CHD Elektroservis K770-KBD User manual

K770
K770K770
K770-
--
-KBD
KBDKBD
KBD
MIDI Interface for
MIDI Interface forMIDI Interface for
MIDI Interface for
Korg 770 / 700S / 900PS Keyboard
Korg 770 / 700S / 900PS KeyboardKorg 770 / 700S / 900PS Keyboard
Korg 770 / 700S / 900PS Keyboard
Model 8
Model 8Model 8
Model 8-
--
-430
430430
430
Version 1.0
Version 1.0Version 1.0
Version 1.0
Installation Manual for Korg 700S
Installation Manual for Korg 700SInstallation Manual for Korg 700S
Installation Manual for Korg 700S
© 2019 CHD Elektroservis
© 2019 CHD Elektroservis© 2019 CHD Elektroservis
© 2019 CHD Elektroservis

Korg 700S MIDI Interface
Korg 700S MIDI InterfaceKorg 700S MIDI Interface
Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-430 / v. 1.00
430 / v. 1.00430 / v. 1.00
430 / 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 DRILLING HOLES FOR MIDI SOCKETS ................................................................................................................ 5
2.3 MIDI SOCKETS MOUNTING ............................................................................................................................. 6
2.4 DRILLING HOLES FOR BUTTON AND INDICATION LED ......................................................................................... 6
2.5 BUTTON AND INDICATION LED MOUNTING...................................................................................................... 7
2.6 POWER SUPPLY CABLE MOUNTING.................................................................................................................. 8
2.7 KEYBOARD CONTROL SIGNALS CABLE MOUNTING ............................................................................................. 9
2.8 THE INTERFACE BOARD MOUNTING .............................................................................................................. 10
2.9 INTERFACE ADJUSTMENT ............................................................................................................................. 11
2.10 FINISHING OF THE INSTALLATION.................................................................................................................. 12
3
33
3 INSTALLATION TIPS
INSTALLATION TIPSINSTALLATION TIPS
INSTALLATION TIPS ................................
................................................................
................................................................
................................................................
................................................................
................................................................
................................................................
................................................................
......................................
............
...... 15
1515
15
3.1 MIDI – THRU/OUT OUTPUT .......................................................................................................................... 15
3.2 RESET BUTTON AND INDICATION LED ............................................................................................................ 15

Korg 700S MIDI Interface
Korg 700S MIDI InterfaceKorg 700S MIDI Interface
Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-430 / v. 1.00
430 / v. 1.00430 / v. 1.00
430 / 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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1
11
1
GENERAL INFORMATION GENERAL INFORMATIONGENERAL INFORMATION
GENERAL INFORMATION
Figu
FiguFigu
Figure 1.1
re 1.1 re 1.1
re 1.1 –
––
– Connection to instrument circuits
Connection to instrument circuits Connection to instrument circuits
Connection to instrument circuits
K770-KBD MIDI interface controls VCO and GATE
generator of the Korg 700S 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 Micropreset.
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 K770-KBD interface kit
delivery contents:
(1) MIDI Interface board
(2) 2x DIN-5 socket with cable
(3) Bunched cables for power
supply
(4) Bunched cables with
button and LED
(5) Bunched cables of
keyboard control signals
(6) Coupling elements (LED
holder, screws, nuts,
washers, insulation tube
and tightening strips)
(7) Owner’s and Installation
manuals in printed form

Korg 700S MIDI Interface
Korg 700S MIDI InterfaceKorg 700S MIDI Interface
Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-430 / v. 1.00
430 / v. 1.00430 / v. 1.00
430 / 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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2
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2
MIDI INTERFACE INSTALLATION MIDI INTERFACE INSTALLATIONMIDI INTERFACE INSTALLATION
MIDI INTERFACE INSTALLATION
Mounting the interface in the Korg 700S 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 th
Attention! Disconnect the instrument form the mains prior to thAttention! Disconnect the instrument form the mains prior to th
Attention! Disconnect the instrument form the mains prior to the installation. There is a risk of the
e installation. There is a risk of the e installation. There is a risk of the
e installation. There is a risk of the
electric shock!
electric shock!electric shock!
electric shock!
Attention! Observe precautions for handling electrostatic discharge sensitive devices!
Attention! Observe precautions for handling electrostatic discharge sensitive devices!Attention! Observe precautions for handling electrostatic discharge sensitive devices!
Attention! Observe precautions for handling electrostatic discharge sensitive 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
instrument causedinstrument caused
instrument caused by the infringement of the described installation procedure or by careless
by the infringement of the described installation procedure or by careless by the infringement of the described installation procedure or by careless
by the infringement of the described installation procedure or by careless
manipulation during the installation of the MIDI interface!
manipulation during the installation of the MIDI interface!manipulation during the installation of the MIDI interface!
manipulation during the installation of the MIDI interface!
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 prio
instrument prioinstrument prio
instrument prior the interface installation. This ensures trouble
r the interface installation. This ensures troubler the interface installation. This ensures trouble
r 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. They will be
used again after the MIDI kit installation is finished. Also remember their placement.
a) Unscrew six screws from both wood side plates (three on left iside and three on right side) - fig. 2.1.1. Then
remove the wood side plates.
b) Unscrew two self-tapping screws on the top side and four self-tapping screws on the rear side of the
instrument (fig. 2.1.2). Then remove the top cover.
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
Figure 2.1.4 Figure 2.1.4Figure 2.1.4
Figure 2.1.4

