Alcatel-Lucent 7705 SAR-A, Руководство по установке

Страница: 19 / 154

Mandatory Regulations
7705 SAR-A Chassis Installation Guide 19
The risk of damage to an ESD-sensitive device is reduced considerably after assembly in a
circuit designed to protect sensitive components; however, the following basic precautions
should be taken to reduce ESD to harmless levels.
• Handle all units as if they contained ESD-sensitive devices unless they are known not
to contain ESD-sensitive parts.
• Wear an anti-static ESD strap on your wrist or heel prior to and while touching or
handling units containing ESD-sensitive devices.
• For surfaces with resistance to ground in excess of 100 M
Ω
, such as ordinary tile,
either cover them with properly grounded static dissipative runners or wax them with
a static dissipative wax.
• Store (even temporarily), pack, and ship units in anti-static bags or containers.
• Do not handle units and components unnecessarily. Use the plastic faceplate to
handle circuit boards.
• Do not use synthetic bristled brushes or acid brushes to clean units.
• Handle failed units with the same precautions as working units.
Grounding
When a 7705 SAR-A chassis is properly installed in a grounded equipment rack, the rack
provides ESD grounding for the chassis. Before a 7705 SAR-A chassis is installed, connect
the ESD wrist strap to a grounded rack or other ground point. After the 7705 SAR-A chassis
is installed in a grounded rack or cabinet, connect the anti-static wrist strap to the ESD strap
ground point on one of the ground studs identified by the wrist strap label.
Warning:
• ESD damage can occur if components are mishandled. The 7705 SAR-A chassis and
equipment rack must be properly grounded. A typical grounding point is one of the
ground studs on the 7705 SAR-A chassis or a properly grounded rack or work bench.
• Always wear an ESD-preventive wrist or ankle strap connected to a nearby ground point
that is connected to the site grounding point when working on the 7705 SAR-A or the
100W High Voltage Power Supply.