In my Lexus LX450 I hooked up my Alpine 9883 head unit in the sound system. The position of the head unit is the problem for me. I hear whinney buzzing noises when the head unit is positioned at a certain angle. To loosen the head unit’s grip with the dash, I loosened the screws and then the whinney buzzing sound disappeared. However, after two hours the sound returned. I am thinking that it returned due to gravity repositioning the head unit. I wrapped the screws with electrical tape so the electrical conductivity would be insulated. I need your advice on how to fix this. Thank you.
I would check with the Alpine distributor who sold you this unit, and discuss your situation with them. They may have included relevant comments on mounting the head unit with the unit itself, but in any case, their Customer Service engineers should certainly be able to address this issue.
How to Identify and Fix Common car Problems ?
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A buzzing noise that goes up and down with engine RPM is usually caused by an issue with the alternator. It is either caused by it being shorted internally, it being loosely connected, or a bad ground connection to the engine. A loose ground will cause electrical interference which causes this noise.
The two main causes of a persistent humming or buzzing are: a bad audio cable connected to the amplifier, or. there is electrical noise being passed through an audio cable into the amplifier.
Vehicles with an engine and emission control system make that noise when the system is doing certain self checks. It`s normal.
The audible noise that can be heard from high-voltage cables occurs because of the energy that is discharged. This discharge occurs when the conductor surface`s electric field strength is greater than the breakdown strength of the air that is surrounding the conductor.
Circuit breaker.
If you trace your hum or buzz to your circuit breaker, immediately switch all circuits to off, and schedule a service call right away. When circuits get overloaded and can`t turn off, they make noise, and so do damaged and loose wires.
The most prevalent cause of vibration is problems with your wheels or tires. The potential problems include improper wheel and tire balance, uneven tire wear, separated tire tread, out of round tires, damaged wheels and even loose lug nuts.
If you ever hear growling or whining noises coming from under the hood, you could have alternator problems, which should be checked out by a professional ASAP. This growling or whining sound happens when the belt that turns the alternator`s pulley becomes misaligned or rubs against the side of the pulley.
Ground loops. The number-one cause of unusual audio noise and weird video is the ground loop, simply because it`s so darned easy to create. The most common manifestations are a loud buzz or hum coming through the speakers, or scrolling bands on a TV screen.
While the transmission is the most likely cause, whining while accelerating can also be caused by low power steering fluid or more serious damage like faulty alternator bearings, a malfunctioning water pump, a broken piston or a bad AC compressor.
Electrical noise is the result of more or less random electrical signals getting coupled into circuits where they are unwanted, i.e., where they disrupt information-carrying signals. Noise occurs on both power and signal circuits, but generally speaking, it becomes a problem when it gets on signal circuits.
I adhere to Martin´s answer, humming is symptom of short circuit or input voltage out of range. The capacitor is certainly electrolythic and should be swollen by now, be carefull as the stored energy (if still working) may make it to explode.
Buzzing sounds are especially common in grounded outlets, which protect the outlet and device from an electrical surge. But if you hear a louder buzzing sound right as you go to plug something in, that could be an issue. In this case, the buzzing sound is most likely a loose connection between the outlet and the plug.
Use thick, sturdy materials to put the transformer on to avoid excess vibrations like thicker metal, wood, or concrete pads. Apply flexible mounts or vibration dampeners to reduce movement and noise levels including the high pitched whining the equipment can make.
A humming noise while you accelerate could be a sign of a bad wheel bearing, uneven tires, or an alternator belt issue. Some of these problems can be dangerous, so it`s important to bring your car to a shop ASAP. Bizarre noises are never a good sign when driving.
Worn or dirty spark plugs can cause a petrol car`s engine to misfire in one or more cylinders, which can cause vibrations when the car is idling or at running speeds. The easiest solution is to replace your spark plugs and check the related wiring. Engine vibrations can also be due to the air and fuel systems.
Failing alternator bearings:
The alternator has several bearings which allow the alternator`s rotor to spin freely. If these bearings begin to fail, you will notice a loud whining noise, which will increase when you accelerate or the car is under heavier load.
A ground loop is a condition in an electrical system that contains multiple conductive paths for the flow of electrical current between two nodes. Multiple paths are usually associated with the ground or 0 V-potential point of the circuit.
A damaged fuel pump might make a loud, whining sound that you`ll hear from your gas tank. The pump may also make this noise if you`re low on fuel or the fuel in your tank is contaminated. The normal noise your pump makes is a low hum.
Possible causes include worn-out brake pads, faulty brake calipers, not enough or no lubrication on the brake parts or simply low-quality brake pads and/or brake rotors. Special tools are sometimes needed to locate the source of a noise, such as Electronic Ear Sensors.
Drive or motor failures, lights flickering, analog signal variations and poor encoder count repeatability are all symptoms of electrical noise issues.
You should hear static or a buzzing sound as you get close to the source of the interference. The closer you get, the more intense the static will be. If you cannot locate the interference source in your own house, check with your neighbors to see if they also experience interference. The source may be in their home.