Just replaced the original drive in my Lite-On 5006 recorder with a new Sony DRU-120C from NewEgg (~$45, including shipping).
I was surprised to find that the original drive in my Lite-On 5006 had a Sony logo (model DDW-813S). It had lost its ability to read various DVD media and had begun to "write fail" and create "invalid discs" a whole lot. I tried cleaning the lens of the original drive, but that did not improve performance.
So I did some research, found out the Sony DRU-120C was a rebadged Lite-On SHM-165P6S, and decided to take a chance on it as a replacement.
Details of my research and experience with this drive are discussed in my previous thread, mainly starting with post #19.
I followed closely the simple installation procedures outlined by TunedPort350 in this thread, which includes some helpful photos. The minor modifications I made with the Sony DRU-120C were essentially the same ones TunedPort350 made for the Lite-On 160P6S replacement drive for his 5005 recorder. I'm guessing the two drives are basically identical on the exterior, and mine now also fits very snugly into my 5006 recorder, using his install procedures.
I am using the MYR5 firmware that came with the DRU-120C from NewEgg, although there is apparently a recent firmware update - version MYS6. However, the official Sony USA website does not yet list any firmware update for this drive. And since my 5006 is once again performing very well, I am reluctant to update the new burner's firmware.
I am very happy with the restored performance of my 5006 with this replacement burner. My previous irritating DVD recording problems have been completely solved with the new Sony DRU-120C burner installed.
I use my 5006 recorder only for recording DVDs, and as best I can tell, the machine is now back to perfect performance for that purpose.
I do not make VCD or SVCD recordings. And like most (if not all) the current replacement drive options discussed here, the Sony DRU-120C did not restore VCD or SVCD recording capabilities to my 5006 recorder, which is of no particular consequence to me.
My 5006 does still record audio CDs.
Unlike most Lite-On 5xxx recorders with replacement drives, however, my newly-rejuvenated 5006 recorder also still has full "fast forward" functionality, which may make this Sony DRU-120C burner the most desirable replacement burner available today.
I recommend that anyone interested in possibly using this burner as a replacement drive first read carefully my thread (first link in this post), in order to gain a better understanding of additional details including firmware updates for the Sony DRU-120C drive.
CCRomeo, please add the Sony DRU-120C (aka Sony DW-G120A) as another replacement drive option for Lite-On 5xxx (mine is a 5006) recorders.
Thanks to all who generously offered their assistance.