JBL SCS178 manual R O U B L E S H O O T I N G

T	R O U B L E S H O O T I N G
If	there is no sound from any of		• If your receiver/processor is		If there is no sound from the
the speakers:			set in Dolby Pro Logic mode,		surround speakers:
• Check that receiver/amplifier			make sure the center speaker		• Check all wires and
is on and a source is playing.			is not in phantom mode.		connections between
• Check that the powered			• If your receiver/processor		receiver/ amplifier and
subwoofer is plugged in, its			is set in Dolby Digital or DTS®		speakers. Make sure all wires
Power switch ¡ is switched			mode, make sure the		are connected. Make sure
on to the “ON•” position.			receiver/processor is con-		none of the speaker wires are
• Check all wires and			figured so that the center		frayed, cut or punctured.
connections between			speaker is enabled.		• Review proper operation of
receiver/ amplifier and					your receiver/amplifier and its
speakers. Make sure all wires			If the system plays at low		surround-sound features.
are connected. Make sure			volumes but shuts off as		• Make sure the movie or TV
none of the speaker wires are			volume is increased:		show you are watching is
frayed, cut or punctured.			• Check all wires and connecti-		recorded in a surround-sound
• Review proper operation of			ons between receiver/		mode. If it is not, check to see
your receiver/amplifier.			amplifier and speakers. Make		if your receiver/ amplifier has
			sure all wires are connected.		other surround modes you
If there is no sound coming			Make sure none of the		may use.
from one speaker:			speaker wires are frayed, cut		• In Dolby Digital or DTS®
• Check the “Balance” control			or punctured.		modes, make sure your
on your receiver/amplifier.			• If more than one pair of main		receiver/processor is
• Check all wires and con-			speakers is being used, check		configured so that the
nections between receiver/			the minimum impedance		surround speakers are
amplifier and speakers. Make			requirements of your		enabled.
sure all wires		are connected.	receiver/amplifier.		• Review the operation of your
Make sure none of the					DVD player and the jacket of
speaker wires are frayed, cut			If there is low (or no) bass		your DVD to make sure that
or punctured.			output:		the DVD features the desired
• In Dolby Digital or DTS®			• Make sure the connections to		Dolby Digital or DTS® mode,
modes, make sure that the			the left and right “Speaker		and that you have properly
receiver/processor is			Inputs” have the correct		selected that mode using both
configured so that the			polarity (+ and –).		the DVD player’s menu and
speaker in question is			• Make sure the subwoofer is		the DVD disc’s menu.
enabled.			plugged into an active
			electrical	outlet.
If there is no sound from the			• Make sure	the powered
center speaker:			subwoofer	is plugged in and
• Check all wires and			switched on.
connections between			• In Dolby Digital or DTS®
receiver/			modes, make sure your
amplifier and speaker. Make			receiver/processor is
sure all wires are connected.			configured so that the
Make sure none of the			subwoofer and LFE output are
speaker wires are frayed, cut			enabled.
or punctured.

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