Question about Zenith Televison & Video
I have a 50 inch plasma that I replaced the controller board on (the CATV input was broken). I replaced the board with a new one, but now the picture is only about 20 inches diagonal in the middle of the screen. I'm assuming I can connect serially to the board to make the needed change to the picture size, but was hoping some one could tell me the proper procedure. Any help is greatly appreciated!
You should be able to zoom, and stretch the picture with the remote control. Since you replaced the main board you lost the settings that were in memory. Simply re do them once more.
Posted on Jan 06, 2014
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Posted on Jan 02, 2017
SOURCE: Panasonic TV 50 inch plasma
I had the same problem and found that I was viewing the TV input instead of the composite input. Once I changed it back, the aspect setting would hold.
Posted on Feb 10, 2008
I have a Phillips 50 inch Plasma. About two months out of warranty the top half of the screen would go black. Sometimes when we tapped on the back behind the upper right hand corner the picture would return. I did some research online and found that there is a Main Y sustain board (much like a mother board in a computer) and connected to that board is a upper Y Buffer board and a Lower Y buffer board. According to my research these boards seem to be the source of the problem. I am assuming that the upper buffer controls the top half of my screen and the lower controls the bottom. I removed the back of my TV (about 50 small screws) and searched for these parts by part number. Surprisingly all of the parts in my Phillips are made by Samsung. I found the parts on ebay at shopjimmy.com. I decided to try replacing the upper Y buffer first. I ordered it from shopjimmy for about 100.00. When I received the part I started to remove my upper Y buffer and realized that the new part was slightly different. The part number was the same but the REV. number was slightly different. The new part was missing a small white connector that connects the upper buffer to the lower buffer. I sent it back for an exchange for the right part with no problem. Ok so here is the interesting piece of this little adventure. When I started to remove my upper Y buffer I removed the screws and started to pull on it to loosen it. When I noticed that I had the wrong part I pushed it back into place and put the screws back . My TV has worked perfectly since I did that, with my original part. It has only been about two months, but if you are in the same situation it might be worth a try.
Posted on Oct 24, 2008
Don't replace anything, Vizio has issued a lifetime warranty for this set because of this problem. No joke, call the customer service line and tell them you got the pop of death. They'll send someone out to 'repair' the set free of charge. If they can't fix it they'll give you a new one. Even if your mfg purchase warranty has expired. Call them and post the results. I've been fixing TV's longer than I care to admit and this is the first time I've actually seen a company stand behind their products like this. I bought a broken tv with the intent of fixing it and after replacing almost every board I could only manage to get the vertical racing stripe line, except mine was purple. I put it all back together and called to find out if there was a recall on this set and within 5 minutes the (Actual English speaking) gentleman told me to sit tight and he'd have a repairman come and do his thing. He did, and long story short, he couldn't fix it. Last week they delivered a new TV to replace this one. I was shocked. I think Vizio will have all my future business.
Posted on Mar 23, 2009
The problem lies in the X-Drive boards or the TCPs (tape carrier packages) and they are not serviceable. Once faulty the X-Drive boards must be replaced. The worst scenario is a bad TCP because it indicates a bad panel and you have to replace the panel.The X-Drive boards deliver color information to the vertical grids of the panel through the TCPs. That's why when a fault occurs in the TCPs, vertical black bars appear on the screen and an a much larger part when an X-Board fails. Your TV uses three of these boards, one each driving the right, center and left portion of the plasma panel. The left X-Board has eight TCPs and seven to each of the right and center X-Boards. In your case, the vertical grids driven by the center X-Board is dead but you can't tell the board has failed, It is due to the fact that both the right and left boards are okay but only two TCPs are good on each of them. Meaning there are six bad TCPs on the left board and five on the right. Remember a bad TCP indicates a bad panel and you have at least eleven bad TCPs. The only solution here is buy a new panel or probably a salvaged one auctioned on ebay or have your set or its parts auctioned on ebay then buy a new plasma TV.
Posted on Dec 04, 2009
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