cyberguy

All remedial actions proved dead end. Ended up getting new amp (refurb). Noticed that on the OLD amp, to left of Brown Wires from Power Transformer, there were TWO smaller yellow disks (XS90) apparently terminating together. On the NEW amp, that is replaced by ONE yellow disk (XF185) in that location. Wondering if this is a known update of the unit and what are the details so perhaps I can apply it to my old amp and maybe fix it in the process. Thanks for any info!

Ditto xenophon above. Anyone with any helpful info?