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Common walkie-talkie fault judgment and troubleshooting
Publish：2024-09-09 View：61
In recent years, the walkie-talkie in the domestic industry use rate is increasing, public security, armed police, forests and other professional users, construction sites, property, security, civilian amateurs, the use of more and more widely. Here are some of the most common faults in the daily use of the authors more than a decade of maintenance experience and the correct use of some simple introduction for walkie-talkie users to refer to.
I. Antenna: the antenna is the most critical parts of the machine transceiver, once the antenna failure or bad, will affect the transceiver communication effect. Users often use the antenna to drive the whole walkie-talkie, or worse, falsely shake the walkie-talkie at the tail of the antenna. As the antenna port is the entrance and exit of the machines high-frequency receiving and transmitting, often using professional TNC, BNC, SMA and other interfaces, at this time, due to the mechanical strength of the antenna itself, over time the antenna skin off, the antenna needle breaks, or the contact surface of the antenna needle becomes smaller, and in serious cases, the connection between the antenna needle and the circuit board will produce desoldering. At this time, the machine launch standing wave has become large, in the case of continuous work, some poor protection measures will produce power tubes, amplifier module burnout or power resistor burnout and other faults, the user will not be able to receive the words of the case will be sent to repair. It is recommended to pay attention to the correct use of the usual use of the method, often check the antenna, antenna seat connection between the reliable, whether the black dirt, antenna appearance is broken, if damaged, it is recommended to replace the same type of antenna, antenna seat.
Battery: The battery is the energy supply for the whole machine. Battery: Battery is the source of energy supply for the whole machine. As the walkie-talkie transmitter current is large, disposable alkaline batteries used less. Most of the walkie-talkies are rechargeable nickel-cadmium, nickel-metal hydride, or lithium-ion batteries. Often the user will propose the battery use time is not long enough, just after charging (PTT) did not press a few times on the powerless, in addition to individual operators using low-quality battery cells, affecting the normal use of the correct use of the battery is able to prolong the use of time and the service life of the battery. Investigation and questioning the user found that some users will be used in the charger to be placed in a random period of time, pick up and use, there is no regular charging and discharging. Due to the charging and discharging of nickel-cadmium batteries have memory characteristics, it will produce the phenomenon of not full. There are also some not long with the user will be a long time the machine with the battery on the charging seat for a long time. To know the current market many simple charger is not full of tips and protection circuitry, so a long time will form the battery overcharge, serious battery on the scrap. Users of lithium-ion batteries are generally equipped with a professional lithium charger, but it is recommended that users use up each charging cycle before charging. Although lithium has no memory characteristics, but after two to three hundred charge and discharge cycle capacity will be greatly reduced.
In addition, there are some machines due to the use of different environments, or battery quality problems, resulting in leakage, the machine and battery contacts will produce oxidation, corrosion. Resulting in poor contact between the battery and the machine, and in severe cases do not turn on the machine. This phenomenon can generally be seen from the surface, the light can be used to scrape the blade clean and then use, serious corrosion of the battery is recommended to be scrapped, the machine to repair.
PTT (transmitter button): transmitter button is in daily use, the highest frequency of use of components, in some of the machines sent for repair found that a part of the machine is the transmitter key outside the rubber aging or broken, affecting the normal use. Some affect the circuit board on the keys, buttons, poor contact, key failure and other faults, the best repair with the original machine with the same type of device.
Four. Power switch, static potentiometer, step potentiometer: intercom in the power switch is generally integrated with the volume potentiometer, a part of the low-end machine device quality problems, can switch the power, but the volume adjustment problems. It is recommended to replace the good with the same type of device. Static potentiometer repeated adjustments less chance, but need to work in a particular position, some users are afraid of the trouble of adjusting, simply glue dead, so that the maintenance of the future laid a hidden danger. Step potentiometer is used to convert the channel and manual programming when used, a good potentiometer feel very good, turn the step between clear, do not have a sense of smoothness. Some machines will be damaged when falling potentiometer shaft, so that it can not change the channel and programming, sent for repair can only be replaced with new parts. Currently some machines use a key switch, such models should be noted that the use of a long time, the conductivity change. Sometimes caused by the non-opening, or repeatedly press a few times to boot, overhaul should be considered first to clean the keyboard and circuit board.
V. Conductive keyboard: most of the walkie-talkie with DTMF keyboard and programming keys, send the machine for repair if the keyboard is found to be damaged, oil, individual keys off, rats, cockroaches bite. Such failures only need to be cleaned or replaced with a new one.
