Removal and Replacement Procedures
3–5
3.3 Removing and Replacing the FRUs
Logic modules are removed directly from the bridge and do not require the prior re-
moval of any other assembly. The removal of the other FRUs requires first removing
the card cage assembly from the bridge enclosure for access.
WARNING
!
Lethal exposed voltages exist in the power supply.
Therefore, always disconnect the ac power cord be-
fore removing or replacing any FRUs. Do not apply
power to the bridge unless the card cage is fully inserted
in the bridge enclosure. Only qualified service engi-
neers should perform any FRU removal and replace-
ment procedures.
CAUTION
!
Modules in the bridge can be damaged by electrostatic
discharges (ESD). When working inside the unit, al-
ways use a grounded wrist strap (ESD strap) and a
grounded work surface. A wrist strap, ground wire, and
table pad are included in the field service kit (P/N
29-11762-00).
3.3.1
Tools Required
The only equipment required to remove and replace FRUs is a #2 Phillips-head
screwdriver and the ESD strap mentioned in the CAUTION note above.
3.3.2
Removing and Replacing Logic Modules
This section describes how to remove and replace any of the four logic modules in
the bridge.
