7.
Hit
PAD
issues
1)
Check
that
the
PAD
structure
is
installed
correctly.
2)
Check
whether
the
connection
line
and
socket
between
the
PAD
and
the
motherboard
are
normal.
3)
Check
whether
the
power
and
ground
are
normal
on
the
PAD.
4)
Check
whether
r125/165
is
welded
normally
on
the
PAD.
5)
Check
PAD
strike
signal,
otherwise
the
sensor
is
damaged.
6)
Check
whether
the
U27/33
(4051)
circuit
is
welded
normally.
If
PIN3
has
no
output,
replace
4051.
8.
Issues
related
to
the
pedal,
slider,
knob
1)
Pedal
circuit
includes
CC
PEDAL/SUSTAIN.
Check
if
the
sockets
and
related
circuit
is
properly
soldered
or
damaged.
2)
Slider
issues
:
a)
Check
whether
the
connection
line
and
socket
are
connected
properly.
b)
Check
whether
the
power
supply
and
ground
are
normal
on
the
small
plate
where
the
push
rod
is
located.
c)
Check
whether
the
push
rod
circuit
is
welded
normally
and
whether
the
device
is
damaged
by
virtual
welding.
d)
Check
whether
the
U5
(4051)
circuit
is
welded
normally
and
PIN3
cannot
output
signals,
then
replace
the
4051.
3)
Knob
issues
:
a)
Check
whether
the
connection
line
and
socket
are
connected
properly.
b)
Check
whether
the
power
supply
and
ground
are
normal
on
the
panel
where
the
knob
is
located.
c)
Check
whether
the
knob
circuit
is
welded
normally
and
whether
the
device
is
damaged
by
virtual
welding.
d)
Check
whether
the
U46
(4051)
circuit
is
welded
normally
and
PIN3
cannot
output
signals,
then
replace
the
4051.
33
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