Great find! And Predictas are great TVs. I finished restoring mine a few months ago and, contrary to what many would say, I thought it was relatively easy to work on. Although not the same model, I followed the advice on this site (
http://antiqueradio.org/philc12.htm) and removed the circuit board to replace the caps and out of tolerance resistors. If you're careful (i.e., take good notes and treat the circuit board with care), it's straightforward and fairly painless.
Oh and one other thing: don't forget that your TV was likely mothballed for a reason. For my Predicta, after I recapped it and put it back together again, I found the vertical linearity control to be open after I powered it up. A quick substitution and I was up and watching Twilight Zone episodes.
Best of luck!
Dave