Ordercode: 50825
No Light
This troubleshooting guide is meant to help solve simple problems.
If a problem occurs, carry out the steps below in sequence until a solution is found. Once the unit
operates properly, do not carry out following steps.
If the DMX trigger or the light effect does not operate properly, refer servicing to a technician.
Suspect three potential problem areas as: the power supply, the DMX trigger and the light fixture.
01) Power supply. Check if the unit is plugged into an appropriate power supply.
02) The DMX trigger. Return the TR-512 to your Showtec dealer.
03) The light fixture. Return your light fixture to your dealer.
04) If all of the above appears to be O.K., plug the unit in again.
05) If you are unable to determine the cause of the problem, do not open the TR-512, as this may
damage the unit and the warranty will become void.
06) Return the device to your Showtec dealer.
No Response to DMX
Suspect the DMX cable or connectors, a controller malfunction, a light effect DMX card malfunction.
01) Check the DMX setting. Make sure that DMX addresses are correct.
02) Check the DMX cable: Unplug the unit; change the DMX cable; then reconnect to electrical power.
Try your DMX control again.
03) Determine whether the DMX trigger, light controller or light effect is at fault. Does the controller
operate properly with other DMX products? If not, take the controller in for repair. If so, take the DMX
cable and/or the light effect to a qualified technician.
Probable cause(s)
The device does
not function at all
No power to the device
Check if power is switched on and
cables are plugged in
Fixtures reset
correctly, but all
respond erratically
or not at all to the
The controller is not connected
Connect controller
3-pin XLR Out of the DMX trigger
does not match XLR Out of the
fixture on the link (i.e. signal is
Install a phase reversing cable
between the controller and the first
fixture on the link
Fixtures reset
correctly, but
some respond
erratically or not at
all to the DMX
Poor data quality
Check data quality. If much lower than
100 percent, the problem may be a
bad data link connection, poor quality
or broken cables, missing termination
plug, or a defective fixture disturbing
the link
Bad data link connection
Inspect connections and cables.
Correct poor connections. Repair or
replace damaged cables
Data link not terminated with 120
Ohm termination plug
Insert termination plug in output jack of
the last fixture on the link
Incorrect addressing of the fixtures
Check address setting
3-pin XLR Out on the fixtures does
not match (pins 2 and 3 reversed)
Install a phase-reversing cable
between the fixtures or swap pins 2
and 3 in the fixture
No light or
LEDs/lamp cuts out
Fixture is too hot
Allow fixture to cool down
Make sure air vents and front lens are
not blocked
Turn up the air conditioning
LEDs/lamp damaged
Disconnect fixture and return to your
The power supply settings do not
match local AC voltage and
Disconnect fixture. Check settings and
correct if necessary
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