C
HEETAH
S
ERIES
S
WITCHERS
–
C
HAPTER
12
81-9059-0570-0
Rev. C
Proprietary Information of
PESA
S
WITCHING
S
YSTEMS
,
I
NC
.
186
3.
Loosen the two, nylon-retaining thumbscrews that secure the fan to the chassis and
carefully, remove the fan assembly.
4.
Reinsert the new fan assembly and secure using the two, nylon-retaining thumbscrews.
When replacing fans during energized system conditions, be aware that the
new fan replacement will energize upon power reconnection.
5.
Reconnect the fan power cord to the corresponding power connector (see Figure 95).
6.
Reinstall and secure the filter/breaker panel assembly.
•
Earlier Design Cheetah 512 and 1024 Series Upper-Bottom Fan Replacement Procedure
These fan assemblies are installed behind specific airflow baffles (see Figure 95) that direct
the airflow for maximum efficiency. The baffles must be removed before you can access the
fan assemblies for replacement.
Perform the following sequence to replace a fan assembly:
For the Original Design Cheetah 512 and 1024 Series switcher systems that
are to remain energized during a fan replacement sequence, it is extremely
important to remove all personal conductive materials (e.g., watches, rings,
and bracelets) during the replacement sequence. Additionally, exercise
extreme caution as to not drop any tools and/or parts that could reach the
active components (DC bus, boards/cards, etc.) in the chassis.
1.
Remove the filter/breaker panel assembly to access the upper bottom fan baffle plates
and fan assemblies (see Figure 95).
For specific baffle removal instructions, contact a PESA Customer Service
representative prior to attempting to remove either of the upper-bottom fan
baffle assemblies.
2.
Remove the specific baffle assembly (see Figures 95 and 96) associated with the fan
that is to be replaced by loosening the baffle assembly’s retaining thumbscrew and
carefully, direct the baffle assembly through the front of the chassis.
Summary of Contents for Cheetah 1024x256
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