnostics.

Line level input

E250P/P12SW subwoofers

DETAILED TROUBLESHOOTING (CONT'D)

FLOW CHART

TO GROUND. ALL TEST INSTRUMENTS CONNECTED TO THE OUTPUT MUST

BE FLOATING. ATTACH THE SCOPE PROBE TIP TO S - and REFERENCE

LEAD TO S+.

(A 10mV signal may need from the input to trigger the Switch turn on)

START

Resistance check

(no load)

between V+ V-,

V+ O/P,V- O/P

and O/P to GND

is > 10K

yes

Power up with no

signal input

LED RED

CAUTION : SPEAKER OUTPUT IS FLOATING AND IS NOT PROTECTED AGAINST A SHORT

Check +/-15V-MOD

+/-15V voltage at

U 6(8),U6(4)

Check

FB1,FB2,C45,

Replace

Q18,Q22

I/P:10mv/50HZ

Check +15V/SW

Q4(E) TO V-

C50,C60,C63,

R81,R82

yes

Check Q4(E)

TO V-

= 0V D.C.

yes

Use scope to check

switching

frequency U6(7)

100KHz

+/-10% , ~24Vp-p

yes

CLASS D AMP OK

Discharge C37,

Check fuse

transformer, L4,

rectifier, C6 and C8

Check

MUTE(+8V) and

Q24,Q25,Q26

Check

U7(1) = -58.3V

Use scope to

check O/P U7(6)

