22
22
Allegiant
®
Tow Discrete Light Bar
Federal Signal
www.fedsig.com
Maintaining and Servicing the Allegiant
Reinstalling the Dome
To reinstall the dome:
1.
Reinstall the dome. To prevent cross-threading the barrel nuts, back them
counterclockwise until you hear the click of the threads engaging.
2.
Tighten the barrel nuts to 16-24 in-lb.
Replacing a PCB
The Allegiant
®
61-inch light bar has two end, two center, and two intermediate ROC
PCBs as well as a controller PCB (Figure 7).
They are configured at the factory per the
customer order. The end and intermediate ROC PCBs snap onto a common reflector.
STATIC SENSITIVE DEVICE: This light bar circuitry can be damaged by
electrostatic discharge (ESD). Follow anti-static procedures when servicing
this light bar.
Figure 6 Locations of ROC PCBs
FRONT OF BAR
END PCB
END PCB
INTERMEDIATE
PCB
CTR PCB
CONTROL PCB
PS
DS
INTERMEDIATE
PCB
CTR PCB
Figure 7 ROC Connections
Tool required:
• T27 Torx driver
