All troubleshooting procedures should begin with an LED and cable connection check. DMX cables are often the cause of scroller problems.
Symptom: |
Possible Cause: |
Solution: |
| Scrollers have no power. All RED LED's out. |
24V DC power supply is not plugged in. |
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Check if PSU main power LED is on. Plug PSU into non-dimmed circuit.
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| Single scroller power indicator is off (RED LED). |
4-pin XLR cable has a broken connection. |
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Replace 4-pin XLR cable with a known working piece of cable.
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Swap between units to verify condition of suspected cable.
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| MXR display window flashes. |
DMX control signal not connected. |
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Verify that DMX is present from console to power supply.
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| MXR operates irratically. |
Faulty DMX. |
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Verify that 4 pin cable runs from last MXR back to power supply.
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Verify that DMX terminator is being used on the last DMX device in the control circuit.
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| One or more scrollers are resetting when moving at high speed |
Voltage has dropped below acceptable level |
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Check that the return cable has been installed.
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Check that maximum cable length has not been exceeded or too many scrollers on circuit.
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| DMX indicators (GREEN LED) on all scrollers are off. |
No DMX is present at the PSU. |
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Check that the DMX cable is properly connected to DMX input on the PSU.
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Check that the DMX indicator light, located on the PSU, is on.
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| DMX indicators (GREEN LED) on one group of scrollers are off. |
One output of PSU has failed. Faulty XLR 4-pin cable at PSU output. |
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Test the condition of cables with known working cables. Replace as necessary.
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| Rattling sound when gel string advances. |
Loose thumbscrews on top of fixture. |
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Tighten thumbscrews with fingers until snug.
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| DMX indicator (GREEN LED) flashes slowly. |
Motor or gel string is jammed. |
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Inspect scroller for roller obstruction or disconnected gel roller. Replace onto roller bearing. Remove debris..
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| DMX indicator (GREEN LED) flashes quickly. |
Broken gel sting. Inspect gel string rollers. |
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Tape string back onto roller or frames back together with gel tape.
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| Gel string is noisy, wrinkled or has a hole in center of frame |
Lamp was powered before scroller fan. LOW fan speed has been set. |
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Always power scroller before lamp. Add Apollo Gel Shield to scroller. Set fan speed at HIGH. Replace gel frame or string.
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| Gel string and rollers stop when reset. |
String tension has become too loose between rollers. |
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Power down the scrollers at mains or XLR connector, and then re-apply power.
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