Elkatone Amp with problems

Greetings people.
I have Elkatone Elka 305 amplifier that needs some overhaul.
Looks like this:
1669626672390.png


Has anyone schematic for this model?
Also, it doesn't have a pedal. So I will have to build my own, which is not the problem at all if I have the schamtic...
Please help if you can.

Cheers,
Jonhhy