Panasonic tx-29gf10x image not filling screen
Hi there, I have the same model, and I had a simular problem , except my picture shrunk from each side of the screen into concave arc, if you know what I mean. I thought it might be a faulty horozontal output transistor, so I replaced that but did not fix it.
Eventually the picture quality dropped namely it became out of focus and i couldnt refocus it. Then it stopped all together and I heard a ticking sound, which I found was
coming from the line output transformer. A Tech friend told me it was probably a cracked or burnt out HV Capacitor, so checked them all and ofcourse they were all o.k.
So I have come to the conclusion that the Line Output Transformer is faulty, I hope I
am right as they are not cheap.
I think I have the answer to your problem which is a very simple one:
Adjust the "vertical picture height," and it will bring the picture down and fill the bottom of the screen. To do this adjust the VERTICAL CENTER SWITCH by pushing it forward towards the tube , this switch is on Board
TNP 107985 which is located right next to the AV inputs on the back of the TV, the switch is a round white component with a lever on it, and is located on the top of the board, push it to the max forward position, this should help, but might not fix it enough
depending on how much space u have at the bottom. There are no other vertical height adjustments on this Model so it would have to be a faulty component, like a HV
capacitor or burnt out resistor, or not enough HT drive voltage, which suggests dare I
say it--- Line output Transformer, could be wrong though.
Anyway good luck with your problem, hope what I suggested helps.