Doepfer MBP25 Midi Bass Pedal Electronics Kit - Manual (Page 12)

MBP25 Page 12 User's Guide
Parameter Storage
Whenever one changes from one menu to another the parameter of the preceeding
menu is stored non-volatile in the MBP25 memory. After the next power on these
values are chosen. These values are stored: midi channel, transpose, program
change number and mode.
Configuration Mode
In this special mode all parameters can be adjusted that have basic functions and are
normally adjusted once only. So far only the velocity value for the note messages
transmitted by the MBP25 can be adjusted in this mode.
To select the configuration mode one has to operate one of the menu buttons during
power on. Then the display shows "CoF" (abbreviation of "configuration") instead of
the software version number and the 6 LEDs work inverted, i.e. all LEDs light up
except the LED of the currently selected menu.
The most left button (midi channel menu in normal operation) is used to adjust the
fixed velocity value in the range 1...127 in combination with the up/down buttons. The
remaining 3 menu buttons have no function.
When the desired velocity value is set the MBP25 has to be turned off. After about 10
seconds it has to be powered again without operating one of the buttons. Now the
normal operation mode is called up (the display shows the software version and then
the mode).
Check list
In case that your MBP25 does not work at the first go please check the following
points:
• Is the power supply working correctly ? After power on the LEDs has to light up
for a short time, the display has to show the software version (e.g. "100") and then
to show the mode ("not", "Prg" or "rtI"). Otherwise the AC adapter used is not
suitable, has the wrong polarity or does not work. The correct polarity is: outside
ring = GND, inside lead = +7...12V.
• Are the midi connections between MBP25 and the other midi devices installed
correctly ? Midi out of the MBP25 has to be connected to midi in of the device
controlled by MBP25. Especially when computers are used midi in and out are
very often mixed up by the user.
• Please use only cables that are suitable for Midi.
• If all that is correct but playing on the bass pedal seems not to generate midi
messages check if the pedal(s) are connected in the right way and if the midi
channel of the MBP25 corresponds to the midi channel of the receiver.
• If you use another bass pedal than the Fatar PD/3 (e.g. if you have built your own
bass pedal or switch matrix) double check if your matrix and the connectors is
identically to the Fatar keyboards.
• If a potentiometer is used check if it is connected in the right way to the MBP25.
An unused input (ST3) has to be terminated with a jumper !
• If the potentiometer works inverted it is connected in the wrong way (GND and +5V
mixed up).
• Check also if a sufficient fixed velocity value has been set (e.g. you will hear
nothing with velocity 1 or 2).