Hm , what do you mean ? If you have an external RGB2YUV - adapter, it should work fine, because this device converts the original RGB - output of the DB. So if the quallity of the YUV - signal isn't good enough, on my opinion the adapter/converter doesn't work as expected.
Indeed in my posting I was only talking about the modification of the DBs software ( config-file in /etc/enigma2 ).
That software-modification already brings you a YUV - Output at the SCART - connector (works quite fine at my beamer) , but the signal isn't 100% best qualitty, as the pins of the SCART connector are the same being used for RGB - Output, and the hardware is optimized for RGB. So without optimized hardware for YUV output there may be some color-shadows on the screen.
If you want 100% YUV quallity without using an external adapter/converter, at least you have to change the 3 capacitors ( including the loss of warranty for the DB) + additionally change the config-file.
And, last but not least, as you can read some postings above, sometimes there are differences in the capability of processing the YUV signal by the TV/beamer. So - depending on your TV/beamer - it might be better to use RGB instead of YUV. The best RGB2YUV-adapter/converter (or DB) doesn't make sense if the TV/beamer - hardware is too bad to process the signal, does it ?.