Hi
I have a Beomaster 6500 on the table with a quite strange problem.
It came in with defective uP. After replacing it, performing a reset - and replacing the standard electrolytes capacitors around, it was working, no problems. Unit returned to the owner.
After some days, I got it back again. Left output amplifier transistors and emitter resistors, burned, also the processor was dead. I replaced the transistors, emitter resistors and the 100R bias trimmers - and the processor. Unit working again - but.... will not accept input from the remote (IR).
I can use the front switches, turn it on, mute, step etc. - but that's it. Reset not possible.
Any suggestions?
I would very much like to receive a BIN file with the EPROM software, then I will burn a new to see if this helps.
I can't understand why the uP died, and i can't understand why this is (or is not??) related to the output transistors dead. It could be just a bad BIAS trimmer - and if the processor died first, the safety circuit was not able to shut the unit down - and then the transistors dies.
Kind regards, Peter
