4
6. Troubleshooting
Following are a few common problems that may occur during operation. Here are
some suggestions for easy troubleshooting:
A. The unit does not work, no light and the fan does not work
1. Check the connect power and main fuse.
2. Measure the mains voltage on the main connector.
3. Check the power on LED.
B. Not responding to DMX controller
1. DMX LED should be on. If not, check DMX connectors, cables to see if link properly.
2. If the DMX LED is on and no response to the channel, check the address settings and
DMX polarity.
3. If you have intermittent DMX signal problems, check the pins on connectors or on PCB of
the unit or the previous one.
4. Try to use another DMX controller.
5. Check if the DMX cables run near or run alongside to high voltage cables that may cause
damage or interference to DMX interface circuit.
C. Some units don’t respond to the easy controller
1. You may have a break in the DMX cabling. Check the LED for the response of the master/
slave mode signal.
2. Wrong DMX address in the unit. Set the proper address.
D. No response to the sound
1. Check the unit that is not receiving DMX signal.
2. Check the unit that is not set to display mode
3. Check microphone to see if it is good by tapping the microphone
E. One of the channels is not working well
1. The stepper motor might be damaged or the cable connected to the PCB is broken.
2. The motor’s drive IC on the PCB might be out of condition.
F. The lamp is cutting out intermittently
1. The lamp is not working well. Check the main voltage either too high or too low.
2. Internal temperature may be too high. Check and if necessary replace the fan on the head.
5.5 DMX512 Connection
The DMX512 is widely used in intelligent lighting control, with a maximum of 512 channels.
DMX 512
Termination reduces signal errors and to avoid signal
(Resistance 120 ohm 1/4W) between pin2 (DMX-) and
transmission problems and interference. It is always
3
pin3 (DMX+) of the last fixture.
advisable to connect a DMX terminal.
2
DMX -
1
COMMON
DMX +
3
1
120 ohm 1/4W
2
1
DMX INPUT
DMX OUTPUT
2
3
1
2
3
4
1. If you using a controller with 5 pins DMX output, you need to use a 5 to 3 pin adapter-
cable.
2. At last unit, the DMX cable has to be terminated with a terminator. Solder a 120 ohm 1/4W
resistor between pin 2(DMX-) and pin 3(DMX+) into a 3-pin XLR-plug and plug it in the
DMX-output of the last unit.
3. Connect the unit together in a `daisy chain` by XLR plug from the output of the unit to the
input of the next unit. The cable can not be branched or split to a `Y` cable. DMX512 is a
very high-speed signal. Inadequate or damaged cables, soldered joints or corroded
connectors can easily distort the signal and shut down the system.
4. The DMX output and input connectors are pass-through to maintain the DMX circuit, when
power is disconnected to the unit.
5.
Each lighting unit needs to have an address set to receive the data sent by the
controller. The address number is between 0-511 (usually 0 & 1 are equal to 1).
6.
The end of the DMX512 system should be terminated to reduce signal errors.
