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<blockquote data-quote="BombedOne" data-source="post: 622855" data-attributes="member: 300998"><p>Generally, sony tv's from year 2002 (maybe later, don't remember exactly, have to check service manuals) have special interface, to which, in the service, they connect special set of controls, and using them for adjustment. Hovever, check your FBT (flyback transformer), mostly it has 2 knobs, one adjusts overal "brightness", while 2nd adjusts "focus" (in reality they both just change voltage on apropriate electrodes of the tube), but, as I can guess from your post, what you're facing is general loss of emission by cathode, so fiddling with FBT won't help at all.</p><p></p><p>Lost emission is not uncommon even to modern CRT tv/monitors. For example I have an LG 17' Monitor, manufactured in Q3'2006. For today, it's emission current is about 20% of original.</p></blockquote><p></p>
[QUOTE="BombedOne, post: 622855, member: 300998"] Generally, sony tv's from year 2002 (maybe later, don't remember exactly, have to check service manuals) have special interface, to which, in the service, they connect special set of controls, and using them for adjustment. Hovever, check your FBT (flyback transformer), mostly it has 2 knobs, one adjusts overal "brightness", while 2nd adjusts "focus" (in reality they both just change voltage on apropriate electrodes of the tube), but, as I can guess from your post, what you're facing is general loss of emission by cathode, so fiddling with FBT won't help at all. Lost emission is not uncommon even to modern CRT tv/monitors. For example I have an LG 17' Monitor, manufactured in Q3'2006. For today, it's emission current is about 20% of original. [/QUOTE]
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