Modification to SF 1000 – 1 kW Solid State Amplifier
We have noticed a problem with an early failure of the fuse located on the Control Board of the 2 kW Power Supply module of our SF-1000. (SF3047 Board)
In order to avoid nuisance failures of this fuse, we recommend that you make the following simple modifications:
1) Soldier in parallel to R80 a 47nf, 50V ceramic capacitor.
2) Connect the lead closest to U15 of R86 to the side of C54 connected to ground in order to connect R86 to ground.