Pioneer A 209 R --> defekter Trafo

Hi,

Your amplifier has a power-transformer with an internal thermal fuse.
When people connect too many speakers or even defective speakers and play LOUD for some time the fuse can open because of the transformer heating up.
Lightning may also kill the fuse.
Unfortunately they also become defective just because... No reason, just bad quality of the fuse/transformer itself.

The fuse is integrated into the transformer and can't be replaced. HOWEVER, some times it's possible to get to the leads of the fuse and simply bypass it. NOT a very good idea because the transformer is no longer protected from overheating, besides it's (in my country) illegal to bypass fuses in electronic equipment.
So, it's upon you if you want to do it. I have NEVER heard of it causing problems and many people did it. The price of a new transformer is crazy and the fuse-trick is the only practical way of getting the amplifier up and running.
Don't worry, it's not the only fuse in the amplifier, you'll still be protected with other fuses in case of severe faults in the amplifier.
On page 9 of the service manual you will see the schematic of the transformer and the internal fuse.
PM me with your e-mail address if you want the manual.

Good luck,

Kind regards,

/tri-comp

Bist du dir auch absolut sicher, dass es der Transformator ist? An der Primärwicklung liegt also wirklich Netzspannung an?