Before You Begin; Removing And Replacing Frus; Fru Identification - Sun Microsystems SPARCstation 2 Service Manual

4

Before You Begin

Removing and Replacing FRUs

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FRU Identification
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Before you replace FRUs, make sure you have done the following:
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Halted your system
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Verified that you have the proper tools
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Removed the expansion units (if any)
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Removed the system unit's cover
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Attached a wrist strap
See Chapter 3 for further information.
This section describes how to remove and replace FRUs. Please read through
the entire set of instructions before removing and replacing a FRU
Caution – Make sure your system is shut off. The green LED at the front of the
system unit should not be lit, and the fans should not be running. Do not
disconnect the power cord from the system unit's power outlet or from the wall
socket. This connection provides the ground path necessary to safely remove
and install the printed circuit boards and components.
Before you attempt to replace or install a new board or module, make sure that
you have the right unit. Figure 4-1 shows a top view of the system unit with
the cover removed. Figure 4-2 shows some of the field-replaceable boards and
the memory module. There are other field-replaceable boards that are
available but not shown in Figure 4-2.
Caution – Printed circuit boards are made of delicate electronic components that
are extremely sensitive to static electricity. Ordinary amounts of static from your
clothes or work environment can destroy the boards.
Handle boards only by the non-conducting edges. Do not touch the
components themselves or any metal parts. Wear a grounding strap when
handling the boards.
SPARCstation 2 Field Service Manual—February 1991
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