Can an aging miscellaneous DVD laser head be repaired?

Repair of the technical requirements are very high, it is recommended that brothers do not reluctantly, after all, has been "aging miscellaneous laser head"! Nowadays, branded DVD drives don't cost a lot of money! Change it! If the brotherhood of friendship test, you can refer to the following SONY CDU311 laser head as an example of the repair approach to try. 1, disassemble the laser head assembly. SONY CDU311 laser head assembly on one side of the set in a garden column-shaped metal sliding rod, the other side of the stepper motor drive mechanism connected to the SONY CDU311 CD-ROM drive laser head assembly fixed point in the CD-ROM drive in the upper part of the only unscrewed a dowel, unplugging the soft row of wires can be up to take down the laser head assembly. Before unplugging the flexible cable, it is recommended to draw a straight line with a pen at the interface between the cable and the socket to make a good mark, so that it is easy to judge whether it is correctly back in place when restoring. Unplugging and inserting the soft cable, please do not disassemble the stack, light plucking and inserting, it is extremely difficult to repair after damage. 2, clean the laser head. Laser head (laser tube and photoelectric receiver tube) is installed in a small piece of circuit board, generally has eight lead wires, led by the soft line. Most of the laser head circuit board is mounted on the side of the laser head assembly. The laser emitted from the laser tube passes through a right-angle detachable optical path formed by a prism, is reflected by the focusing lens and the optical disk, and then returns from the original path and is received by the photoelectric receiver tube. Laser head circuit board is fixed on the optical head assembly, you can remove the circuit board can be cleaned laser tube and photoelectric receiver tube, but also from the circuit board corresponding to the hole into the cotton to wipe the prism in the hole. The optical head of the SONY CDU311 optical drive eliminates the reflective prism and emits and receives the laser beam directly through the focusing lens. It can be cleaned by a method that does not remove the circuit board. To clean the laser head of the SONY CDU311 Optical Drive, remove the black plastic dust cover that covers the focusing lens. Plastic dust cover on both sides of the two on the snap, through the metal casting on the two card holes stuck in the bottom of the optical head assembly and stick with adhesive, the bottom of the laser head upwards, with the tip of the tweezers will be on both sides of the dust cover to remove the glue on the snap, loosen the snap, and upward to pull out the dust cover. Draw out the dust cover can be seen just below the focusing lens has a garden hole, the lower part of the garden hole is facing the laser head, with a piece of fine copper wire made of L-shaped, wrapped in cotton, cotton carefully into the bottom of the hole to wipe the laser head optoelectronic devices. When wiping, pay attention not to laser scratches on the surface of the optoelectronic device, but also shall not touch and break the suspension of the focusing lens of the elastic wire, which not only plays the role of suspension and is the focusing coil of the lead wire, otherwise it will be focused on the coil circuit damage. It should be noted that most of the optical drive laser head sealed cavity, it is not easy to enter the dust, disassembly and cleaning is not convenient, careless operation may lead to optical drive scrap.