and GND

143Vp-p square

wave shown

Check

L2,L3,C71,C72,

C73

C74

Check

MUTE(-12.9V),

And

Q24,Q25,Q26

Check

U7,Q16,Q17,

Q20,Q21,R87,

D26,D35,C64

E250P/P12SW subwoofers

E250P/P12SW (120v) Electrical Parts List

Part Number Description Reference Designator Qty

Resistors

020-220497-120 Carbon Film 2K2 1/4W J R11 1

021-100401-120 MOF Resistor

021-120403-020 MOF Resistor 1K2 3WS J 8x20 R9 1

021-120405-020 MOF Resistor 1K2 5WS J 8x25 R6 1

021-220202-120 MOF Resistor 22R 2W(S) J MB TYPE 15x8 R10 1

022-500003-020 KNP Resistor 0R05 3WS J FK TYPE R104 1

024-000098-120 SMD Resistor 0R 1/8W J 0805 R125,126 2

024-100298-120 SMD Resistor 10R 1/8W J 0805 R81,82 2

024-100398-120 SMD Resistor 100R 1/8W J 0805 R62 1

024-100498-120 SMD Resistor 1K 1/8W J 0805 R79,83,92,95,96,105,108,127,65 9

024-100598-120 SMD Resistor 10K 1/8W J 0805 R2,17,19,37,54,58,63,71, 8

024-100698-120 SMD Resistor 100K 1/8W J 0805 R3,112,22-25 6

024-110598-100 SMD Resistor 11K 1/8W F 0805 R98 1

024-120698-120 SMD Resistor 120K 1/8W J 0805 R39 1

024-121598-100 SMD Resistor 12K1 1/8W F 0805 R38 1

024-137698-100 SMD Resistor 137K 1/8W F 0805 R32 1

024-150498-120 SMD Resistor 1K5 1/8W J 0805 R67,68 2

024-180598-120 SMD Resistor 18K 1/8W J 0805 R29 1

024-187698-100 SMD Resistor 187K 1/8W F 0805 R45 1

024-200598-120 SMD Resistor 20K 1/8W J 0805 R94 1

024-220398-120 SMD Resistor 220R 1/8W J 0805 R90 1

024-220498-121 SMD Resistor 2K2 1/8W J 0805 R1,87,61 3

024-220598-120 SMD Resistor 22K 1/8W J 0805 R118 1

024-220798-120 SMD Resistor 2M2 1/8W J 0805 R80,121 2

024-237598-120 SMD Resistor 23K7 1/8W F 0805 R48 1

024-243698-100 SMD Resistor 243K 1/8W F 0805 R36 1

024-270498-120 SMD Resistor 2K7 1/8W J 0805 R73,64 2

024-300398-120 SMD Resistor 300R 1/8W J 0805 R55 1

024-300598-120 SMD Resistor 30K 1/8W J 0805 R56 1

024-330498-120 SMD Resistor 3K3 1/8W J 0805 R7,8,12-15,59 7

024-330598-120 SMD Resistor 33K 1/8W J 0805 R4,5 2

024-332498-100 SMD Resistor 3K32 1/8W F 0805 R26,27, 2

024-360498-120 SMD Resistor 3K6 1/8W J 0805 R28 1

024-390498-120 SMD Resistor 3K9 1/8W J 0805 R93 1

024-390598-120 SMD Resistor 39K 1/8W J 0805 R77 1

024-430498-100 SMD Resistor 4K3 1/8W F 0805 R78 1

024-453598-100 SMD Resistor 45K3 1/8W F 0805 R30 1

024-470298-120 SMD Resistor 47R 1/8W J 0805 R101,102 2

024-470398-120 SMD Resistor 470R 1/8W J 0805 R76,99,100 3

024-470498-120 SMD Resistor 4K7 1/8W J 0805 R85,86 2

024-470598-120 SMD Resistor 47K 1/8W J 0805 R44,47,49,107 4

1K 1W J

R103 1

E250P/P12SW subwoofers

Part Number Description Reference Designator Qty

024-470698-120 SMD Resistor 470K 1/8W J 0805 R70 1

024-470798-120 SMD Resistor 4M7 1/8W J 0805 R60 1

024-487498-100 SMD Resistor 4K87 1/8W F 0805 R51,53 2

024-510398-120 SMD Resistor 510R 1/8W J 0805 R57 1

024-560598-120 SMD Resistor 56K 1/8W J 0805 R122 1

024-620398-100 SMD Resistor 620R 1/8W F 0805 R16,18 2

024-680498-120 SMD Resistor 6K8 1/8W J 0805 R46,91,40,41,43,42 6

024-680598-120 SMD Resistor 68K 1/8W J 0805 R33,34,31,50,52,66 6

024-820598-120 SMD Resistor 82K 1/8W J 0805 R69 1

025-010300-000 Thermister TSE-103 K L:50mm 1

026-200595-269 Freq Pot 20K PN:RD163121R03D-20KBx2(EJ) VR2 1

026-500495-252 Level Pot 5K PN:RK163111R52B-5KA (EJ) VR1 1

Capacitors

031-100244-100 Ceramic Capacitor 0u01/50V K 0805 X7R C33,45,51,66,67,5,10 7

031-100343-100 SMD Capacitor 100pF/50V J 0805 NPO C36,58,16 3

031-100344-100 SMD Capacitor 0u1/50V K 0805 X7R C11,42-44,46-49,52,54,55,60,63,71,74,77 16

031-100384-100R SMD Capacitor 0u1/250V K 1206 X7R C3,7 2

031-220344-100 SMD Capacitor 220pF/50V J 0805 NPO C20,21,19,14,15 5

031-330444-300 SMD Capacitor 3300pF/50V K 0805 X7R C40,34 2

031-470244-102 SMD Capacitor 0u047/50V K 0805 X7R C62,59 2

031-560243-100 SMD Capacitor 56pF/50V J 0805 NPO C57,61 2

031-560343-102 SMD Capacitor 560pF/50V J 0805 NPO C56 1

032-100484-200 Mylar Capacitor 1uF/250V K P:15 C70,C70B 2

033-470444-270 NPE Capacitor 4u7/50V K10 (R)8x13 SBE C73 1

033-680464-270 NPE Capacitor 6u8/100V K10 (R)1020 GNE C72 1

034-100525-300 Electrolytic Capacitor 10uF/25V M (R)0511 P:5 C35 1

034-100625-300 Electrolytic Capacitor 100uF/25V M (R)6.3x11 P:5 C64 1

034-220525-301 Electrolytic Capacitor 22uF/25V M (R)5x11 P:5 C4,9,41,39,50,53 6

034-220615-301 Electrolytic Capacitor 220uF/16V M (R)0611 P:5 C37 1

034-330525-300 Electrolytic Capacitor 33uF/25V M (R)0511 P:5 C1 1

034-330615-300 Electrolytic Capacitor 330uF/16V M (R)0812 P:5 C12,78 2

034-330780-300 Electrolytic Capacitor 3300uF/80V M (R)22x48 C6,8 2

034-470415-301 Electrolytic Capacitor 4u7/50V M (R)0511 P:5 C2 1

034-470615-301 Electrolytic Capacitor 470uF/16V M (R)0812 P:5 C65 (See service bulletin) 1

