Amazon.com description: Product Description: This guide presents information on servicing laser-based audio and video equipment. It focuses on compact disc players and Laserdisc video, but many of the procedures can be applied to CD Laserdisc, CD interactive, CD-ROM, and most other laser units. Lenk takes a general approach that aims to be reliable and practical, but which should be unaffected by changes in the products. Aimed at technicians, field engineers and skilled amateurs, this manual explains professional diagnostic and repair techniques, making liberal use of schematics, block diagrams and discussions of the theory behind laser operation. Circuit-by-circuit, component-by-component examples show how laser equipment works, how to pinpoint and fix malfunctions, how to perform routine maintenance, and how to install laser modules using current test and repair instruments.