Troubleshooting - JBL SYNTHESIS FOUR S4Ai Owner's And Installer's Manual

T
ROUBLESHOOTING
S
YMPTOM
No sound coming
from speaker
P C
ROBABLE AUSE
• Amplifier not turned on
• Amplifier gain is low
• Correct source not
selected or turned on
• Defective patch cords to amplifier
• Speaker wires not
connected to amplifier
• Balance control set improperly
• Speaker wires damaged
or shorted
• Speaker not configured
correctly
• Center speaker is configured
incorrectly
• Problem not diagnosed
21
S
OLUTION
• Turn on amplifier.
• Make sure that there is
amplifier gain for that channel.
• Select proper source.
• Check/replace patch cords.
• Check speaker wire
connection to amplifier.
• Make sure Balance control is set
at center, or 12 o'clock, position.
• Make sure none of the speaker wires
are frayed, cut or punctured. Make sure
no wires are touching other wires or
terminals and creating a short circuit.
• In Dolby ® Digital or DTS ® mode, make
sure that the receiver/processor is
configured so that the speaker in
question is enabled.
• In Dolby Pro Logic ® mode, make sure the
center speaker is not in phantom mode.
• To diagnose the likely source of the
problem, it is often helpful to switch the
nonfunctioning speaker with one that
is functioning correctly. Turn off all
electronics before exchanging the
speakers. Turn everything back on, and
determine whether the problem is in
the same place, or has moved with the
speaker. If the problem is in the same
place, the source is most likely with your
receiver or amplifier. If the problem has
followed the speaker, then contact your
authorized JBL Synthesis custom installer
or dealer for further assistance. If that
is not possible, visit our Web site at
www.jblsynthesis.com for further information.