038-100363-300 MPE Capacitor 0u1/100V J C68,69,26,27,28,29,30 7

038-150393-300 MPE Capacitor 0u15/63V J C25 1

038-330393-300 MPE Capacitor 0u33/63V J C31 1

039-100384-100 Safety Capacitor HQX0.1K275VACx2 18x6x12mm CXAC1 1

Semiconductors

051-000600-100 NPN Transistor PN:MPSW06RLRA TO-92 (ON) Q2,Q16 2

051-003100-000 NPN Transistor PN:TIP 31C TO-220 (MOSPEC) Q4 1

E250P/P12SW subwoofers

Part Number Description Reference Designator Qty

051-005600-100 PNP Transistor PN:MPSW56RLRA TO-92 (ON) Q3 1

051-222200-100 NPN Transistor PN:MPS2222ARLRA TO-92 Q21 1

051-290700-100 PNP Transistor PN:MPS2907A RLRA TO-92 Q19,23 2

051-540101-000 PNP Transistor PN:2N5401 TO-92 Q1 1

051-555100-000 NPN Transistor PN:2N5551 TO-92 Q17 1

051-640001-000 MOSFET N-Channel PN:IRF640N TO-220 (IR) Q18,22 2

052-400080-000 Bridge Regulator PN:RS804 400V,8A BR1 1

053-211100-000 IC;DIP,Driver PN:IR2111 Half-Bridge Driver U7 1

054-000100-100 SMD Diode PN:ES1D 200V 1A D5,26,29,33,38 5

054-001002-100 SMD Zener Diode PN:BZX84C10 10V SOT-23 D35 1

054-001501-100 SMD Zener Diode PN:BZX84C15 15V SOT-23 D6,7,9 3

054-007200-100 SMD IC; (Dual OP-Amp) PN:TL072CDR SO-8 (TI) U5,6 2

054-007400-100 SMD IC;(Quad OP-Amp) PN:TL074CDR (TI) U2,3 2

054-011400-100 SMD Transistor PN:DTC114TKA SMT3 Q7 1

054-033904-100 SMD Transistor PN:MMBT3904LT1 SOT23 Q11,14,13,5,8,9 6

054-033906-100 SMD Transistor PN:MMBT3906LT1 SOT23 Q6,10,12,15 4

054-045580-100 SMD IC; (Dual OP=Amp)PN:NJM4558M-TE3 DMP-8 U4 1

054-050601-100 SMD ZENER DIODE PN:BZX84C5V6 5.6V SOT-23 D24,36,37 3

054-414803-100 SMD DIODE PN:LL4148 (Wishay) D1-4,8,10-23,27,28, 21

054-540100-100 SMD Zener Diode PN:MMBT5401 LT1 SOT-23 Q20,24,26 3

054-555100-100 SMD Zener Diode PN:MMBT5551 LT1 Q25 1

050-505200-001 LED PN:LT-2402-21 D1B 1

Miscellaneous

065-050400-000 Sleeve φ3.5mm BLK F32 (125℃)

