AD 7173A fails to burn DVD-R

It burns +'s alright, but for some reason power calibration fails during initialization, when I attempt to write on DVD-R.
any ideas please ?
the firmware version tested includes 1.0.3, and 1.0.4 with mods.

Post a logfile.
Obviously you should use quality media.

Hi and welcome to cdfreaks gryzman. :slight_smile:
Please use DVD Identifier to post more details about your discs/ media you’r using.
BTE, for new members this topic can come handy

Off topic.
@chef, please stop your “obviously” crap posting. You better take your time and socialize, help and guide our new members out next time… /off topic.