Korg EX-800 User manual
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■
■
1
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KORG
KORG
PROGRAMMABLE
POLYPHONIC
SYNTHE
MODULES
H
CONTENTS
1.
SPECIFICATIONS
1
2.
MIDI
IMPLEMENTATION
2
3.
STRUCTURAL
DIAGRAM
5
4.
BLOCK
DIAGRAM
7
5.
CIRCUIT
DIAGRAM
.'
8
6.
PC
BOARD
11
7.
CIRCUIT
DESCRIPTIONS
14
8.
TROUBLESHOOTING
TABLE
16
9.
CHECK
AND
ADJUSTMENT
PROCEDURE
17
10.
PARTS
LIST
19
II
KEIO
ELECTRONIC
LABORATORY
CORPORATION
TOKYO/JAPAN
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1.
SPECIFICATIONS
•
Voice
8
Voice
(WHOLE
mode)
4
Voice
(DOUBLE
mode)
•
DCO
1
Octave
(LOW,
MID,
HIGH),
Waveform
(
K.n),
16'
8'
4'
2'
(ON/OFF)
Level
(0
-
31)
•
DCO
2
Octave
(LOW,
MID,
HIGH),
Waveform
(
K,
n).
16'
8'
4'
2'
(ON/OFF)
Level
adjustment,
Interval
(0
-
12
semitones),
Detune
(-20
cent
MAX)
•
DCO
Mode
(WHOLE,
DOUBLE)
•
Noise
Level
(0
-
15)
(White
noise)
•
VCF
Cutoff
Frequency
(0
•
99),
Resonance
(0
-
15),
Keyboard
Track (OFF,
HALF,
FULL),
EG
Intensity
(0
-
15)
EG
Polarity
(\y,
/S),
Trigger
mode
(for
DEG
3
only)
(SINGLE,
MULTI)
•
Chorus
ON/OFF
•
DEG
1
Attack
time,
Decay
time,
Break
Point
(FOR
DCO
1) level,
Slope
time,
Sustain
level,
Release
time
(ALL
0
-
31).
•
DEG
2
Attack
time,
Decay
time,
Break
Point
(FOR
DCO
2)
level,
Slope
time,
Sustain
level,
Release
time
(ALL
0
-
31).
•
DEG
3
(FOR
Attack
time,
Decay
time,
Break
Point
VCF
&
NOISE)
level,
Slope
time,
Sustain
level,
Release
tirne
(ALL
0
-
31).
•
MG
Frequency,
Delay
time,
DCO
intensi
ty,
VCF
intensity
(ALL
0
-
15).
•
MIDI
Receive
Channel
(1
-
16),
Program
Change
(ENABLE/DISABLE),
Se
quencer
Clock
(INT,
EXT),
Bend
(IN
TENSITY)
•
TUNE
+/-50
cents
•
Key
data
receiv-
Ci~Ce/61
keys
(36-96
at
MIDI)
able
range
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2.
MIDI
IMPLEMENTATION
n
a
1
Transmission
data
Transmittable
data
consist
of
system
exclusive
messages
only.
These
are
used
for
the
computer
dump
function.
System
Exclusive
Messages
NOTE:
1.
Data
error
message
is
sent
if
there
is
a
check
sum
er
ror
during
memory
load.
Error
message:
(F0h,
42h,
21
h.
01
h,
20h,
F7h)
2.
The
request
sent
by
the
computer
must
be:
F0h,
42h,
21
h,
01
h,
10h,
F7h (where
V
means
hexadecimal).
Memory
data
is
then
output
in
the
order:
F0h,
42h,
21
h,
01
h,
memory
data
check
sum,
F7h
—
2
Reception
data
Channel
Messages
NOTE:
1.
CHANNEL
NUMBER:
nnnn
=
0H-FH
(ch1
y-ch16)
2.
NOTE
NUMBER:
kkkkkkk
=
36~96
If
received
data
is
outside
of
this
range,
it
will
be
trans
posed
to
nearest
note
of
the
same
name.
3.
Negative
numbers
are
ignored.
4.
OMNI
ON/OFF
is
always
interpreted
as
being
accom
panied
by
POLY-ON.
Separate
POLY-ON
or
MONO-ON
messages
are
ignored.
5.
ppppppp
=
0~127
(PROGRAM
NUMBER)
However,
if
number
exceeds
63
then
subtract
64
to
find
value
as
interpreted.
Example:
74
=
10
64
=
0
6.
VOLUME
CONTROL:
vvvvvvv
=
7Fm
is
the
loudest
volume.
decreases
as
value
approaches
OOh.
System
Real
Time
Messages
Volume
CAUTION:
ACTIVE
SENSING
If
FEh
(STATUS
11111110)
is
ever
received,
then
another
FEh
or
other
MIDI
data
must
be
received
every
300ms,
otherwise
the voices
will
be
turned
off.
If
FEh
is
never
received
then
operation
will
continue
as
usual.
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i
System
Exclusive
Messages
NOTE:
1.
EX-800
begins
RAM
data
dump
about
300msec
after
it
receives
the
final
F7Hin
the
RAM
data
request
above.
2.
£"
(One word
of
RAM
data)n
Least
significant
8
bits
""
are
used
for
check
sum.
3.
Send
data
to
EX-800
MIDI
IN
in
the
order:
F0h,
42h,
21h, 01h,
memory
data
check
sum,
F7h,
In
ternal.
RAM
Data
Chart
NOTE:
1.
SEQ
DATA
is
as
shown
below.
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EXAMPLE:
DC
DATA:
B4h,
02h,
B5h,
02h,
01h,
01h,
B7h,
B9h,
34h,
37h,
BCh,
02h,
02h,
02h,
02h,
02h,
01
h,
01
h,
OOh
2.
CHORD
MEMORY
0
knknkokaknknkn:
KEY
DATA
00000
000:
END
3.
Important:
EX-800
does
not
use
undefined
data
except
for
check
sum.
Panel
Control
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Program
Parameter
per
ONE
note
y////////
'UNDEFINED
////////A
PRAMETER
WITH
^EXCEEDS
BYTE
UNIT.
NO
SPACE
BETWEEN
NOTES
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