my beomaster 5000 stopped working, i heard popping and it smoked.
I inspected it and saw that the MM5450 IC (Display) was blown. Now I've changed it but the beo 5000 doesn't turn on, the relays don't even click.
What can I check to understand the problem?
Thank you
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Beomaster 5000 stopped working
8 replies
It could be an overvoltage problem on one of the supply rails.
Check for a shorted regulator. Begin with the one supplying the MM5450.
If so, repairs could be intensive.
Martin
Thanks I'll start with these, I noticed that by inserting the headphones the mute relay activates and I hear a "hummm" noise.
Beomaster 500 repair update, I replaced two burnt power amps and all LM317.
By measuring the voltage as the manual says on module 4 (microcomputer) instead of 5 volts it shows me 35 volts and by acting on R15 it does not decrease.
Advice?
35V on a 5V rail is bad news.
This is one of those cases that will typically never be completely repaired, seeing as all circuits
running on 5V will be damaged.
Even after repairing and replacing everything that appears to be affected, some
components will still have scars that will show up as faults later.
My suggestion - find another Beomaster.
Martin
Thanks, I'll look into it but either way I want to try and fix it. The problem is that the wiring diagram found on the net does not match.
I will use used components that I own on old boards so as not to spend much. I'll keep you up-to-date.
Thank you
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