Paradyne 9820-2M - Manual (Page 210)

Hardware Maintenance (9820-45M)
12-2 9820-A2-GB20-20 June 2000
Cleaning the Front Panel Assembly
The substantial airflow through the unit’s four fans may cause dust to collect on
the outside of the front air vents. When dust becomes visible at the air vents, run
the brush attachment of a vacuum cleaner gently over the front panel to remove
it.
In extremely dusty environments it may be necessary to remove the front panel
assembly to clean the blades of the fans. Refer all service to qualified personnel.
The procedure may be performed while the unit is running.
"
Procedure
To clean the fans:
1. Loosen the captive screws holding on the front panel.
! WARNING:
The fans continue to run until the fan power cable is removed. Keep
your hair and clothes away from the fan blades.
2. Carefully pull the front panel toward you.
3. Remove the fan power cable and LED ribbon cable.
4. Lay the front panel face-down on a flat surface.
5. Vacuum the fan blades and cages with the brush attachment of a vacuum
cleaner.
! WARNING:
Each fan starts spinning as soon as the fan power cable is
reconnected. Keep your hair and clothes away from the fan blades.
6. Reconnect the LED ribbon cable, then reconnect the fan power cable. Verify
that all four fans are running.
7. Replace the front panel and tighten the captive screws.
CAUTION:
Do not leave the front panel assembly off the unit for extended periods,
or the unit will overheat.