Korg A4 User Manual

<9.
PEAK
LED
CHECK
>
(1)
This
test
item checks
the
operation
of the
PEAK LED
and
its
light-up
status.
(2)
Set the A4’s
INPUT
volume
and
OUTPUT volume
to MAX.
(3)
Input
a
sine
wave
lkHz/
-
10dBm
to the
INPUT
jack and confirm
that the
PEAK LED
lights
red.
(4)
Input a
sine
wave
lkHz/
-
14dBm to
the
INPUT jack
and
confirm
that
the PEAK LED
lights
orange.
(5)
Input a
sine
wave
IkHz/-50dBm
to
the
INPUT
jack
and
confirm
that
the PEAK
LED
1
ights green.
(6)
Input a
sine
wave
lkHz/-70dBm
to
the
INPUT
jack
and
confirm
that
the
PEAK
LED
goes
out.
INPUT
SIGNAL
PEAK
LED
lkHz/-10dBm
lkHz/-14dBm
lkHz/-50dBm
lkHz/-70dBm
<PEAK>
lights
red
<PEAK>
lights
orange
<PEAK>
lights
green
<PEAK>
goes
out
*
The
check
items
that
follow
the
PEAK
LED
check
are
for
tests
carried
out
at
the
factory
prior to
shipment,
and
therefore
are
not
covered
here.
<10.
TEST
MODE
COMPLETION
AND
DATA
LOADING
>
(1)
Note
that
there
are
two
methods
of
ending
the
test
mode.
One
method
ends
the
mode
without
initializing
the
A4’s
data.
The
other
method
involves
loading
the
preload
data
into
the A4
and
then
ending
the
test.
(2)
Press
[MODEA]
six
times.
As
the
check
items
move
forward,
confirm
that
all
LEDs
except
PEAK
blink.
<
Ending
the
test
mode
without
initializing
the
A4’s
data
>
(3a)
Press
[MODEA].
The
test
mode
will be
ended
without
initializing
the
A4’s
data.
<
Ending
the
test
mode
by
loading
the
preload
data
>
(3b)
Press
[WRITE].
The
Preload
data
will
be
loaded into
the
A4
and
the
test
mode
will
end.
(4)
On
returning
to
the
normal
mode,
press
[PROG
EDIT]
to
confirm
that
the
preloading
has
been
performed
correctly.
Confirm
that
the
A4
GTR
LEDs
[2-
DIST/OD],
[4:
PITCH.
DELAY]
and
[5:
CHORUS/FLANGER]
are
lit,
or
that
the A4
BASS
LEDs
[1
: COMP.
DYNA
EX]
and
[2:
6
BAND
EQ]
are
lit.
17

Korg A4 Specifications

General

Brand	Korg
Model	A4
Category	Amplifier
Language	English