Technical Manual

Chapter 5 • Maintenance
D C U M a i n t e n a n c e a n d O p e r a t i o n M a n u a l 35
Tools & Equipment Required
The tools listed below are recommended for the maintenance and repair
procedures in this chapter.
• Band strapping tool
• Phillips head screwdriver
• Inch-pound torque wrench
• Diagonal cutting pliers
Routine Checks
When it is necessary to visit a DCU installation site for maintenance, the following
checklist provides a guideline for performing a thorough visual inspection of DCU
internals.
High voltage hazard. To avoid injury and damage to the unit, take care while
working inside the protective enclosure. Do not touch or allow foreign objects
to touch the AC component.
Component Check For
Cables and wires
Cracked or damaged
Loosened connection
Connectors
Bent or missing pin contacts; corroded or deformed socket
contacts; cracked or chipped connector shell; open circuit
Protective Enclosure
Severe deformation or dents; severe rust especially around
mounting holes
Cellular Antenna
Loosened or unsecured
Damaged
RF antenna
Bent or Damaged
Unsecured or loosened antenna
Fuses
Unsecured connection
Bad fuses
Solar Panel Damage, dirt, or obstructions
PCBs
Loosened or damaged electronic components; damaged circuit
leads; discolored, cracked or chipped PCB
Loosened or damaged plastic tabs
Bands
Loosened or unsecured bands; cracks or severe rust; damaged
or severely bent brackets
Battery
Verify tighten to a maximum of 60 inch-pounds
Corroded
Nuts and Bolts Loosened nuts and bolts