Bass is very weak AND/OR sound
seems to come from each speaker
separately, without creating a
stable stereo image between the
speakers.
1.
The polarity (+ & –) of one speaker
has been reversed relative to the
other. Double check connections.
2.
Speakers are too far away from
back and side walls or too far apart.
Experiment again with the speaker
placement. If you are still encounter-
ing problems, consult your JBL
dealer.
Additional Areas to Check When
Using an AV Receiver:
No sound at all or very faint sound
from the center channel or other
speakers
1.
Speaker wire has become discon-
nected.
2
. One of the connections between
sound source and AV receiver/amp is
faulty or has become disconnected.
3
. AV receiver/amp center channel
mode not selected. Please select a
mode that activates the center
channel.
4.
Rear/surround information may not
be recorded in some scenes and
passages.
5.
AV receiver/amp “audio direct”
switch is activated. This switch
should be off to activate the 5
speaker surround mode.
6
. Sound source (VDP, VCR, CD,
cassette deck, turntable) not turned
on, not activated, not hooked up or
not selected on AV receiver/amp
front panel.
GENERAL CARE
The grille is held in place by pins
near the edges. To remove the grille,
grasp it by both top and bottom
edges and pull gently. To replace
grille, re-position it carefully and
press gently at the corners. Do not
push on the center area of the grille.
NOTE: The J50 grille is non-
removable. Do not attempt to pry
the grille from the cabinet as this
will void your warranty. The rear
panels are removable to allow ser-
vice personnel access to the driver
components if needed.
The loudspeaker cabinet may be
cleaned with a slightly damp cloth. To
remove dust from the grille cloth, use
a vacuum with a brush attachment.
Spots may be removed with a com-
mercial spot remover. Do not use any
cleaners or solvents on the speaker
drivers themselves.
SERVICE
Should your loudspeaker ever need
service, return it to the JBL dealer
from whom it was purchased. If for
some reason this is impractical, in the
United States, call 800-336-4JBL for
your nearest warranty station.
Military personnel who purchased
from authorized military outlets
should return them to a similar outlet
or contact:
ALA Associates Enterprises
985 Ponce de Leon Avenue
Atlanta, GA 30306
Phone: 800-875-4252
Fax: 404-873-3592
If purchased outside the United
States, contact your local distributor
to make arrangements for repair
service.
Do not return products to
the JBL factory without prior
authorization.
6
J Series OM 7/27/98 3:50 PM Page 6
