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Six ways to overhaul the radio

2019-03-08 13:52:01

This article introduces you how to properly maintain the walkie-talkie. The walkie-talkie is different from other home appliances, and the maintenance methods are different. Especially when the walkie-talkie without a circuit diagram is checked, the correct maintenance method should be grasped. There are six main points. :


How to properly overhaul the walkie-talkie 1. Look at the appearance and remove the mechanical damage method. When getting a faulty walkie-talkie, it is first necessary to investigate from the appearance whether there are broken signs, such as broken antennas, damaged display screens, cracked circuit boards, broken casings, damaged buttons, knobs, and switches. In practice, Often after cleaning mechanical damage, the whole machine can recover.


How to properly maintain the two-way radio. Second, look at the screen and identify the faulty part. When you get a faulty walkie-talkie, you need to look at the display screen to judge the faulty part of the walkie-talkie. For example, there is no instruction on the button, the programming appearance does not change, there is no appearance, etc. After these investigations, the location of the onset of the problem can be initially determined.


How to properly overhaul the walkie-talkie. Method III. Look at the functional operation. When you get a machine and watch it, it is necessary to follow the correct method to reset the operation. The failures similar to the lockup and crash are resolved.


How to properly maintain the two-way radio. Fourth, look at the current, determine the receiving and transmitting circuit problems. If the radio is overhauled, if a 0-2A ammeter is connected to the power circuit, you can judge whether the receiving and transmitting circuits are normal by looking at the current size. Turn on the power and the receiving status. 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 40mA, it can basically be determined that the reception is normal. Press the button according to the power setting size. The current should be about 550mA. If the current indication is small, such as less than 100mA, make sure that the radio is transmitting or the power amplifier is not working. Longer than using various appearances to measure the changes in potential, waveform and current of key points, it will be a good help to detect the faulty point of the walkie-talkie and prevent detours.


How to properly overhaul the walkie-talkie V. Look at the abnormal components of the circuit board and quickly determine the fault method. When you turn on the radio, you must first check whether there are externally damaged components on the circuit board, such as bursting components, burned wires, and solder joints. After investigation of these components, they can often be restored quickly. Machine function.


How to properly overhaul the walkie-talkie Six, make good use of the appearance of overhaul. Appearance is a good helper for the overhauler. If you can use the relevant appearance sensitively, it will greatly assist your overhaul. In some cases, it is impossible to repair certain problems without appearance. This requires that each overhauler must be longer than using various appearances when overhauling the radio.


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


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