Troubleshooting - JBL SUB500 Service Manual

SUB500 (SCS500.5 Subwoofer)
OPERATION
Move the Master Power switch If you will be away from home
(marked "Power" å) to the " • "
for an extended period of time,
(On) position to use the sub- or if the subwoofer will not be
woofer. The SUB500 subwoofer used, switch the Master Power
switch å to the Off position.
will automatically turn on or go
into standby (sleep) mode
when left in the auto mode
("Auto/On" switch ç in the
"Auto" position). When your
receiver or amplifier is off, or is
not sending program material
to the subwoofer, the sub-
woofer will be in standby mode
(LED will be red). When the
subwoofer senses an audio sig-
nal, it will automatically turn on
(LED will be green). If the sub-
woofer does not sense a signal
after approximately 20 minutes,
it will automatically go into
standby mode.
When the "Auto/On" switch ç
is switched to the "On" posi-
tion, the subwoofer will remain
on, whether or not program
material is playing.
VOLUME
ç
∫
å
C A U TIO N C A U TIO N
R ISK OF ELEC TR IC SH O C K R ISK OF ELEC TR IC SH O C K R ISK OF ELEC TR IC SH O C K
D O NO T OPE N D O NO T OPE N D O NO T OPE N
Volume may be adjusted
using the Subwoofer Level
∫
control as shown.

TROUBLESHOOTING

If there is no sound from any
of the speakers:
• Check that receiver/ampli-
fier is on and a source is
playing.
• Check that the powered
subwoofer is plugged in,
and its Power switch å is
switched on (" • " position).
• Check all wires and con-
nections between receiver/
amplifier and speakers.
Make sure all wires are con-
nected. Make sure none of
the speaker wires are
frayed, cut or punctured, or
touching each other.
• Review proper operation of
your receiver/amplifier.
If there is no sound coming
from one speaker:
• Check the "Balance" control
on your receiver/amplifier.
• Check all wires and con-
nections between receiver/
amplifier and speakers.
Make sure all wires are con-
nected. Make sure none of
the speaker wires are
frayed, cut or punctured, or
touching each other.
• In Dolby Digital or DTS
modes, make sure that the
receiver/processor is config-
ured so that the speaker in
question is enabled.
• Turn off all electronics
and switch the speaker in
question with one of the
other speakers that are
working correctly. Turn
everything back on, and
determine whether the
problem has followed the
speaker, or has remained
in the same channel. If the
problem is in the same
channel, the source of the
problem is most likely with
your receiver or amplifier,
and you should consult the
6
owner's manual for that electrical outlet, and is
product for further informa- turned on (Power switch
tion. If the problem has fol- å in the " • " position).
lowed the speaker, consult
• In Dolby Digital or DTS
your dealer for further assis-
modes, make sure your
tance or, if that is not possi-
receiver/processor is config-
ble, visit www.jbl.com.
ured so that the subwoofer
If there is no sound from the and LFE output are enabled.
center speaker:
If there is no sound from
• Check all wires and con- the surround speakers:
nections between receiver/
• Check all wires and con-
amplifier and speaker. Make
nections between receiver/
sure all wires are connected.
amplifier and speakers.
Make sure none of the
Make sure all wires are con-
speaker wires are frayed,
nected. Make sure none of
cut or punctured, or touch-
the speaker wires are
ing each other.
frayed, cut or punctured, or
• If your receiver/processor touching each other.
is set in Dolby Pro Logic mode,
• Review proper operation of
make sure the center speaker
your receiver/amplifier and
is not in phantom mode.
its surround sound features.
• If your receiver/processor
• Make sure the movie or
is set in one of the Dolby
TV show you are watching
Digital or DTS modes, make
is recorded in a surround
sure the receiver/processor
sound mode. If it is not,
is configured so that the
check to see whether your
center speaker is enabled.
receiver/amplifier has other
If the system plays at low surround modes you may use.
volumes but shuts off as
• In Dolby Digital or DTS
volume is increased:
modes, make sure your
• Check all wires and con- receiver/processor is config-
nections between receiver/ ured so that the surround
amplifier and speakers. speakers are enabled.
Make sure all wires are con-
• Review the operation of
nected. Make sure none of
your DVD player and the
the speaker wires are
jacket of your DVD to make
frayed, cut or punctured, or
sure that the DVD features
touching each other.
the desired Dolby Digital or
• If more than one pair of DTS mode, and that you
main speakers is being used, have properly selected that
check the minimum imped- mode using both the DVD
ance requirements of your player's menu and the DVD
receiver/amplifier. disc's menu.
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 the subwoofer
is plugged into an active