JBL ES150P Service Manual

ES Series

ES150P

Powered Subwoofer

Service Manual

Released 2008 Discontinued XXXX

JBL Consumer Products 250 Crossways Park Dr.

Woodbury, New York 11797 Rev0 3/2008

ES150P

- CONTENTS -

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

DETAILED SPECIFICATIONS ……….……..…………..2

PACKING……..……………………………….….….….....4

CONTROLS/CONNECTIONS………………..…...…..…5 OPERATION ……..………………….……...…….….…...7

EXPLODED VIEW/PARTS LIST…….….….…………....8

TEST SET-UP AND PROCEDURE….….……………....9

AMPLIFIER BLOCK DIAGRAM…….………….……..…10

DETAILED TROUBLESHOOTING..……………… ……12

P.C . B. DRAWING S … .…………………………………….13

ELECTRICAL PARTS LIST ..……….……….……….…18 IC/ T R ANS I S T O R PIN O U T S ..……..….…….….….….….23 SCHEMATICS…………………………………………….24

ES150P SPECIFICATIONS

Amplifier Power (RMS): 300 Watts Peak Dynamic Power *: 500 Watts Driver: 10" (254mm) PolyPlas™ Inputs: Line Level (switchable to LFE) Low-Pass Frequency: Variable from 50Hz to 150Hz

(24dB/octave, continuously variable) Frequency Response: 27Hz – Low-pass crossover setting Dimensions (H x W x D): 18" x 13-1/4" x 15-1/4" (457mm x 337mm x 387mm) Weight: 39 lb/17.7kg

JBL continually strives to update and impr ove existing produc ts, as well as create new ones. The specifications and details in this and related JBL publications are therefor e subj ec t to change without notice.

* The Peak Dynamic Power is measured by recording the highest center-to-peak voltage measured across the output of a resistive load equal to

minimum impedance of the transducer, using a 50Hz sine wave burst, 3 cycles on, 17 cycles off.

ES150P

JBL ES150P 225W Powered Sub Amp

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

Parameter Specification Unit Amp Section

Type (Class AB, D, other) D n/a Min. Load Impedance (speaker) 4 Ohms

AVG System impedance 5.18 Ohms Rated Output Power 225 Watts

AVG RMS Dynamic Power 245 Watts THD @ Rated Power 0.5 % THD @ 1 Watt 0.2 % DC Offset 10 mV-DC

Damping factor >50 DF

Input Sensitivity

Input Frequency 50 Hz L or R Inputs 11 mVrms LFE mode using L or R inputs 11 mVrms System Gain 45 dB

US 120vac/60Hz Yes 108-132 120

EU 230vac/50-60Hz Yes 207-253 230

QA Test

Limits Conditions Notes

Reference

±1dB To 1 Watt Single input driven ±1dB To 1 Watt Single input driven, LFE switch ON

Reference Single input driven Normal or LFE mode

Vrms Normal Operation Vrms Normal operation, MOMS required

n/a n/a Nominal

AP Computed based on system impedance curve Over the BW of 20 to 500Hz

210

240

1 22k filter

0.3 22k filter 30 @ Speaker Outputs

20 Measured at amplifier board

50 Nominal Freq.

Average RMS power, 3/20 Cycles 50 Hz, Driven 6dB above its input sensitivity , average of the first 4 consecutive peaks

Measured at the speaker cable. 189 Watts @ THD < 0.1 % @ 50 Hz

Signal to Noise

SNR-A-Weighted 80 dBA SNR-unweighted 65 dBr

Residual Noise Floor <2.0 mVrms(max)

Input Impedance

Line Input (L, R,LFE) 10K ohms

Filters

LP filter Variable 50-150 Hz Subsonic filter (HPF) 2nd Order Fixed Friend circuit Fixed LFE Low pass 200>LP<500 Hz

Limiter

THD at Max. Output Power

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

LED indicator YES

Input Configuration

Line In (L,R) & LFE

13 % functional

YES --

75 relative to 1W A-Weighting filter 60 relative to 1W 22K filter

Volume @max, w/ A/P Swept Bandpass Measurement (Line

2.5

freq.+ harmonics) (BW=20 KHz)

n/a Nominal

± 10 4th Order variable-24 db/Octave

LFE input driven only

Drive unit 6dB above the required level to obtain full power Approximately 208mV Maximum THD as a result of limiting.

