Hi! I’ve been investigating a Beomaster 6500 for a while which does not respond to remote control inputs. I’ve tried both a 5500 MCP and a Beolink 1000. The unit does power up if I press any of the buttons on the Beomaster 6500, but it still does not respond to remote control signals.
Funny enough it occasionally did respond to remote control every 5-10 power-up. But since I’ve changed the 4700uF capacitor (for 5V if I remember correctly) which measured ~6300uF, it never responds. On the occasion when it actually came to live from the remote it also could produce decent sound. So the Beomaster 6500 is pretty ok, but just won’t listen or speak. I’ve double checked that the 4700uF is mounted properly and all voltage levels seems decent.
I’ve changed the capacitors on the transmitter (and the few ones on the CPU board) and the IR diods flashes via the mobile camera. So I’m pretty sure the transmitter works. The receiver also seems to work. At least I see signals coming in on the R70 close to the CPU. But I wonder if there’s something fishy with it?
Sometimes I get a base square wave of ~100Hz and other times ~50Hz. If I press a button on the MCP I can see some sort of signal coming in and the frequency increases for a short period. The Vpp is around 5V so that also seems fine.
At the moment I’m a bit clueless of how to continue so any feedback is welcome!
/Martin
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