HT 1S - JBL Audio User Guide / Operation Manual. Page 8

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9
Bass is very weak AND/OR
sound seems to come from,
instead of 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
the back and side walls or too
far apart. Experiment again
with the speaker placement. If
you are still encountering
problems, consult your JBL
dealer.
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.
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 commercial 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 this is impractical,
call 800-336-4JBL for your nearest
warranty station. Do not return
products to the JBL factory without
prior authorization.
TROUBLESHOOTING
The vast majority of new speaker
"malfunctions" end up being
traced to connections or switch
settings. To avoid requesting
service for correctly functioning
speakers, check the following tips
before requesting service.
No sound at all or very faint
sound from either speaker
1
. Amp/receiver tape monitor
button pushed in while using
CD, FM or phono inputs.
2. Wrong speaker switch, "A" or
"B" speaker output.
3. Sound source (CD,cassette
deck, turntable) not turned on,
not activated, not hooked up or
not selected on amp/receiver
front panel.
No sound from one speaker
1. 
Balance control turned all the
way left or right.
2. Speaker wire has become
disconnected.
3. One of the connections
between sound source and
amp/receiver is faulty or has
become disconnected.
Both speakers play at low
volumes but shut off as volume
is increased OR sound turns on
and off intermittently
A few strands of speaker wire may
be shorting out. Recheck the
connections.
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