报废的硬盘也能这样修复（Scrap hard drives can also be repaired）.doc

报废的硬盘也能这样修复（Scrap hard drives can also be repaired） Scrap hard drives can also be repaired Many people will be scrapped when they fail to find a hard disk or error in BIOS. In fact, if after the boot, the hard disk in the self-test can hear disk rotation sound, it is estimated that the main motor and control circuit board is no fault, there is still room for redemption. It should be noted that the hard disk is a delicate device, very fragile, before the repair, you should first wash your hands, release the remaining static electricity of the human body, and then operate. Unable to find the disk For HDD Not Detected error of the hard disk, first check the outside of the hard disk data signal line interface or distortion of solder joint interface exists. After removing the above possibility, remove the back cover of the hard disk and expose the circuit control panel. Unscrew the retaining screws on the control panel and separate the control panel from the hard disk body. You can see the two rows of spring pieces of the hard disk body. A row of power supply as main motor, another row as head of hard disk, mechanical arm, drive coil, power supply, and data transmission interface between hard disk main body and circuit control board. For no special package of hard disk, you can often see the spring and control circuit board corresponding parts are dust. With absorbent cotton dipped in anhydrous alcohol, clean the parts of the deformation of the spring sheet, and remove the oxide layer, under normal circumstances can be restored to normal. If the above process is not valid, then the main body of the drive must be turned on. Choose a few dust environment, unscrew the hard disk of the front cover screw (some with glue). Remove the front cover of the hard disk and see the disk clearly. First, the digital multimeter is used to detect whether the drive coil of the head arm is broken or not. The normal resistance of the coil is about 20 ohms. Next, check if the line on the head