The new techs there at CA need to read and relay the updated manuals they never re-published. All caps in those amps not only require replacement, the transformers are now starting fail. If there are hexfred diodes (upgrade) inside the amp, check and replace all too if they are 10+yrs old. I had a bank of them go bad in my former V12R only after a few years. A few colleagues have been having to replace their transformers in V12/Rs, melted, particularly the big transformer. Also, if anyone has been messing with the bias and driving it up too high, you cannot trust the LEDs on each bank / per side, use a multi-meter.
The original V12/R manual shows up to 280ma per side. Working with one of the prior designers there we concluded 280 was way too much, 230 was tops and 200ma per side still sounded great and helped to save output tubes. There later versions had 4amp fuses, and others higher at 5. Proceed with caution on that. A competent tech can repair it, finding one willing to do it can be a challenge in some areas, so some people end up sending it back to Cary. Best of luck.
The original V12/R manual shows up to 280ma per side. Working with one of the prior designers there we concluded 280 was way too much, 230 was tops and 200ma per side still sounded great and helped to save output tubes. There later versions had 4amp fuses, and others higher at 5. Proceed with caution on that. A competent tech can repair it, finding one willing to do it can be a challenge in some areas, so some people end up sending it back to Cary. Best of luck.