brand new and high qualityDrive / Laser~Pickup SF-HD870 EP-HD870A Laser~ unit (optical pick up), Laser~ for head (Laser~ lense), Laser~ lens (laser~ unit)Important customer information:In day-to-day repairs, it is sometimes not easy to see whether the cause of the fault is to be found in the defective ~laser or elsewhere.Especially when the spare part has been renewed and the desired success does not occur.Therefore, please note the following points before installation:1. Remove any short-circuit that may be present.2. Avoid damage from your own electrostatic charge.3. In the event of problems, carry out a device adjustment according to the manufacturer's specifications.1. ~Laser for head installation knowledge1 How to judge the damage of the ~Laser head: The damage of the ~Laser for head generally shows that it does not read the disk or it is very difficult to read the disk.Discs with poorer quality cannot be read at all. When the device can recognize the machine normally, it is usually a shock.The problem of the bald for head, when the above situation occurs, you only need to disassemble the machine to check the model of the ~Laser for head, and then buy the corresponding modelPut the bald for head on, and the machine can be restored as new.2. How to judge the model of the ~Laser head: Generally, there is a model on the label of the ~Laser for head or on the base, such asIf not, please send us the picture taken by the bald for head, and we will have professional and technical personnel to confirm the model for you. PleaseConfirm the model of the ~Laser for head you need before buying to avoid accidental shooting.3. How to install the ~Laser head: When installing the ~Laser for head on the shelf, do not move the balance bar on the shelf. Being demolishedWhen removing the l~Laser for head, you only need to adjust the screws on one side of the balance bar, and do not adjust the other side, so as not to affect the leveling.Otherwise, the ~Laser for head may not read the disc. If you can'for t install it yourself, you can ask a professional to test the installation after purchase.Install, so as not to cause damage to the ~Laser for head and the machine.4How to open the solder joints When the ~Laser for head is shipped from the factory, in order to prevent static electricity from damaging the ~Lasertube, there are generally protective solder joints.(There is a larger solder joint on the bald circuit board or on the flexible cable) Short circuit the power supply pin of the ~Laser tube to the ground,Before installing the bald for head, it needs to be soldered with an anti-static soldering iron, and the electric soldering iron is heated to about 250 degrees Celsius-280 degrees CelsiusDisconnect the power supply, and then open the for protection point, otherwise the ~Laser for head will be unusable. Specifications:Use: ComputerModel number: SF-HD870 EP-HD870A Wireless communication: Wire Control note:Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes:1x Laser~ unit