Appendix C: Troubleshooting

35

Hardware Issues

In the several years that the MicroMaster, and now, the MCMaster product line have been in existence, we've accumulated a fair amount of experience with what problems might arise. While no manual can cover every possible contingency, we can cover the most frequently encountered problems here.

System Compatibility Issues

This section describes known problems with various PS/2 systems, and fixes.

Model 80 -- 20 MHz

Some early Model 80 planars do not support busmastership. Needless to say, this creates problems for the MCMaster. IBM has issued two different ECA's (engineering change announcements) ECA #048 and ECA #031, which cover a specified range of planars. Customers who have any of these systems should contact either their dealer or IBM service and have updated planars installed.

Problem 20 MHz systems can be identified in two ways:

By System Board part number: System boards FRU number (part number) 90X7390 or 33F8415, or with no FRU number label, will have the problem. (The FRU number is located near the rear edge of the system board near slots 3 and 4.)

By System Serial Number: Systems with serial numbers equal to or below the following:

Model

System serial number

Systems manufactured in the U.S.

8580-111

72-6101500

8580-121

72-9015000

8580-311

72-6553500

8580-321

72-9215500

Systems manufactured in Australia.

8580-121

90-3100250

8580-321

90-3400600

Systems manufactured in Scotland

8580-M21

55-00LFVW0

8580-X21

55-00WMZ45

8580-111

55-00F6001

MCMaster User’s Guide - Rev. B06

Kingston Technology Company

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Image 41
Kingston Technology MC133PD manual Hardware Issues, Model 80 -- 20 MHz