slop101
11-11-07, 04:26 PM
I found the problem/symptom for my TV and the cure for it. The only thing is that it's very tech-talk, and I can't make much sense of it. Any help would be appreciated.
Symptom:
Unit has a dark raster and will shutdown if the screen is increased. It will also shut down if the majority of the picture field exceeds 85 IRE video.
Cure:
This set has a ABL problem. Monitoring the ABL voltage at the flyback T551(3) we found it to be -0.9 volts no mater how bright the picture was. Check the resistance to ground we found it to be less than 5 ohms. This should be around 1.1 meg. Problem was caused by a shorted C524 a 0.22mfd@100vdc. Replacing corrected the problem.
guh?
Symptom:
Unit has a dark raster and will shutdown if the screen is increased. It will also shut down if the majority of the picture field exceeds 85 IRE video.
Cure:
This set has a ABL problem. Monitoring the ABL voltage at the flyback T551(3) we found it to be -0.9 volts no mater how bright the picture was. Check the resistance to ground we found it to be less than 5 ohms. This should be around 1.1 meg. Problem was caused by a shorted C524 a 0.22mfd@100vdc. Replacing corrected the problem.
guh?


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