Like the mobile phone, the walkie-talkie is generally not waterproof, and the internal wiring is precise. If the water is improperly handled, the whole walkie-talkie may be scrapped. How to properly handle the walkie-talkie in the water? Small questions are asked by the university. Ou Yibao teaches you a few urgent treatment methods:
1 First open the walkie-talkie and disassemble all the external parts one by one (such as buttons, PTT glue, light guide column, etc.), carefully clean the circuit board with absolute alcohol or special wash water, dry it, and clean it with small tools. Stains on the board;
2 then soaked in anhydrous alcohol, conditionally cleaned with an ultrasonic cleaner;
3 After the fish is removed, blow it off with a hair dryer (note that the temperature should not be too high), and check whether the circuit board is injured. If there is a broken wire, use a thin enameled wire to connect, and use the three-meter to measure the resistance of the positive and negative terminals of the power supply. , can not be short circuited or open circuit (power, view current, normal is about 40MA, not less than 1000MA when launching);
4 Check if the wireless port is dirty, clean it if it is dirty, and if there are other faults, follow the normal maintenance.
5 test machine. After the components of the walkie-talkie are processed, they can be replaced in the reverse order. After the inspection is correct, the test machine can be powered on. It is best to connect the ammeter when the test is powered. If the battery case is not convenient to connect the ammeter, it is recommended to use the DC jack of the fuselage to insert 6~9V DC. Turn on the power for a short time, observe that the current should not be greater than 60mA, otherwise there will be short circuit or leakage in the machine, which needs to be processed. After the current is normal, you can observe whether the frequency display and the emission indicator are normal. Then use a co-frequency, intact walkie-talkie to receive and send a test machine. If it is normal, look at the operating current at the time of transmission. Normally, the key TK208 is no more than 1500mA, Nisse N888 is not more than 1000mA, and the HX260 is not more than 1100mA (measured at 72V). For a walkie-talkie with a short talk distance, check the antenna and antenna plug for looseness and oxidation.
When the power is turned on, the current is normal. However, if CL appears or the frequency is incorrect, it cannot be received or sent, which means that the frequency needs to be reset. For a walkie-talkie that uses a lithium battery to "memorize", such as the HX260, you must first check the voltage and current of the lithium battery. The voltage of the lithium battery is measured to be 3V, and the short-circuit current is more than 100mA.
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