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a p p e n d i x a
TR O U B L E S H O O T I N G
problem
None of the fixtures respond
to the controller.
Some fixtures do not
respond, respond erratically,
or continuously reset.
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 mea-
sure 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. Infi-
nite resistance indicates a bad connection, broken wire, or a defective fixture. Very low
readings indicate a short circuit in the data 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.
Fader control is overriding
programming.
The scenes do not contain
'Lamp On' instructions for fix-
tures with remote lamp on/off.
Faders not calibrated.
Troubleshooting
suggested remedy
Connect controller.
Press blackout button.
Check data link connections/
cables and correct accord-
ingly.*
Swap pins 2 and 3. See sec-
tion 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.
Turn off fader control.
Make sure the "Lamp On"
command is saved in at least
one scene.
Calibrate faders as described
in "Service".
17
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