functional A Taper functional functional Disables LP filter, intended for LFE

functional

functional Dual RCA jack, for LFE use either L or R inputs

Line level inputs must be terminated using 1KOHM

Bicolor LED located in top of the cabinet, RED-Standby, GRN-Active

Signal Sensing (ATO)

Auto-Turn-On (yes/no) YES ATO Input test frequency 50 Hz ATO Level LFE Input 2 mV

ATO Turn-on time 5 ms

Auto Mute/ Turn-OFF Time 5-15 minutes

Power on Delay time 3 sec.

functional functional functional Maximum acceptable level.

functional

Amp connected and AC on, then input signal applied T before muting, after signal is

5-15

removed

4 After AC Power is applied

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

ES150P

Parameter Specification Unit

Transients/Pops

ATO Transient 0.5 V-peak Turn-on Transient 0.5 V-peak Turn-off Transient 0.5 V-peak

Efficiency

Efficiency 61 %

Efficiency at 1/8 of rated power 45 % Off state input power 12 Watts

Stand-by Input Power 18 Watts

Power Cons. @ rated power 367 Watts

Protections

Short Circuit Protection YES

Thermal Protection YES

DC Offset Protection YES Line Fuse Rating

USA-Domestic 3.15 Amps

EU 2 Amps

QA Test

Limits Conditions Notes

0.5V @ Speaker Output

0.8V @ Speaker Output AC Line cycled from OFF to ON

0.8V @ Speaker Output AC Line cycled from ON to OFF

Test conducted at rated power

250W Nominal Line voltage

42 Test conducted at 31.25 WRMS 14 Nominal Line voltage RED LED

18 @ nom. line voltage

375 @ nom. line voltage 225 Watts @ 4 Ohms nominal line voltage

functional Direct short at output

functional

@1/8 max unclipped Power at

1.06 times the input voltage

- DC present at Speaker Out leads

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

Breaking capacity Internal fuse with UL/SEMKO rated holder

mplifier activated by signal presence at the

Line input

Nominal Line voltage-Rated impedance 4 Ohms

Maximum allowable input power under nominal Input voltage and frequency, HOT or COLD operation. LED GREEN no signal applied

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

Other Parameters/Notes:

1. Limiter circuit response must be clean sounding with no apparent pops, noises, or pumping.

2. Plate dimensions not to exceed 11.81"H x 7.87"W and the plate must be airtight with no possibility of air leaks (plastic cover required).

3. Volume control should be at the input buffer stage in order to lessen the possibility of clipping the input section with highly dynamic audio material.

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

ES150P

AC 120V~60Hz

ES150P

CONTROLS AND CONNECTIONS

Rear Panel

Phase Switch

™

LFE/Normal Selector

Subwoofer-Level Control

Crossover Adjustment

∞

Line-Level/LFE Input

™

Power Switch

∞

ES150P

SYSTEM CONNECTIONS

If you have a Dolby®Digital or DTS®receiver/processor with a low-frequency-effects (LFE) or subwoofer output:

Set LFE/Normal switch to “LFE.”

If your receiver/processor does not contain a Dolby Digital or DTS processor, but has subwoofer outputs:

Set line-level/LFE switch to “Normal.”

NOTE: If your receiver/processor has only one sub out, you may use either the L or R input.

ES150P

OPERATION

Power On

Plug your subwoofer’s AC cord into a wall outlet. Do not use the outlets on the back of the receiver.

Initially set the Subwoofer-Level Control £ to the “min” position.

Turn on your sub by pressing the Power Switch §on the rear panel.

Turn on your entire audio system and start a CD or movie soundtrack at a moderate level.

Auto On/Standby

With the Power Switch §in the ON position, the Status LED on the top will remain lit in red or green to indicate the On/Standby mode of the subwoofer.

RED = STANDBY (No signal detected, Amp Off)

GREEN = ON (Signal detected, Amp On)

The subwoofer will automatically enter the Standby mode after approximately 10 minutes when no signal is detected from your system. The subwoofer will then power ON instantly when a signal is detected. During periods of normal use, the Power Switch §can be left on. You may turn off the Power Switch

for extended periods of nonoperation, e.g., when you are away on vacation.

