CHD Elektroservis KM500-KBD User manual

KM500
KM500KM500
KM500-
--
-KBD
KBDKBD
KBD
MIDI Interface for
MIDI Interface forMIDI Interface for
MIDI Interface for
Korg M500 Micro
Korg M500 MicroKorg M500 Micro
Korg M500 Micro-
--
-Preset Keyboard
Preset KeyboardPreset Keyboard
Preset Keyboard
Model 8
Model 8Model 8
Model 8-
--
-428
428428
428
Version 1.0
Version 1.0Version 1.0
Version 1.0
Installation Manual
Installation ManualInstallation Manual
Installation Manual
© 2019 CHD Elektroservis
© 2019 CHD Elektroservis© 2019 CHD Elektroservis
© 2019 CHD Elektroservis

Korg M500 MIDI Interface
Korg M500 MIDI InterfaceKorg M500 MIDI Interface
Korg M500 MIDI Interface
KM500
KM500 KM500
KM500-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-428 / v. 1.00
428 / v. 1.00428 / v. 1.00
428 / v. 1.00
Copyright © 2019 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
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Contents:
Contents:Contents:
Contents:
1
11
1
GENERAL INFORMATION
GENERAL INFORMATIONGENERAL INFORMATION
GENERAL INFORMATION ................................
................................................................
................................................................
................................................................
................................................................
................................................................
................................................................
................................................................
................................ 3
33
3
1.1 MIDI INTERFACE KIT PARTS............................................................................................................................. 3
2
22
2 MIDI INTERFACE INSTALLATION
MIDI INTERFACE INSTALLATIONMIDI INTERFACE INSTALLATION
MIDI INTERFACE INSTALLATION ................................
................................................................
................................................................
................................................................
................................................................
................................................................
.......................................................
..............................................
....................... 4
44
4
2.1 OPEN THE INSTRUMENT................................................................................................................................. 4
2.2 HOLES FOR MIDI SOCKETS DRILLING................................................................................................................ 5
2.3 MIDI SOCKETS MOUNTING ............................................................................................................................. 6
2.4 HOLES FOR BUTTON AND INDICATION LED DRILLING ......................................................................................... 6
2.5 BUTTON AND INDICATION LED MOUNTING ...................................................................................................... 7
2.6 POWER SUPPLY CABLE MOUNTING.................................................................................................................. 7
2.7 KEYBOARD CONTROL SIGNALS CABLE MOUNTING............................................................................................. 8
2.8 THE INTERFACE BOARD MOUNTING ................................................................................................................ 9
2.9 INTERFACE ADJUSTMENT ............................................................................................................................. 11
2.10 FINISHING OF THE INSTALLATION.................................................................................................................. 12
3
33
3 INSTALLATION TIPS
INSTALLATION TIPSINSTALLATION TIPS
INSTALLATION TIPS ................................
................................................................
................................................................
................................................................
................................................................
................................................................
................................................................
................................................................
......................................
............
...... 14
1414
14
3.1 USAGE OF MIDI – THRU/OUT OUTPUT ........................................................................................................... 14
3.2 ALTERNATIVE PLACEMENT OF MIDI SOCKETS.................................................................................................. 14
3.3 RESET BUTTON AND INDICATION LED ............................................................................................................ 14

