Korg M-500 User manual

OWNER’S MANUAL
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micro-preset
synthesizer m-soo

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■ On Synthesizers
Switch on the radio or the TV, music by synthesizers
is commonplace not only in music programs but also
as commercial background music and drama theme
music.
You could say that we are surrounded by synthesized
sound.
Then, why has the synthesizer become so popular?
In a word, it is because the synthesizer can imitate the
sounds of the existing musical instruments and
produce unique sounds which no one else has ever
used.
Generally, the synthesizer is a monophonic instrument
for playing melodics. This means that the synthesizer
has the features that it can freely change tones and
sounds, and continuously change tunes.
As a result of technological progress, a polyphonic
synthesizer capable of producing chords is now
available, through at a very high price; and an in¬
creasing baricty of synthesizers are on the market,
(see photo)
The synthesizer can produce sounds by connection
to an electronic organ, stereo set or guitar amplifier
(preferably a keyboard amplifier). And the effects can
be doubled by connecting an echo machine, phase
shifter (KORG Mr.Multi). or a volume pedal
(KORG 2 - channel) between them.
(1)

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■ Main Features
ll K a revolutionary, compact synthesizer itui can Ik used b> a wide range of musk
lovers from amatcm electronic organ players lo professional Keyboard ariisiv
li has long been hclicscd that ii is difficult and complex to play a synthesizer,
The new KORG Mtcro^preset synthesizer is not only simple loplay but. thanks to 1C
technology, has all the functions of a synthest/rr in compact form.
With ihe belief that knobs on the operation panel of a synthesizer arc part of the
keyboard, we hase designed the operation panel to be as compact as possible so that
the player may be able to operate all the knobs with little need of moving his hand,
we are sure that you will be fully satisfied with the sounds you produce with this new
KORG Micro-preset svnthcsizcr
Main Features
I This KORG Micro-preset Synthesizer can mix preset sounds by means of
depressing more than two preset select switches at the same time.
This means that it can produce a greater variety of sounds than the conventional
preset type synthesizer.
2. Such effect knobs as TRAVELER. MODULATION DEPTH and PORAMKNTO
are located together in the lower part of the panel so they out be operated freely
with the left hand alone.
3. The new KORG Micro-preset synthesizer is small in size and light in weight
because its circuitry' consists of ICs.
This enables you to play the synthesizer in a standing posture by hanging it from
your shoulder with a strap.
4. Once the KORG Micro-preset is tuned after a is switched ON.it is ready for
playing in tunc always. This is very important for a synthesizer which is often
played with an electronic organ or other musical instruments, but there have been
few synthesizer which meet this condition.
2 )

■ Operation Panel Description

■ Effect of Switches
Power Switch:
tuning ihe knob dockwne wilt the power oo and mercate
volume pilot lamp will light.
Pilch:
Portamento:
Portamento Switch:
Traveler:
Adjuti the pitch for tuning with other inttrumcnii.
One note on the keyboard can be cotuinuoutly connected
with the next one pUvrd If It it used long, art unrealistic
tone it produced; and if it it uted thort. it can effect r»rty
produce (he coundt of the trombone or vtohn
lantlCVTMY PORTAMENTO effect conltmict at long
at thit twitch it an, bwi censes when n it
I relented.
□ PORTAMENTO doet not work at ilie
V center portion,
Hiarturxm «t\ PORTAMENTO effect ttays on.
A wide-range tone control knob whtch workt onl) with
SYNTHI ». SYNTME-2 and BRASS It perm.ic unre
alivtK tonal changet peculiar to a tyniheti/cr.and fine
bratt etpretuont.
Standard tone at the center potition.
Vibrato Switch
Modulation Depth:
raavti- A tpecial vibrato effect umiUr to the
vbmato tont produced when the TRAVELER
knob it moved to the right and lefe.
Workt only wnh SYNTHE-I, STNTHt-2.
C a nd BRASS
VIBRATO doer not work at the center
position
v***To.Change the tntervaU periodically to
make the sounds etpeessive. Depress the
key, and Vibrato workt thonly Later
Control knob for adjusting the DEPTH of vibrato and
travel vibrato.
Repeat Switch:
Modulation Rate
Attack:
Sustain
s tvtioM-A non-cycfic repeal Is obtained at the
atrEAT tpeed elected with the MODULATION
O R ATE knob.
-REPEAT does not work at tht center
poaition
■ MAT A tound it repeated periodically.
Control knob foe adjusting the speed of VIBRATO,
TRAVEL VlBRATO.RFPEATand RANDOM REPEAT
Control knob for adjusting attack time. Works only wttb
SYNTHE 2
Control knob foe adjusting after sound duratton. Works
only with SYNTHE-I and SYNTHE-2.
■ Preset Note
•yrithe I •ynthe 2
■ PRESET NOTES
BRASS Saw-Tootli
IV wir rftret at TRAVtl 1 R
im* it prudiKtO in durst t*«r*Niiun
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STRING
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WOOD
Square
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VOICE
| Saw-Tooth
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IPiicti Brad effect 1
( 6 )

