Safety Precautions
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2. Safety Precautions for Inspection and Maintenance
WARNING
Turn off power:
Turn off power before attaching or detaching modules or before connecting devices. Failure to do so may
result in electric shock or equipment fault.
Make sure that power is off:
Always check and make sure that the external power is turned off before installing or removing modules. Bare
metals appear on the back of external terminal block of the module. To avoid electric shock, take precautions
against touching them.
CAUTION
Clean filters:
If the equipment has filters, clean them periodically. If it has fans, clean grilles and screens also. Clogged filter
may cause the equipment to overheat, resulting in malfunction, failure or fire.
Avoid shock:
Do not drop, bump or give strong shocks to the equipment or modules to avoid fault. Shocks may cause
malfunction.
Discharge static electricity:
Before handling equipment or modules, discharge static electricity from your body by touching a metal that is
grounded. Static electricity may cause equipment to malfunction or fail.
Use a conductive sheet or bag to avoid static:
When cards and modules are taken out of base-unit, they should be placed on an electrically conductive
sheet (the bag that comes with spare module in it is made of conductive sheet), which is put on a grounded
work bench. Static electricity may damage electrical parts.
Wipe off dirt:
Wipe off dirt and dust from equipment or modules, using a soft cloth. In case the dirt is persistant, wet a cloth
and wring it dry, then use it on the dirt. Dirt on the parts may result in faulty actions and operations.
Do not use paint thinner for cleaning:
Do not use benzene, paint thinner for cleaning equipment or modules. These chemicals will distort or discolor
panels and modules.
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