Question about Philips 42PF7320A 42 in. Plasma HDTV
My parents philips 42pf7320/37 plasma tv has a bad picture. my boyfriend and i recently acquired it in the hopes we could fix it. the screen has many lines going across and up and down it. the color also bleeds. light colors tend to bleed up and down the screen. lastly the hue is very red around these abnormalities. we have looked and the power board and what we believe is the video board for bad solder joints. we haven't found anything that looks "wrong" yet. i was hoping someone here might be able to speed up our hit and miss process and send us in the right direction of what we should be looking at. if anyone has pictures of what we are looking at with labels pointing towards the different boards and parts (or even pics with a REALLY good discription of where things are located and what they are) that would be extremely helpful and much appreciated. thanks
I am having the same problem with my TV. I believe that the Y-Buffer Driver IC's are bad. There are two small boards on the left hand side(looking at the TV from the back) with 6 small heat sinks on each of them. If you look closely at the boards, it ill say Y-BUFFER on them. There are ribbon cables that run from them to the Plasma screen.
In my TV, several sections of the screen do not have lines in them. These driver IC's are not hot, however the sections of the screen that have lines in, the drivers are hot to the touch. In order to verify that the chips are indeed bad, I am going to swap one that I think is bad with a good section and see if the problem moves. If this is the case, the boards can be swapped out, or chips replaced depending on what kind of parts I am able to find. The chip that they use is SN755867. I haven't been able to locate a source for the chips yet.
Posted on Jun 29, 2008
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