065-100200-000 UL Sleeve φ2.5 F32-2.5(blk) 125℃

082-022640-000 Wire Set #26 UL1007 L=400mm blk/wht 2P Hsing +5TT

091-000182-000 LED Holder PN:LED5-2A

044-100100-000 SMD Ferrite Bead PN:321611 600R/100MHz 1206

041-115001-000 Bead Coil YT-10911 L5 1

042-010053-003 Transformer YT-10615-4 PT1 1

043-300101-000 Inductor 30uH YT-10033 L2 1

043-324300-000 Inductor 324uH YT-10778 L4 1

043-560200-000 Inductor 56uH YT-10779 L1 1

043-700101-000 Toroidal Inductor 70uH YT-10682 L3 1

008-061215-000 Gasket C4305 12x15 t=5mm CR

008-062002-002 Gasket L-32 200x20mm t=5mm PORON

008-062002-012 Gasket (PB10/12) 200x20mm t=2mm CR4305

008-063208-000 Gasket C4305 321x8 t=1mm CR

008-069304-000 Gasket C4305 93x4 t=1mm CR

061-020000-000 Knob ABS φ20x15m/m UL94V-0 BLK

061-314002-000 Strain Relief P/N SB4F-2

061-400014-000 Rubber Foot ID:6.2 OD:11.5 t=2mm blk

061-700044-000 Mylar 13x18mm TO-220

E250P/P12SW subwoofers

Part Number Description Reference Designator Qty

063-010012-000 Brckt for pwr transistor P/N:TRK-1

063-321100-001 E250P Faceplate 322x105.7x15mm BLK (94V0)ABS E250P

063-321101-000ZR P12SW Faceplate 322x105.7x15mm BLK (94V0)ABS P12SW

063-531808-000 Bucket 322x105.7x146.5mm blk (94VO)

071-100608-100 Fiber Washer OD=8mm ID=3.2 t=1 (red)

071-100851-000 Washer ID=5.1 OD=12 t=1m/m

072-010007-000 RCA Jack SCJ-1020 2P(G) wht, red

072-040039-000 Terminal PC205 (t=0.8m/m) T205MA

072-040064-000 Terminal PC250(t=0.8),T250MA

072-040096-000 Terminal T187MA (t=0.8mm) PC187(0.8) AC1,AC3,T1,T2,AC2,SW2,SW4

072-040169-000 Connector 2 PIN JS-1001-2 P:2.5mm

072-060170-000 B.P. W / Accessory Parts

073-032315-601 Black Anodized 70x58x20mm

073-050001-000 Fuse Clip P/N:CFFH1206

074-020018-000 Rocker SW PN:RF1003-BB4-0

074-030002-000 Toggle SW PN:L101-T2B4QE SW5,SW6 2

074-300018-000 Relay PN:943-1C-48D K1 1

082-022241-001 Wire set #22 UL1007 L=410mm blk/wht

083-041802-009 Power Cable SPT-2 blk T187

093-105202-300 Fuse FUSE:2A,250V,5*20mm F1 1

181-911600-161 Wire #16AWG UL1007

181-911655-135 Wire #16AWG UL1007

181-921600-000 blk wire #16 UL1015 T187 L:140mm

181-921699-000 wht wire #16 UL1015 T187 L:160mm

blk L=610mm

green L=610mm

E250P/P12SW subwoofers

Semiconductor Pinout Diagrams

2N5401 Q1

3 Collector

Base

1 Emitter

MPSW06RLRA, MPSW56RLRAMPQ, MPS2222ARLRA, 2N2907A, 2N5551, Q2, 16, 3, 21, 19, 23, 17

3 Collector

Base

1 Emitter

OPAMP, QUAD TL074CDR U2, 3

BEVEL

OPAMP, DUAL TL072CDR SO-8, NJM4558M-TE3 U5, 6, 4

MOSFET IRF640 Q18, 22

1. G

2. D

3. S

TIP31C Q4

MMBT3904LTI SOT23, MMBT3906LTI SOT23, DTC114EK SMT3, MMBT5401 LTI, MMBT5551 LTI Q11, 14, 13, 5, 8, 9, 6, 10, 12, 15, 7, 20, 24, 26, 25

IR2111 HALF-BRIDGE DRIVER U7

E250P/P12SW subwoofers

P12SW Value of C65 = 47uf

See service bulletin for E250P

SCHEMATICS

NOTE: THIS VOLTAGE IS REFERENCED TO -V, NOT CIRCUIT GROUND

E250P/P12SW subwoofers

JBL P12SW, E250P User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual