page 15
P R O
www.earthquakesound.com
XJ-1000 FR
Amplifier “ON” No Sound
Turn amplifier ON and circuit breaker shuts down
This can either be a short in amp, a poor circuit breaker in
the house or the power cord is not fully connected. Plug
amplifier into another outlet on a different circuit breaker
with nothing connected. If the amp turns on then the
problem is with your home circuit breaker. If the amplifier
still does not power up, please call Earthquake to consult
with a technician.
Humming noise from speakers
Peak LEDs “ON” Constantly
It is normal when running the amplifier to full power that the
LEDs flicker. If the LEDs are on constantly without
flickering (solid red) it means that the amplifier output is
clipping. Reduce volume level to prevent damage to
speakers or amplifier.
Often humming noise is emanating from equipment that
have their ground prong broken. To isolate this problem:
a) With the amplifier OFF, unplug all RCAs connected to
the amp.
b) Turn on amp and listen to speakers. If buzz has
changed or reduced in level, then the problem is
coming to the amp from another source. The rest of
the hum you hear is normal and related to the fact
that the RCAs are open ended.
c) The above step should isolate your problem: star-
ground all components, except amplifier, by daisy-
chaining a thin wire from the processors chassis to all
sources connected to it.
The following maintenance should be performed routinely:
- Clean the exterior surfaces of the unit with a soft, dry, lint-
free cloth.
- Do not use alcohol, benzene, acetone-based cleaners, or
strong commercial cleaners.
- Do not use a cloth made with steel wool or metal polish.
If the unit is exposed to a dusty environment, a low-
pressure blower may be used to remove dust from its
interior & exterior.
Maintenance
Trouble Shooting and Maintenance
b) Now turn on the amplifier only. Check to see if the front
Main Power Switch is on.
c) Check the Input Selector switch and make sure that it is
in the correct position. Either RCA or XLR which ever
you are using. Also slide the Input Selector switch back
and forth to ensure good contact.
d) Set the crossover switch so that it is centered. Slide it up
and down and finally back to the middle position.
e) Confirm that the output wires are connected to the
speaker.
f ) Rock the crossover switch back & forth at the amplifier,
you should hear a thump through the speaker during
this process.
WHEN A THUMP IS HEARD:
Check your input source signal. Make sure they are
connected properly to output from processor/source,
not input of processor.
Try to change source to make sure that at least one of
the sources works.
WHEN NO THUMP IS HEARD:
Check amplifier speaker connections and make sure
the speaker wires are securely connected to the
amplifier speaker output and to the speaker.
NOTE:
It is possible that if you have proper
connections and you don’t hear sound, the speaker is
burnt.
a) Completely shut your system down, turn OFF the
Power switch in the front
of
the amplifier (see
Page 6 , #1).
We recommend that you first call the dealer where
you purchased the amplifier. If Problems Persist,
contact:
Earthquake Sound Technical Service
Phone: 1-800-576-7944 or 510-732-1000
Email: [email protected]
