RCA g35302wk Picutre collapse

This is simple, you've got a cracked solder joint in the vertical output section, possibly a bad vertical output driver but usually it's just the soldering. Don't run it like that, it'll burn the phosphors in the tube. If you've got any electronics skills at all this should be a really easy fix. It's easier to do it when the problem is still intermittent as you can tap stuff with the set running to narrow it down.

I have not been running it this way. Currently I have a litte 20" sitting on top of that one so I can atleast watch the news. I thought it might be a cracked solder joint. But I wanted to see if there was any info on the internet first, thats where I came up on the replacement of the components listed above. But when I looked at the schematic and it listed one of those as an EEPROM I figured I would try to find the info somewhere else. I will check for the cracked solder joints and let the group know the outcome.

Thanks A Ton, Bill

The EEPROM is probably still fine. I forgot to mention, while you're in there you should resolder the tuner shield grounds if this is one of the sets affected by that. It'll prevent future issues.

Bill wrote in news: snipped-for-privacy@rhondasworld.com:

AKA "vertical collapse"

Possible indication of a thermal problem.

Certainly no expert here but I just fixed my RCA Home Theater (model #F31224GG made in 1993) with exactly the same problem you are experiencing. Turns out it was a bad solder joint for a resistor in the vertical section; one leg of the resistor had come completely free from the board's solder pad.

As the previous poster mentioned, try tapping the circuit board with an insulated none-metallic implement of destruction (grin).....in my case, the video began jumping more the closer I got to the defective joint. Also try moving the legs of the various components where they attach to their pads....usually the bad leg connection will move freely with little effort.

If after trying this method nothing is readily apparent, then you might have a cracked circuit board trace.....use previously mentioned implement of destruction to put pressure on the board itself to see if the trace will join itself back together. Giving the board an eyeball over with a magnifying glass is another method to try.

If none of the above works out, then it's time to start looking for failed components with various pieces of testing equipment and troubleshooting methods.....which for the most part I will leave up to more knowledgable participants in this newsgroup to share their wisdom with you.

Good luck.....hopefully you will be able to track down the source of the problem. :-)

Greetings Bill..

Regarding: "I am skilled in electronics and do have experience with HV systems, I just do not know where to being looking...."

I suspect that you meant BEGIN looking..

First and foremost, this has nothing to do with an EEPROM or a microprocessor.

Interesting.. One of the first things almost any school teaches (trade school, 2 year junior colleges or even the universities) is about video systems. In regards to electrical circuits and theory, it's a good place to learn about oscillators, amplifiers, deflection both vertical and horizontal, power supplies etc. Even though our video sets are changing, the theory behind the above circuits still applies..

As illustrated in many a fix-it-yourself softbound books still on the shelf regarding TV repair, this is a vertical oscillator/amplifier issue. Now days, both are usually in an integrated circuit with polarized electrolytic capacitors hanging off the IC. Since the IC tends to get rather hot in many installations, an initial inspection of the IC is a good idea. I've recently fixed a JVC with intermittent vertical deflection issues by merely sucking up the old solder (Soldapullt) and re-soldering it with a clean soldering job on all pins, then removing the residual flux with alcohol. The TV is still working years later now.

In addition, I've got a 25" stereo color TV that was given to me by someone at work with the same symptoms that you describe, bright horizontal line (in the middle of the CRT) with no vertical deflection - sound is A-OK. It seems that the previous families kids liked to push all the front panel buttons real quick - including the on/off button - unfortunately.. The first thing I did was call Thompson and order the schematics for the TV. Sure enough, the vertical oscillator/amplifier IC was shot. Once replaced, the video folded over at the top of the now full deflected video image. Why the folded over image, defective polarized electrolytic capacitors. As I seem to recall, there's usually a 33ufd capacitor (amongst a few others) that are highly suspect. How to determine for sure, an ESR (Equivalent Series Resistance) checker will determine in two shakes which electrolytics are bad. Since the electrolytics are relatively inexpensive, you can always shotgun with about 5 or 6 around the IC, but - obviously, measuring for the defective component(s) is always preferred. Once the IC and the capacitors were replaced, I've been enjoying that free stereo TV ever since. The picture is now beautiful and, prior to doing the 'fix,' I cleaned out the cabinet completely and got rid of the dust & spiders. They had put it in the garage on the floor..

Cheers, Mr. Mentor