Technical information

1.2.3 Basic Function and Pattern Checks and Adjustments

Basic function and pattern checks are diagnostic procedures based on the

self-test. A series of questions about the raster image indicates the

symptom of the problem. Each symptom has an action to resolve the

problem. The actions involve adjusting certain control potentiometers on

the analog or video cards and/or replacing a part of the display.

If any components of the display require replacement, then a series of

adjustments is required to return the display to normal operation. The

IBM Personal System/2 Color Displays Test-Pattern Diskette (part number

41G8502) is used with the display and host PS/2 to help you perform the

adjustments. These adjustments reset normal color, contrast, and other

display functions.

The diagnostic procedures and actions required to return a display to

normal operation vary from display to display. Because the diagnoses and

actions are specific to each display, the detailed function and pattern

checks and adjustment procedures are included under the display type in

"Part II. Display-Specific Service Information."

PS/2 Displays Maintenance Manual

Basic Function and Pattern Checks and Adjustments

1.2.3 - 1