Appendix A Troubleshooting - Martin DMX Controller 2518 User Manual

a p p e n d i x a
T
ROUBLESHOOTING
problem
None of the fixtures
respond to the controller.
Some fixtures do not
respond, respond erratically,
or continuously reset.
Save commands do not
work.
Fixtures do not execute pro-
gramming on one or more
channels.
No light from some or all fix-
tures.
Uneven or incomplete fader
control.
* To test the data link with an ohm meter, disconnect the link from the controller and
measure the resistance across pins 2 and 3 of the XLR male plug. The reading should
be around 120 ohms. Readings from 400 - 20,000 ohms indicate the data link is not
terminated. Infinite resistance indicates a bad connection, broken wire, or a defective
fixture. Very low readings indicate a short circuit in the link or a defective fixture.
probable cause(s)
The controller is discon-
nected from the data link.
Blackout or standby mode
selected.
Bad data link connection.
DMX signal polarity
reversed.
DMX signal reflection.
Incorrect addressing of fix-
tures.
Fixtures not on.
Protocol auto-detection fail-
ure.
Memory locked.
Fader control is overriding
programming.
The scenes do not contain
'Lamp On' instructions for
fixtures with remote lamp
on/off.
Faders not calibrated.
suggested remedy
Connect controller.
Press blackout button.
Check data link connec-
tions/cables and correct
accordingly.*
Swap pins 2 and 3. See
section 2.
Insert termination plug in
the last light on the link.
Check addresses.
Turn on fixtures.
Switch the fixtures off and
then back on. In general,
power on the controller
before the fixtures.
Unlock memory.
Turn off fader control.
Make sure the "Lamp On"
command is saved in at
least one scene.
Calibrate faders as
described in "Service".
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