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16
Replacing the SLC/Now! Processor Upgrade Card
To remove your SLC/Now! from your IBM PS/2 and restore the system with your original 80286
microprocessor, simply follow these steps:
1.
If the CONFIG.SYS has been modified to enable the cache (for either DOS or OS/2 2.0 version),
remove the line or make it a REM statement.
1.
Set the power switch on the system unit to OFF.
2.
Set all external power switches off, (i.e. display, printer, etc.).
3.
Unplug the system unit's power cord from the power outlet.
4.
Disconnect all power cords from the rear of your machine.
5.
Move your keyboard and all external options away from the work area.
6.
Position the unit to allow access to the rear.
7.
Using a flat-blade screwdriver, remove the cover mounting screws.
8.
For Models 25, 30, 50, 50Z: Unlock the system cover and carefully slide the system unit's cover
away from the rear and to the front. When the cover will go no further, tilt it up, remove it from the
base and set it aside.
For Model 60: Lay the tower system unit on its side and remove the side panel
9.
Unscrew and remove any micro-channel adapter boards, being careful to note their position.
10.
Hold the SLC/Now! gently on the edges and pull upwards, while rocking side to side, being careful
not to bend any pins. Be sure to note the position of pin 1, (pin 1 of the 80286 must be inserted into
pin 1 of the socket).
Place the SLC/Now! in the original packaging material and contact your dealer or IBM for repair
or replacement.
11.
If you are restoring the 80287, align pin 1 on the 80287 with pin 1 of the socket and press into place,
being careful not to bend the pins.
12.
Replace the 80286 microprocessor, be careful to align pin 1 of the chip with pin 1 of the socket.
13.
Return adapter boards to their original positions as noted previously, being certain to tighten the
screws.
14.
Replace the cover and reattach all cables and power cords.
15.
Turn on power to your PS/2, check that it boots successfully. (If you are changing the system's
configuration, reconfigure the system using the backup copy of your IBM Reference diskette
containing the configuration files for any microchannel adapters installed in the system).
16.
If your PS/2 does not boot, check that the 286 is firmly inserted into the 80286 socket.
SLC/Now! Installation Guide - Rev. D1
Replacing the SLC/Now!
Kingston Technology Corporation
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