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To adjust the height of the picture, you have to enter its service mode option, and should adjust the vertical amplitude data value, accordingly. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. http://electronicshelponline.blogspot.com/
The Height adjustment is off... look in the back of the TV set, it has some knobs in the back, one should be vert.lin for Vertical Linearity adjustment, and there is another call Vert.Hgt. for Vertical Height adjustment. try adjusting the Vertical Height first with someone watching in the front of the big TV to see if the top comes back into view, you might have to adjust the knob very slowly one way then the other way, to make this adjustment. If it doesnot adjust take it to a TV shop to get it repaired.
Vertical shrinking means lack of height we thinks. If there is a height problem for philips tv, surely some of the philips electrolytic capacitors should be replaced. Most of the electrolytic capacitors made by philips shows either a slight leak or lack in capacity after some years or days after use. When replacing them make sure to select other brands of same capacity and voltage ratings. If this doesn't help, get into the service mode of that tv and adjust "VH" and "VLI" functions, if you knows the service mode code. If you don't know it, please get assistance of a technician.
I had the same problem but was too cheap to replace the scaler board on a television which was not worth the cost. That board has 3 1000uf 10V aluminum electrolytic capacitors which had swelled tops and indications that they may have vented. Since they were installed using through-hole technology, they were easy to change with 1000uf 16V capacitors. (caps can not be more than 16mm tall). The set has worked fine for months. Cost of repair was 72 cents
On most TV units, there would be two (2) adjustments that affects your concern:
vertical Linearity (VLin); and
Vertical Height (VHt)
However, newer designs no longer have these adjustments since they are automatically done by the circuitry. If for some reason height is incorrect in such a system, then chances are that there is a leaky/defective capacitor in the vertical section.
Hope that this be of initial help/idea. Pls post back how things turned up or should you need additional information.
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