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Korg SDD-2000 Service Manual

Korg SDD-2000
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3)
Switch,
Control
Part
Pulse
signal
sent
from
Incremental
Controller
controls
Internal
Counter
of
Gate
Array
and
it
sends
Count
value
to
CPU
DATA
BUS.
Waveform
of
the
signal
sent
from
Trigger
Jack
is
shapen-
ed
at
Q1
and
at
One
shot-MuIti
of
IC1
reformed
to
pulse
wave.
LED
displaying
of
Trigger
signal
ON/OFF
is
done
by
IC1
and
Q2.
Input
signals
of
MUTE,
BYPASS,
REC
CANCEL,
PROG.
UP,
REC
TRIG
SW.
are
input
to
Gate
Array
and
sent
to
CPU
as
readable
data.
*
MIDI
signal
is
sent
to
and
controlled
by
CPU.
Tact
Switch
on
Front
Panel
is
controlled
by
CPU.
4)
CPU
CPU
connects
IC28
(Latch),
IC26
(ROM),
IC27
(RAM)
and
IC22
(Gate
Array)
through
decoder
and
controls
each
with
DATA
BUS.
IC20
Counter
HC393
devides
the
signal
(S/H)
syncro-
nizing
with
System
Clock
of
Gate
Array
and
sends
it
to
CPU
in
order
that
CPU
can
read
system
clock.
i
-20-

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Korg SDD-2000 Specifications

General IconGeneral
BrandKorg
ModelSDD-2000
CategoryRecording Equipment
LanguageEnglish

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