Gibson LP STD LTD Manual v1.0
Page 37
My
headstock
hit
against
the
wall,
and
now
one
of
the
Powertune
heads
doesn't
work.
If
you
hear
a
winding
noise
but
the
RoboHead
doesn't
move,
it
might
be
a
connection
issue
from
the
powerhead
to
the
neck
circuitry.
Inspect
the
tuning
peg
that
doesn't
work.
If
its
case
is
rotated,
rotate
the
RoboHead
back
to
its
original
position
(level
with
the
back
plate
with
the
lit
up
G);
this
should
fix
the
problem.
Then,
tighten
the
nut
to
make
sure
the
RoboHead
stays
in
this
position.
Avoid
over
tightening—do
not
exceed
1
ft/pound
torque
maximum.
For
a
“tighter”
rhythm
guitar
part
when
recording,
I
wanted
to
remove
the
A,
G,
and
(high)
e
strings
because
I
kept
hitting
them
accidentally,
but
then
the
tuning
system
didn't
work.
Why?
The
strings
carry
low
voltages
and
data,
as
well
as
provide
grounding.
The
E,
D,
and
B
strings
are
ground.
The
A,
G,
and
high
e
strings
carry
a
positive
voltage
and
data.
By
removing
those
three
strings,
there
was
no
way
for
the
tuning
system
to
provide
data
on
how
to
tune
the
strings.
The
string
LEDs
are
flashing
white,
and
tuning
doesn't
work
at
all.
A
white
flashing
string
LED
indicates
a
short
circuit.
The
strings
carry
power
and
data
to
the
neck,
so
even
if
only
one
string
is
touching
a
hardware
part
(bridge,
tailpiece,
even
a
fret
bar)
or
another
string,
the
tuning
system
won't
work.
Also
note
that
if
the
Gibson
"G"
on
the
neck
electronic
cover
does
not
start
flashing
once
you
activate
the
system,
it
is
most
likely
that
there
is
also
a
white
LED
on
the
MCK
flashing
to
indicate
there's
a
short
circuit,
and
therefore,
no
power
going
to
the
neck
electronics.
Please
check
the
following:
•
The
string
ball
ends
must
not
touch
the
tailpiece
at
all.
•
The
strings
must
be
in
the
middle
position
of
each
string
bar.
•
Look
at
the
tuner
posts;
the
strings
must
not
touch
each
other,
so
cut
all
string
ends
very
close
to
its
post.
•
Check
the
tailpiece
and
bridge
height,
then
adjust
if
needed.
When
I
tune
the
RoboHeads
manually,
the
process
seems
extremely
slow.
The
gear
ratio
in
the
RoboHeads
is
24:1,
so
you
need
to
turn
the
tuning
peg
24
times
to
get
one
complete
rotation
of
the
string
post.
This
is
one
reason
why
Gibson
recommends
using
the
Robot
tuning
options,
especially
when
re
‐
stringing.
Please
see
Sections
5.6,
5.7,
and
5.8
for
more
information.