Korg M500 MIDI Interface
Korg M500 MIDI InterfaceKorg M500 MIDI Interface
Korg M500 MIDI Interface
KM500
KM500 KM500
KM500-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
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8-
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1
11
1
GENERAL INFORMATION GENERAL INFORMATIONGENERAL INFORMATION
GENERAL INFORMATION
Figure 1.1
Figure 1.1 Figure 1.1
Figure 1.1 –
––
– Connection to instrument circuits
Connection to instrument circuits Connection to instrument circuits
Connection to instrument circuits
KM500-KBD MIDI interface controls VCO and GATE
generator of the Korg M500 (Micro-Preset)
synthesizer. Simplified block schematics of the
interface installation in the instrument shows fig. 1.1.
The interface board looks very similarly for Korg 770,
700S, 900PS and M500 but there are a differences in
some components. It is recommended to check if you
have the correct model. The instrument model
identification label on the interface board (see fig. 1.2)
specifies the Korg instrument type: K770 is interface
for Korg 770, 700S and 900PS, KM500 is interface for
Korg M500 Micro-Preset.
Figure 1.2
Figure 1.2 Figure 1.2
Figure 1.2 –
––
– Identification labels
Identification labels Identification labels
Identification labels
The interface firmware can be revised. Actual version of the
firmware is printed on the identification label on the interface’s
processor (see fig. 1.2). It is also possible to read the actual
version of firmware from the interface by MIDI System Exclusive
message.
1.1
1.11.1
1.1
MIDI INTERFACE KIT PARTS MIDI INTERFACE KIT PARTSMIDI INTERFACE KIT PARTS
MIDI INTERFACE KIT PARTS
MIDI interface kit contents all necessary parts for installation
incl. all support and coupling elements. The delivery also
includes both installation and operation manuals in printed
form. Please check if the delivery is complete before the
installation (see fig. 1.1.1).
Figure 1.1.1
Figure 1.1.1 Figure 1.1.1
Figure 1.1.1 –
––
– Parts of the interface kit
Parts of the interface kit Parts of the interface kit
Parts of the interface kit
The KM500-KBD interface kit
delivery contents:
(1) MIDI Interface board
(2) Bunched cables of keyboard
control signals
(3) Bunched cables with button
and LED
(4) Bunched cables for power
supply
(5) 2x DIN-5 socket with cable
(6) Coupling elements (LED
holder, supports, self-tapping
screws, insulation tube and
tightening strips)
(7) Owner’s and Installation
manuals in printed form

Korg M500 MIDI Interface
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Korg M500 MIDI Interface
KM500
KM500 KM500
KM500-
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-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
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2
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2
MIDI INTERFACE INSTALLATION MIDI INTERFACE INSTALLATIONMIDI INTERFACE INSTALLATION
MIDI INTERFACE INSTALLATION
Mounting the interface in the Korg M500 synthesizer is very easy. If you follow the instructions from this
manual, there should be no major problems during the installation. The interface installation procedure is
thoroughly described in the following chapters. Please follow these instructions accurately to avoid any damage
of the instrument.
Attention! Disconnect the instrument form the mains prior to the installation. There is a risk of the
Attention! Disconnect the instrument form the mains prior to the installation. There is a risk of the Attention! Disconnect the instrument form the mains prior to the installation. There is a risk of the
Attention! Disconnect the instrument form the mains prior to the installation. There is a risk of the
electric shock!
electric shock!electric shock!
electric shock!
Attention! Observe precautions for handling electrostatic discharge sen
Attention! Observe precautions for handling electrostatic discharge senAttention! Observe precautions for handling electrostatic discharge sen
Attention! Observe precautions for handling electrostatic discharge sensitive devices!
sitive devices!sitive devices!
sitive devices!
The producer is not responsible for any eventual mechanical or electrical damage of the Korg
The producer is not responsible for any eventual mechanical or electrical damage of the Korg The producer is not responsible for any eventual mechanical or electrical damage of the Korg
The producer is not responsible for any eventual mechanical or electrical damage of the Korg
instrument caused by the infringement of the described installation procedure or by careless
instrument caused by the infringement of the described installation procedure or by careless instrument caused by the infringement of the described installation procedure or by careless
instrument caused by the infringement of the described installation procedure or by careless
manipulation during the installation of the MIDI int
manipulation during the installation of the MIDI intmanipulation during the installation of the MIDI int
manipulation during the installation of the MIDI interface!
erface!erface!
erface!
It is recommended to calibrate the instrument accordingly to the instructions in service manual of the
It is recommended to calibrate the instrument accordingly to the instructions in service manual of the It is recommended to calibrate the instrument accordingly to the instructions in service manual of the
It is recommended to calibrate the instrument accordingly to the instructions in service manual of the
instrument prior the interface installation. This ensures trouble
instrument prior the interface installation. This ensures troubleinstrument prior the interface installation. This ensures trouble
instrument prior the interface installation. This ensures trouble-
--
-free operation of the interface.
free operation of the interface.free operation of the interface.
free operation of the interface.
2.1
2.12.1
2.1
OPEN THE INSTRUMENT OPEN THE INSTRUMENTOPEN THE INSTRUMENT
OPEN THE INSTRUMENT
Please keep all original screws and washers removed during the instrument opening procedure described in
paragraphs below. They will be used again after the MIDI kit installation is finished.
a) Unscrew six screws on the bottom side of the instrument (fig. 2.1.1). Flip top part of the instrument back (fig.
2.1.2). All instrument’s parts and boards needed for the interface installation are now accessible (fig. 2.1.3).
Figure 2.1.1
Figure 2.1.1Figure 2.1.1
Figure 2.1.1
Figure 2.1.2 Figure 2.1.2Figure 2.1.2
Figure 2.1.2
Figure 2.1.3
Figure 2.1.3Figure 2.1.3
Figure 2.1.3
c) Unplug keyboard cable
from the “S2” connector
on KLM59d board (fig.
2.1.3). Unplugging the
cable enables easier
manipulation with the
instrument during the
next installation
procedures.

