No horizontal red convergence control

When making manual convergence adj. useing the consumer controls ,chassie dptv305f all control options work except red horizontal up ,down will not move at all , red vertical left right works fine , any ideas , suspect acs board ,am I on the right track ? thx. alphauno

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1,284 Answers

Probably the red convergence output IC has failed. The chip is basically a stereo amplifier that serves as a horizontal amplifier and a vertical amplifier. I suspect the vertical part has failed and is not uncommon. Should be generic STK392-150's or maybe STK392-110/120 I believe. By the way when the line moves up and down that means the vertical is working when it moves side to side the horizontal is working.

Posted on Feb 04, 2007

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