I bought a not working Sansui AU-5500 amplifier, I recapped it and replaced a fried 2SA808 output transistor with a 2SA808A because I couldn't find an 808? The only difference is the voltage, the 2SA808 is 80v the ''A'' is 100v. I also replaced the VR trimmers with 25 turn sealed types for the DC-Offset and Bias but when I measured across the fuse holders as per the Service Manual with a 72W DBT connected I found it was reading 33.5v across each fuse? (I'm trying to get 25mv) I tried to adjust it down but no such luck. The DBT doesn't show a short anywhere? Any ideas where I should look for this Gremlin?