Korg M500 MIDI Interface
Korg M500 MIDI InterfaceKorg M500 MIDI Interface
Korg M500 MIDI Interface
KM500
KM500 KM500
KM500-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
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2.2
2.22.2
2.2
DRILLING HOLES FOR MIDI SOCKETS DRILLING HOLES FOR MIDI SOCKETSDRILLING HOLES FOR MIDI SOCKETS
DRILLING HOLES FOR MIDI SOCKETS
The interface has both MIDI input and output. Only MIDI input is necessary for the basic interface operation.
MIDI output has not to be installed – see chapter 3.1. Nevertheless, having both MIDI input and output (MIDI-IN
and MIDI-THRU/OUT sockets) is more convenient for an easy integration in the more advanced MIDI system.
a) The best place for the MIDI sockets montage is on the rear side of the top wood panel of the instrument (fig.
2.2.1). Alternatively, the sockets can be placed on left side of top panel – see chapter 3.2.
Figure 2.2.
Figure 2.2.Figure 2.2.
Figure 2.2.1
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1
Figure 2.2.2
Figure 2.2.2Figure 2.2.2
Figure 2.2.2
Figure 2.2.3
Figure 2.2.3Figure 2.2.3
Figure 2.2.3
b) Drill two holes with diameter 16 mm to the rear
panel of the instrument as shown on fig. 2.2.2 (all
dimensions are in mm). Use special flat drill (V-drill for
wood) and work carefully
work carefullywork carefully
work carefully so that the cover is not
scratched or splitted off and other parts of the
instrument are not damaged!
c) Make small holes (labeled by crosses on fig. 2.2.2)
for the self-tapping screws by very small drill (diameter
cca 1 mm) or by a thick needle (fig. 2.2.3).
c) Clean the edge of the holes with small file or tip of
bigger drill after the holes are drilled. Clean all sawdust
and raspings from the inside of the instruments, they
can cause a malfunction if left inside the instrument!

