CRT:CRT Adjustment Guide

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Official Training Material and Tools

Convergence Adjustment

If the red, green, and blue colors of a single spot on the screen are not properly aligned, you may need to adjust the convergence by turning potentiometers or adjusting convergence rings. Before adjusting convergence, use a marker to draw a line across the rings or potentiometer and a nearby stationary piece so that you can always return the ring to it's initial position to undo changes.

If the colors are only horizontally separated, you likely only need to adjust H STAT, which may have a dedicated potentiometer on the neckboard. Consult your CRT's service manual to identify which potentiometers and rings are which. Once the rings are set properly, you can make the adjustment more permanent using a bead of high temperature rated silicone sealant or aluminum tape.

Ring Name Purpose
Purity Factory set, do not adjust.
V STAT Adjusts vertical alignment of colors.
Misconvergence Only use if issue cannot be fixed completely with H STAT and V STAT.

Below is a video of the convergence adjustment process.

Geometry Cheat Sheets

CRT Adjustment Cheat Sheet.png CRT Adjustment Cheat Sheet 2.png

CLP P DLY

Some Sony PVM or BVM units have a setting called CLP P DLY which can be used to correct large dark lines across the screen.