Service bulletins are to replace 2 each 22 Ω/3.25 watt and 2 each 33Ω/3.25 watt. As well as rewire the convience AC plug. And replace the power supply pass transistors. I've done all three mods many many times.@avionic - did you see the service bulletins re. fusible changes ?
My first thought was to completely agree with your fusibles comments - but, there are a couple of service bulletins on the hifiengine site specifically making the changes (more or less) as Sajjad's made.