Author: Liu Huayu
Today, TV, VCD, DVD, amplifier, air conditioners are used in remote controls, and it is inevitable in use. Now, the resources are rich, buy a remote control LO yuan, but the original remote control is far more than the lanes, adopt components or production processes, so many enthusiasts are still willing to re-repair damaged remote control use.
To open the front and rear cover of the remote control, there will be several types of edge buckles, common. The thin edges of the upper cover have a concave edge, and the lower cover corresponds to a raised side. When you open this remote control, insert a slightly straight mouth blade into the seam, gently open a slit, and use the plastic pad or cardboard narrow strip, insert into the slit that has been opened and going forward. The thin edges of this side can be disengaged. It is not difficult to open the other side with the same way. There is a side buckle under the remote control box to make a small buckle film, very thin. Be careful when opening the remote control box of this structure. Now some remote control profile is stylish, such as arcuate, often made in its front end, with a side buckle, which can be opened. However, the rear end buckle of the remote control is not very good, and the arcuate of the remote control is buckled on the desktop while pushing the lower cover forward.
The author uses the abandoned pileborator housing, using the original components and printed boards, referring to the information on the magazine, has made a tester (see the accompanying drawings), which is when the signal sent from the remote control Down, while glowing indication. In addition, using the multimeter current barrier in the DC source of the remote control, the process of repairing and detection is simple, and the repair and detection of the remote control, the rendering rate is almost zero. Let's talk about this small instrument and talk about the repair of the remote control.
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(1) Since the remote control is easily impacted or damaged during use, the most likely damage is crystal, and the solder joints near it. The pin of the crystal is a tawy gold, which is not possible to fold. If the remote control is hit, the crystal excipient foot is easy to break, the solder joint of the foot will fall to the printed plate, resulting in the wire opening of this portion (similar faults also occurs on the solder joint of the transmit tube). At this time, it should be replaced with the same model. When the individual model is particularly difficult to distribute, you have to open the crystal enclosure at a very careless, and the pin is soldered and soldered and soldered. Many remote control of the remote control is welded upon wire board. When replacing the position permit on the circuit board, the crystal pickup is 90 °, and the horizontal welding is on the printed plate and melts between the crystal and the printed plate. The last high frequency wax or a small double-sided tape, which can greatly improve the seismic ability of the crystal.
(2) The reason for the failure of the emission tube is less, and it can be replaced with a good pipe with a detector.
(3) Some causes that the battery has been exhausted. Users will be replaced in time. Due to the low current consumption, the battery is relatively long-term without changing the battery.
The battery is rot, the corrosion liquid causes the battery clip spring rust, the power supply is not supplied, the remote control does not work.
2. Button reaction is not used
The detector first judges which button is invalid, usually a few keys with a higher usage rate.
The contacts of the keyboard on the keyboard with a sharp scorpion can be found that the extension between the printed lines is printed with carbon film, and in the long-term use of the easy toothline, thereby causing the road near the keyboard. Find a fault overline, plated with a tin in a multi-strand, gently shake the endpoint of the overline, add soldering to the endpoint to tin the endpoint with alcohol welding liquid, then weld the tinned wire. In addition to the crossed wire mat transparete rubber paper. Other wires don't have to take insulation.
3. Short remote control distance
Some remote control functions are functional, but the distance between control is clear, the detector and the controlled machine are reacted. Generally, infrared transmit tub is weakened; and some remote controls are due to the decline in driver tube in the pre-radiophage of the infrared emission tube, and the aggregate tuning is open. Replaceable component fixes.
4. When it is good, bad, the oscillator is frequent
When there is a good time and bad fault, the extraction of the microscope is carefully observed by the magnifying glass to carefully observe the fine cracks on the printed plate.
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