TM 11-7025-234-23
Section Ill. MAINTENANCE PROCEDURES
The individual maintenance procedures in this section contain the corrective
actions required to fix a failure which was isolated during troubleshooting.
Modem boards are sensitive to dirt, smoke, static and humidity. Follow the rules
below to avoid damage to the equipment.
a.
Make sure hands, hair, clothing, and shoes are clean before working on the
modem assembly.
Do not touch board connector terminals with any tool, bare hands, or a dirty
b.
cloth. Tools will damage the fragile connector. Dirt or body sweat will
cause corrosion.
Hold boards by their edges whenever you handle them.
c.
If a board is to be transported, place it in its original shipping container
d.
with antistatic packing. If unavailable, pack it carefully with clean
packing material that will prevent physical damage and will not cause
corrosion.
e.
Ground your body to discharge static electricity by touching a metal chassis
or cabinet before touching a board. A static discharge from you to a board
can destroy integrated circuits on the board. Use a ground wrist strap if
available.
f.
Store and ship boards in static free bags.
Store boards in a humidity controlled environment,.
g.
Do not smoke in the area where boards are used or stored.
h.
Do not put beveraqes on or near boards.
i.
An accidental spill can cause
corrosion and chemical damage.
Never leave boards lying around unprotected.
.j.
Do not use masking tape labels.
k.
4-10. MAINTENANCE PROCEDURES
Before ,you start a corrective maintenance procedure, you should gather all the
items or help listed in the initial setup box for that procedure. Read the
procedure carefully and do only what each step tells ,you to do. Some steps are
followed by a reference. Use the reference any time ,you are not sure what you must
do for that step. Always do the steps in the order they are given unless the
procedure requires decision steps. When decision steps are involved, go in the
order indicated by the decision.
