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When I change from 405 to 625 the picture
breaks up horizontally. This cannot be cleared with the line hold control. If the preset line hold control inside the set is altered, I get a perfect picture. When changing back to 405 the control has to be reset.-E. Lawrence (Bulwark, Chep- stow, Mon.). We feel that the trouble lies in the preset and main control line holds. Carefully adjust the main
control for 405 -line lock and then the preset for 625 -line lock. This should balance the circuits over the two standards. If not, then there may
be a change in value of an associated resistor or capacitor.