Korg M500 MIDI Interface
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Korg M500 MIDI Interface
KM500
KM500 KM500
KM500-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
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2.3
2.32.3
2.3
MIDI SOCKETS MOUNTING MIDI SOCKETS MOUNTINGMIDI SOCKETS MOUNTING
MIDI SOCKETS MOUNTING
a) Pull flat connectors of MIDI cables (from the interface accessory) through the holes in the instrument’s rear
panel from outer side and insert DIN sockets into the holes (pic. 2.3.1). Both MIDI cables are identical and they
can be swapped.
b) Fix DIN sockets to the panel using four self tapping screws from the interface accessory (pic. 2.3.2).
c) It is recommended to label the DIN sockets ("MIDI IN", "MIDI THRU/OUT" for example) with self-adhesive foil
glued near the sockets (fig. 2.10.5 in chapter 2.10).
Figure 2.3.1
Figure 2.3.1 Figure 2.3.1
Figure 2.3.1
Figure 2.3.2 Figure 2.3.2 Figure 2.3.2
Figure 2.3.2
Cable
Instrument's
rear panel
DIN
socket Self-tapping
scre
w
2.4
2.42.4
2.4
DRILLING HOLES FOR BUTTON AND INDICATION LED DRILLING HOLES FOR BUTTON AND INDICATION LEDDRILLING HOLES FOR BUTTON AND INDICATION LED
DRILLING HOLES FOR BUTTON AND INDICATION LED
Figure 2.4.2
Figure 2.4.2Figure 2.4.2
Figure 2.4.2
There are two control elements on the interface -
button and bi-color LED. They are not necessary for the
interface operation, so they need not to be installed (if
you prefer to maintain the vintage status of the
instrument) – see chapter 3.3. Nevertheless having
both of them installed is more convenient for easier
device control.
Figure 2.4.1
Figure 2.4.1Figure 2.4.1
Figure 2.4.1
a) If you decide to install the LED and the button, the
suitable place for them is on small panel on the left
side of the instrument’s keyboard (fig. 2.4.1). In that
case, you have to drill two holes in the panel as shown
on fig. 2.4.2 (all dimensions are in mm).

Korg M500 MIDI Interface
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Korg M500 MIDI Interface
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b) Drill one hole with diameter 7 mm (for RESET button) and one hole with diameter 6,5 mm (for indication
LED) to the panel – see pic. 2.4.2. Use sharp drills and work carefully
work carefullywork carefully
work carefully so that the panel is not scratched during
the drilling!
c) Clean the edge of all holes with small file or with tip of bigger drill after the holes are drilled. Clean all
sawdust and raspings from the inside of the instruments, they can cause a malfunction if left inside the
instrument!
2.5
2.52.5
2.5
BUTTON AND INDICATION LED MOUNTING BUTTON AND INDICATION LED MOUNTINGBUTTON AND INDICATION LED MOUNTING
BUTTON AND INDICATION LED MOUNTING
a) Insert LED holder (from the interface accessory) into 6,5 mm hole in the instrument’s top panel from the
outer side. Pull the lock ring of the LED holder over the supplied LED (fig. 2.5.1).
b) Insert the LED into the holder (from inner side of the instrument’s panel) and fix it by the overthrust of the
lock ring on the holder (fig. 2.5.2).
Figure 2.5.1
Figure 2.5.1 Figure 2.5.1
Figure 2.5.1
Figure 2.5.2 Figure 2.5.2 Figure 2.5.2
Figure 2.5.2
c) Insert button into 7 mm hole in the instrument’s panel from inner side (fig. 2.5.3).
d) Fix the button to the panel with the spring washer and nut (fig. 2.5.4).
Figure 2.5.3
Figure 2.5.3 Figure 2.5.3
Figure 2.5.3
Figure 2.5.4 Figure 2.5.4 Figure 2.5.4
Figure 2.5.4
2.6
2.62.6
2.6
POWER SUPPLY CABLE MOUNTING POWER SUPPLY CABLE MOUNTINGPOWER SUPPLY CABLE MOUNTING
POWER SUPPLY CABLE MOUNTING
The power supply cable from the interface accessory is fitted with 3-pin flat connector (fig. 2.6.1). Wires
outgoing from this connector must be connected (soldered) to leads of IC1 and IC2 on the instrument’s KLM59d
board (fig. 2.6.2). Work carefully
Work carefullyWork carefully
Work carefully during next procedures
during next procedures during next procedures
during next procedures since the IC1 and IC2 are less accessible.
Figure 2.6.1
Figure 2.6.1Figure 2.6.1
Figure 2.6.1

