Doepfer Pocket Dial (device no longer available) - Manual (Page 32)

Page 32
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User's Guide
Troubleshooting
There will be times when the Pocket Dial does not seem to be working as expected, before suspecting
a faulty Pocket Dial, the checklist below should help resolve the problem. Though there is no separate
power indicator on the Pocket Dial at least one of the LEDs is always active.
•
Is the Pocket Dial powered up correctly? After power on the four LEDs at the upper left side have to
light up one after another ("running light"). Then the first LED has to turn on. When the CHN button
is held down the LEDs 1 and 2 have to turn on (master channel adjust mode), when the PRG button
is held down the LEDs 3 and 4 have to turn on (program change mode). If this does not happen
check the power supply used: right voltage (7V to 12V DC not stabilized), minimum current 100mA,
polarity: positive inner (see the sketch near the power supply socket)
•
Are suitable cables used for the MIDI connections. Do not use standard 5 pin DIN cables but only
cables that are approved for MIDI.
•
Do not mix up MIDI In and MIDI Out. MIDI Out of Pocket Dial has to be connected to MIDI In of the
device controlled by Pocket Dial. MIDI In of Pocket Dial has to be connected onyl in certain cases
(refer to page 6 for details). MIDI Out of the device controlling Pocket Dial has to be connected to
MIDI In of Pocket Dial:
Correct: Device 1 MIDI Out
→
Device 2 MIDI In
Correct: Device 1 MIDI Out
→
Device 2 MIDI In
Wrong: MIDI Out
→
MIDI Out
Wrong: MIDI In
→
MIDI In
•
Moving one of the knobs will flash the LED above button of the active bank. The LED does not flash
if the knob has not been assigned a function or if the uppermost or lowest data is reached already.
•
Is the Pocket Dial set to the correct preset? Maybe one of the DIP switches has moved accidentally
or a MIDI program change has set a new preset up. Check if the DIP switch settings correspond to
the desired preset. There may be DIP switch settings that refer to an empty preset. In this case the
Pocket Dial will generate no MIDI data at the output and the LED will not flash!
•
Changing the preset with the DIP switch has to be indicated by a short lighting up of all four LEDs.
•
Is the Pocket Dial set to the correct MIDI channel? Many presets make use of the Master Channel,
there is no way of checking what the Master Channel is set to (other than monitoring the transmitted
data), so the best procedure here is to set the Master Channel again to double check if it is correct.
Refer to page 8 about how to adjust the Master Channel.
•
The active LED has to flash when MIDI data are sent to the Pocket Dial. Otherwise the MIDI cable
used might be unsuitable or there is a mistake in the wiring of the devices.
•
If incoming MIDI data does not appear at the MIDI output though the LED displays MIDI In activity
probably the MIDI Thru is switched off. This can be done only by the editor software. In this case the
Pocket Dial has to be reprogrammed by the editor program but with MIDI Thru switched on !
•
If one of the knobs will not respond though one has selected a suitable preset maybe the uppermost
(127) or lowest (0) data was sent already. E.g. if you turn a knob clockwise and reach the uppermost
data value (127) continued turning will cause no more MIDI data as the last possible value was
already sent. So change the turning direction if a knob seems to respond no longer (applies only for
absolute data type, relative inc/dec data have no upper/lower limit).
•
Problems with MIDI loops: remember that the Pocket Dial normally merges it’s own data with MIDI
input data. This can cause a MIDI loop: e.g. MIDI Out Computer
→
MIDI In Pocket Dial
→
MIDI Out
Pocket Dial
→
MIDI In Computer = MIDI loop. So you have to make sure that no MIDI loop appears,
e.g. by turning off the MIDI Thru mode of the Pocket Dial (possible only with editor software) or the
MIDI Thru of the device controlled by Pocket Control (e.g. computer). In some devices this function
is called MIDI echo on/off.
•
If all four LEDs turn on the Pocket Dial has recognized an MIDI overflow. To clear an error, press
one of the 6 buttons. The error display indicates that the merge capacity of Pocket Dial was
exceeded or that SysEx messages destined for Pocket Dial could not be processed because they
were sent too fast.
•
Pay attention that the device controlled by Pocket Dial is in the right mode (e.g. XG mode for XG
messages).