impact LK 705 Owner's Manual

Troubleshooting
Before removing your amplifier, refer to the list below and follow the suggested
procedures. Always test the speakers and their wires first.
No Output
Confirm that all terminal strip connections are secure and tight.
Check both in-line and built-in fuses. Both the "+12V" and the "REMOTE" terminals must
have +12V referenced to chassis ground.
Confirm that the audio signal source (car radio, equalizer, etc.) is connected
output signal. To check if the amplifier is supplying signal, unplug the RCA cables from the
signal source (but leave them plugged into the amp). Gently tap the center pin of each of
the disconnected RCA plugs with your finger. This should produce a noise (feedback) in
your speakers.
Confirm that all speaker strip connections are secure and tight.
Only one
channel
Check the "BALANCE" control on the head unit (or other source) to verify that it is set to
works
its midpoint.
If you are using the Low Level RCA Inputs, reverse the input plugs at the amplifier
(switches the R with the L). If the channel which is silent switches to other side,
the problem is either in the head unit/other source or the connecting cables.
Weak Output
Readjust the Input Sensitivity Control to better suit the input signal.
Noise in the
If the noise is a "whine" whose pitch follows the engine speed, confirm that the
Audio
amplifier and any other signal sources ( head unit, etc.) are properly grounded.
If the noise is a "clicking" or "popping" noise whose rate follows the engine speed, this
usually means that the vehicle is equipped with resistor spark plugs and wires, or that
the ignition is in need of service.
Check the routing of the speaker and input wires to make sure they are not adjacent to
wires which interconnect lights and other accessories.
-12-
and is supplying
LK 705