Re: debug bang and olufsen beomaster 3300 amp model: 2953



ok thank you I will start with these.
I just ordered a capacitor tester, I guess you need to pull each one to test properly (?, or use an ESR meter... probably beyond my ability at this point TBH)

I've only every known a capacitor was bad by looking at it....

Re: debug bang and olufsen beomaster 3300 amp model: 2953

I swapped out the resistor... no dice
I guess the amp chip next?

here is a picture of the back before replacing the resistor
...

Re: debug bang and olufsen beomaster 3300 amp model: 2953

@eccerr0r,
it sounds like I should replace the STK IC, as well as the blown resistor.

@petehall347, is it a hybrid (I just looked this up)... it does not have tubes if that is what hybrid amp means...?

thank you!
here are some more pictures


...

Re: debug bang and olufsen beomaster 3300 amp model: 2953

@eccerr0r
I'm not great at reading/understanding the schematics TBH
here is the full document if that can help.

[URL="https://beomanuals.com/manuals/Beomaster/Beomaster%203300/Bang-Olufsen-Beomaster_3300-Service-Manual.pdf"]https://beomanuals.com/manuals/Beomaster/Beomaster%203300/Bang-Olufsen-Beomaster_3300-Service-Manual.pdf[/URL]Re: debug bang and olufsen beomaster 3300 amp model: 2953

@eccerr0r
I'm not great at reading/understanding the schematics TBH
here

greetings from Westport CT.

I have recently purchased a circa 1986 beosystem 3300.
it worked gloriously for a few hours. then no sound and smell of burnt electronics from the beomaster 3300 amp model: 2953
attached is a bit of the schematic, I have the full pdf schematic if needed.

all, functions aside from sound output seem to still work on the unit. (cd/tape/phono change, display volume display, remote control, radio station, on off etc.

I'm pretty sure the smell was from resistor edit[r122] burning up. (see picture)
I will replace the...

Re: New Members - please post your introductions here

Hi. I have recently decided to get into some vintange Bang and olufsen gear.
Beosystem 3300, and 6500.

I will need some hive mind help determining what electrical components need to be replaced to bring it back to function....