Intergraph DHAF02430, Справочное руководство системы

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WARNING Setting processor voltage incorrectly may destroy the processor! Refer to Chapter 6, “System
Board MSMT378,” for details.
To replace the processor module:
1. Remove ISA cards if installed.
NOTE Pentium Pro processor modules do not require heat sink support.
2. Remove the top section of the heat sink support, if necessary. The plastic support bar has a tab
on each end. Press both tabs inward, towards each other, while using a pulling motion to pull the
bar away from the heat sink fins. The support assembly is permanently connected to the system
board, and need not be removed.
3. Remove the processor module. Grasp both tabs on the top corners of the processor module and
press them inward, towards each other. Then pull the entire module upward, keeping the tabs
pressed inward. Heat sinks are permanently connected to the module, and need not be removed.
4. If necessary, set the frequency for the new processor by adjusting jumpers J47 through J50. Refer
to Chapter 6, “System Board MSMT378,” for more information.
5. Align the new processor module over the S1 slot and firmly press it down into the slot.
6. If necessary, replace the top section of the heat sink support. Gently push the plastic support bar
toward the four posts on the heat sink support assembly, until the bar snaps into place.
7. Reinstall the ISA cards.
System Board
Replacement system boards contain pre-installed voltage regulator modules and processors. However,
you must swap the memory modules and P6 bus termination card (on MSMT353 or MSMT359) or
processor module from the old system board to the new one.
NOTE Steps 10 and 14 apply only to the the MSMT353 or MSMT359 system board.
The telescoping (modular) chassis makes it easier for you to replace the system board. You must
remove the unit from the rack before replacing the system board.
WARNING Two people must remove the unit from the rack. Failure to do so can result in personal injury
and equipment damage. The unit is heavy and difficult to handle.
To replace the system board:
1. Disconnect all external cables from the unit and remove it from the rack. Use a helper!
2. Open the base unit as described in Chapter 1.
3. Remove the riser card and any installed option cards as described earlier in this chapter.
4. Remove the five screws securing the telescoping section to the base unit. There are two screws
on the right and three on the left.
5. Pull the telescoping section toward you a few inches.
6. Disconnect all internal cables attached to the system board. Note the locations where the cables
are connected.
7. Remove the telescoping section from the base unit.
8. Remove the jackscrews from the parallel and serial ports, and from the three audio jacks.