Good afternoon
I am the owner of two F1 812 bose in about 1 year.
One of the speakers on the first use was defective in its power supply after about 12 hours of use, and it stopped while playing PC music at a very low volume.
I even opened the speaker and found a defective 22n60 right on the primary input circuit of the power supply, which burned the fuse.
Changed the defective 22n60 the speaker went back to normal operation, having operated after that for several hours without any problem.
But in the last weekend the same speaker again gave problems. When I started the alignment, I turned on the speaker, and after that I adjusted the volume and after about 10 seconds the power protection was activated.
I opened the speaker again and besides the same 22n60 it had damaged the first time, also damaged another two 22n60 also from the primary of the power supply. Then we replaced the three defective components with others and the speaker went back to work.
But now after about 1 minute operating the sound starts to fail, but coming back soon, in case I turn it off and then on again the sound will be stable again and after 1 minute it will fail again.
The power supply circuit has no heating signal, there is also no visible signal. The system on both occasions was turned on in a power manager.
Someone could help in solving this problem
Att