JobSite Systems A30-X12 - Manual (Page 10)

8
TROUBLESHOOTING
No sound on one channel
BusMatrix DIP switch is not in the correct
position. Check your configuration
worksheet for the correct setting and verify.
You could have a short circuit or loose wire
at speaker or amplifier terminals. Check that
connections are secure and that there are
no loose strands of wire crossing from the
positive to the negative terminal at the back
of the amplifier and the speaker.
Audio cable to dedicated input is bad.
Connect the non-working channel input to
another cable that is known to be good.
Bridging Switch is in the wrong position.
Check your configuration worksheet for the
correct setting and verify.
The thermal protection circuit has operated
because of overheating caused by
overdriving or inadequate ventilation.
No sound on some or all
channels
BusMatrix DIP switches are not in the
correct positions. Check your configuration
worksheet and verify all settings.
Audio cable to the main bus inputs is bad.
Connect the non-working channel input to
another cable that is known to be good.
Some or all of the internal
amplifier fuses are blown.
(Return the amplifier to your dealer for
service).
Hum from all of the speakers
Hum may be caused by a ground loop
between two components in the system. To
test for a ground loop, try reversing the ac
plugs of each of the components in the
system, that has non-polarized plugs.
Check for faulty cables, faulty source
material, an ungrounded phono system,
cable TV feed or a defective component.
Amp will not turn on
AC power cord must be plugged into a
working outlet.
Master power switch must be on.
Test that the AC power receptacle is
working. If the outlet tests O.K., the internal
fuses are blown. Return the amplifier to
your dealer for service.
Sound is distorted on one or
all of the channels at normal
volumes
BusMatrix DIP switches are not in the
correct positions. Check your configuration
worksheet and verify all settings.
Normal volume cannot be
reached
One of the internal amplifier fuses is blown.
(Return the amplifier to your dealer for
service).
Bass sound is weak and the
stereo image is “phasey”
sounding in one room
Check that the bridging switch is “Off”. If
two adjacent channels are connected
normally but the bridging switch is set to
the “Bridged” position, the two speakers
will play out of phase with each other.
The loudspeakers are wired out of phase.
Reverse the connections at the back of
one speaker.