Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 870 / 874

870 Chapter 17 Hardware procedures
241-1501-240 5.2S2
Vacuuming equipment
Vacuum equipment after initial installation of equipment and periodically
thereafter to reduce the risk of damage to electronic parts by the accumulation
of dust.
Prerequisites
• You must be familiar with “Safety considerations and best practices”
(page 53).
• You need a vacuum cleaner with an induction-wound motor, which
reduces the potential for damage of cards or modules by electromagnetic
interference (EMI). Also use a plastic shaft and attachments to prevent
electrical shock and scratching the anti-corrosive coatings on the
equipment.
Procedure steps
1 At the front of the frame or other mounting apparatus, for each
Passport 15000 or 20000 ensure that the cable management channel
cover is closed.
2 At the rear of the frame or other mounting apparatus, for each
Passport 15000 ensure that the fabric casings or levers are closed.
3 Select the long-bristle dusting attachment for the vacuum.
4 While standing on a ladder, vacuum the top of the mounting apparatus.
Use slow brushing motions to prevent masses of dust from falling into the
top of the frame or from being blown around by the airflow exhaust.
5 Vacuum the rear, the sides (if accessible), then the front of the mounting
apparatus, leaving all panels closed.
6 Vacuum in and around the exposed portions of the mounting apparatus,
shelves, and cabling. Be careful not to bump any part of the equipment.
CAUTION
Risk of equipment damage by impact
Never vacuum inside the shelf assembly of any Passport.
Even the gentle impact of a nozzle can bend a backplane
pin. A bent pin means the card slot cannot be used until the
entire shelf assembly is replaced.