repaireneeded

Thank you for your time really 👍 One more question my amplyfier did not have tiristor 90 and big resistor R39 on it and all I see on web is with this... and I do not know why...

Hi, I need your help, how can I repair this does anybody have schematics what part comes to R26 and how is C80 connected. Here are the pictures... Or if anybody can repair it I am from Europe.