Korg 700S MIDI Interface
Korg 700S MIDI InterfaceKorg 700S MIDI Interface
Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-430 / v. 1.00
430 / v. 1.00430 / v. 1.00
430 / v. 1.00
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No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
5
5
5
5
Figure 2.1.5
Figure 2.1.5Figure 2.1.5
Figure 2.1.5
c) Unscrew four big screws on the bottom side of the
instrument that hold the keyboard (fig. 2.1.3) and two
screws on left side of the instrument that hold the top
panel (fig. 2.1.4). Loosen the screw on top panel (fig.
2.1.4) – it may not be fully removed.
d) Carefuly lift up the block of keyboard and top panel
and remove the keyboard (fig. 2.1.5). Then put the
keyboard outside the instrument. All instrument’s
parts and boards needed for the interface installation
are now accessible (fig. 2.1.6).
Figure 2.1.6
Figure 2.1.6Figure 2.1.6
Figure 2.1.6
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
Figure 2.2.1
Figure 2.2.1Figure 2.2.1
Figure 2.2.1
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 suitable place for the MIDI sockets montage is
on the left side of rear panel of the instrument (fig.
2.2.1). You have to drill six holes to the panel.
b) Drill two holes with diameter 16 mm and four holes with diameter 3,2 mm to the rear panel of the
instrument as shown on fig. 2.2.2 (all dimensions are in mm). Use sharp drills and work carefully
work carefullywork carefully
work carefully so that the
cover is not scratched and other parts of the instrument are not damaged!

Korg 700S MIDI Interface
Korg 700S MIDI InterfaceKorg 700S MIDI Interface
Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-430 / v. 1.00
430 / v. 1.00430 / v. 1.00
430 / v. 1.00
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No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
6
6
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Figure 2.2.2
Figure 2.2.2Figure 2.2.2
Figure 2.2.2
c) Clean the edge of the holes with small rasp or tip of bigger drill from both sides of the panel after the holes
are drilled.
d) Clean all iron sawdust and raspings from the inside of the instruments
Clean all iron sawdust and raspings from the inside of the instrumentsClean all iron sawdust and raspings from the inside of the instruments
Clean all iron sawdust and raspings from the inside of the instruments, they can cause short circuits or serious
electrical damage if left inside the instrument. Please clean the instrument carefully!
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.
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
b) Fix DIN sockets to the drilled holes using screws, nuts and tooth lock washers from the interface accessory
(fig. 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. 2.10.8 in chapter 2.10).
2.4
2.42.4
2.4
DRILLING HOLES FOR BUTTON AND IN DRILLING HOLES FOR BUTTON AND INDRILLING HOLES FOR BUTTON AND IN
DRILLING HOLES FOR BUTTON AND INDICATION LED
DICATION LEDDICATION LED
DICATION LED
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 3.2. Nevertheless having both of them installed is more convenient for easier device
control.

Korg 700S MIDI Interface
Korg 700S MIDI InterfaceKorg 700S MIDI Interface
Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-430 / v. 1.00
430 / v. 1.00430 / v. 1.00
430 / v. 1.00
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No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
7
7
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7
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 right
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).
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 cover is not
scratched during the drilling!
Figure 2.4.2
Figure 2.4.2Figure 2.4.2
Figure 2.4.2
c) Clean the edge of all holes with small rasp or with point of bigger drill after the holes are drilled.
d) Cle
CleCle
Clean all iron sawdust and raspings from the inside of the instruments
an all iron sawdust and raspings from the inside of the instrumentsan all iron sawdust and raspings from the inside of the instruments
an all iron sawdust and raspings from the inside of the instruments, they can cause short circuits or serious
electrical damage if left inside the instrument. Please clean the instrument carefully!
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 small panel from the upper 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).