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Figure 2.6.2
Figure 2.6.2Figure 2.6.2
Figure 2.6.2
a) Solder the black wire Nr. 2 “GND“ to ground (left
pin) of the IC2 (fig. 2.6.3).
b) Solder the blue wire Nr. 1 “-12V“ to output (right
pin) of the IC2 (fig. 2.6.3).
c) Solder the red wire Nr. 3 “+12V“ to output (upper
pin) of the IC1 (fig. 2.6.4).
d) Check the soldering quality - if a short connection to
the other pins of IC1 / IC2 didn't occur!
Figure 2.6.3
Figure 2.6.3Figure 2.6.3
Figure 2.6.3
Figure 2.6.4 Figure 2.6.4Figure 2.6.4
Figure 2.6.4
2.7
2.72.7
2.7
KEYBOARD CONTROL SIGNALS CABLE MOUNTING KEYBOARD CONTROL SIGNALS CABLE MOUNTINGKEYBOARD CONTROL SIGNALS CABLE MOUNTING
KEYBOARD CONTROL SIGNALS CABLE MOUNTING
The keyboard control signals cable from the interface accessory is fitted with 4-pin flat connector (fig. 2.7.1).
Wires outgoing from this connector must be connected to the instrument’s keyboard and between the
instrument’s keyboard and the KLM59d board (fig. 2.7.2 and fig. 1.1 in chapter 1).
Figure 2.7.1
Figure 2.7.1Figure 2.7.1
Figure 2.7.1
Figure. 2.7.2
Figure. 2.7.2Figure. 2.7.2
Figure. 2.7.2

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a) Unsolder the orange wire (leads from the KLM59d board, signed 2SA) from soldering pad on the instrument’s
keyboard (fig. 2.7.3).
b) Place heat-shrink insulation tube
φ 2 mm (from the interface accessory) on yellow wire Nr. 2 “OUT” of the
keyboard control signals cable (fig. 2.7.3).
c) Solder the yellow wire to the orange wire freed from the soldering pad on the keyboard. Isolate the
connection with the insulation tube and heat it (with a hot-flue pistol for example) until it shrinks tightly to the
cables (fig. 2.7.4).
Figure 2.7.3
Figure 2.7.3Figure 2.7.3
Figure 2.7.3
Figure 2.7.4 Figure 2.7.4Figure 2.7.4
Figure 2.7.4
d) Solder green wire Nr. 1 “IN” of the interface cable to the freed soldering pad on the instrument’s keyboard
(fig. 2.7.5).
e) Solder black wire Nr. 4 “GND“ of the interface cable to pad on the instrument’s keyboard where a black wire ,
(leads from the KLM59d board, signed 2SC) is already soldered (fig. 2.7.5).
f) Solder red wire Nr. 3 “REF“ of the interface cable to pad on the instrument’s keyboard where a brown wire
(leads from the KLM59d board, signed 2SB) is already soldered (fig. 2.7.5).
Figure. 2.
Figure. 2.Figure. 2.
Figure. 2.7.5
7.57.5
7.5
2.8
2.82.8
2.8
THE INTERFACE BOARD MOUNTING THE INTERFACE BOARD MOUNTINGTHE INTERFACE BOARD MOUNTING
THE INTERFACE BOARD MOUNTING
a) The interface board will be placed on the bottom wood cover of the instrument – to the left of the keyboard
(fig. 2.8.1).
b) Put the interface board to the instrument’s bottom plate so that the board side with two connectors X4
(“KBD”) and X5 (“PWR”) points to the right, towards the keyboard as shown on the figure 2.8.2. Insert four
plastic distance supports from the interface accessory under the holes on the interface board.

