DEC DECstation 5000 Model 100 Series, Руководство по обслуживанию

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Replacing a System Module and Chassis
To replace a system module and chassis, transfer the removable
parts from the old system module onto the new system module.
Warning:
The system module and chassis are one unit. Never remove
a system module from the chassis. Removing the system module from
the chassis destroys the system module compliance with FCC radio
emission regulations.
Never touch the system module heat sinks. The heat sinks are fragile
and break easily.
Figure 5-2 shows how to remove parts attached to the old
system module.
Figure 5-3 shows how to install these parts on the new system
module.
To remove parts from the old system module,
1.
Turn off the system unit.
2.
Remove the system unit cover and front cover plate. Refer
to Chapter 2 for directions.
3.
Disconnect any cables attached to the back of the system
unit. For directions, refer to the to the TURBOchannel
Maintenance Guide.
4.
Remove any option modules attached to the system module.
Refer to the TURBOchannel Maintenance Guide for
directions.
5.
Remove and save the memory module retaining bar.
6.
Remove any memory modules attached to the system unit.
Refer to ‘‘Removing and Installing a Memory Module’’ later
in this chapter for directions.
7.
Remove the power supply. Refer to ‘‘Power Supply’’ later in
this chapter for directions.
8.
Remove the ESAR address chip from the old system
module. Refer to ‘‘Removing and installing an ESAR chip’’
later in this chapter for directions.
5–4 Basic Hardware