Applica RV500C : Technical information : Page 81

2.2.2.2 Pattern Checks

Select the required pattern to suit the adjustment.

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

positioned correctly and securely.

Refer to "Adjustment Procedures" in topic 2.2.2.3 when adjustments are

required.

Refer to "Display-Specific Removals and Replacements" in topic 2.2.1 for

removal and replacement procedures.

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

¦ Symptom ¦ Action ¦

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

¦ No E-W pincushion ¦ Turn RV201 to check whether readjustment is ¦

¦ correction. ¦ possible; otherwise, replace card assembly. ¦

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

¦ Data not centered ¦ Turn RV200 H.PHASE to check whether ¦

¦ horizontally. ¦ readjustment is possible; otherwise, replace ¦

¦ ¦ the card assembly. ¦

¦ ¦ Note: On units with a metal card tray, first ¦

¦ ¦ adjust RV203 to center the background raster, ¦

¦ ¦ then RV200. If the fault persists, replace ¦

¦ ¦ the CRT. ¦

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

¦ Data will not sync ¦ Replace the interface cable. If the fault ¦

¦ horizontally. ¦ persists, replace the card assembly. ¦

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

¦ Data has insufficient ¦ Turn RV202 WIDTH to check whether readjustment ¦

¦ width. ¦ is possible; otherwise replace the card ¦

¦ ¦ assembly. ¦

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

¦ Data will not sync ¦ Replace the interface cable. If the fault ¦

¦ vertically. ¦ persists, replace the card assembly. ¦

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

¦ Data has insufficient ¦ Turn RV300 HEIGHT to check whether ¦

¦ height. ¦ readjustment is possible; otherwise replace ¦

¦ ¦ the card assembly. ¦

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

¦ Data does not center ¦ Turn RV301 V.CENT to check whether ¦

¦ vertically. ¦ readjustment is possible; otherwise, replace ¦

¦ ¦ the card assembly. If the fault persists, ¦

¦ ¦ replace the CRT. ¦

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

¦ Vertical linearity ¦ Turn RV302 V.LIN to check whether readjustment ¦

¦ poor. ¦ is possible; otherwise, replace the card ¦

¦ ¦ assembly. ¦

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

¦ Horizontal linearity ¦ Replace the card assembly. ¦

¦ poor. ¦ ¦

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

¦ Color(s) missing. ¦ Replace the interface cable. If the fault ¦

¦ ¦ still persists, replace the card assembly. If ¦

¦ ¦ the fault still persists, exchange the CRT. ¦

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

¦ Maximum white point ¦ Make sure the brightness control is in the ¦

¦ is poor. ¦ center detent position. Readjust RV700 ¦

¦ ¦ G.GAIN, RV701 R.GAIN, and RV702 B.GAIN to ¦

¦ ¦ determine whether the correct white color can ¦

¦ ¦ be obtained; otherwise, replace the card ¦

¦ ¦ assembly. ¦

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

¦ Minimum white point ¦ Make sure the brightness control is in the ¦

¦ is poor. ¦ center detent position. Readjust RV800 ¦

¦ ¦ G.CUT-OFF, RV801 R.CUT-OFF, and RV802 ¦

¦ ¦ B.CUT-OFF to determine whether the correct ¦

¦ ¦ white color can be obtained; otherwise, ¦

¦ ¦ replace the card assembly. ¦

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

¦ Convergence poor. ¦ Replace the CRT. ¦

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

¦ Focus poor. ¦ Turn the focus potentiometer to determine if ¦

¦ ¦ readjustment is possible;, if not, replace the ¦

¦ ¦ card assembly. If the fault persists, replace ¦

¦ ¦ the CRT. ¦

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

¦ Colors change or ¦ Install a new signal interface cable, then ¦

¦ flicker ¦ proceed as for 'Color(s) missing' above. ¦

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

Note: To meet required safety standards, repair of the main PCB assembly

and video card assembly is not recommended.

PS/2 Displays Maintenance Manual

Pattern Checks

2.2.2.2 - 1