Sorry for the late reply. I dont have the sch for this amp, but we shoudl be able to sort you out.
The guys/girls here are a happy (mostly) & helpful bunch.
1. what is the problem ?
2. does the amp have send / return jacks, if so, check this out The Dreaded Switching Jack Problem
3. pictures always help, companies often use the same circuit in many amplifiers, so there may be something "close", include pictures of inside where the electronics are.
4. Is it a valve amp or transistor amp
5. check any fuses, there may also be some inside.
6. try with a different speaker
some carlsbo schematics carlsbro 50top, 60tc, 100top, bassline 50, bassline 80, colt120 sch