SCS 200 (serv.man13) - JBL Audio Service Manual (repair manual). Page 13

• 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
connected. Make sure
none of the speaker wires
are frayed, cut or punc-
tured, or touching each
other.

• Review proper operation of

your receiver/amplifier.

• Check the “Balance” control

on your receiver/amplifier.

• Check all wires and con-

nections between receiver/
amplifier and speakers.
Make sure all wires are
connected. Make sure
none of the speaker wires
are frayed, cut or punc-
tured, or touching each
other.

• In Dolby Digital or DTS

modes, make sure that the
receiver/processor is con-
figured 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 is
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
owner’s manual for that
product for further informa-
tion. If the problem has fol-
lowed the speaker, consult
your dealer for further
assistance or, if that is not
possible, visit 
www.jbl.com.

• Check all wires and con-

nections between receiver/
amplifier and speaker.
Make sure all wires are
connected. Make sure
none of the speaker wires
are frayed, cut or punc-
tured, or touching each
other.

• If your receiver/processor

is set in Dolby Pro Logic
mode, make sure the center
speaker is not in phantom
mode.

• If your receiver/processor 

is set in one of the Dolby
Digital or DTS modes, make
sure the receiver/processor 
is configured so that the
center speaker is enabled.

• Check all wires and con-

nections between receiver/
amplifier and speakers.
Make sure all wires are
connected. Make sure
none of the speaker wires
are frayed, cut or punc-
tured, or touching each
other.

• If more than one pair of

main speakers is being
used, check the minimum
impedance requirements of
your receiver/amplifier.

• 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
electrical outlet, and is
turned on (Power switch 

å

in the “•” position).

• In Dolby Digital or DTS

modes, make sure your
receiver/processor is con-
figured so that the sub-
woofer and LFE output are
enabled.

JBL

SCS200.5/230 Service Manual

Page 13 of 53