Question about Televison & Video
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Posted on Jan 02, 2017
SOURCE: convergence problem
We need a better description of what you mean by shadowing. However I am assuming: 1. You mean it ''bleeds'' off to the right when you have something with a hard red/blue drive. 2. When you turn the contrast and color down a bit it gets better. unfortunatly I cannot tell you how to fix convergence, but I can think of some other possibilities. In this case the red/blue emmision of the crt is dying off and going into saturation when driven hard. To fix, replace with a new picture tube/crt. In some cases you can get a little more life out of that tube (with a watchable picture) by having the screen, focus, cathode bias, and drives slightly readjusted. It will take someone with experience in doing these adjustments on a weak tube to get it looking as good as possible. Given the construction of the cathodes (guns) in that crt, only a very low level crt reactivate should be tried on it. The hard rejuv most crt testers give is highly likley to completely destroy the cathode on that crt.
Posted on Mar 27, 2006
Replace STK convergence IC's w/OEM or better parts.Senior tech soldering ability needed. Ex==Steel jumper wires feeding b+ to conv. IC's need resolder to prevent call-back.Also, best re-alignment done in service mode==consult service literature.
Posted on Sep 29, 2007
hey guys here is a great thread on this subject, its were I posted most of my pictures and there is a link to the manual in there. hope this helps,
BTW, IF ANY OF YOU GIVE UP ON YOUR 51MP392H/17 PLEASE LET ME KNOW!!!! I WANT TO BUY YOUR CONVERGENCE BOARD... "I killed mine" email@example.com
Posted on Nov 14, 2008
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