Major RS8020 Receiver

[tuby64]

Hello,
a friend of mine has an old Major RS8020 Receiver that needs to be repaired.

I see it was repaired in 1986. More recently somebody tried to fix it, without having the right skill. :tears:
I see exploded plastic transistors and burned resistors into the power amp board.

I'm not able to find its schematic diagram on the net.
May be an AK friend can help me..:scratch2:

Thank you in advance!
Stefano

 

[tuby64]

No reply.
I'll be forced to tell my friend that he is the owner of a good doorstop..

Tuby

 

[ryuuoh]

Can you post pictures of the damaged areas?

 

[tuby64]

Hi ryuuoh,
This weekend I'll reopen the receiver and I'll take some shots of the power-amp board.

It was placed for years near a fireplace and then it was powered-on again.
That time my friend heard a "boom" from inside. :-(
Inside I see a film made of ashes everywere. It is so "glued" to the internal parts that I'm not able to remove it with the compressed air. This conductive dust can be the cause of the problem.

In case it was a McIntosh and it was mine, the solution should be a strong cleaning of all the parts (many hours of my time), before repairing it (so, other hours to spend). Considering it is a Major, I don't think it is worth the effort.