XJ-HD 163 is the sams drive as LTD-163, it's just the new name since the Liteon DVD-rom section became Jlms. If your current firmware is very old the drive won't be accepted by the latest firmware flasing utility, just because they neglected to include it in the coding.
That is one reason I have GH5S-all
on my 163 page. It's a GH5S flash utility for flashing in windows where the pre-flash model checkup is disabled. It will agree to flash ANY drive on your system, meaning you have to be careful to flash the correct drive. Just pay attention when selecting the drive in the drop-down menu.
You can download it from my 163 page : http://digi.rpc1.org/163fw.htm
Please read the warning and the disclaimer first.