Question about RCA F27648 27" TV
Reds missing from picture, replaced by black. I have tried switching cables, fiddling with the tint & warmth. most things that have red mixed with other colors look yellow, green, or blue, but reds don't show up at all. It worked fine a few weeks ago.
It sounds to be a video output stage circuit fault. Check all the solder terminals at its CRT base card, including the solder terminals of the CRT base to the card. Re-solder all the suspected solder terminals by applying a little more fresh solder. Contact any service technician. Check the solder terminals of Red color output transisotor. If needy, replace it with a new one with same number printed on it. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. Surf the site with patience.
http://electronicshelponline.blogspot.com/ Pull up older posts there.
The fault is 'one colour predominant/absent screen'
Posted on Mar 26, 2014
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Posted on Jan 02, 2017
SOURCE: Problem with picture color
The set is probably magnetized and needs degaussing (demagnetizing).
All CRT type TV's have an internal demagnetizing circuit that is engaged when the set is first turned on after being off for the day.
If this circuit is working then you sometimes hear a "bonk" sound (about 1/2 a second long when the set is first turned on. If this circuit isn't working the set will become magnetized over time and will have to be degaussed using a degauss coil available at a TV repair shop (cost aprox. $35.00) and you should have the circuit checked at the same time. A set will also become magnetized if a large speaker (magnet) or motor is close to the TV. Be sure to vote/rate me if this helped Thanks!
Posted on Oct 26, 2009
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