Korg 700S MIDI Interface
Korg 700S MIDI InterfaceKorg 700S MIDI Interface
Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
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430 / v. 1.00430 / v. 1.00
430 / v. 1.00
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8
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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 to several pads at the SB-018 instrument’s board (fig. 2.6.2).
Figure 2.6.1
Figure 2.6.1Figure 2.6.1
Figure 2.6.1
To X5 plug
on the interface
board
Nr. 1 - blue (-10V)
Nr. 2 - black (GND)
Nr. 3 - red (+20V)
1
2
3
1
2
3
To instrument's
SB-018 board
Figure 2.6.2
Figure 2.6.2Figure 2.6.2
Figure 2.6.2

Korg 700S MIDI Interface
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Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
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9
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a) Solder the red wire Nr. 3 “+20V“ to “9 / +V CC ” pad on the instrument’s SB-018 board (fig. 2.6.2). An orange
wire of the original bunched cables is already soldered here.
b) Solder the black wire Nr. 2 “GND“ to “14 / GND” pad on the instrument’s SB-018 board (fig. 2.6.2). A black
wire of the original bunched cables is already soldered here.
c) Solder the blue wire Nr. 1 “-10V“ to “24 / -V
EE ” pad on the instrument’s SB-018 board (fig. 2.6.2). A green
wire of the original bunched cables is already soldered here.
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). It
is advisable to shorten all wires of this cable bunch to the required length (cca 470 mm) as shown on fig. 2.7.1
1
11
1
.
Wires of the cable bunch must be connected to the instrument’s keyboard and between the instrument’s
keyboard and VCO circuits (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
a) Unsolder the gray wire from
soldering lug on the instrument’s
keyboard – under the highest key (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 gray
wire freed from the soldering lug 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
1
The delivered keyboard cable is universal for all 770, 700S and 900PS instruments so its original length does not meet the 700S exactly.

Korg 700S MIDI Interface
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Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
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10
1010
10
Figure. 2.7.5
Figure. 2.7.5Figure. 2.7.5
Figure. 2.7.5
d) Solder green wire Nr. 1 “IN” of the
interface cable to the freed soldering
lug on the instrument’s keyboard (fig.
2.7.5).
e) Solder black wire Nr. 4 “GND“ of the
interface cable to thick wire (common
bus) of the instrument’s keyboard – to
pad where a black wire is already
soldered (fig. 2.7.5).
f) Solder red wire Nr. 3 “REF“ of the
interface cable to lug on the
instrument’s keyboard where a brown
wires are already soldered (fig. 2.7.5).
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 right side of the rear metal panel of the instrument (fig. 2.8.1).
Sometimes a paper label is stuck on the panel. Scrape it off.
Figure 2.8.1
Figure 2.8.1Figure 2.8.1
Figure 2.8.1
Figure 2.8.2 Figure 2.8.2 Figure 2.8.2
Figure 2.8.2
b) Cleanse the part of rear panel for the interface board placement (fig. 2.8.1). Use a chemical cleaner to
remove all dirt and grease.
c) Remove the protective foil form the self-adhesive supports of the interface board (fig. 2.8.2).
Figure 2.8.3
Figure 2.8.3Figure 2.8.3
Figure 2.8.3
d) Attach the interface board to the instrument’s cover
so that the board side with two connectors X4 (“KBD”)
and X5 (“PWR”) points to the left as shown on the
figure 2.8.3. Than fix the self-adhesive supports by
pressing down to the cover.
e) Plug the 3-pin connector of the power supply
bunched cables lead from the SB-018 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. 2.8.4).
f) 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. 2.8.4).

Korg 700S MIDI Interface
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Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
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11
1111
11
Figure 2.8.4
Figure 2.8.4Figure 2.8.4
Figure 2.8.4
g) 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. 2.8.4).
h) Plug the 4-pin connector of the
button and LED cable to X3 (“CTRL”)
plug head on the interface board.
Orientation of the connector is given
by the connector lock again (fig. 2.8.4).
i) Align newly installed cables and fix them together with plastic stripes from the interface accessory (fig. 2.8.5).
Figure 2.8.5
Figure 2.8.5Figure 2.8.5
Figure 2.8.5
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
2
22
2
:
a) Connect MIDI output of your MIDI master keyboard (or
PC / sequencer / DAW) to MIDI input of the interface
3
33
3
.
b) Connect the high level audio output (“OUT-H”) 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:
2
It is suppossed that the interface is in "Factory Reset" status before the adjustment procedure. If it is not, send the 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
F0 00 20 21 7F 54 50 03 7F 5A
F7 [hex]
F7 [hex]F7 [hex]
F7 [hex] SysEx message to the intarface first.
3
Set transmit MIDI Channel to number 1 on the master keyboard.

