Roland TR808-M, TR-808, 8-448 Installation Manual
Model 8-448 ver. 3.2
INSTALLATION MANUAL
© 2010 CHD Elekt roserv is
MIDI Interface For Roland TR
TR808
TR808----M
TR808TR808
Model 8
Contents
1. Introduc tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. MIDI interface kit co mponents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2. General instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. MIDI interface installation procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1. TR-808 cover panel disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2. Electric and mechanic ground adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3. "SYN C" con nector and switch repl acement . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4. C onnecting the interface cable to the TR- 808 main board . . . . . . . . . . . . . . . . 7
2.5. LED indicator montage into the "START / ST OP" button . . . . . . . . . . . . . . . . . 10
2.6. MIDI interface main board installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.7. TR -80 8 assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3. New functions of TR-808 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1. "SYN C" switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3
3.2. "SYN C" con nector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3. "START /S TOP" button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4. Connection to M ID I sy stem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4. DAC Calibration procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
M
M M
Model 8----448 ver. 3.2
Model 8 Model 8
MIDI Interface For Roland TR----808
MIDI Interface For Roland TRMIDI Interface For Roland TR
808
808808
448 ver. 3.2
448 ver. 3.2448 ver. 3.2
page
Manufacturer :
9.května 78/35, 198 00 Praha 9, Czech Republic
No part of this publi cation may be reproduced in any form w ithout the written perm ission of CHD Elektroservis.
Copyright © 2010 CHD Elektroservis. All rights reserved.
CHD Elektroservis
www.chd-el.cz
info@chd-el.cz
2
MIDI Interface For Roland TR
TR808
TR808----M
TR808TR808
Model 8
1. INTRODUCTION
The TR-808 MIDI retrofit enables your Roland TR-808 to be synchronized with other MIDI
devices and work like polyphonic velocity sensitive M IDI drum expander. M ore over all original features
of the TR -808 are not changed. The instrument can be used exactly the same way as before the
interface installation.
1.1. MIDI INTER FACE KIT COMPONENTS
The TR-808 MID I interface kit package contains all necessary components and material for the
installation, including manual with detailed description of the installation procedure. The TR-808 kit
package contains:
[1] MIDI Interface main board (MAIN) including the self-adhesive supports
[2] Synchronization terminals board (SYNC IN/OUT) including the material and cables (screws,
washers and plastic stripes)
[3] 20-core multi-cable with the connector and indication LED
[4] Ground cable with the isolating capacitor
[5] Special MIDI cable - reduction
[6] CD-ROM with user and installation manuals and support software
M
M M
Model 8----448 ver. 3.2
Model 8 Model 8
MIDI Interface For Roland TR----808
MIDI Interface For Roland TRMIDI Interface For Roland TR
808
808808
448 ver. 3.2
448 ver. 3.2448 ver. 3.2
1.2. GENERAL INSTRUCTION
Installation of all interface components is simple. There will be no major problems during the
installation procedure if you follow instructions from this manual exactly.
It is not necessary to drill any holes in the vintage instrument - all changes can be replaced
without visible changes. T he interface can be removed and the instrument can be restored back to the
original appearance at any time if necessary.
3
No part of this publi cation may be reproduced in any form w ithout the written perm ission of CHD Elektroservis.
Copyright © 2010 CHD Elektroservis. All rights reserved.
MIDI Interface For Roland TR
TR808
TR808----M
TR808TR808
Model 8
Before starting the work prepare yourself an small and medium s ize Phillips screwdrivers, pincers
or scissors, pliers, soldering iron (with soft iron and soldering paste), electric or manual drill with the 5
mm caliber driller, knife and an universal glue.
Attention ! It is necessary to disconnect the instrument form main prior the installation, or
else there is high risk of the electric shock injury !
Manufacturer is not responsible for any eventual mechanical or electrical damage to the
Roland TR-808 instrument caused by violation of described installation procedure or by
2. M IDI IN TER FACE INS TALLATION P ROCEDU RE
2.1. TR-808 COVER PANEL D ISASSEM BLY
and four screws on the top panel of the TR-808 (pic. 1-1). Do not lose the screws. They will be used
again after the M IDI kit installation.
careless manipulation during the installation of the MIDI inter face !
a) Unscrew three screws on the front panel (pic. 1-3), three screws on the rear panel (pic. 1-1)
M
M M
Model 8----448 ver. 3.2
Model 8 Model 8
MIDI Interface For Roland TR----808
MIDI Interface For Roland TRMIDI Interface For Roland TR
808
808808
448 ver. 3.2
448 ver. 3.2448 ver. 3.2
b) Carefully lift up the rear side of the TR-808 cover panel, move the entire panel approx. 2 cm
towards yourself and lift up the front side and turn over the entire cover panel of the TR -808
backwards. We recommend to place it on the soft textile pad, to prevent the panel from the damage.
2.2. ELECTRIC AND MECHANIC GROUND ADJUSTMENT
Mechanic and electric grounds are directly interconnected on the TR -808. This galvanic
interconnection can make problems when connecting the T R-808 in the loudspeaker systems. Strong
hum can occur in such a case. It is necessary to isolate both grounds by replacing the ground cable to
eliminate these problems.
This adjustment is not required for correct MIDI interface functionality.
If you do not need to isolate the electric and mechanic grounds leave this
chapter out.
a) Unsolder the green ground cable, going out of the output
connectors board in the front cover, form the soldering hole screwed to rear
panel (pic. 2-1).
4
No part of this publi cation may be reproduced in any form w ithout the written perm ission of CHD Elektroservis.
Copyright © 2010 CHD Elektroservis. All rights reserved.
MIDI Interface For Roland TR
TR808
TR808----M
TR808TR808
Model 8
b) Unsolder the second end of the cable form the soldering pad on the output connectors board
(pic. 2-2). Be very careful here, the soldering pad is badly accessible. There is a risk of the damage of
the surrounding parts.
M
M M
Model 8----448 ver. 3.2
Model 8 Model 8
MIDI Interface For Roland TR----808
MIDI Interface For Roland TRMIDI Interface For Roland TR
808
808808
448 ver. 3.2
448 ver. 3.2448 ver. 3.2
c) Unsoldered ground cable replace with the cable supplied with the MIDI kit package (part [4] of
the delivery). Solder any side of the cable back to the soldering pad and the other end to the soldering
lug screwed to rear panel of TR-808. Both sides of ground cable are interchangeable. They can be
swapped. Be very careful when soldering on the outputs board.
2.3. "SYNC" CONNECTOR AND SWITCH REPLACEMENT
5
No part of this publi cation may be reproduced in any form w ithout the written perm ission of CHD Elektroservis.
Copyright © 2010 CHD Elektroservis. All rights reserved.
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