Modify your CD-ROM to watch DVD movies

arpit661

Recruit
There are two types of CD-ROM drives we can mod:
24x to 40x
40x or higher
Drives slower than 24x are too old to be modded.
24x to 40x CD ROMs
Laser Head Adjustments:
The track pitch of CDs is 1.6 microns, and the track pitch of DVDs is only 0.8 microns. The minimum length of track pits of CDs is 0.843mm, and the minimum length of track pits of DVDs is 0.293mm. That's why DVD discs can store much more data in the size of a CD.
Pinpointing this situation, we need to adjust the laser head so it can read discs with smaller track pitchs and shorter track pits. Open up the CD-ROM drive, do you see a lens on the rail? That's the laser head. On the side of the laser head, there's a screw you can adjust.
This is the key of this mod.
This screw can adjust the size of the laser beam that lands on the disc. Referring to the above, after adjusting, the laser beam should be less than 0.293mm, to suit the needs of DVD discs. So turn that screw 2-3 times. I got this number through trial and error. Mark with a pencil, in case you forget how many times you turned that screw.
Speed adjustments:
DVD-ROM drives can play DVD movies smoothly at 4x speed. If we're modding a 32x CD-ROM drive, the rotation speed is obviously too high, increasing heat, and shortening the life of the drive.
So we need to decrease the speed of it.
Most people know that power supplies can provide 5V (red wire) and 12V (yellow wire) electricity output for Molex connectors. Find the Molex connector you'll plug into the modded CD-ROM drive, cut the yellow wire or insulate it with tape, so only 5V of electricity is transferred to the CD-ROM drive. The speed of the drive is now 32 * 5/17 = 9.41x and can now fulfill our requirements.

40x or higher CD ROMs
When 40x CD-ROM drives are released, most manufacturers are already producing DVD-ROM drives. To lower cost, they use the same core as DVD-ROM drives with DVD functions disabled. What we need to do here is to re-enable the DVD function.
Open up the CD-ROM, behind the circuit board, look for a jumper that says DVD JUMP. Find a jumper to connect this jumper. Thin metal wire also works fine.
OK, so the DVD function is unlocked, but we still need to decrease the speed. Use the instructions above on how to decrase the speed of the drive.
Notes:
Modded drives cannot be detected in POST, that means you cannot use it in DOS. But once you get into Windows, the drive works fine.
Modded drives have no region code problems.
Modded drives MIGHT NOT read DVD9 discs, that's why I said you can watch most retail DVDs in the beginning
sorce tech world

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Still .. a first post and an attempt to hit the correct note..
i dont think this has been posted here either.

Appreciated ... keep it up Arpit and try to format ur post in a more presentable manner.
Also, an intro shd be made. :)
 
Ah! This is not up-to-date. I have modded my Old 16X Creative Infra to work with Blueray disks. Even Im playing PS3 disks on my PS1.
 
does this thing really work ?? i mean how is it possible..

cause i have a old 52X LG CD ROM ..does this mean it's capable of reading dvd discs ?
 
O my GOD! Mujhe nahi pata tha ek silly se post pe log itna serious ho jayenge. :rofl: Anyways. Somebody show me a video which shows the conversion of a CD-ROm into DVDROM then I will give you the link to PS1 transforming into PS3. :bleh:

Still interested in CD/DVD hacks? Here are some:-
1. Modify you DVDrom into DVDRW.
2. Modify you DVD drive's laser into metal cutting pointer.
You may add more to this list. Just a need of little wild imagination.... :)
 
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