Maintaining and Servicing the Integrity
38
Integrity Light Bar
Federal Signal
www.fedsig.com
Figure 16 Locations of ROC PCBs
290A7481
CONTROLLER
END PCB
END PCB
INTERMEDIATE
PCB
INTERMEDIATE
PCB
Tool required:
• T27 Torx driver
Removing a PCB
To remove a PCB:
1.
Disconnect all power to the light bar.
2.
Use a T27 Torx driver to remove the 1/4-20 Torx-head barrel nuts securing the lens.
See Figure 15 on page 37. Carefully remove the lens and cover as a unit. Avoid
damaging the lip seal.
3.
Verify that an O-ring is under the head of each barrel nut and not stuck to the lens.
Use a wooden or plastic pick to carefully remove the O-rings from the lens to prevent
damaging them.
4.
Inspect the O-rings and the lip seal for deformation, brittleness, cuts, or tears. To
maintain watertightness, replace a questionable O-ring or seal.
5.
Note and record the connection to the PCB, then lift it and disconnect the harnesses.
6.
Remove the PCB from the light bar.
Reinstalling a ROC PCB
To reinstall a PCB:
1.
Place the new PCB in the same position as the old PCB and reconnect the harnesses.
2.
Reinstall the lens with the cover. To prevent cross-threading the barrel nuts, back them
counter-clockwise until you hear the click of the threads engaging, then tighten them
to 16-24 in-lb in the sequence shown in Figure 15 on page 37.
3.
Reconnect power to the light bar.
