i have a pf15tl plus, fried the amp

i have the definitive pf15tl plus. I took apart the sub and found a dozen or so resistors burnt, and the capacitors i believe were damaged also, does anyone have pictures of the amplifier so i can cross reference them and hopefully fix the sub.

I also was told that the speaker is supposed to have 75 ohms resistance but it only had 70. Is this speaker ruined or can i still use it?