GTD-L488 User Manual
15
The fixture is equipped with thermal-protection device that will switch off the LED lamp in case of overheating. If
this happens, please check that the fans are not blocked, and clean them if they are dirty. Check whether the fans
are operational. If not, call a qualified technician. Troubleshoot and correct the problem before switching on the
fixture again. Any maintenance work should only be carried out by qualified technicians.
Troubleshooting
Problem
Possible Cause
Suggested Correction
No response
after connected
to A/C power
Power switch not turned on.
Turn on power switch.
Take out the fuse and check if it is blown.
Locate the blown fuse. Remove the broken fuse. Insert a
replacement fuse of the correct amperage.
Abnormal A/C input (A/C power socket,
power cables, luminaire power socket).
Replace AC power socket and power cables, and then adjust power
socket for proper connection.
No DC voltage from switching power
supply.
Check if the switching power supply has DC voltage output. Replace
the switching power supply.
No response or
wrong response
to the
commands of
the control
system
DMX cables disconnected from fixture’s
DATA IN connector.
Connect DMX cable to the fixture’s DATA IN connector.
Open circuit or short circuit fault in the
DMX cables.
Replace DMX cables as required.
Wrong DMX address for the fixture in the
control system.
Ensure the address in “Run setting > Address Setting > Address”of
the fixture is consistent with the address in the control system.
Misuse in “Channel setting > Channel
Mode” of the fixture.
Choose the channel mode in “Channel setting > Channel Mode” of
the fixture as required by the user.
Malfunctioning of DMX cannon input
/output connectors. No input/output
voltage to the main control board of the
fixture.
Troubleshooting the DMX XLR signal plate of the fixture, replace the
main control board of the fixture.
LED lamp off
There is no signal output to the main
control board PWM.
Replace the main control board or repair.
No output to the drive board LED +/ LED-
or drive board over-current, check line
connector if contact bad.
Reconnect the terminal, replace the driver board
Normal end of LED lamp life, bad welding
or poor heat dispersion.
Repair or replace LED light source or replace the whole piece of
aluminum board, remove the cooling system failure.
Decreased
brightness,
uneven pattern
projections
LED lamp aging, check the service time of
LED light source, test LED drive board’s
current.
Replace the LED light source or adjust the drive board’s current.
Reduce LED’s brightness.
Excessive dusts or smudges on the effect
assembly, focus module and objective
lens.
Follow the instructions stated in this user manual to clean the effect
assembly, focus module and objective lens.
Damaged or deformed effect assembly,
focus module or objective lens.
Replace the damaged or deformed components.
