OSRAM SYLVANIA BackLED MB - Manual (Page 4)

4
4.0 Troubleshooting Guide
Problem Possible Cause Corrective Action
Entire sign does not light No input power Check AC connection to power supply.
Entire sign/one or more LED
runs do not light
No power to LED
modules
Check power supply connection to modules.
Check DC polarity- power supply red output wires must be
connected to red striped module wires, power supply blue
output wires must be connected to gray striped module wires.
Verify power supply output voltage is 12V +/- 1.0V
Part of an LED run does not
light
No power to that run Check module to module connection for correct polarity.
One module does not light
Module has been
damaged
Replace the module. Observe correct polarity.
Specifications subject to change without notice
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