[ajgriff]

Reidar, have a look at the bridge rectifier (D904). It's rectangular with four 'legs'. If it's showing signs of swelling or burning then it will be the source of the fuse problem although there could be other issues too. In particular, take a look at the two large capacitors (C901 and C902) to the left of the rectifier. If they are swelling at the ends or showing evidence of discharge they will need to be replaced. You can check these things without needing a meter or switching on the receiver.

Hope this helps.

Alan