Notes for Service Technicians: Warpage

Very occasionally, CDs/DVDs may not be completely flat, i.e. they may be warped or buckled. With such CDs/DVDs, electronic fault correction may no longer be able to compensate for the defect when the last track is played. When played, CDs/DVDs are read from inside to outside. Because warpage is at its greatest at the outer edge, there may be reduced reproduction quality at this point.