Question about Televison & Video
burn out as well because of the short in these ic's. Be sure to be extrremely careful unsoldering and soldering and use good heat sink compound and fasten securely to the heatsink metal. Manual convergence calibration may be necessary after the ic's are replaced. First try Touch Focus after the ic's have been Properly replaced. This repair should be done by competent personnel and takes about 3 hours because of dis-assembly and re-assembly time. I am writing this because i have seen on this site mis-leading info. i come to these sites myself to verify part numbers and to see if there have been additional complications such as complete shut-down.
Convergence amp brings all the colors together. It could very well be that. Makes sense. Have him explain it to you and have him change it out.
To converge is to bring something all together. You colors are not all together.
The problem is bad eproms on the digital convergence board. They lose their memory and convergence goes out. You can enter the service menu and manually adjust all three colors back into linearity but chances are it will go out again. It can take upwards of 4-8 hours to manually adjust. Per Toshiba the digital convergence board part number 23706371 (PB6340B) is no longer available, although if you contact Toshiba they may direct you to the part somewhere else? Good luck.
You may have a convergence problem. Here are some of the most common symptoms.
Using your original remote go-to the tv settings then goto the convergence section.
Try to adjust the red and then the blue convergence.
You should be able to move them up, down, left, and right.
If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.
What has normally happened is that the convergence output driver ic's either one or both of them has shorted. Causing your picture to be un-converged, The Symptom of your failure can take on many different looks, so one explanation of what the failure looks like will not be adequate. It will be basically one or more (red,Green,Blue) crt's are not aligned correctly, and colored shifted, and distorted picture of some kind will be seen. Auto focus will not fixit and may even make it worse. When these ic's short, they can cause one or more pico fuse to blow. Allot of people ignore this part of the repair and get themselves into trouble. Please listen to my warning, and make sure you check these fuses!
FOR A MORE DETAILED DESCRIPTION GO TO: http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-
Thanks for contacting Fixya
Posted on Jun 20, 2009
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Posted on Jan 02, 2017
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