After analysis, it should be the aging problem of the mouse wheel encoder. After purchasing a suitable encoder, the netizen sent the mouse to Xunwei for quick repair and tried to repair it. Microsoft Arc wireless mouse fixing screws are hidden under the front foot pad and label of the battery compartment. After heating the foot pad with a hair dryer, take it off at the lowest angle possible. The position where the product label is attached is arc-shaped and needs tools to uncover it.
After removing the front foot pad of the Microsoft Arc wireless mouse, the product label of the battery compartment is uncovered, and seven screws for fixing the upper cover of the mouse can be seen. For a wireless mouse, such a large number of fixing screws is very rare.
Microsoft Arc wireless mouse is fixed with two flat head cross screws under each foot pad. The battery is horizontally arranged with three fixing screws, the middle of which is a special hexagon socket head screw, which needs a special screwdriver to be removed. After all the screws are removed, the upper cover of the Microsoft Arc wireless mouse can be removed.
After removing the upper cover, you can see the whole interior of Microsoft Arc wireless mouse. To remove the mouse wheel encoder, we need to remove the upper circuit board of the mouse first. There are two red and black wires on the back of the upper circuit board of Microsoft Arc wireless mouse, which are directly welded to the electrode of the battery compartment, and the solder on the electrode can be removed by melting with an electric soldering iron.
The upper and lower circuit boards of Microsoft Arc wireless mouse are connected by flexible wires. Open the detachable cable socket button with tweezers, and then pull the cable up slightly with tweezers to remove it. There are no screws between the upper circuit board and the chassis of Microsoft Arc wireless mouse. After the power cord and cable are removed, you can remove the circuit board on it.
After removing the upper tail circuit board of Microsoft Arc wireless mouse, pull out the mouse wheel horizontally, and then start to replace the wheel encoder.
Microsoft Arc wireless mouse encoder is relatively small, and there are many components on the circuit board, so be careful when operating. The only advantage of my encoder is that you can heat three pins at the same time with a small pointed soldering iron. After all the solder on the solder joint is melted, the encoder can be easily removed. During operation, the temperature of the soldering iron is set at about 280℃, and care should be taken not to let the soldering iron touch other components as much as possible to avoid unnecessary damage.
Take out the new encoder box, carefully observe whether there are stains on the pins, wipe them clean if necessary, and scrape them off with a blade if necessary. If there is no problem, tin can be applied, and the melted solder can be carefully coated on the encoder pins with a soldering iron to ensure that the contact position between each pin and the solder joint is covered with solder, so as to avoid the problem of virtual welding during welding.
We found a problem when installing a new encoder on the circuit. Compared with the original encoder, the purchased replacement encoder lacks two fixed pins, which will not cause any problems for normal operation, but will bring us a little trouble in installation. Because there is no fixed foot, the encoder must be pointed at the quasi-solder joint with your fingers during installation, and then heated and fixed with a soldering iron.
After replacing the encoder, although the important maintenance part of the Microsoft Arc wireless mouse has basically come to an end, we still need to put the upper circuit board after replacing the encoder back on the mouse.
First, switch the power cord to the electrode of the mouse again with an electric soldering iron. Although Microsoft made a wire hole on the electrode with great care, we don't have to think so much, just weld the power cord firmly on the electrode.
In the whole installation process, the most troublesome thing is the installation of the upper circuit board cable. Because the buckle of the socket is loose, when the flat cable is inserted into the socket with tweezers, the buckle often falls off with the flat cable, resulting in the flat cable not being installed in place. Finally, we have to use two toothpicks to fix the buckle, and then we can insert the flat cable into the bottom smoothly. Because it is not convenient to take photos while working, there is no way to sort out the photos of the line in the end. After all the installation is completed, do not tighten the fixing screws in a hurry. Test whether there is anything wrong with the mouse first, so as not to have to disassemble it again in case there is something wrong with the mouse.
After confirming that there is no problem with the operation of the mouse buttons and the wheel, tighten the upper cover of the mouse, tighten the fixing screws, reheat the foot pad and label and stick them back to their original positions. The whole operation of replacing the wheel encoder can be said to be a complete success. Limited by the internal space of the mouse, Microsoft Arc wireless mouse has to use a subminiature patch encoder. Although it gives the mouse charming and beautiful lines, it also greatly shortens the service life of the mouse wheel. It is worth thinking twice whether performance is important or appearance is important.