Doepfer Dial Electronic - Manual (Page 10)

DIAL ELECTRONIC Page 10 User's Guide
Check list
In case that your DE installation does not work at the first go please check the
following points:
• Is the power supply working correctly ? Provided that the 4 LEDs are connected to
JP2 they have to light up one after the other and then LED #1 has to light up only.
• Are the controls (encoders, switches, LEDs) connected as described in this
manual ?
• Was no short circuit made (neither in the wiring nor mounting) ?
• When the diode D41 and the voltage regulator IC7 become hot probably a short
circuit between GND and +5V was made !
• Are the Midi connections between DE and the other Midi devices installed correctly
? Midi Out of DE has to be connected to Midi In of the Midi device controlled by
DE. Especially when computers are used Midi In and Out are very often mixed up
by the user. Once again: Midi Out
→ Midi In (not Midi Out → Midi Out nor Midi In
→ Midi In).
• Please use only cables that are suitable for Midi.
• When a PC with sound card is used only high quality multimedia cables should be
used. Low cost multimedia cables without optocouplers for Midi In and without
drivers for Midi Out very often cause Midi data problems.
• Is the right preset number selected with the DIP switch ? A good preset number for
testing is no 1: if 8 switches are "off" one obtains volume on the Midi channels
1...16 (provided that the factory presets are unchanged, otherwise the Midi
messages you have programmed to preset no 1 will appear).
Mounting
Before DE is put into operation the board has to be fixed on a suitable support and
built into a metal case together with the controls (refer to EMC notes on page 2). The
metal case has to be connected to GND of DE. We recommend to use the metal
plate of the voltage regulator 7805/IC7 or the GND terminal of the power supply
socket for this connection.
Several mounting holes with 3 mm diameter are available for mounting the board
inside the case e.g. with distance sleeves or spacers (> 5 mm in length) and suitable
screws. Pay attention that no short circuits are made – neither on the top of the board
(electronic parts) nor on the bottom (solder points or pcb tracks). In case of doubt
use isolating plastic parts (e.g. plastic screws, nuts and washers) for mounting.