It has all the information you will need to fix it. The main circuit diagram is only A4 but being a PDF, you can print it to any size - I did it on two sheets of A3 and it didnt lose any detail - just made it readable when pinned up above the bench. I've found the fault, just need to buy some obscure bits to get it going again!
I cant fault the process, I paid for the manual in the morning and it was ready to download by lunch time.
I am very grateful for this manual. Without it could not repair my receiver.
Text excerpt from page 1 (click to view)
SERVICE MANUAL
This service manual supplement contains only the difference from SC313B. For all other parts not included in this supplement, See original service manual for SC313B.