[What should I do if the radio is noisy] What should I do if the radio is noisy
Why the radio is noisy
If you take out the rustling tape from the recorder and replace it with a better original soundtrack, and the noise disappears when you play it again, it means that the problem is with the tape. At present, there are many kinds of tapes on the market, some of which are of poor quality. In addition to poor sound quality, it will also have a serious impact on the magnetic head and reduce the service life of the magnetic head. So you should try to buy good quality tapes.
If the tape recorder is playing, no matter how you change the tape, there is still a rustling sound, this is the problem of the tape recorder. There may be three reasons for this:
First, the magnetic head is dirty, with magnetic powder or dust on it.
These things prevent the heads from sticking to the tape, causing gap losses between recording and playback, reducing treble and producing rustling. In this case, the surface of the magnetic head, capstan and pinch roller can be cleaned with magnetic head cleaning agent.
Secondly, there is residual magnetism on the magnetic head.
The recording and playback heads of the recorder work in the AC state. Due to the long-term effect, there will be residual magnetism on the magnetic head. The reason for the residual magnetism may be that the magnetic powder on the tape is magnetic and the magnetic head is magnetized; it may also be that the magnetic head is magnetized after touching the magnetic head with a magnetic screwdriver and other tools during decoration. When recording and playing with a magnetic head with remanence, rustling noise will occur. This requires cleaning treatment.
The third possibility is head wear.
Excessive wear and tear may result. At this time, the tape will grind obvious pits on the cylindrical surface near the gap of the magnetic head, and there will be obvious treble drop or noise during recording and playback. In this way, the new head should be replaced in time.
The tape recorderWhat to do with the cassette
When the tape recorder has a tape phenomenon, someone loosens the screws on the tape case, sometimes it is true lingering, but only temporarily, as cassettes are usually not caused by tightness but looseness. A loose tape can rub against the cassette, making the recorder difficult to operate. If you loosen the screw, the tape just gets looser and doesn’t fix the problem at all. The correct solution is: insert two pens into the two holes of the cassette, pull the tape taut, and then use the thumb and forefinger of both hands to slowly squeeze both sides of the cassette to flatten the tape on the two reels. Once you’ve tightened it and flattened it out, the tape will run fine.
The tape recorderHow to use it?
1. When using it for the first time, be sure to check the type and voltage of the power supply of the tape recorder, whether it is consistent with the power supply voltage during use. The AC motor must pay attention to distinguish whether it is 11} volts or 22} volts, and the DC dry batteries or batteries should pay attention to the A, B batteries and the positive and negative electrodes. To prevent burnout or failure of the parts.
2. The radio should be placed in a cool, dry place, avoiding direct sunlight or close to the stove. Don’t listen for too long each time. After 2 — 3 hours of use, it should be turned off for 3 minutes before listening. If you find that the casing of the cassette recorder is overheated or emits a special odor during use, you should turn it off immediately and wait a few times. On: The valve and parts are best wiped with a soft cloth to remove dust and keep them clean. But be careful, never place the recorder in a place that is easily exposed to wind and rain or in a dark and humid place. If the room is damp, you can use a desiccant or a cloth bag containing quicklime to put it in the recorder, and change it every few days to absorb moisture. Hot dehumidification.
3. Pay attention to lightning protection: If you need to connect the antenna, you should pay more attention to lightning protection during thunderstorms in summer. When there is a second rain and heavy thunder, you should shut down and disable it, and connect the sky and ground cables, otherwise the sky The current will be introduced into the recorder from the antenna, which will not only easily damage the parts, but even endanger personal safety.
4. When using the tape recorder, the switch should be timely, pay attention to within 5 minutes, do not turn it on and turn it off immediately, so that it is easy to burn out the light bulb or other parts: at the same time, the sound is not easy to open too loudly. sound to prevent damage to the horn.
5. If the recorder is not commonly used, the battery should be taken out in time to prevent the battery from being damaged and the parts from rotting. When using the power supply, unplug the power plug after each use, and release all buttons to the “0” position. If it is stated in the manual that you should refuel the mechanical rotating parts of the tape recorder regularly, you should strictly follow the instructions, and be careful not to let the lubricating oil contact the rubber parts to avoid deterioration and aging. The commutator and brush of the motor should be kept clean. After using for a period of time, use cotton dipped in a little industrial alcohol to clean it. The places where the tape passes, such as the magnetic head, capstan, pinch pulley, stop rod, fixed rod, guide wheel, etc., should also be cleaned with denatured alcohol frequently.
