User's Manual
PAF-19XX-EX-XXX Field Replacement Procedures
044-05298 Rev A 4-5
Rear Mount
Rear mounted fans may be changed without shutting down the system. To replace the fans, shown in Figure
4-3, perform the steps in Table 4-5.
Figure 4-3 Rear Mount Cooling Fan Removal and Replacement
CAUTION: The replacement fan may operate when the power connector is connected.
Ensure that no objects (fingers, screwdrivers, etc.) intrude into the fan area.
Table 4-6 Rear Mount Cooling Fan Removal and Replacement Procedure
Step Action
1. At rear of subrack, pull out snap fasteners that secure defective fan assembly
to fan-mounting bracket
2. Pull fan outward, and disconnect fan power connector
3. See Caution. Install replacement fan assembly in reverse order of removal
DC POWER
+27V
RETURN
0 1 2 3 0 1 2 3
Cooling
Fan
Snap
Fasteners (4)
Power/Sense
Connector
Located Inside
Assembly