Technical information

1.2 2. Diagnostic Guide

This chapter describes the procedures for basic diagnoses, function

checks, and self-tests that can be used to pinpoint problems on the

display. The basic diagnostic procedures include initial visual and power

checks; the self-test is a display-powered, on-screen pattern check.

This chapter also introduces general function checks and adjustment

procedures. Complete function checks and adjustment procedures for

individual display types are included in "Part II. Display-Specific

Service Information."

Initial checks for the 8516 Color Touch Display appear in "8516-Specific

Information" in topic 2.4. The general initial checks included here for

all other displays do not apply to the 8516 Touch Display.

DANGER

+------------------------------------------------------------------------+

¦ Areas of the analog and video card assemblies that you will be ¦

¦ removing and replacing carry high voltages. Use extreme caution when ¦

¦ carrying out the removal and replacement steps and while adjusting the ¦

¦ display when it is on. ¦

+------------------------------------------------------------------------+

CAUTION:

Use extreme caution when making adjustments with the display powered on;

these adjustments should not be performed unattended.

The display must never be left unattended with the covers removed and

powered on in a customer environment.

To prevent electrical shock, power off the display and disconnect the

power cord before you change any part.

High voltages may remain on the anode of the CRT after the display is

powered off. Discharge in accordance with CRT safety instructions. See

"High Voltage Discharge Procedure" in topic 1.3.4 for instructions on how

to discharge the CRT.

CRTs are under vacuum. All persons working near an exposed CRT must wear

safety glasses and long-sleeved clothing (or comparable protection).

Subtopics

1.2.1 Initial Checks

1.2.2 Self-Test

1.2.3 Basic Function and Pattern Checks and Adjustments

1.2.4 Degaussing

PS/2 Displays Maintenance Manual

2. Diagnostic Guide

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