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Figure 2.8.1
Figure 2.8.1Figure 2.8.1
Figure 2.8.1
Figure 2.8.2 Figure 2.8.2Figure 2.8.2
Figure 2.8.2
c) Fix the interface board to the bottom plate of the instrument using four self tapping screws from the
interface accessory (pic. 2.8.3). Make small holes for the self-tapping screws before - by very small drill
(diameter cca 1 mm) or by a thick needle (fig. 2.8.4).
Pic. 2.8.3 Pic. 2.8.3 Pic. 2.8.3
Pic. 2.8.3
Pic. 2.8.4 Pic. 2.8.4Pic. 2.8.4
Pic. 2.8.4
d) Plug the 3-pin connector of the bunched cables lead from the power supply pads (IC1 and IC2) on KLM59d
board to X5 (“PWR”) plug head on the interface board. Orientation of the connector is given by the connector
lock so it cannot be plugged reversely (fig. 2.8.5).
e) Plug 4-pin connector of the bunched cables lead from keyboard to X4 (“KBD”) plug head on the interface
board. Orientation of the connector is given by the connector lock again (fig. 2.8.5).
f) Plug two 3-pin connectors of the MIDI cables to X1 (“I”) and X2 (“O”) plug heads on the interface board.
Orientation of the connectors is given by the connector lock again but be sure that the connectors are not
exchanged: MIDI input must be plugged to X1 head and MIDI output to X2 head (fig. 2.8.5).
Figure 2.8.5
Figure 2.8.5Figure 2.8.5
Figure 2.8.5

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g) Plug the 4-pin connector of the bunched cables (lead from button and LED mounted on top panel) to X3
(“CTRL”) plug head on the interface board. Orientation of the connector is given by the connector lock again
(fig. 2.8.5).
h) Plug original keyboard cable to the “2S” connector on instrument’s KLM59d board (return it to its original
position - fig. 2.8.6).
i) Align newly installed cables and fix them together with plastic stripes from the interface accessory (fig. 2.8.6).
Figure 2.8.6
Figure 2.8.6Figure 2.8.6
Figure 2.8.6
2.9
2.92.9
2.9
INTERFACE ADJUSTMENT INTERFACE ADJUSTMENTINTERFACE ADJUSTMENT
INTERFACE ADJUSTMENT
Figure 2.9.1
Figure 2.9.1Figure 2.9.1
Figure 2.9.1
There are two variable resistors on the interface board
labeled “OFFSET” and “RANGE” (fig. 2.9.1). They must be
adjusted before the interface is used. Adjustment
procedure is following:
a) Connect MIDI output of your MIDI master keyboard (or
PC / sequencer / DAW) to MIDI input of the interface
1
11
1
.
b) Connect “HIGH” audio output of the instrument to a
tuner or to a frequency meter.
c) Set all controllers on the instrument’s panels to a clear
sound without any modulation:
• PITCH knob Æ to 0
00
0 (middle position)
• VIBRATO switch Æ to OFF OFFOFF
OFF (middle position)
• REPEAT switch Æ to OFF OFFOFF
OFF (middle position)
• TONE rotary selector Æ to 4’ 4’4’
4’ (second position from top)
• TONE switch selector Æ to WOOD
WOODWOOD
WOOD (i.e. FLUTE tone is selected)
• PORTAMENTO switch Æ to OFF OFFOFF
OFF (middle position)
Positions of all other controllers on instrument’s panel are not significant.
1
Set transmit MIDI Channel to number 1 on the master keyboard.

