What is the power tolerance for my display?
Displays powered by unregulated supplies require no more than 3% line drop from loaded to not loaded conditions. The transformer taps in the power supply should be set for the best match to the nominal loaded voltage. Tap settings available are 110VAC, 120VAC and 130VAC. A professional should make these adjustments. Displays powered by regulated power supplies can tolerate 5% or more line drop.