激光头的维修（Maintenance of laser head）.doc

激光头的维修（Maintenance of laser head） Maintenance of laser head (1) CD laser is a precision optical electromechanical integrated device that USES laser beam to convert pit point signals into electrical signals. The CD player is very popular Using two types of laser heads: a holographic laser head, represented by a philips laser head; The second is the SONY laser CD laser is a precision optical electromechanical integrated device that USES laser beam to convert pit point signals into electrical signals. The CD player is very popular Using two types of laser heads: a holographic laser head, represented by a philips laser head; The second is represented by the SONY laser Ordinary three-beam laser head. Based on the practice experience, this paper introduces the maintenance and substitution method of CD laser head, and hopes to make some changes to the readers Help. Note: this article also applies to the computer optical drive laser head maintenance. 1. Maintenance of CD laser head 1. Common failures of CD laser heads are shown in the following table: CD laser head common failure Philips series of laser head typical failure performance Typical fault performance of SONY series laser Mirror smudges; Mirror grinding flowers; The objective component sinks; Laser tube aging; The surface of the laser tube is dirty; Internal prism smudge; Focus, Trace coil deformation, open circuit, short circuit or virtual welding. Begin to play very well, a few minutes later error correction, until the dead machine; Part of the disc can play, but most cannot play. The reading disc is very slow and lasts long; Individual disc cannot play, error correction, Mosaic serious. The gear is dislocated and worn; Foreign body card dead; The line breaks. The disc does not rotate, but the bald head has the focusing action, and the light tube is emitted by the laser. The spindle motor flies, but not the disc. Oxidation of plug and contact The disc is stopped several times, the light tube is laser emitting, a