Sorry, but I disagree. But I find it best to let people learn what it is. Keep in mind that here in the states CDRW drives plummeted to under 20 bucks on sale and DVDRW drives are from 50 to 99 bucks. NO SPARE PARTS are available so when the drive is dead, you chuck it and get another.
I know you want to try so here's the writeup -> http://repairfaq.ece.drexel.edu/sam/cdfaq.htm
http://repairfaq.ece.drexel.edu/REPAIR/F_cdfaq2.html#CDFAQ_008 is a slight varient to look over.
My past experience tells me that with time Lens in CD ROMS or DVD/Music Systems fails to read certain CD's while they may read some Music CD's,but will fail to read DVD-R/CD-R or Mp3. When they are brand new they work excellent.somebody told me that after some time lens are to be balanced like our Rims and Tires.
Please can somebody guide me how do a CD lens work what's the life of CD Lens and how to clean or repair them?