ah ok . . . . much more clear now! you said:
"my config is 68040 taking from 1st oscillator 80 mhz and (broken) PPC taking from 50 mhz 2nd oscillator"
Oscillator 1 can't be 80 Mhz (oscillator 1 is the first on the right top)! and 50 Mhz for PPC?
Sorry i can't help :-( too much responsability if something goes wrong.
EDIT- if you want real help, post a picture to avoid misunderstandings.