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7-1
7. MAINTENANCE AND TROUBLE-
SHOOTING
This chapter describes maintenance and troubleshooting procedures to keep the
equipment in good condition and restore normal operation in case of trouble.
7.1 Periodical Maintenance
Check item Checkpoint Countermeasure
Cable (Connector) Check that all cables are
connected tightly and free
of corrosion.
If necessary, connect loos-
ened cables, etc. If a cable
is damaged, replace imme-
diately.
Ground terminal Check that the ground wire
connected to the terminal is
tightly fastened and the ter-
minal is free of dust, dirt
and rust.
Remove dust and dirt from
the terminal. Tighten the
wire if it has loosened.
Communications unit
Handset
Check that there is no dust
or dirt on the unit.
Clean the unit with a soft,
dry cloth. If the unit is very
dirty, clean with water-dilut-
ed mild detergent and soft
cloth. Wipe unit with clean
cloth after on a wet cloth
then with a dry cloth. Do not
use alcohol or paint thin-
ners, as they can remove
writing and marks on the
panel.
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
This equipment uses high
voltage that can cause
electrical shock.
0nly qualified persons can
work inside the equipment.
NOTICE
D
o not apply paint, anti-corrosive
sealant or contact spray to plastic
parts or equipment coating.
Those items contain products that can
damage plastic parts and equipment
coating.