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 26 (click to view)
PT-56DLX75 / PT-61DLX75
REMOVAL OF THE BALLAST C.B.A.
1. Remove the Rear Cover and the Rear Shield Plate. Refer to Step 1~2 in "REMOVAL OF THE OPTICAL BLOCK UNIT FROM THE CABINET." 2. Remove the Lamp by loosening the Screw from the front of the cabinet. 3. 1) Disconnect Connectors B1, B2 then releasing the clampers. 2) Remove the 2 Screws (421), disconnect the Lamp Connector and release from the hook. 3) Remove the Ballast C.B.A. after releasing the 4 latch tabs.
