crescendo 7200 G3 Schnellstart-Handbuch - Seite 6

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Hardware Installation—Power Macintosh 8200
This section covers the configuration and installation of the Crescendo/7200 into
the Power Macintosh 8200. If you are installing the Crescendo/7200 into a Power
Macintosh 7200, 7215 or Workgroup Server 7250, go back to page 3.
WARNING:
Only if you plan to remove DIMMs from, or install DIMMs to your
computer, you will be required to remove your system's logic board to gain
access to the DIMM slots. This process requires technical knowledge. If you only plan to add
new DIMMs to the Crescendo card, this will not be an issue. If you feel you are unable to
install the computer hardware, contact a qualified technician.
For the installation of the Crescendo/7200 into a Power Macintosh
8200 from which DIMMs will be installed into or moved from the
computer's logic board, Sonnet strongly recommends that a quali-
fied technician perform the installation.
1. Shut down your computer. If the computer has been on for any length of
time, wait a few minutes for it to cool before beginning the installation.
2. Touch a port access cover on the back of the computer to discharge any
potential damaging static electricity (Figure 18). Disconnect the power and
peripheral cables from the back of the computer.
Support Note:
To avoid generating a static charge in your body, do not
walk around the room until after you finish installing the Crescendo/7200
and close the computer.
3. With the rear of the computer facing you, open your computer by loosening
(not removing) the four security screws on the rear panel (Figure 18).
4. Slide the case cover forward about an inch and gently lift the top cover
straight up to remove it from the computer (Figure 19).
5. With the computer orientated in front of you as shown (Figure 20), identify
its internal components.
6. Lower the PCI card retainer (Figure 21). Slowly squeeze together the two
holding clamps to release the retainer to lower it away from the cards.
7. Depress the small tab near the left leg of the retainer, then slide the retainer
to the right to remove it (Figure 22); you will not reinstall the retainer.
Attention! If you are only adding new DIMMs to the Crescendo, proceed directly
to step 21. Steps 8 to 20 must be completed only if you you intend to remove
DIMMs from the logic board to install onto the Crescendo card, or replace, or
install new DIMMs on the logic board.
8. Remove any PCI cards from the PCI slots (Figure 20).
Support Note:
Remember, you must leave at least 8MB of memory installed
on the system's logic board, and install a minimum of 8MB of memory on the
Crescendo/7200 if you are using System 7.5.3 to Mac OS 8.6. For Mac OS 9 and OS 9.1,
you must leave at least 8MB of memory installed on the system's logic board, and install a
minimum of 24MB of memory on the Crescendo/7200.
security screw
security screw
PCI slots
6
security screw
port access cover
security screw
Figure 18
Figure 19
PCI card retainer
logic board
Figure 20
PCI card retainer
Figure 21
tab
Figure 22