6.0 Removals and Replacements
This section contains information on removals and replacements, and
¯ The arrows in the "Removals and Replacements" section show the
direction of movement to remove a field replaceable unit (FRU), to
turn a screw to release the FRU. The arrows are marked in numeric
order to show the correct sequence of removal.
¯ When other FRUs must be removed before removing the failing FRU, they
are listed at the top of the page. Go to the removal procedure for
each FRU listed, remove the FRU, and then continue with the removal of
¯ To replace a FRU, reverse the removal procedure and follow any notes
that pertain to replacement. See "Locations" for internal cable
connection and arrangement information.
Before removing any FRU, power-off the system, unplug all power cords from
electrical outlets, remove the battery packs, then disconnect any
The battery pack contains small amounts of nickel and cadmium.
disassemble it, throw it into fire or water, or short-circuit it.
of the battery pack as required by local ordinances or regulations.
The hard disk drive has sensitive parts.
it can cause damage to, and permanent loss of data on, the hard disk.
Before removing the hard disk drive, have the user back up all the
information on the hard disk.
The system board and adapters are sensitive to, and can be
damaged by, electrostatic discharge.
Establish personal grounding by
touching a ground point with one hand before touching these units.
An electrostatic discharge (ESD) strap may be used to establish
1010 Keyboard and Top Cover
1030 Indicator Card and Speaker
1070 Keyboard Control Card
1080 Display Control Card
1090 System Board and I/O Panel Assembly
1120 Communication Adapter
IBM PS/2 Model CL57 SX HMR
Removals and Replacements
_ Copyright IBM Corp. 1991