Kenton TB303 3 v.2 - Manual (Page 2)

Troubleshooting:
1) Ensure that your CV converter is on and working, and is set to the same MIDI channel you are transmitting on.
2) Ensure that the TB-303 plays OK without any CV / Gate / Filter / Slide / Accent leads connected.
3) Check that your connecting leads are not faulty and that they have 3.5mm mono jacks on the end connected to
the TB-303 (not stereo jacks).
4) Try just the Gate on it’s own. You should get a note playing on the TB-303 in time with the note played on your
MIDI keyboard. It will be the same note all the time without the CV lead connected.
5) Try just the CV on it’s own. You will need to operate the internal sequencer of the TB-303 for this in order to
trigger the notes, but the CV should follow the notes you play on your MIDI keyboard
6) Don’t connect the filter input until you are sure that everything else is working OK as with certain settings, the
filter can stop any sound being heard.
7) If the TB-303 sounds when you release your note and is silent while the note is pressed, you have the Gate
output of your CV converter set to the wrong mode. It must be set to v-trig mode (a voltage is present at the
gate output when a note is played).
8) If the tuning is wrong and the intervals between notes get bigger as you go up the scale, your CV converter is
set to the wrong type of scaling. It should be set to Volt/Octave mode.
9) Any other tuning problems must be addressed using the controls on your CV converter
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Notes on using the Din Sync 24 input:
The TB-303 also has a 5 pin socket for sync input fitted as standard. This can be connected to the Sync 24 output
on your converter (if it has one). This will enable you to run the TB-303 in synchronisation with your sequencer. In
this mode, you must program the patterns you want to play directly into the TB-303 from it’s own front panel.
When you start your sequencer, the TB-303 will then play the patterns in time with your sequence. You will always
have to start the sequence from the top as the TB-303 will not recognise song position pointers.
Troubleshooting Din Sync 24:
1) The lead you need for connecting Sync 24 may look like a MIDI lead, but it is not. MIDI leads only require
three connections out of the possible 5 on the 5 pin DIN socket, the sync connection requires that all 5 wires
are connected, which means that many MIDI leads won't work. You will need to get a standard 5 pin DIN to 5
pin DIN to 5 pin DIN lead which Kenton can supply. (If you are connecting to a Pro-Solo, you will need a 5 pin
din to 2 mini jack plug lead, Kenton can supply that too.)
2) You need to make sure that the clock output is enabled on your sequencer, this is very often on a setup
page or on a pull-down menu. The Sync 24 output on Kenton converters cannot be disabled, so if your
TB-303 doesn't start with your sequencer, you can be sure that the converter isn't receiving MIDI sync.
Alternatively, you may have a faulty or incorrect lead or even maybe a faulty sync input socket on the TB-303.
3) MIDI sync isn't on any particular MIDI channel, it's on a sort of global channel of its own.
Kenton Electronics www.kentonuk.com
Brookfarm House, Station Road, South Wimbledon, London, SW19 2LP, UK
Tel: 020-8544-9200 Fax: 020-8544-9300
International Tel: +44 20-8544-9200 Fax +44 20-8544-9300