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Chapter 9. Removal and Replacement Procedures
Notes:
1. Servicing of the Model 6E4 can be performed with the system either in the vertical
or horizontal position. Servicing of the Model 6C4 is performed with the system in
the rack and placed into the service position. The service position for the Model 6C4
is described in "Placing the Model 6C4 into the Service Position" on page 355.
2. Before performing any of the removal or replacement procedures in this chapter,
read the following danger and caution notices.
In the system you are about to setup or service:
v The ac power interface connector is considered the main power disconnect device.
v This system has redundant power supply capabilities, meaning that it has the ability
to have two power supplies running simultaneously in the same system unit. When
instructed to disconnect the power source, ensure that all power cables have been
unplugged.
DANGER
An electrical outlet that is not correctly wired could place hazardous voltage
on metal parts of the system or the devices that attach to the system. It is the
responsibility of the customer to ensure that the outlet is correctly wired and
grounded to prevent an electrical shock.
Before installing or removing signal cables, ensure that the power cables for
the system unit and all attached devices are unplugged.
When adding or removing any additional devices to or from the system,
ensure that the power cables for those devices are unplugged before the
signal cables are connected. If possible, disconnect all power cables from the
existing system before you add a device.
Use one hand, when possible, to connect or disconnect signal cables to
prevent a possible shock from touching two surfaces with different electrical
potentials.
During an electrical storm, do not connect cables for display stations, printers,
telephones, or station protectors for communications lines.
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