I have a 27 inch GE tv model 27GT722 made in 2001. Recently while watching TV the screen has become somewhat blurry and difficult to read the program guide. Is there an adjustment that can be made and if so, how?
If you are comfortable on doing adjustment with working TV then take off back cover of TV and check flyback transformer, there you would see 2 control knobs, upper knob if to adjust focus. rotate it CW or CCW to obtain maximum focus on TV screen. Put back cover and enjoy.
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I got an RCA 27" TV from someone who had moved it to another room but
found it was "blurry" after moving it. I brought it home and tried all
the suggestions I had found online but it was still blurry. I looked
at the back of the TV and found 2 tiny knobs on the right (from the
back view) which I began to fiddle with while looking at the screen.
It fixed the blurriness immediately! I now have a beautiful screen.
The problem could be with your crt base socket, if you know how to solder well and can identify the components and have a knack in dealing with the internals you can fix this yourself. Base socket is the stuff that you connect to the narrow end of the picture tube, you will find a pcb and a plastic connector almost round in shape on that board. Desolder the socket (the plastic connector) and get a new one, exactly the same type and solder this back.
blurry picture is mainly due to focusing voltage is not proper.
1 check & adjust focus control on flyback.
2 check crt base for loose.
3 wire going to focus control on crt base got disconnected due to foreign materials deposit on it.
4 if tv is old possibility of crt getting weak.
ok your problem is the RGB section maybe crack soldered at the RGB try to resoldered it! you seen that at the back of the picture tube they have small board attach at the neck... resoldred all small part, and transistor drivers!!!
Your TV is nearly 10 years old. Over a period of time, the Picture tube has become weak! (Technically, the Electron Emmissions from the Electron Heater Element has become reduced) Permanent solution is to replace it, but the cost will be prohibitive. Best is to get a new TV. Otherwise, take it into a Technician Shop, who will recondition it for a modest fee.
Sounds like theres a leaky capacitor in the screen drive circuit. I have seen this problem also be a gassy crt but was able to clean off the grids of the CRT with a crt/rejuvinator. It happens because of low emmissions in the tube and when white is on thats a mix of all the colors, so the tube works harder. I bet when you whatch a movie and the scene changes suddenly to a white or brite scene the pic looks a little washed out. If this is not the case then I aggree with the Pravin and try it on another TV just to be sure .. This is not a repair for a consumer to do, though however it is only a three year old set you stated, so there should be life left in the tube, so im kinda thinking a capacitor is bad. Seek out a yechnician to check this out for you as a TV is not a place to see it you can fix it or to exoeeriment with. Good Luck