I found this elsewhere on this site. Q10 and Q10B are IRF6215. Q11 is IRF3315. I don't know if this is what you are looking for and if it is you can probably get cross referenced transistors at any good electronics store if you don't want to obtain direct replacements. Just make sure you ask for what the pin outs are. Most output transistors have the same physical orientation but it is best to compare the replacement to the original when installing them. I couldn't find a source for the schematic or a service manual. If you know someone in the repair industry you might be able to get a copy. Sorry this is the best help I can give you and I don't expect payment for this.
Answers & Comments
I found this elsewhere on this site. Q10 and Q10B are IRF6215. Q11 is IRF3315. I don't know if this is what you are looking for and if it is you can probably get cross referenced transistors at any good electronics store if you don't want to obtain direct replacements. Just make sure you ask for what the pin outs are. Most output transistors have the same physical orientation but it is best to compare the replacement to the original when installing them. I couldn't find a source for the schematic or a service manual. If you know someone in the repair industry you might be able to get a copy. Sorry this is the best help I can give you and I don't expect payment for this.