National Instruments VXIpc-850 Series User manual

VXIpc™ is a trademark of National Instruments Corporation. Product and company names are trademarks or trade names of their respective
companies.
321236B-01 © Copyright 1996 National Instruments Corp. All rights reserved. October 1996
VXIPC-850 PENTIUM UPGRADE
This guide describes how to install the Pentium upgrade CPU card into
the VXIpc-850 embedded computer.
With the Pentium upgrade CPU card, you can upgrade your VXIpc-850
Pentium system to faster performance. For example, you can install a
200 MHz Pentium upgrade CPU card into a VXIpc-850/100 and gain the
same performance levels as the National Instruments VXIpc-850/200.
There are no performance differences between an upgraded module
versus a new one.
What You Need to Get Started
To install the Pentium upgrade CPU card, you will need the following
items.
• Pentium upgrade CPU card
• Thermal interface pad
• 1/4 in. nut driver
• Phillips head screwdriver
Installation Procedure
Step 1. Remove the Original CPU Card
To remove the original CPU card, perform the following steps.
1. Remove the 12 screws from the cover of the VXIpc-850 module.
There are five screws on the top side, three on the right side, and four
on the bottom side. Keep these screws in a safe place.
2. Grasp the cover close to the front panel. Lift the cover upward
slightly to dislodge it from the front panel and slide it backwards,
freeing it from the VXI connectors on the back side.

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3. Remove the expansion card edge support by removing the single
screw.
4. Remove any DRAM SIMMs that are installed in the card. Make sure
to use proper antistatic precautions when handling the SIMMs.
5. Remove the three screws at the corners of the heat sink, but do not
attempt to remove the heat sink yet. Do not remove the two screws in
the middle of the heat sink. Keep the three screws in a safe place.
6. The heat sink is attached to the processor via an adhesive, heat-
conducting pad. Rotate the heat sink back and forth in the plane of
the CPU card to disconnect the thermal pad from the heat sink. If the
thermal pad detaches from the processor instead of the heat sink,
remove the pad from the heat sink. You will not need the thermal
pad.
7. From the four corners of the card, remove the three 1/4 in. standoffs,
three nylon washers, and the screw that attach the CPU card to the
motherboard.
8. Remove the CPU card by pulling it gently and firmly from its
connectors.
Step 2. Install the Upgrade CPU Card
To insert the new CPU card, perform the following steps.
1. Insert the CPU card firmly into the horizontal connectors.
2. Reattach the CPU card with the three 1/4 in. standoffs and three
washers (which correspond to the holes in the corners of the heat
sink), and the screw.
3. Remove the backing from one side of the new thermal pad and place
it on the processor with the adhesive side down.
4. Remove the backing from the other side of the thermal pad and place
the heat sink onto the processor, making sure to line up the mounting
holes at the corners of the heat sink with the matching holes on the
CPU card.
5. Reattach the heat sink to the CPU card using the three screws you
previously removed.
6. Reinsert the DRAM SIMMs into the sockets in the new CPU card. If
you have two SIMMs, you can install them in the two slots closest to
the heat sink or in the two outermost slots.
7. Reinstall the expansion card edge support with the single screw.

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8. Replace the cover on the VXIpc-850 module by sliding the back end
over the VXIbus connectors and rotating the cover back down toward
the front panel.
9. Reinstall the 12 screws into the module through the cover.
The Pentium upgrade CPU card is now installed.