Appendix C: Troubleshooting
Appendix C: Troubleshooting
If you encounter problems with LPX, Gibson recommends that you take it to an authorized
service center. Although there are some procedures you can try yourself,
be careful—
if you
have
any
doubt about your ability to do any of these fixes, please consult Gibson tech
support.
One or more strings don't seem to tune correctly, but the rest do.
There can be several possible reasons for this problem:
The nut slot too high and there's too much friction
The lock nut on the string post is not tight enough
The string was strummed too hard, causing it to go sharp
A sticky string bar in the saddle causes pitch detection to fail
The tailpiece is set too low, so the string touches the bridge base and shorts out to
it.
Observe what happens when you try to tune the problematic string. Here's what should
happen:
You strum, and the respective string LED should start flashing
red
to indicate that
pitch detection is active.
Next, the LED should start flashing yellow (information is being sent to the neck CPU,
and the Robo-Tuner starts to move).
After tuning the string, the string's LED turns
green
to indicate the string is in tune.
If not, try these fixes:
Remove the problematic string and make sure the string bar is not inclined in the
saddle, and that you can move the string bar up and down a little bit; it must not be
sticky in its saddle. Sometimes just “unsticking” the string bar is enough to solve the
problem.
Re-string the string and tap the string bar gently. Check that the string bar is not
inclined, and that the tuner post’s lock nut is set tight.
If all else fails, tune the problematic string to your liking, and save as a Custom
tuning preset as described on page 31.
My headstock hit against the wall, and now one of the Powertune heads doesn't work.
If you hear a winding noise but the Robo-Tuner doesn't move, it might be a connection issue
from the powerhead to the neck circuitry.
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