CD-ROM with sound when reading disk

When users use the optical drive to read the disc, sometimes the CD-ROM will have a "JoJo" sound. This is a situation many users will encounter, due to the optical drive's ability to read the disk or poor quality of the disc, the surface damage caused.

At this time, although the optical drive can check the CD and CD format, but in the reading data, the laser head will be in the action of the servo circuit as much as possible to read the data. If the laser head position has been too large upward movement, coupled with the quality of the disc is not good, the disc in the high-speed work is not a plane, the laser head to move up after the focus will touch the disc, "tweeted" the sound. Serious, will be due to the high speed of the CD-ROM drive, the phenomenon of frying disk, resulting in optical drive damage, can not continue to work.