Esd Grounding - Nokia 7705 SAR-Hm Installation Manual

SAR-Hm and SAR-Hmc Chassis Installation Guide
Warning:
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.
2.4.1.1
When a 7705 SAR-Hm or 7705 SAR-Hmc chassis is properly installed in a grounded
equipment rack, the rack provides ESD grounding for the chassis. Before a
7705 SAR-Hm or 7705 SAR-Hmc chassis is installed, connect the ESD wrist strap to
a grounded rack or other ground point. After the chassis is installed in a grounded
rack or cabinet, connect the anti-static wrist strap to the ground point on the front of
the chassis, as shown in
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• ESD damage can occur if components are mishandled. The 7705 SAR-Hm and
7705 SAR-Hmc chassis must be properly grounded. The grounding point is located at
the bottom of the chassis faceplate.
• 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-Hm,
7705 SAR-Hmc, or the 35W High Voltage Power Supply.
• 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 MΩ, 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.
• Do not use synthetic bristled brushes or acid brushes to clean units.
• Handle failed units with the same precautions as working units.

ESD Grounding

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Figure 2 and Figure 3.
Mandatory Regulations
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