How to correctly repair the six methods of the walkie-talkie

This article introduces you how to correctly repair the walkie-talkie. The walkie-talkie is different from other home appliances, and the maintenance methods are not the same. Especially when you are repairing the walkie-talkie without circuit diagram, you should grasp the correct maintenance method. The main points are as follows: :

Method one, look at the appearance, remove the mechanical damage method. When you get a faulty walkie-talkie, you should first investigate whether there is any appearance of damage, such as antenna breakage, damage to the display screen, cracking of the circuit board, damage to the chassis, damage to buttons, knobs, switches, etc. In practice, Often, after the mechanical damage is removed, the whole machine can be recovered normally.

Method 2: Look at the screen and identify the faulty part method. When you get a faulty walkie-talkie, you have to look at the display screen to judge the faulty part of the walkie-talkie. For example, if there is no indication on the button, the programming does not change, there is no appearance, etc. After these investigations, the location of the attack may be preliminarily determined.

Method 3: Look at the function operation. When you get a machine, after watching it, it is necessary to reset the operation according to the correct method. The fault similar to the lock machine and the crash is solved.

Method 4: Look at the current and discriminate between the receiving and transmitting circuits. Overhaul the walkie-talkie, if you use a 0-2A ammeter in the power supply circuit, after looking at the current size, you can determine whether the receiving and transmitting circuits are normal, turn on the power, and receive the current. The current is about 3-10mA. When the squelch is turned off, if the noise is normal at this moment, and the current is added to about 40 mA, it is basically determined that the reception is normal. Press the button, according to the power setting size, the current should be around 550mA. If the current indication is small, such as less than 100mA, make sure that the walkie-talkie launches some or the power amplifier does not work. It is better to use the various potentials to measure the potential, waveform and current changes of the key points, and it will be very helpful to detect the problem of the walkie-talkie and prevent detours.

Method 5: Look at the abnormal components of the circuit board and quickly determine the fault method. When flipping the intercom, first check the components on the board for damage, such as bursting components, burnt wires, solder joints, etc. After investigation of these components, they can quickly recover. Machine function.

Method six, make good use of external maintenance. Appearance is the right assistant of the repairer. If you can use the relevant appearance sensitively, it will bring a lot of assistance to your overhaul. In some cases, it is impossible to overhaul for certain problems and no appearance. This requires that each repairer must be longer than the use of various appearances when overhauling the walkie-talkie.

Through the above six points, we have learned about the maintenance method of the walkie-talkie, and hope to help each maintenance person save time in the process of the walkie-talkie maintenance.