Question about Philips Televison & Video
We bought this tv off Craigslist for $50. The problem appeared to be convergence chip(s), and I figured it to be an easy job. I have an electronic engineering degree - I'm pretty confident around electronics. Anyway, the guy had the tv in the back of his truck fro who knows how long. It's been in the single digits here for days. He had the tv covered, but it didn;t matter. When we brought it into our house, it apparently started condensating pretty badly on the inside. Like an idiot, I turned the thing on about 10 minutes after we got it in the house. I heard some popping and crackling, but no burned electronics smell. I pulled the back of the TV off and used a fan to sirculate air in the tv cabinet for several hours. Once all condensate was gone, I powered the TV back up, and all we get is a red picture. If I adjust the 'screen' adjustment for the red CRT (inside the cabinet), it gets brighter and dimmer, but not as it should. It only flickers when I turn the knob - doesn't increase and decrease lineally. If I turn either the green or blue adjustment clockwise, the TV will work for about 45 seconds (the B and G CRT's will light up), then the picture shuts off. I know I have a bad convergence chip because the picture was bowing down from the top and up from the bottom last night when we looked at it at his house. From what I have read, the CRT's are not bad... but I need to find out what could be wrong (read: smoked) to determine whether I should look for another TV or fix this one.
Always check the power supply first. I'd go ahead and replace all 3 convergence ic's and then start at the voltage reg. in the power supply. get the part number of off the V reg. and go to
Click here: Electronic Components Supplier-Catalog-Cross Reference-NTE Electronics and you can cross that number and get the pin-out to find the V output. Check to see if you have about 130 volt on the output leg. it its a lot higher than 130v,or none at all, thats what I would replace.
See what's free at AOL.com. voltage reg. and go to
Posted on Dec 17, 2008
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Posted on Jan 02, 2017
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