Six. Speaker (speaker): Speaker is a key component of the intercom receiver, some users like to open the volume to the maximum, some machines audio amplifier and la bar match is not well designed will burn la bar. There are also some special environment users, with a period of time la bar sound is getting smaller and smaller, overhaul found la bar sound film sucked a lot of iron powder, the iron powder will be completely removed clean generally can be restored to its original state.
Seven. Audio components (headset): Some users will use headphones and other external accessories due to work, audio plugs generally rely on special plugs and sockets to connect, over time will produce poor socket contact or desoldering, because the socket is generally with a dynamic break contact, which will produce a poor reception failure. Inspection and maintenance is recommended to replace the good socket.
Eight. Clip (back clip): Clip is a necessary accessory to the intercom, factory are equipped with a special fixed dowel. When the user will have screws in the use of the phenomenon of falling off, some users will find a screw screw regardless of the length, there are self-tapping screws. There are some machines after the chassis back clip screw holes are through-hole type, the screws are too long will damage the circuit board, serious machine will be scrapped. Walkie talkie back clip is generally labeled with screw size, such as: M3X5mm screw diameter of 3 mm, length of 5 mm, must be required to use the back clip screws.
Most of the above is the appearance of the walkie-talkie and mechanical failure. Mechanical failures most often occur in the machine fall failure, general fall failure will sometimes produce not open, or can open the machine can transmit but not receive, or receive the phenomenon of distance to close, etc., overhaul the appearance of the machine to observe, LCD (Liquid Crystal Display) is damaged, LCD damage is generally replaced with the same type of LCD can be. After the fall caused by the non-boot (boot generally have a beep) generally check whether the power supply is normal, the CPU crystal feet whether there is voltage, there is voltage with an oscilloscope to detect whether the vibration, if not vibration, generally this crystal is damaged, replace the crystal. Similarly, if it is a drop caused by the reception failure, please focus on checking the IF two-bench oscillator crystals and receive some of the relevant channel filters. Incidentally, here I mention the water or rain caused by the fault, the user encountered such problems, must be the first time to turn off the machine, remove the battery, with a dry cloth to apply dry water, with a hairdryer to blow dry, in serious cases should be timely to ask a professional to dismantle the machine to deal with, dont worry about it. Because the circuit board in contact with water caused by the failure of the repair rate is low, the scrapping rate is high.
I. Antenna: the antenna is the most critical parts of the machine transceiver, once the antenna failure or bad, will affect the transceiver communication effect. Users often use the antenna to drive the whole walkie-talkie, or worse, falsely shake the walkie-talkie at the tail of the antenna. As the antenna port is the entrance and exit of the machines high-frequency receiving and transmitting, often using professional TNC, BNC, SMA and other interfaces, at this time, due to the mechanical strength of the antenna itself, over time the antenna skin off, the antenna needle breaks, or the contact surface of the antenna needle becomes smaller, and in serious cases, the connection between the antenna needle and the circuit board will produce desoldering. At this time, the machine launch standing wave has become large, in the case of continuous work, some poor protection measures will produce power tubes, amplifier module burnout or power resistor burnout and other faults, the user will not be able to receive the words of the case will be sent to repair. It is recommended to pay attention to the correct use of the usual use of the method, often check the antenna, antenna seat connection between the reliable, whether the black dirt, antenna appearance is broken, if damaged, it is recommended to replace the same type of antenna, antenna seat.
Battery: The battery is the energy supply for the whole machine. Battery: Battery is the source of energy supply for the whole machine. As the walkie-talkie transmitter current is large, disposable alkaline batteries used less. Most of the walkie-talkies are rechargeable nickel-cadmium, nickel-metal hydride, or lithium-ion batteries. Often the user will propose the battery use time is not long enough, just after charging (PTT) did not press a few times on the powerless, in addition to individual operators using low-quality battery cells, affecting the normal use of the correct use of the battery is able to prolong the use of time and the service life of the battery. Investigation and questioning the user found that some users will be used in the charger to be placed in a random period of time, pick up and use, there is no regular charging and discharging. Due to the charging and discharging of nickel-cadmium batteries have memory characteristics, it will produce the phenomenon of not full. There are also some not long with the user will be a long time the machine with the battery on the charging seat for a long time. To know the current market many simple charger is not full of tips and protection circuitry, so a long time will form the battery overcharge, serious battery on the scrap. Users of lithium-ion batteries are generally equipped with a professional lithium charger, but it is recommended that users use up each charging cycle before charging. Although lithium has no memory characteristics, but after two to three hundred charge and discharge cycle capacity will be greatly reduced.
