DOCUMENT 1025
REV. B
Instruction Manual
858 LED Series
Sizes 1, 2, 3, 4 and 5
Turn on main power to the sign. If LED MODULES #1 to #5 momentarily light and theen turn off, then the LED MODULE #5 and the cable from the LED MODULE #4 to the LED MODULE #5 are operating normally.
WARNING
WARNING:
Failure to t urn off power to the sign and wait five minutes could result in severe injury or death.
Turn off main power to the sign. Wait five minutes for the high voltage to dissipate. Verify that Power Supply Output Voltage meeasures less than
return cable connector with the LEDD MODULE #5 output cable connector. Replace thee black return cable connector into the output connnector housing of the 6th LED MODULE.
If the sign does not light at all, then replace the LED MODULE #5 and/or the cable con necting from the output connector of LED MODULEE #4 to the input of LED MODULE #5 (see Section 10.10). Then repeat the test as described in this seection.
10.10 Replacing an LED MODDULE
In the case where an LED MODULE has failed and needs to be replaced use the following instructions:
INSTRUCTIONS FOR REPLAC ING AN LED MODULE
The following instructions assumme that the sign front face is removed and that th e failed LED MODULE has been previously iddentified.
WARNING
WARNING:
Failure to t urn off power to the sign and wait five minutes could result in severe injury or death.
1.Turn off power to the sign by tuurning off the corresponding Constant Current Regullator (CCR) power. (WARNING: Wait five minutes after sign power is turned off to servicee the sign. This will allow any residual high vooltage stored in Power Supply PCB components to bleed off.)
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