JBL E150 Service Manual

 
  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 SPECIFICAT IONS ……….……..…………..3 
CONNECTIONS………………………...……..…...…..…4 
OPERATION ……..………………….……...…….….…\
...7 
BASIC TROUBLESHOOT ING..………….………………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...

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...

JBL E150P Powered Sub/ Plate Amp 
LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit NotesUS 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) D n/a n/a
Class D Preferred...Sink required for Class AB
Load Impedance (speaker) 4 Ohms n/a
Nominal Z-curve required
Rated Output Power 75 Watts 70
1 input driven
AVG RMS  Dynamic Power 150 Watts...

Parameter Specification UnitQA Test 
Limits Conditions NotesTurn-off Transient 50 mV-peak 2v-pp
@ Speaker Outputs AC Line cycled from ON to OFF
Efficiency
Efficiency 65 % 64
Nominal Line voltage 120 VAC / 230 VAC
Stand-by Input Power 15 Watts 18
@ 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...

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 sub-
woofer, 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...

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 Low-
Frequency Effects channel.
Connect these jacks to the LFE
output or subwoofer output on
your receiver or amplifier. 
Note:...

OPERATION

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.Note: It will take several min-
utes 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, 
high-efficiencyamplifier design, power con-sumption is minimal when the
subwoofer is not receiving a
signal. Of course, the sub-
woofer can be turned off,...

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 connec-
tions between the receiver/
amplifier and the speakers.
Make sure all wires are con-
nected. Make sure none of
the speaker wires are frayed,
cut or punctured, or touching
each other, except for...

  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Ref# Part Number Description Qty 
    
1 350883-001 MANUAL, OWNER-E150P/E250P 1 
2 350884-002 CARTON,MASTER-E150P  (BEECH MODEL)    1 
 350884-001 CARTON,MASTER-E150P  (BLACK MODEL) 1 
 350884-003 CARTON,MASTER-E150P  (CHERRY MODEL) 1 
3 350885-001 PAD,END,TOP-E150P 1 
4 350885-002 PAD,END,BOT-E150P 1 
5 338381-001 WARRANTY CARD,1/5YR,JBL 1 
6 351348-001 PLATE,LED/LOGO-E150P/E250P 1 
7 338125-002 ASY,LED-E150P/E250P 1 
8 336486-001...