CR-8000 MIDI Upgrade

CR-8000 MIDI Upgrade
CR-8000 MIDI Upgrade
CR-8000 Installation
The CR-8000 will require some modifications to allow it to be MIDIfied. The modification
involves adding a multipin connector in series with the CR-8000 Trigger signals. This
connector is mounted on the back panel of the CR-8000. A mating connector is then wired
to an external MIDI-TRIGGER unit. To restore the CR-8000 back to normal operation
simply requires a 2nd mating connector to be plugged in. This connector is internally wired
with loopback wires that connect the Expansion connector output pins to the Expansion
connector input pins thus effectively restoring the original wiring.
It is not possible with this modification to have both the internal trigger generator AND the
external MIDI-Trigger generator running at the same time.
The MIDI2SDS-16 unit has 16 trigger outputs. In addition it offers the facility for installing
an LED indicator for each trigger. These LED outputs are not used in this modification. If
required, you will either need to use a larger connector (at least 53 pins), add a 2nd
connector (at least 17 pins) or install the LEDs in to the MIDI2SDS-16 unit.
Connections on the Expansion port are also included for a MIDI-IN socket and a LEARN
switch. The LEARN switch is required for (re)defining the MIDI notes associated with each
TRIGGER. If you intend to this only once then you can leave the LEARN switch
unterminated, and simply jumper the pins in the MIDI2SDS-16 unit when required. It
should be noted that having the LEDs installed is a major benefit while in the LEARN
mode. The MIDI-IN socket can be mounted in the MIDI2SDS-16 unit itself or can be wired
to a MIDI socket in the CR-8000. This may either be a totally dedicated MIDI IN socket or
you can use the unsued pins on the SYNC IN/OUT connector. Please note that this latter
option will require the use of a splitter cable to separate the SYNC signals from the MIDI
IN signals. For this modification we suggest using the SYNC IN/OUT option although there
is plenty of room for a new socket to be added on the back panel.
The first modification to the CR-8000 is the
addition of the Expansion connector. Carefully
cut a hole in to the back panel of the CR-8000
sized to take the supplied 37-pin connector.
Once the connector has been installed it is time
to make the next modification to the CR-8000.
This modification will allow the sound
generating circuitry to be either triggered by the
internal CR-8000 controller or the external
MIDI-TRIGGER unit.
Elby Designs - Laurie Biddulph
9 Follan Close, Kariong, NSW 2250, Australia
elby_designs@ozemail.com.au
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CR-8000 MIDI Upgrade
This is achieved by interception the
internally generated trigger signals. You
will see a 15-pin connector on the logic
board (bottom-centre in picture at left) .
Each of these wires needs to be
unsoldered from its termination on the
sound generator board and taken to its
respective pin on the Expansion
connector. At the same time, you
should add a new wire from the
previous termination point on the sound
generator and run this to the relevant
point on the Expansion connector.
Repeat for all 15 wires.
Power Connection
The MIDI2SDS-16 unit requires a 12V to 15VDC supply which can be safely taken
from the CR-8000
Access to the power port is made
through a set of pads visible in the
lower left corner of the picture top the
left.
The port has 4 power pins although
we only require 2 for this application.
Carefully solder 2 wires on to the
indicated pins and run them to the
relevant pins on the Expansion
Connector.
• Yellow –15V (Not Used
• Red +15V (To Power connector)
• Blue 0V (To Power connector)
• White +5V (Not Used)
Elby Designs - Laurie Biddulph
9 Follan Close, Kariong, NSW 2250, Australia
elby_designs@ozemail.com.au
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CR-8000 MIDI Upgrade
CR-8000 Expansion Connector
Expansion Connector
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
Location
CPU Board 9
CPU Board 10
CPU Board 11
CPU Board 12
CPU Board 13
CPU Board 14
CPU Board 15
CPU Board 16
CPU Board 17
CPU Board 18
CPU Board 19
CPU Board 20
CPU Board 21
CPU Board 22
CPU Board 23
Signal
HC – Hi Conga
LC – Low Conga
MC – Middle Conga
CB – Cow Bell
CY – Cymbal
HT – Hi Tom
OHH – Open Hi-Hat
LT – Low Tom
HH – Hi-Hat
SD – Snare Drum
BD – Bass Drum
ACC – Accent
HCP – Hand Clap
C – Claves
RS – Rim Shot
SYNC IN/OUT 4
SYNC IN/OUT 5
MIDI-IN
MIDI-IN
VG Board 31
VG Board 29
VG Board 28
VG Board 3
VG Board 30
VG Board 2
VG Board 25
VG Board 5
VG Board 26
VG Board 1
VG Board 4
VG Board 22
VG Board 23
VG Board 27
VG Board 24
HC – Hi Conga
LC – Low Conga
MC – Middle Conga
CB – Cow Bell
CY – Cymbal
HT – Hi Tom
OHH – Open Hi-Hat
LT – Low Tom
HH – Hi-Hat
SD – Snare Drum
BD – Bass Drum
ACC – Accent
HCP – Hand Clap
C – Claves
RS – Rim Shot
0V
12V
Elby Designs - Laurie Biddulph
9 Follan Close, Kariong, NSW 2250, Australia
elby_designs@ozemail.com.au
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http://www.elby-designs.com
CR-8000 MIDI Upgrade
MIDI2SDS-16 Expansion Connector
Expansion Connector
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
Location
Signal
VG Board 31
VG Board 29
VG Board 28
VG Board 3
VG Board 30
VG Board 2
VG Board 25
VG Board 5
VG Board 26
VG Board 1
VG Board 4
VG Board 22
VG Board 23
VG Board 27
VG Board 24
HC – Hi Conga
LC – Low Conga
MC – Middle Conga
CB – Cow Bell
CY – Cymbal
HT – Hi Tom
OHH – Open Hi-Hat
LT – Low Tom
HH – Hi-Hat
SD – Snare Drum
BD – Bass Drum
ACC – Accent
HCP – Hand Clap
C – Claves
RS – Rim Shot
This plug connects the MIDI2SDS-16 outputs to the CR-8000 inputs. It also connects the
CR-8000 power pins to the MIDI2SDS-16 and also provides connections for MIDI IN.
Elby Designs - Laurie Biddulph
9 Follan Close, Kariong, NSW 2250, Australia
elby_designs@ozemail.com.au
4 of 5
http://www.elby-designs.com
CR-8000 MIDI Upgrade
CR-8000 Loopback Connector
Expansion Connector
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Expansion Connector
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
This plug simply connects the CR-8000 outputs to the CR-8000 inputs.
In this picture you can see
the rerouted CPU Board
connections,
coloured
cables
running
from
bottom centre of righthand
board
to
the
Expansion connector and
the new trigger cable, blue
ribbon cable running from
the left-hand board to the
Expansion connector.
Elby Designs - Laurie Biddulph
9 Follan Close, Kariong, NSW 2250, Australia
elby_designs@ozemail.com.au
5 of 5
http://www.elby-designs.com
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