CHD Elektroservis JU6-KBD User manual

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Model 8-429
ver. 1.0
INSTALLATION MANUAL
© 2010 CHD Elektroserv is

JU6-KBD MIDI Interface for Juno-6 Keyboard Model 8-429 ver. 1.0
Copyright © 2010 CHD Elektroservis.
All rights reserved. No part of this publication may be reproduced in any form without the wri tten permiss ion of CHD Elektroservis.
2
Content
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. MIDI interface kit parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2. General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Installation of MIDI interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1. Releasing of the instrument cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2. MIDI-IN connector installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3. Bunched cables montage . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . 7
2.4. Interface board installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.5. Instrument assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Manufacture
r
:
CHD Elektroservis
Nad kundratkou 27, 19000 Praha 9
Czech Republic
[e-mail]
www.chd-el.cz

JU6-KBD MIDI Interface for Juno-6 Keyboard Model 8-429 ver. 1.0
Copyright © 2010 CHD Elektroservis.
All rights reserved. No part of this publication may be reproduced in any form without the wri tten permiss ion of CHD Elektroservis.
3
1. INTRODUCTION
The Roland Juno-6 Keyboard MIDI Interface enables the integration of MIDI in your Juno-6
instrument. The instrument's keyboard and arpeggiator can be controlled with this MIDI interface.
1.1. MIDI INTERFACE KIT PARTS
The supplied MIDI interface kit contains all necessary parts, materials, and detailed installation
instructions. The kit contents:
1. MIDI Interface board
2. Bunched cables with
connectors
3. Coupling pieces
(screws, nuts, washers
etc.)
4. CD-ROM with the user
and installation manuals
and software
1.2. GENERAL INFORMATION
The installation of all interface components is very easy. If you follow the instruction from this
manual there will be no major problems during the installation procedure.
The cover of the instrument will not be markedly damaged during the installation. The physical
appearance of the vintage instrument remains nearly the same as before the installation. If necessary,
the interface can be removed and the instrument restored back to original appearance. All original
features of the Roland Juno-6 are kept. The instrument can be used the same way as before the
retrofitting.
The following tools are necessary for the installation: Phillips screwdriver, driller, drills 3,2 and 16
mm, smaller rasp, pliers, soldering iron (a low heat iron and soldering paste).
Attention ! Disconnect the instrument form the mains prior to the installation. Otherwise,
there is a risk of the electric shock!
The producer is not responsible for any eventual mechanical or electrical damage of the
instrument caused by the infringement of the described installation procedure or by careless
manipulation during the installation of the MIDI interface!

JU6-KBD MIDI Interface for Juno-6 Keyboard Model 8-429 ver. 1.0
Copyright © 2010 CHD Elektroservis.
All rights reserved. No part of this publication may be reproduc ed in any form without the written permission of CHD Elektroservis.
4
2. INSTALLATION OF MIDI INTERFACE
The interface is connected to the keyboard switch matrix of the instrument in parallel manner. It
is also inserted into the way of arpeggiator synchronization impulses. Picture 1 shows electrical
connection of the interface to the instrument.
Pic. 1 – Electrical connection to the instrument
2.1. RELEASING OF THE INSTRUMENT COVER
a) Unscrew the four screws on the sides of the instrument (pic. 2.1-1). Keep the screws. They
will be used again after the MIDI kit installation.
b) Carefully open the instrument - lift off the instrument’s front panel (pic. 2.1-2). Instrument’s
main board is located at right side inside the instrument.
Pic. 2.1-1

JU6-KBD MIDI Interface for Juno-6 Keyboard Model 8-429 ver. 1.0
Copyright © 2010 CHD Elektroservis.
All rights reserved. No part of this publication may be reproduced in any form without the wri tten permiss ion of CHD Elektroservis.
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Pic. 2.1-2
2.2. MIDI-IN CONNECTOR INSTALLATION
There are two possible ways to install the MIDI-IN DIN socket:

If you do not want to mechanically damage the rear panel of the instrument, take out the MIDI cable
through the slot on the left side of the keyboard and solder cable DIN connector on its end (see pic.
2.2-1).

It is better to place the MIDI-IN connector on the rear panel of the instrument for easier operation. It
is necessary to drill three holes in the instrument panel however. The MIDI-IN connector can be
installed near the jack connectors (see pic. 2.2-2).
Pic. 2.2-1 Pic. 2.2-2
Pic. 2.2-3 Pic. 2.2-4

JU6-KBD MIDI Interface for Juno-6 Keyboard Model 8-429 ver. 1.0
Copyright © 2010 CHD Elektroservis.
All rights reserved. No part of this publication may be reproduced in any form without the wri tten permiss ion of CHD Elektroservis.
6
In that case, MIDI-IN connector installation procedure is as follows:
a) Flip the front cover over and return it to its original closed position on top of the synth.
b) Drill three holes (one with 16 mm diameter and two with 3,5 mm diameter) in the rear panel
(see pic. 2.2-3). Work carefully so as to not drill the parts inside the instrument (pic. 2.2-4).
c) Clean the edge of the holes with small rasp (pic. 2.2-5). Also clean the holes from the inside
after the instrument opening..
d) Clean all iron sawdust and raspings from the inside of the instruments, they can cause
short circuits or serious electrical damage if left in the instrument. Please clean the instrument
carefully!
e) The visible silver edge should be colored with black cover (you can use permanent marker for
example) (pic. 2.2-6).
Pic. 2.2-5 Pic. 2.2-6
f) Insert the MIDI-In (DIN plug) in the back cover (from inside) and fix it with screws and nuts (pic.
2.2-7). Insert the flat washers under the heads of the screws and fan type washers under the nuts (pic.
2.2-8). All material is a part of the kit.
Pic. 2.2-7 Pic. 2.2-8
g) It is suitable to mark the connector („MIDI IN“) use e.g. self-adhesive foil (pic. 2.2-2).

