Applica RV500C : Technical information : Page 52

2.1.2.2 Pattern Checks

These symptoms relate to operating the display with a crosshatch pattern

displayed.

Before starting any checks, ensure that all plugs and connectors are

positioned correctly and securely.

Refer to "Adjustment Procedures" in topic 2.1.2.3 when adjustments are

required.

Refer to "Display-Specific Removals and Replacements" in topic 2.1.1 for

removal and replacement procedures.

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

¦ Symptom ¦ Action ¦

+-----------------------+------------------------------------------------¦

¦ Displayed image width ¦ Adjust RV303. If symptom persists, replace ¦

¦ is too large or too ¦ card tray assembly. ¦

¦ small. ¦ ¦

+-----------------------+------------------------------------------------¦

¦ Displayed image ¦ Adjust RV400. If symptom persists, replace ¦

¦ height is too large ¦ card tray assembly. ¦

¦ or too small. ¦ ¦

+-----------------------+------------------------------------------------¦

¦ Color purity of ¦ Check degauss circuit. Ensure that P100 is ¦

¦ displayed image is ¦ connected. Power off for 30 minutes. Power ¦

¦ poor. ¦ on again to check degauss action. If symptom ¦

¦ ¦ persists, replace card tray assembly. ¦

¦ ¦ ¦

¦ ¦ ITC defective. Replace ITC. ¦

+-----------------------+------------------------------------------------¦

¦ Contrast or ¦ Check connections between P400 and P802. If ¦

¦ brightness controls ¦ good, replace card tray assembly. ¦

¦ are not working. ¦ ¦

+-----------------------+------------------------------------------------¦

¦ Maximum or minimum ¦ Video color point is not set. Adjust as ¦

¦ white is poor. ¦ appropriate. ¦

+-----------------------+------------------------------------------------¦

¦ East west pincushion ¦ Adjust RV302 for optimum vertical lines. If ¦

¦ correction (EWPCC) is ¦ this is not possible, replace the card tray ¦

¦ poor (vertical lines ¦ assembly. ¦

¦ are bowed or barrel ¦ ¦

¦ shaped). ¦ ¦

+-----------------------+------------------------------------------------¦

¦ No horizontal or ¦ If good with test raster (signal cable ¦

¦ vertical ¦ disconnected), replace signal cable. ¦

¦ synchronization. ¦ ¦

¦ ¦ ¦

¦ One or more colors ¦ ¦

¦ missing. ¦ ¦

+-----------------------+------------------------------------------------¦

¦ Displayed image does ¦ Ensure that P300 is connected. If symptom ¦

¦ not synchronize ¦ persists, replace card tray assembly. ¦

¦ horizontally. ¦ ¦

+-----------------------+------------------------------------------------¦

¦ Displayed image does ¦ Ensure that P300 is connected. If symptom ¦

¦ not synchronize ¦ persists, replace card tray assembly. ¦

¦ vertically. ¦ ¦

+-----------------------+------------------------------------------------¦

¦ Displayed image is ¦ Adjust RV304. If image cannot be centered, ¦

¦ not centered ¦ centering circuit is faulty. Replace card ¦

¦ horizontally. ¦ tray assembly. ¦

+-----------------------+------------------------------------------------¦

¦ Displayed image ¦ Height selection circuit is faulty. Replace ¦

¦ height varies ¦ card tray assembly. ¦

¦ excessively between ¦ ¦

¦ modes. ¦ ¦

+-----------------------+------------------------------------------------¦

¦ Displayed image ¦ Width regulation is unstable. Ensure that ¦

¦ appears broken up ¦ P300 is connected. If symptom persists, ¦

¦ horizontally. ¦ replace card tray assembly. ¦

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

PS/2 Displays Maintenance Manual

Pattern Checks

2.1.2.2 - 1