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KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
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-428 / v. 1.00
428 / v. 1.00428 / v. 1.00
428 / v. 1.00
Copyright © 2019 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
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d) Plug instrument's power supply cable to a mains socket and switch the instrument on by main switch joined
with the POWER/VOLUME knob and turn the knob fully clockwise (to maximum). Attention
Attention Attention
Attention -
--
- work very carefully
work very carefully work very carefully
work very carefully
during whole adjustment procedure
during whole adjustment procedure during whole adjustment procedure
during whole adjustment procedure -
--
- there is a risk of electric shock!
there is a risk of electric shock! there is a risk of electric shock!
there is a risk of electric shock!
e) Now, the interface is in "Stand-by" mode - the interface’s indication LED is off. If not, press the "RESET"
button of the interface
2
22
2
.
f) Wait a few minutes
Wait a few minutesWait a few minutes
Wait a few minutes to stabilize the temperature of all instrument circuits.
g) Measure the voltage between pins of the "TP" jumper head (fig. 2.9.1) with a quality digital multimeter. It
should be zero volts exactly. If it is not, adjust it with "OFFSET” variable resistor on the interface board (fig.
2.9.1).
Figure 2.9.2
Figure 2.9.2Figure 2.9.2
Figure 2.9.2
h) Press the C3 key on the instrument’s keyboard (fig. 2.9.2) - indication
bi-color LED remains off.
i) Measure the output tone frequency by the tuner (frequency meter). It
should be 1047 Hz approx. Remember the measured tone frequency.
Then release the C3 key.
j) Press the C3 key on the master keyboard (i.e. send MIDI Note Nr. 84 to the interface) and hold it. The
indication LED will light in green.
k) Check the output tone frequency by the tuner (frequency meter) again. It must be the same as the frequency
measured in paragraph i). If it is not, adjust it with "RANGE” variable resistor on the interface board (fig. 2.9.1).
l) Release the C3 key on the master keyboard. Switch the instrument off and disconnect the power supply cable
disconnect the power supply cable disconnect the power supply cable
disconnect the power supply cable
from mains socket
from mains socketfrom mains socket
from mains socket.
2.10
2.102.10
2.10
FINISHING OF THE INSTALLATION FINISHING OF THE INSTALLATIONFINISHING OF THE INSTALLATION
FINISHING OF THE INSTALLATION
Now assembly both parts of the instrument together. It is a reverse procedure than described in chapter 2.1.
Use the original screws and do not forget to place the washers to their original places.
a) Place the top part of the instrument back to the bottom wood plate – to its original position (fig. 2.10.1).
b) Fix both parts of the instrument together with six original screws and washers (fig. 2.10.2).
Figure 2.10.1
Figure 2.10.1 Figure 2.10.1
Figure 2.10.1
Figure 2.10.2 Figure 2.10.2 Figure 2.10.2
Figure 2.10.2
The installation of the MIDI interface kit is now finished and the Korg M500 instrument is prepared for MIDI
communication.
Please read carefully user manual of the interface before usage of modified instrument.
Please read carefully user manual of the interface before usage of modified instrument.Please read carefully user manual of the interface before usage of modified instrument.
Please read carefully user manual of the interface before usage of modified instrument.
2
It is suppossed that the interface is in "Factory Reset" status before the adjustment procedure. If it is not, send the F0 0 0 20 21 7F 54 50 03 7F 5A
F0 00 20 21 7F 54 50 03 7F 5A F0 00 20 21 7F 54 50 03 7F 5A
F0 00 20 21 7F 54 50 03 7F 5A
F7 [hex]
F7 [hex]F7 [hex]
F7 [hex] SysEx message to the intarface first.