In addition, there are some machines due to the use of different environments, or battery quality problems, resulting in leakage, the machine and battery contacts will produce oxidation, corrosion. Resulting in poor contact between the battery and the machine, and in severe cases do not turn on the machine. This phenomenon can generally be seen from the surface, the light can be used to scrape the blade clean and then use, serious corrosion of the battery is recommended to be scrapped, the machine to repair.
PTT (transmitter button): transmitter button is in daily use, the highest frequency of use of components, in some of the machines sent for repair found that a part of the machine is the transmitter key outside the rubber aging or broken, affecting the normal use. Some affect the circuit board on the keys, buttons, poor contact, key failure and other faults, the best repair with the original machine with the same type of device.
Four. Power switch, static potentiometer, step potentiometer: intercom in the power switch is generally integrated with the volume potentiometer, a part of the low-end machine device quality problems, can switch the power, but the volume adjustment problems. It is recommended to replace the good with the same type of device. Static potentiometer repeated adjustments less chance, but need to work in a particular position, some users are afraid of the trouble of adjusting, simply glue dead, so that the maintenance of the future laid a hidden danger. Step potentiometer is used to convert the channel and manual programming when used, a good potentiometer feel very good, turn the step between clear, do not have a sense of smoothness. Some machines will be damaged when falling potentiometer shaft, so that it can not change the channel and programming, sent for repair can only be replaced with new parts. Currently some machines use a key switch, such models should be noted that the use of a long time, the conductivity change. Sometimes caused by the non-opening, or repeatedly press a few times to boot, overhaul should be considered first to clean the keyboard and circuit board.
V. Conductive keyboard: most of the walkie-talkie with DTMF keyboard and programming keys, send the machine for repair if the keyboard is found to be damaged, oil, individual keys off, rats, cockroaches bite. Such failures only need to be cleaned or replaced with a new one.
Six. Speaker (speaker): Speaker is a key component of the intercom receiver, some users like to open the volume to the maximum, some machines audio amplifier and la bar match is not well designed will burn la bar. There are also some special environment users, with a period of time la bar sound is getting smaller and smaller, overhaul found la bar sound film sucked a lot of iron powder, the iron powder will be completely removed clean generally can be restored to its original state.
Seven. Audio components (headset): Some users will use headphones and other external accessories due to work, audio plugs generally rely on special plugs and sockets to connect, over time will produce poor socket contact or desoldering, because the socket is generally with a dynamic break contact, which will produce a poor reception failure. Inspection and maintenance is recommended to replace the good socket.
Eight. Clip (back clip): Clip is a necessary accessory to the intercom, factory are equipped with a special fixed dowel. When the user will have screws in the use of the phenomenon of falling off, some users will find a screw screw regardless of the length, there are self-tapping screws. There are some machines after the chassis back clip screw holes are through-hole type, the screws are too long will damage the circuit board, serious machine will be scrapped. Walkie talkie back clip is generally labeled with screw size, such as: M3X5mm screw diameter of 3 mm, length of 5 mm, must be required to use the back clip screws.
Most of the above is the appearance of the walkie-talkie and mechanical failure. Mechanical failures most often occur in the machine fall failure, general fall failure will sometimes produce not open, or can open the machine can transmit but not receive, or receive the phenomenon of distance to close, etc., overhaul the appearance of the machine to observe, LCD (Liquid Crystal Display) is damaged, LCD damage is generally replaced with the same type of LCD can be. After the fall caused by the non-boot (boot generally have a beep) generally check whether the power supply is normal, the CPU crystal feet whether there is voltage, there is voltage with an oscilloscope to detect whether the vibration, if not vibration, generally this crystal is damaged, replace the crystal. Similarly, if it is a drop caused by the reception failure, please focus on checking the IF two-bench oscillator crystals and receive some of the relevant channel filters. Incidentally, here I mention the water or rain caused by the fault, the user encountered such problems, must be the first time to turn off the machine, remove the battery, with a dry cloth to apply dry water, with a hairdryer to blow dry, in serious cases should be timely to ask a professional to dismantle the machine to deal with, dont worry about it. Because the circuit board in contact with water caused by the failure of the repair rate is low, the scrapping rate is high.
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