Sonnet Technologies Crescendo_7200 Processor Upgrade Card User Manual
Page 7
Hardware Installation—Power Macintosh 8200 (continued)
Figure 24
Figure 25
Figure 27
Figure 26
logic board
logic board
battery
screw
latch
1
2
4
3
5
6
ejector
logic board
DIMM
Figure 23
power button
switch
power button
cable
tab
tab
9. Locate the power button switch in the lower left corner of the computer’s
case and remove it (Figure 23). First, disconnect the power button cable
located behind the switch by gently unplugging it from the logic board.
Then, carefully press in the two plastic tabs and push out the switch. If you
encounter any resistance you may need to slightly wiggle it back and forth
until it pops out of the case. Also note the correct orientation of the switch
for proper replacement when you re-install the logic board. The large pro-
truding button on the switch will be reinstalled on the bottom as you replace
the switch into the computer’s case.
10. Turn the computer’s case around so that the back side of the logic board is
facing you. Identify and disconnect the following logic board cables (from
left to right) on the top of the logic board (Figure 24): 1. hard drive power
cable, 2. floppy drive power supply cable, 3. CD-ROM audio cable, 4. speaker
cable, 5. power supply cable, and 6. SCSI cable.
11. Remove the screw securing the logic board (Figure 24).
12. Remove the logic board from the interior of the computer’s case. Slide the
logic board to the left until the slots on the top of the board line up with the
latches in the case, then lift the latch at the top of the logic board to release it
from the case (Figure 25).
13. Gently tilt the logic board forward and out of the case (Figure 26). Take care
not to tug or force the logic board loose. If you experience any unnecessary
resistance, carefully rest the logic board against the interior of the case and
check to see that you have properly removed the necessary components and
cables from the logic board.
14. Place the logic board on a flat, static-free surface with the components side of
the logic board facing upward and the battery situated in the bottom right
corner (Figure 27).
15. Identify the components on the Power Mac 8200 logic board (Figure 27).
The DIMM slots are located near the bottom right corner of the logic board.
16. Using the information obtained from Apple System Profiler, determine
which DIMMs you will remove or swap from, or install into the logic
board’s DIMM slots (Figure 27), which are labeled J14 - J17. To remove the
DIMMS, push outward and down on the DIMM ejectors. To install DIMMs,
align the notches of a DIMM over the guides of a DIMM slot, then gently,
but firmly press the DIMM straight into the slot until the ejectors snap
completely closed.
17. Set any DIMMs you removed on a flat, static-free surface.
7
Support Note:
Do not touch the DIMMs’ connectors; always handle DIMMs
only by the edges. Please note that DIMMs are designed to fit into the slot only one
way; be sure to align the DIMMs’ notches with the small guides inside the slot.
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.