Daily malfunction analysis and solution of walkie talkie

The interphone is mainly composed of a shell, a host, a battery, a belt clip, and a seat charger. Widely used in *, civil aviation, transportation, water conservancy, railway, manufacturing, construction, service and other industries, for the liaison and command and dispatch among group members, in order to improve communication efficiency and improve the rapid response ability to handle emergencies. As the walkie-talkie enters the civilian market, people are increasingly using walkie-talkies to travel and shop. However, it often encounters a series of faults in its application. How to solve it correctly?

First, receiving problems (silent or whisper)

When there is no sound or low sound when receiving, please first check whether the battery voltage is sufficient. If the battery is normal, please check whether the receiving and sending frequency of the receiver and other transceivers are consistent with the sub-tone settings. In the above cases, please check in the following order:

1. Check the speaker is good or bad, if there is a problem, please replace it;

2. Check the horn's external socket. Replace it if there is a problem.

3. Check the encoder and potentiometer, if any problem please replace;

4. Check the contact between the soft circuit plug and the motherboard socket. If there is any problem, please re-install or replace the plug and socket.

5. Check the contact between the antenna and the antenna holder. If there is a problem, replace the antenna or antenna mount.

Second, the emission problem issues <br> <br> walkie-talkie-emitting portion is generally caused by the following reasons:

1. The battery is dead or the battery voltage is insufficient. Solution: Replace the battery or charge the battery.

2. The transmit button (PTT button) malfunctions. Solution: Replace the launch button;

3. The external microphone socket is in poor contact with the shrapnel, causing internal failure. Solution: Adjust the shrapnel or replace the microphone socket;

4. Poor contact between the soft circuit plug and the motherboard socket. Solution: Please re-install or replace the plug and socket;

5. The microphone head (microphone) is faulty. Solution: Replace the microphone.

Third, do not turn (the phenomenon of death) issue <br> <br> Replace the battery, turn on the power, the intercom does not boot. After confirming that the battery is charged and the battery contacts are in normal contact. First, check whether the fuse (f500) is burned out due to an instantaneously large current.

If the fuse is normal, generally no boot failure is caused by bad contact between the soft circuit plug and the main board socket, as long as the soft circuit plug or the main board socket is replaced.

Fourth, the boot has a walkie-talkie beeps <br> <br> advanced fault self-test function, often due to walkie-talkie boot found the following self-test failure beeps when the boot:

1. The frequency is wrong and the frequency range of the transceiver is beyond the frequency range of the transceiver. Solution: Rewrite the frequency;

2. Poor contact of the soft circuit. Solution: Replace the soft circuit plug or motherboard socket;

3.vco lost lock and related devices are bad. Solution: Replace the 12.8M crystal oscillator or TC1, TC2 and other related devices.

Cam Lock Nuts in furniture and cabinet industry: also known as eccentric connection matrix, is the most commonly used panel furniture and cabinet production connectors accessories, she and connecting rods, embedded parts into a combination of three-in-one connectors, also known as disassembly connectors, because it can disassemble and assemble furniture at any time and anywhere, this connector is very large Convenient transportation of furniture, door-to-door installation, but also vigorously promote the overall furniture and cabinet industry production.
Indicators: The most common is made of zinc alloy by die-casting, its common specifications are 15, is the general specifications of furniture panels, of course, some furniture drawers and other thin plates are used in 12, 10 specifications, and some large-scale public furniture, due to the thickness of the plate, the use of the important demand for height. Due to the lack of domestic furniture hardware standards, there is no general standard in the industry. In terms of the current furniture industry plate specifications, the size of 15 is the most common, the largest use.

Working Principle: As the eccentric wheel bottom deviates from the center of the circle radian, when rotating the eccentric wheel, the connecting rod in the radian will be slowly close to the center of the eccentric wheel bottom along the radian, thus tightening the distance between the two plates, so that the connection is fastened, "eccentric connector" hence the name.

Classification
A) according to its shape, it can be divided into two types: one is the cross slot eccentric wheel, the other is the cross plus six angle eccentric wheel. (Note: This kind of eccentric wheel can be installed with either cross screwdriver, one-word screwdriver or hexagonal wrench.)
B) according to the shape results, it can be divided into two types: one is an eccentric wheel with external teeth, the other is a toothless eccentric wheel. (Note: the characteristic of the eccentric wheel is that the three in one will be fastened after assembly and no retrogression will occur.
According to the shape of the internal clip can be divided into two kinds: one is a ball, with screw round head; the other is arc, with teeth, with screw square head.

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