Korg M500 MIDI Interface
Korg M500 MIDI InterfaceKorg M500 MIDI Interface
Korg M500 MIDI Interface
KM500
KM500 KM500
KM500-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-428 / v. 1.00
428 / v. 1.00428 / v. 1.00
428 / v. 1.00
Copyright © 2019 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
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Figure 2.10.3
Figure 2.10.3Figure 2.10.3
Figure 2.10.3
Figure 2.10.4
Figure 2.10.4Figure 2.10.4
Figure 2.10.4
Figure 2.10.5
Figure 2.10.5Figure 2.10.5
Figure 2.10.5

Korg M500 MIDI Interface
Korg M500 MIDI InterfaceKorg M500 MIDI Interface
Korg M500 MIDI Interface
KM500
KM500 KM500
KM500-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-428 / v. 1.00
428 / v. 1.00428 / v. 1.00
428 / v. 1.00
Copyright © 2019 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
1
4
141
4
14
3
33
3
INSTALLATION TIPS INSTALLATION TIPSINSTALLATION TIPS
INSTALLATION TIPS
3.1
3.13.1
3.1
USAGE OF MIDI USAGE OF MIDI USAGE OF MIDI
USAGE OF MIDI –
––
– THRU/OUT OUTPUT
THRU/OUT OUTPUT THRU/OUT OUTPUT
THRU/OUT OUTPUT
Figure 3.1
Figure 3.1Figure 3.1
Figure 3.1
KM500-KBD interface has both MIDI input and output.
However, only MIDI input is necessary for basic
operation of the interface (i.e controlling the
instrument by MIDI commands). MIDI THRU/OUT
output connector needs not to be installed at all. If you
don’t require transfer of MIDI data to another MIDI
devices (THRU function ) or reverse communication of
the interface with host system (OUT function). In such
case, X2 connector (labeled “O
OO
O”) on the interface board
will remain unused (see pic. 3.1).
3.2
3.23.2
3.2
ALTERNATIVE PLACEMENT OF ALTERNATIVE PLACEMENT OF ALTERNATIVE PLACEMENT OF
ALTERNATIVE PLACEMENT OF MIDI SOCKETS
MIDI SOCKETSMIDI SOCKETS
MIDI SOCKETS
Figure 3.2
Figure 3.2Figure 3.2
Figure 3.2
Except of recommended method of the MIDI sockets
installation described in chapter 2.2, another suitable
place for the MIDI sockets placement is on the left side
of the top plastic panel (fig. 3.2).
If you do not want to mechanically damage the rear
panel of the instrument (you prefer to maintain the
vintage status of the instrument), take out the MIDI
cable(s) through a slot on the instrument cover and
replace DIN socket(s) with a cable type.
3.3
3.33.3
3.3
RESET BUT RESET BUTRESET BUT
RESET BUTTON AND INDICATION LED
TON AND INDICATION LEDTON AND INDICATION LED
TON AND INDICATION LED
Installation of the reset button and indication LED isn’t
necessary as well. You don´t need to install this
bunched cables if you don’t want to damage the
instrument’s panel by drilling. In such case, X3 connector (labeled “CTRL
CTRLCTRL
CTRL”) will remain unused (see fig. 3.1).
It is also possible to install only the indication LED on instrument’s panel. In such case, disconnect the button
from bunched cables (cut-off yellow and black wires as shown on fig. 3.3).
If the button is not installed, the interface operation is unaffected. The only limitation is that the reset of the
interface can be done only by turning the instrument off and on or by MIDI commands sent to the interface
(see user manual of the interface).
Figure 3.3
Figure 3.3Figure 3.3
Figure 3.3

Korg M500 MIDI Interface
Korg M500 MIDI InterfaceKorg M500 MIDI Interface
Korg M500 MIDI Interface
KM500
KM500 KM500
KM500-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-428 / v. 1.00
428 / v. 1.00428 / v. 1.00
428 / v. 1.00
Copyright © 2019 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
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This manual in PDF form is available at manufacturer’s web pages.
This manual in PDF form is available at manufacturer’s web pages.This manual in PDF form is available at manufacturer’s web pages.
This manual in PDF form is available at manufacturer’s web pages.
KORG M500 Micropreset MIDI Interface
Model KM500-KBD, Nr. 8-428, ver. 1.00
Document: 842810_instal
Manufacturer: CHD Elektroservis, Czech Republic
www.chd-el.cz [e-mail]