ESC 230 System (serv.man2) - JBL Audio User Guide / Operation Manual. Page 12

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© 1999 JBL, Incorporated. JBL and Simply Cinema are registered trademarks of JBL, Incorporated.

Manufactured under license from Dolby Laboratories Licensing Corporation. 

*Trademarks of Dolby Laboratories. DTS is a registered trademark of Digital Theater Systems, Inc.

Part No. ESC230OM

A Harman International Company

If you hear no sound at all,
check the following:
• Make sure the ESC230
main unit is plugged into a
live electrical outlet and
that the power switch is on.
• Check connections from
the ESC230 main unit to the
TV, VCR, DVD player and
the outboard surround
processor.
• If using with a television
or outboard surround
processor, make sure that
the TV or the surround
processor is on and a signal
is present.
• If using with a VCR, 
make sure the VCR is
playing a tape.
• If using a DVD player,
make sure that the DVD 
is playing.
• If using the 6-channel
digital direct inputs, make
sure that the 6-channel
mode is selected and its
indicator is illuminated on
the display. There will be

no output if the product is
in any other mode.
• If using the conventional
right and left inputs 1 or 
2, make sure that Dolby 
Pro Logic, Hall, Concert or
Stereo mode is selected
and its indicator is
illuminated in the display.
There will be no output if
the product is in the 6-
channel mode. Also make
sure that the appropriate
input (1 or 2) is selected as
illuminated in the display.
• Check all connections
between the ESC230 
main unit and each of 
the speakers. 
If one or more of the speakers
does not play, check the
following:
• Check all connections
between the ESC230 
main unit and each of 
the speakers.
• Adjust the balance
controls from left to right
and front to rear.

If you have very little bass
output, check the following:
• Make sure the subwoofer
is connected properly to the
ESC230 main unit.
• Experiment with
placement of the
subwoofer. Remember,
place the subwoofer in a
corner to get maximum bass
output from the system.
• Make sure 

Bass Boost

is on.
• Adjust 

Bass

level.

If there is no sound coming
from the rear speakers or the
volume is very low, check the
following:
• Check all connections
between ESC230 main unit
and each of the speakers.
• Adjust the front-rear 
balance controls on the
ESC230 main unit.
• Make sure the TVshow or
movie you are watching is
recorded in Dolby Surround.
If it is not, try the 

Concert

Hall

or 

Stereo

settings on

the ESC230 main unit.
When using the 6-channel
digital direct inputs, if there is
no sound coming from 
some channels:
• Make sure that all 6
connectors are securely
connected on both the DVD
player /outboard processor
side and the ESC230 side.
• Make sure that the DVD
player/outboard processor’s
built-in decoder is correctly
configured to provide
output to all 5 satellites
and the subwoofer.
(Depending on the product
you own, you may have to
do this using that specific
product’s on-screen
display.) Make sure that the
satellites are set to 

Small

and the subwoofer is set 
to 

On

by checking the

settings of the DVD player
or outboard surround
processor.

Power Output

20 watts x 6

Signal-to-Noise Ratio

90 dBA

Input Impedance

20k ohms

Input Sensitivity

400 mV

System Frequency Response

35Hz to 20kHz

Dimensions (H x W x D)

Main Unit: 2-11/16 x 13-1/2 x 9 inches

69 x 343 x 230 mm

Satellites:

7-1/2 x 4-1/16 x 4-3/8 inches
190 x 103 x 111 mm

Subwoofer: 17-3/4 x 7-3/4 x 13-7/8 inches

451 x 197 x 352 mm