DOCUMENT 1218
REV. B
Instruction Manual
AGS-LED
312 LED Series
300mm and 400mm
17
10.5.2 Electrical Inspection
WARNING:
WARNING
There may be dangerous voltage present on the input AC pins of the
power supply on failed signs.
It is recommended that a Ferro style constant current regulator (2.8 to
6.6ARMS) with a 100W isolation transformer or a voltage limited
constant DC current source be used to test failed signs to limit the
input voltage.
A buzzing or humming noise coming from the isolation transformer
may indicate a failed power supply or LED module. It is also an
indicator of dangerous voltage on the primary and secondary sides of
the transformer.
WARNING:
NOTICE
Applying a constant voltage greater than 80V (AC or DC) to the input
will cause damage to the power supply.