JBL E150P Service Manual.pdf

Northridge ™ E-Series

E150P

Powered Subwoofer

Service Manual

JBL Consumer Products

250 Crossways Park Dr.

Woodbury, New York 11797

Rev2 2/2004

- CONTENTS -

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

SAFETY INFORMATION …………….……..….………..2

DETAILED SPECIFICATIONS ……….……..…………..3

CONNECTIONS………………………...……..…...…..…4

OPERATION ……..………………….……...…….….…...7

BASIC TROUBLESHOOTING..………….………………8

EXPLODED VIEW/PARTS LIST…….….….…………....9

TEST SET-UP AND PROCEDURE….….……………...10

AMPLIFIER BLOCK DIAGRAM…….………….……..…11

TECH TIP JBLTT2003-04 ..……….……………….…...12

DETAILED TROUBLESHOOTING..……………… ……13

P.C.B. DRAWINGS….…………………………………….16

ELECTRICAL PARTS LIST ..……….……….……….…20

IC/TRANSISTOR PINOUTS..……..….…….….….….….24

SCHEMATICS………..……………………….…………..25

PACKING……..……………………………….….….…...27

E150P SPECIFICATIONS

Amplifier Power (RMS):

150 Watts

Peak Dynamic Power *:

250 Watts

Driver:

10" (254mm) 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:

27Hz – Low-pass crossover setting

Dimensions (H x W x D):

17-3/4" x 12-1/4" x 14-1/2"

(451mm x 311mm x 368mm)

Weight:

33.5 lb/15.2kg

JBL continually strives to update and improve existing products, as well as create new ones. The

specifications and details in this and related JBL publications are therefore subject 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.

E150P

SAFETY INFORMATION

Warning

List of Safety Components

Requiring Exact Replacements

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!

Part Number/

Designator

Description

093-205209-300

Line Fuse Slo Blo 1.25A

5x20mm

Caution

083-041802-009

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.

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.

PT1

042-010052-003

Power Transformer.

Use only factory

replacement.

BR1

052-400080-000

Bridge diode. Use only

factory replacement.

Leakage/Resistance Check

4700uF 50V electrolytic

filter caps. Be sure

replacement part is at

least the same working

voltage and capacitance

rating. Also the lead

spacing is important.

Incorrect spacing may

cause premature failure

due to internal cabinet

pressure and vibration.

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.

C6,8

034-470745-200

063-531808-000

Rear Amp Cover

Use only factory

replacement

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.

Inductor

043-560200-000

L1 - Use only factory

replacement

Inductor

043-300101-000

L2 - Use only factory

replacement

WARNING! DO NOT return the unit to the customer if it

fails one of these tests until the problem is located and

corrected.

Inductor

043-700101-000

L3 - Use only factory

replacement

Critical Components

Inductor

043-324300-000

L4 - Use only factory

replacement

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.

JBL E150P Powered Sub/ Plate Amp

LINE VOLTAGE

Yes/No

Hi/Lo Line

Nom.

Unit

Notes

US 120vac/60Hz

Yes

108-132

120

Vrms

Normal Operation

EU 230vac/50-60Hz

Yes

207-264

230

Vrms

Normal operation, MOMS required

Parameter

Specification

Unit

QA Test

Limits

Conditions

Notes

Amp Section

Type (Class AB, D, other)

n/a

Class D Preferred...Sink required for Class AB

Load Impedance (speaker)

Ohms

n/a

Nominal

Z-curve required

Rated Output Power

Watts

1 input driven

AVG RMS Dynamic Power

150

Watts

135

Average RMS power, 3/20 Cycles 50 Hz, Driven

6dB above its input sensitivity sensitivity

THD @ Rated Power

0.3

22k filter

75 Watts

THD @ 1 Watt

0.1

0.5

22k filter

DC Offset

10 mV-DC

@ Speaker Outputs

Measured at the amplifier board THD < 0.1% 75

Watts @ 50Hz

Damping factor

Measured at amplifier board

Input Sensitivity

Input Frequency

Nominal Freq.