Korg 700S MIDI Interface
Korg 700S MIDI InterfaceKorg 700S MIDI Interface
Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-430 / v. 1.00
430 / v. 1.00430 / v. 1.00
430 / 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.
12
1212
12
Top panel:
• EFFECT switch Æ to OFF
OFFOFF
OFF (upper position)
• SUSTAIN LONG switch Æ to OFF OFFOFF
OFF (upper position)
• TRAVEL VIBRATO switch Æ to OFF
OFFOFF
OFF (upper position)
Front panel:
• VOLUME slider Æ to MAX
MAXMAX
MAX (fully down)
• TRAVELER sliders Æ LPF (upper slider) to 10 1010
10 / HPF (lower slider) to 0
00
0
• ATTACK slider Æ to 0 00
0
• PERCUSSION / SINGING slider Æ to 10 1010
10
• SCALE selector Æ to 4’
4’4’
4’
• MODE selector Æ to Triangle TriangleTriangle
Triangle (fully counterclockwise)
• EXPAND, BRIGHT, SUSTAIN, BENDER REPEAT, VIBRATO, DEAY VIB., PORTAMENTO switches Æ all to OFF OFFOFF
OFF
(upper position)
• PITCH slider Æ to middle position
Positions of all other controllers on both instrument’s panels are not significant.
d) Plug instrument's power supply cable to a mains socket and switch the instrument on by POWER switch on
front panel. Attention
Attention Attention
Attention -
--
- work very carefully during whole adjustment procedure
work very carefully during whole adjustment procedure work very carefully during whole adjustment procedure
work very carefully during whole adjustment procedure -
--
- there is a risk of electric shock!
there is a risk of e lectric shock! there is a risk of e lectric shock!
there is a risk of e lectric 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.
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 all instrument 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) Lift up the top panel of the instrument and insert the keyboard into its slot (fig. 2.10.1). Then place whole
block of the top panel and the keyboard to original position in the instrument.
b) Fix the top panel to the instrument with two original screws on left side (fig. 2.10.2).
c) Fix the keyboard to the instrument with four original screws on bottom side (fig. 2.10.3).
d) Tighten the screw on top panel to fix it to the keyboard (fig. 2.10.4).

Korg 700S MIDI Interface
Korg 700S MIDI InterfaceKorg 700S MIDI Interface
Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-430 / v. 1.00
430 / v. 1.00430 / v. 1.00
430 / 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.
13
1313
13
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
Figure 2.10.3
Figure 2.10.3 Figure 2.10.3
Figure 2.10.3
Figure 2.10.4 Figure 2.10.4 Figure 2.10.4
Figure 2.10.4
e) Place the top cover to the instrument and fix it with four screws on rear side and two screws on top side (fig.
2.10.5).
f) Fix both wood side plates to the instrument with six screws (three on left iside and thtee on right side - fig.
2.10.6).
Figure 2.10.5
Figure 2.10.5 Figure 2.10.5
Figure 2.10.5
Figure 2.10.6 Figure 2.10.6 Figure 2.10.6
Figure 2.10.6
The installation of the MIDI interface kit is now finished and the Korg 700S 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.

Korg 700S MIDI Interface
Korg 700S MIDI InterfaceKorg 700S MIDI Interface
Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-430 / v. 1.00
430 / v. 1.00430 / v. 1.00
430 / 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
Figu
FiguFigu
Figure 2.10.7
re 2.10.7re 2.10.7
re 2.10.7
Figure 2.10.8
Figure 2.10.8Figure 2.10.8
Figure 2.10.8

Korg 700S MIDI Interface
Korg 700S MIDI InterfaceKorg 700S MIDI Interface
Korg 700S MIDI Interface
K770
K770 K770
K770-
--
-KBD
KBDKBD
KBD
Installation Manual Installation ManualInstallation Manual
Installation Manual
8
88
8-
--
-430 / v. 1.00
430 / v. 1.00430 / v. 1.00
430 / 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.
15
1515
15
3
33
3
INSTALLATION TIPS INSTALLATION TIPSINSTALLATION TIPS
INSTALLATION TIPS
3.1
3.13.1
3.1
MIDI MIDI MIDI
MIDI –
––
– THRU/OUT OUTPUT
THRU/OUT OUTPUT THRU/OUT OUTPUT
THRU/OUT OUTPUT
Figure 3.1
Figure 3.1Figure 3.1
Figure 3.1
K770-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 need 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
RESET BUTTON AND INDICATION LED RESET BUTTON AND INDICATION LEDRESET BUTTON AND INDICATION LED
RESET BUTTON 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. 3.2).
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 3.2
Figure 3.2Figure 3.2
Figure 3.2
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 770 / 700S / 900PS MIDI Interface
Model K770-KBD, Nr. 8-430, ver. 1.00
Document: 843010-3_instal
Manufacturer: CHD Elektroservis, Czech Republic
www.chd-el.cz [e-mail]