The most common problem is the power supply.. Due to the heat and poor fan design I'd recommend replacing the large Electrolytic caps..
Dielectric Absorption is basicly a cap drying out..
Dont be fooled, most will pass a basic cap checker test... Only an advanced cap checker will catch the true problem....!
Good Luck... pj
I have a tektronix 492 spectrum analyzer and I have a problem with the
> The analyzer seems to work ok but the video is compresed in a little square
> on the screen.
> I thing that is a problem in the deflection amps board or in the video
> procesor board, but I don't have the service manual or any kind of
> Anybody can help me??