■ Before Use
I. Avod using ihe Inurnment new a healer or a wove. and keep ii away from exposure 10
direct sunlight, much moisture, dust and vibration.
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2. Avoid using it new a neon lamp, fluorescent light, transformer, or mo*or because the
synthesizer may pick up noise.
■ Connecting Method
To use ihe Micro-preset, it must be connected 10 an electrical outlet.
Connect the power cord from tlic rear panel into an electrical outlet.
Then connect that end of the accessory shielded cord which has no adapter
to the rear panel's out jack.
Connect it to the H (high) jack in case of using an electronic organ or
stereo amplifier: t>r to the L flow) jack in case of using a guitar amplifier or
a PA system amplifier.
When connecting it to an amplifier hasing a pin connector, remove the
adapter from the shielded cord end. and use tlic pin plug on the cord end.
When using the volume pedal, connect the pedal and then connect it to an
amplifier in tlic manner mentioned below .
■ T > ~7 & £* t ■ Examples of connection to amplifier, etc.
( 7 )

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NEW SOUNDS wi«k
KORG
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KEIO ELECTRONIC LABORATORY CORP.
TOKYO. JAPAN

OWNER S MANUAL
am micro-preset spumta-M-soosp
IMPORTANT
■ The wires in the mains lead fitted to this equipment are
coloured coded as follows:
BLUE - NEUTRAL
BROWN - LIVE
GREEN/YELLOW - EARTH
You are advised to fit a 3-pin plug to the lead, wiring the BLUE wire to the
NEUTRAL terminal marked M N" in the plug, the BROWN wire to the UVE
terminal marked “L", and the GREEN/YELLOW wire to the terminal marked
by the letter “E” or by the safety Earth symbol -A- . The plug must incorpo¬
rate a 3amp fuse.
WARNING - This apparatus MUST be earthed!
■ HOW TO USE THE MICRO-PRESET WITH BUILT-IN
SPEAKER M-500SP
1) A compact amp and speaker are built right into the M-SOOSP so you can
play it anytime by just plugging in the power cord. Output is 600mW
so you have plenty of volume for performance even without an external
amp See figure I.
2) To listen to the M-SOOSP with headphones, plug the headphones into the
headphone jack. When headphones are plugged in. the speaker is auto¬
matically switched off. See figure 2. For best results, be sure to use head¬
phones rated at 8ft.
3) Use the connecting cord supplied to attach external amplification equip¬
ment. as described on page 7. However, for the model M-SOOSP. only con¬
nect the cord to the rear panel socket marked “High”.
KEIO ELECTRONIC LAB.. CORP. Tokyo. Japan
ft* urtM

E55Q MODIFICATION PROCEDURE: "Warbling" or "Chirping" problem and
excess chorus noise.
1. Unpack unit. Leave plastic spread out as protection.
2. Carefully remove four top bolts and two side bolts.
3. Swing up top part (Ud) of unit. Prop the lid against something that
won^t scratch St. There Is one hook attached to each side of the back,
of the lid. Rest only the left-hand hook on the top rear metal edge
of the bottom part of the unit (lid will lean to the right!. This
protects the wiring on the left from stress. Be careful not to pinch
these wl res.
4 . Carefully unplug four connectors from KUt-214 board (brown board at
lower left of iid part). (See diagram, pg.,2).
5. Carefully unplug two 9-pln connectors from bottom part of KLM-I84 board
(green board directly above KLM-214). (See diagram, pg. 2).
b. Unscrew four woodscrews with elastic washers from KLM-214 board and
carefully remove board.
7. On the solder side of KLM-ZI4 board, add two .015 UF/50V or better
IQS tolerance poly caps as follows. Both capacitors should be laid
flat against the board. (See diagram A).
a. Solder one cap between traces connected to pins I and 3 of
IC4. 00 MOT SOLDER DIRECTLY TO PINS OF 1C4.
b. Solder remaining cap In parallel w/R20B (solder side).
d. Remove IC6 from KLM-2U board (use Soder-wick or vacuum-type tool).
Replace with one piece TL-072 type opamp (T.I.).
9. Re-install KLM-214 board using four woodscrews with plastic washers.
Observe orientations: "KORG 1 1 label and connectors are at top of
board (KLM-1B4 board Is upside down).
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10. Re-attach four connectors to KLM-214 board (see diagram).
Connector flanges on the top .
Flange —
5 pin colored wires
6 pin colored
wires
3 pin
5 pin gray wires
11. Re-attach two connectors to KLM-I84 board I see diagram).
Connector fIanges on the bottom .
9 pin purpi0 wI res
9 pin multicolor wires
12. On KLM-IQ4 board, solder one 18cm £lfi ga. grounding wTre between the
right hand mounting tab for the "PERCUSSIVE*' tone pot and the Spot
marked ,T GND" about 3cm to the left of the lower righ+hand 9 pin
connector. On both this and the following step, tin separately the
bare wire ends and the board locations described, then solder together.
(See dlagram B).
13, Solder one 4cm £lfl ga. grounding between the spot marked "GMD 1 ' described
on (12) above (KIM-184) and the left hand end of J4 on KLM-214 board.
14. T h i s connpfetes the modifications. Swing the lid back down. &e careful
that no wires are pinched and that the two side tabs on the control
panel slide smoothly into the bottom chassis without catching.
lb. Carefully re-Install the four top bolts with metal cupwashers and the
two side bolts with plastic washers. Center the lid before gently
tightening bolts,
16. Listen to unit, Make sure that problem Is corrected and everything
fs working fine.
Unicord.
o DMSfon or Gulf + Webern Mtmuiociuring comoonv
fro)! Skeef. wmtCHuiy. N.V 115^

KLM-125

,015 UF l 50V
1 035 Poly Capacitor
DIAGRAM A
Unicord.
o DMjlon of Gulf + Webern MonuibOuring Company
B9 hoi\ Sire&r, WesftHjry, NY. 11590