JU6-KBD MIDI Interface for Juno-6 Keyboard Model 8-429 ver. 1.0
Copyright © 2010 CHD Elektroservis.
All rights reserved. No part of this publication may be reproduc ed in any form without the written permission of CHD Elektroservis.
7
2.3. BUNCHED CABLES MONTAGE
The bunched cables (part of the kit) has a six-pin connector on one end (pic. 2.3-1). There are six
terminals. Two of them (Nr. 3, Nr. 4) are already fixed to newly installed DIN - MIDI-IN connector. Next
two (Nr. 5, Nr. 6) must be connected to the instrument's main board and last two (Nr. 1, Nr. 2) to the
instrument’s wiring (pic. 2.3-2). The bunched cables are placed along the instrument's keyboard as
shown on picture 2.3-3
Pic. 2.3-1
Pic. 2.3-2

JU6-KBD MIDI Interface for Juno-6 Keyboard Model 8-429 ver. 1.0
Copyright © 2010 CHD Elektroservis.
All rights reserved. No part of this publication may be reproduced in any form without the wri tten permiss ion of CHD Elektroservis.
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Pic. 2.3-3
a) Wires Nr. 3 and Nr. 4 of bunched cables are already connected to newly installed MIDI-IN
socket.
b) Black wire (GND - Nr. 5) is equipped with female plug. It must be plugged on “G” marked pin of
TP1 connector on instrument’s board (pic. 2.3-4).
c) Red wire (+5V - Nr. 6) is equipped with female plug. It must be plugged on “+5V” marked pin of
TP1 connector on instrument’s board (pic. 2.3-4).
Pic. 2.3-4

JU6-KBD MIDI Interface for Juno-6 Keyboard Model 8-429 ver. 1.0
Copyright © 2010 CHD Elektroservis.
All rights reserved. No part of this publication may be reproduced in any form without the wri tten permiss ion of CHD Elektroservis.
9
d) Cut the blue wire from the pin Nr. 37 (CLK) of connector “36~39” on the instrument’s main
board (pic. 2.3-5). Remove the insulation (approx 5 mm) from both ends of the blue wire and tin both
ends of the wire (pic. 2.3-6).
e) Place a shrink-wrap insulation tubes (parts of delivery) on both blue wires (Nr.1 and Nr. 2) of
interface’s bunched cables.
f) Solder the end of the wire from pin Nr. 37 of the connector “36~39” on the instrument’s main
board to wire Nr. 2 (CLK-OUT) of interface’s bunched cables (pic. 2.3-7).
g) Solder the other end of cut blue wire to wire Nr. 1 (CLK-IN) of interface’s bunched cables (pic.
2.3-7).
Pic. 2.3-5 Pic. 2.3-6
Pic. 2.3-7 Pic. 2.3-8
h) Isolate the soldered connections with the insulation tubes and heat them until they shrink
tightly to the wire. The tubes can be heated with a hot-flue pistol, for example (pic. 2.3-8). Be very
careful so that no cables or components are damaged during this operation!

JU6-KBD MIDI Interface for Juno-6 Keyboard Model 8-429 ver. 1.0
Copyright © 2010 CHD Elektroservis.
All rights reserved. No part of this publication may be reproduced in any form without the wri tten permiss ion of CHD Elektroservis.
10
2.4. INTERFACE BOARD INSTALLATION
a) Detach cables lead from instrument’s keyboard by cutting of plastic stripe on the instrument’s
floor plate (pic. 2.4-1).
b) Disconnect cables lead from instrument’s keyboard from connectors “1~8“ and “9~16“ on
instrument’s main board (pic. 2.4-2).
c) Plug the interface to free connectors “1~8“ and “9~16“ on instrument’s main board to that the
interface board directs to right (pic. 2.4-3).
d) Insert plastic spacing tube (part of delivery) between interface’s board and instrument’s floor
plate. Fix interface’s board with help of wood screw (part of delivery) to instrument’s floor plate as
shown on pic. 2.4-4.
Pic. 2.4-1 Pic. 2.4-2
Pic. 2.4-3 Pic. 2.4-4
e) Plug the flat 6-pin connector of newly installed bunched cables (from +5V, GND, CLK and
MIDI-IN socket) to the flat connector on the MIDI-In interface board (pic. 2.4-5). The connector is
shaped such that it cannot be connected the wrong way - there are locks on it.
f) Plug the connectors of the bunched cables from the keyboard onto the plugs on the interface’s
board (pic. 2.4-6). The connectors cannot be connected the wrong way (there are locks on them) but
be careful so they would not be exchanged!

JU6-KBD MIDI Interface for Juno-6 Keyboard Model 8-429 ver. 1.0
Copyright © 2010 CHD Elektroservis.
All rights reserved. No part of this publication may be reproduced in any form without the wri tten permiss ion of CHD Elektroservis.
11
Pic. 2.4-5 Pic. 2.4-6
2.5. INSTRUMENT ASSEMBLY
a) Turn over the front panel of the instrument.
b) Reattach the front panel to the sides of the instrument with four screws (pic. 2.5-1). This is the
reverse procedure of that described in the chapter 2.1.
Pic. 2.5-1
The installation of the MIDI kit is now finished and the instrument is ready for use with MIDI
communication.
Please read the user’s guide carefully before the MIDI interface use.

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