Common fault diagnosis of walkie-talkies
Common fault diagnosis of walkie-talkies shared by China Marine Radio Supplier.
In recent years, the utilization rate of walkie-talkies in various industries in China is increasing. Professional users such as public security, armed police and forest, construction sites, property, security guards and civilian amateurs are being used in an increasingly wide range. The following author more than ten years of experience in the maintenance of some daily use of the most common fault and the correct way to use some simple introduction for walkie-talkie users reference.
1. Antenna: antenna is the most critical component of the whole transceiver. Once the antenna fails or is defective, it will affect the transceiver communication effect. Users in the use of often antenna with your hands to drive the intercom, more serious is that artists in antenna tail shaking interphone. Due to the launch of the inward and outward mouth machine is high frequency receiving antennas, often use is professional, TNC, BNC, SMA interface at this time due to the mechanical strength of the antenna, antenna skin fall off over time, the antenna fracture, needle needle or antenna interface is smaller, serious when they make the antenna and the circuit connection between needle desoldering. At this time, the standing wave transmitted by the machine has become larger. Under the circumstance of continuous operation, some machines with poor protection measures will produce faults such as power tube, power amplifier module burning loss or power resistance burning out, and users will generally send them for repair under the condition that they cannot accept the word. The proposal usually USES when the attention grasps the correct use method, often checks the antenna, the antenna base connection is reliable, whether has the dirt, the antenna outward appearance is damaged, if has the damage, the proposal replaces the same model antenna, the antenna base.
2. Battery: battery is the source of power supply. Because the radio transmitter current is large, disposable alkaline batteries are less used. Most walkie-talkies are rechargeable nickel-cadmium, nickel-hydrogen, or lithium-ion batteries. Often can have a user to put forward battery use time is not long enough, just charge electricity (PTT) did not press a few times to have no electricity, in addition to individual operator to use inferior electric cell, affect outside normal use, correct use method is to be able to extend the use time of battery and service life. Investigation and inquiry of users found that some users will put in the charger when they want to use it for a period of time, pick up and use, no regular charge and discharge. Due to the memory characteristics of nickel-cadmium batteries, the phenomenon of insufficient charge will be generated. There are also some users who do not use the machine for a long time with the battery on the charging seat for a long time. We should know that many simple chargers on the market are not full of tips and protection circuit, so a long time will form a battery overcharge, serious battery will be scrapped. Lithium ion battery users are usually equipped with professional lithium charger, but it is recommended that users use up each charging cycle before recharging. Although lithium battery has no memory characteristics, its capacity will be greatly reduced after two to three hundred charging and discharging cycles.
In addition, there are some machines due to different operating environment, or battery quality problems, resulting in leakage, the machine and battery contacts will produce oxidation, corrosion. Lead to poor contact between the battery and the machine. This phenomenon can be generally seen from the surface, light can be used to scrape clean blade, serious corrosion of the recommended battery scrap, machine repair.
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