Need power supply diagram

Without the model number, there is little we can do to help. Also, many of these are not generally available. The good news is that many power supplies for VCRs are relatively simple to fix. Are there any symptoms at all or is the unit completely dead? Check the transistor that is attached to the heatsink for shorts. Normally that is the first item to get smoked when the power supply fails. Then check the 160V+ capacitors. There will likely be a 2.2ufd cap on the primary side that is defective. Change it and try again.

If the above does not resolve the problem, update this and we'll continue.

Dan