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Main => Monitor/Video Forum => Topic started by: RayB on February 11, 2009, 08:16:21 pm

Title: Odds I could fix my TV?
Post by: RayB on February 11, 2009, 08:16:21 pm

Seeing as how I'm just a "cap kit" guy (ie: can discharge a tube, understand the basics of the major parts of a monitor, can identify and replace visually damaged parts and install a capkit -- but not do much more, can't diagnose beyond visually eying burnt up parts  ;D) ... what are the odds I can fix a 7 year old crt TV?

The picture is very green. Skin tones are pinky salmon. No amount of adjusting the TV settings gets it anywhere near a good picture anymore. And there are faint 1" horizontal bars, mostly visible in dark areas of the image. Oh and when it's really cold, the tv makes snapping noises (cold solder joint along some high voltage part?)

I imagine a TV this "young" probably uses those tiny shrunken parts and there's no hope to fix this myself...

This is it: http://www.amazon.com/JVC-AV-27D304-27-TV-Silver/dp/tech-data/B00008VEK4/ref=de_a_smtd

Title: Re: Odds I could fix my TV?
Post by: qrz on February 12, 2009, 07:57:55 pm

possibly a weak crt /circuitry issues.

print here :
http://www.eserviceinfo.com/downloadsm/12161/JVC_AV27D104,%20AV27D304%20AV27430,%20AV27432.html

check c527  10uF /250v
the processing ic has an automatic kine bias (akb) circuit to compensate for gun aging.
typically what occurs is the crt drops below the min level the akb can tolerate.

(sometimes turning up the screen grid for a few seconds,
then back to original position will " jolt " the akb setting  ) 

qrz

Title: Re: Odds I could fix my TV?
Post by: RayB on February 13, 2009, 02:43:16 pm

Thanks!

Title: Re: Odds I could fix my TV?
Post by: Ummon on February 13, 2009, 09:37:10 pm

Post what worked an all.