Adjust Gain

Turn your Subwoofer-Level Control £ up to the halfway position. If no sound emanates from the subwoofer, check the AC-line cord and input cables. Are the connectors on the cables making proper contact? Is the AC plug connected to a “live” receptacle? Has the Power Switch §been pressed to the “On” position? Once you have confirmed that the subwoofer is active, proceed by playing a CD, record or cassette. Use a selection that has ample bass information.

Set the overall volume control of the preamplifier or stereo to a comfortable level. Adjust the Subwoofer-Level Control £ until you obtain a pleasing blend of bass. Bass response should not overpower the room but rather be adjusted so there is a harmonious blend across the entire musical range. Many users have a tendency to set the subwoofer volume too loud, adhering to the belief that a subwoofer is there to produce lots of bass. This is not entirely true. A subwoofer is there to enhance bass, extending the response of the entire system so the bass can be felt as well as heard. However, overall balance must be maintained or the music will not sound natural. An experienced listener will set the volume of the subwoofer so its impact on bass response is always there but never obtrusive.

MAINTENANCE AND SERVICE

The enclosure may be cleaned using a soft cloth to remove fingerprints or to wipe off dust.

The grille may be gently vacuumed. Stains may be removed with an aerosol cleaner, following its instructions. Do not use any solvents on the grille.

All wiring connections should be inspected and cleaned or remade periodically. The frequency of maintenance depends on the metals involved in the connections, atmospheric conditions and other factors, but once per year is the minimum.

If a problem occurs, make sure that all connections are properly made and clean. If a problem exists in one loudspeaker, reverse the connection wires to the left and right system. If the problem remains in the same speaker, then the fault is with the loudspeaker. If the problem appears in the opposite speaker, the cause is in another component or cable. In the event that your subwoofer ever needs service, contact your local JBL dealer, or visit www.jbl.com for a service center near you.

Phase Control

The Phase Switch ¡ determines whether the subwoofer speaker’s pistonlike action moves in and out with the main speakers, 0˚, or opposite the main speakers, 180˚. Proper phase adjustment depends on several variables such as room size, subwoofer placement and listener position. Adjust the phase switch to maximize bass output at the listening position.

Crossover Adjustment

The Crossover Adjustment 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 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 Crossover Adjustment control to a higher setting, between 120Hz and 150Hz.

NOTE: This control will have no effect if the LFE/Normal Selector ™ is set to LFE. If you have a Dolby Digital or DTS processor/receiver, the Low-Pass Frequency is set by the processor/receiver. Consult your owner’s manual to learn how to view or change this setting.

ES150P

ES150P Test Set Up and Procedure

Equipment needed:

• Function/signal generator/sweep generator

• Integrated Amplifier

• Multimeter

• Speaker cables

General Unit Function (UUT = Unit Under Test)

1) From the signal generator, connect line level (RCA) cables to the Subwoofer Line Level Input jacks L/R on the UUT. Use a Y-cable from a mono source if necessary to connect to both inputs.

2) Turn the CROSSO VE R control to maximum (150).

3) Turn the LEVEL control on the UUT to completely counterclockwise (MIN).

4) LFE/NORMAL switch should be in NORMAL position .

5) PHASE switch position does not matter.

6) Turn on gener ator ; adjust to 75m V, 50 H z.

7) Plug in UUT; turn the power switch ON. LED should switch from Red to Green.

8) Turn LEVEL control full clockwise (MAX); immediate and vigorous bass response should be heard and felt from port tub e op eni n g on the bottom.

9) Turn off generator, turn LEVEL control full counterclockwise (MIN), and disconnect RCA cable.

Sweep Function

1) Follow steps 1-8 above, using a sweep generator as a signal source.

2) Sweep generator from 20Hz to 300Hz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or any other noi s es . If any unusual noises are hear d, remove woofer and test.

Driver Function

1) Re m ove woofer from cabinet; detach + and - wire clips.

2) Check DC resistance of woofer; it should be 3.4 ohms ±10%

3) Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier fed by a signal generator. Turn on generator and adjust so that speaker level output is 5.0V.

4) Sweep gener a tor fr om 20H z to 1k H z. Li sten to driver for an y ru bbing, buzzing , or other un usual nois es .

ES150P

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