Service manual

GS160/320 Component Removal and Replacement 4-3
Table 4–1 lists the various power and mechanical hazards in the system. Use
caution when servicing these systems.
WARNING: When the system is off and plugged into an AC outlet,
Vaux is still supplied to the system. To remove all power, unplug
the AC input box(s) or trip the main circuit breaker on the AC
input box(s).
WARNING: If you power off a partition with the SRM power off
command and the system has a backed up master SCM, then if
the master SCM fails or the PCI containing it is powered off, the
redundant SCM will power up the partition. To prevent
inadvertent partition power-up, put the PSM switches in the
QBBs that make up the partition in the service position.
WARNING: Remove all jewelry when working on the system.
CAUTION: To prevent a remote user from powering on a system or partition
while you are working on it be sure to put the OCP switch in the Off
or Secure position. And, if necessary, put the PSM switch(s) in the
Service position. See the warning above.
CAUTION: Always wear an antistatic wrist strap when working on the system.
Wrist straps are located on the front and rear doors of system
cabinet 1, on the rear door of the power cabinet, and on the front
and rear doors of the GS80.