Cooper Bussmann 858 - Manual (Page 22)

DOCUMENT 1025
REV. H
Instruction Manual
AGS-LED
858 LED Series
Sizes 1, 2, 3, 4 and 5
13
10.6 Checking LED MODULE Cable Connections
WARNING:
WARNING
Failure to turn off power to the sign and wait five minutes could result
in severe injury or death.
Turn off power to the sign by turning off the corresponding Constant Current Regulator (CCR) power.
(WARNING: Wait five minutes after sign power is turned off to service the sign. This will allow
any residual high voltage stored in Power Supply PCB components to bleed off.) With your
multimeter set to DC Volts, verify that the Power Supply Output Voltage is less than 30-VDC at TP6
(Positive lead) and TP3 (Negative Lead) as indicated in Figure 22. If the Power Supply Output Voltage
is greater than 30-VDC, then you must wait until the Power Supply Output Voltage drops below 30-VDC
before you proceed with the next step.
The LED MODULES are electrically wired in series. This means that if any of the cable connectors are
improperly seated in their respective LED MODULE housing, then no current can flow through any of
the LED MODULES and subsequently the sign will not light. Therefore, verify that all cable connectors
are properly seated in their housing and that the output of one LED MODULE (indicated by the outward
pointing arrow at the LED MODULE connector Figure 7) is connected to the input of the next LED
MODULE (indicated by the inward pointing arrow at the LED MODULE connector- Figure 7).
The Last LED MODULE in the series string is terminated with a black return connector & cable
assembly(See Figure 7-11). Verify that the black terminator cable connector is properly inserted into the
connector housing at the Last LED MODULE output connector (indicated by the inward pointing arrow).
10.7 Checking the First LED MODULE
WARNING:
WARNING
Failure to turn off power to the sign and wait five minutes could result
in severe injury or death.