Applica RV500C : Technical information : Page 111

2.3.2.2.1 Modes 1, 2, and 3 checks

These symptoms relate to operating the display in mode 1, 2, or 3 with a

crosshatch image displayed.

Refer to "Adjustment Procedures" in topic 2.3.2.3 when adjustments are

required.

Refer to "Display-Specific Removals and Replacements" in topic 2.3.1 for

removal and replacement procedures.

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¦ Symptom ¦ Action ¦

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

¦ Displayed image width ¦ Adjust RV600. If symptom persists, regulator ¦

¦ is too large or too ¦ is faulty. Replace card assembly. ¦

¦ small. ¦ ¦

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

¦ height is too large ¦ preamplifier is faulty. Replace card ¦

¦ or too small. ¦ assembly. ¦

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

¦ Color purity of ¦ Degauss circuit or video blanking circuit is ¦

¦ displayed image is ¦ faulty. Replace card assembly. ¦

¦ poor. ¦ ¦

¦ ¦ Or, ITC defective, replace ITC. ¦

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

¦ User foreground ¦ Video control circuit or user foreground ¦

¦ control not working. ¦ potentiometer is faulty. Replace card ¦

¦ ¦ assembly. ¦

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

¦ white point is poor. ¦ appropriate. ¦

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¦ East-west pincushion ¦ Adjust RV402 for optimum geometry between ¦

¦ correction is poor. ¦ modes. If impossible, EWPCC selector is ¦

¦ ¦ faulty. Replace card assembly. ¦

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

¦ Displayed image does ¦ Horizontal oscillator frequency is out of ¦

¦ not sync ¦ capture range. If symptom persists, replace ¦

¦ horizontally. ¦ card assembly. ¦

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¦ Displayed image does ¦ Vertical preamplifier is faulty. Replace card ¦

¦ not sync vertically. ¦ assembly. ¦

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

¦ Displayed image is ¦ Adjust RV501 until displayed image is central ¦

¦ wrapped around raster ¦ to background raster. If impossible, PLL is ¦

¦ horizontally. ¦ faulty. Replace card assembly. ¦

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

¦ Displayed image is ¦ Vertical power amplifier supply circuit is ¦

¦ wrapped around raster ¦ faulty. Replace card assembly. ¦

¦ vertically. ¦ ¦

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¦ Background raster is ¦ Adjust RV601. If raster cannot be centered, ¦

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

¦ horizontally. ¦ assembly. ¦

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

¦ Displayed image is ¦ Adjust RV501 until displayed image is central ¦

¦ not centered ¦ to background raster. If impossible, PLL is ¦

¦ horizontally. ¦ faulty. Replace card assembly. ¦

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

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

¦ height varies ¦ card assembly. ¦

¦ excessively between ¦ ¦

¦ modes. ¦ ¦

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

¦ Displayed image ¦ Width regulation is unstable. Repeat actions ¦

¦ appears broken up ¦ for image does not sync horizontally, or is ¦

¦ horizontally. ¦ wrapped around raster horizontally. ¦

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PS/2 Displays Maintenance Manual

Modes 1, 2, and 3 checks

2.3.2.2.1 - 1