L&R

128 mVrms

±2dB

To 75 Watts

Single input driven LP defeat switch OFF

LFE

128 mVrms

±2dB

To 75 Watts

LP defeat switch ON- Single input driven

Speaker/Hi Level Input

1.28

Vrms

±2dB

To 75 Watts

Single input driven

Signal to Noise

SNR-A-Weighted

100

dBA

relative to rated power

A-Weighting filter

SNR-unweighted

dBr

relative to rated power

22k filter

SNR rel. 1W-unweighted

dBr

relative to 1W Output

22k filter

Residual Noise Floor

1 mVrms

Volume @max, using DVM or A/P

(BW=20 KHz)

Line level inputs must be terminated using

1KOHM

Residual Noise Floor

1.5 mVrms(max)

Volume @max, w/ A/P Swept

Bandpass Measurement (Line

freq.+ harmonics) (BW=20Khz)

Line level inputs must be terminated using

1KOHM

Input Impedance

Line Input

10K

ohms

n/a

Nominal

Speaker/Hi Level Input

>4.7K

ohms

n/a

Nominal

Filters

Speaker in LP 2nd order varia

60-150 Hz

± 10

Subsonic filter (HPF) fixed 6th

Fixed

LFE Low pass 2nd order fixed

200>LP<1K Hz

Single input driven

Speaker out HP filter

Left & Right outputs

200 Hz

± 10

Speaker input driven - Speaker out

loaded with 4 Ohms

(Applies only to 230V Model)

Note: 120V Models do not

have speaker output

100 Hz

± 10

Speaker input driven - Speaker out

loaded with 8 Ohms

(Applies only to 230V Model)

Limiter

THD at Max. Output Power

n/a

functional Maximum Output Power

Maximum THD as a result of limiting.

Features

Volume pot Taper (lin/log)

LOG

functional

A Taper

Phase switch

0-180

deg

functional

LP Defeat switch

YES

functional

LFE function selection

Input Configuration

Line In & LFE

YES

functional

LR dual RCA jack

Spkr/Hi Level In

YES

functional

Binding post connector L&R

Signal Sensing (ATO)

Auto-Turn-On (yes/no)

YES

functional Auto - on selection switch in Auto

ATO Input test frequency

functional

ATO Level LFE Input

functional

ATO Level Speaker in

functional

ATO Turn-on time

functional

Amp connected and AC on, then

input signal applied

Auto Mute/ Turn-OFF Time

15 minutes

T before muting, after signal is

removed

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

Minutes

Power on Delay time

sec.

AC Power Applied

Transients/Pops

ATO Transient

5 mV-peak

n/a

@ Speaker Outputs

Turn-on Transient

50 mV-peak

2v-pp @ Speaker Outputs

AC Line cycled from OFF to ON

Parameter

Specification

Unit

QA Test

Limits

Conditions

Notes

Turn-off Transient

50 mV-peak

2v-pp @ Speaker Outputs

AC Line cycled from ON to OFF

Efficiency

Nominal Line voltage 120 VAC / 230 VAC

Stand-by Input Power

Watts

@ nom. line voltage

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

Minutes

Power Cons. @ rated power

115

Watts

120

@ nom. line voltage

75 Watts @ 4 Ohms nominal line voltage

Protections

Short Circuit Protection

YES

functional Direct short at output

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).

Thermal Protection

YES

functional @1/8 max unclipped Power

Design must insure no Offset at the speaker

output under any operating condition including

abnormal operation

DC Offset Protection

YES

DC present at Speaker Out leads

Line Fuse Rating

US Domestic version

1.25

Amps

1.25

Type-T or Slo Blo-250 V

Internal fuse with UL/SEMKO rated holder

0.8

Amps

0.8

Type-T or Slo Blo-250 V, Low

Breaking capacity

Internal fuse with UL/SEMKO rated holder

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

SPEAKER CONNECTION

When we designed the

E150P and E250P powered

subwoofers, our goal was

to offer the user the best pos-

sible 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 termi-

nals 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 con-

nection 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 equip-

ment due to improper connec-

tions 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.

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