- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
The low humming sound is the motor that opens and closes the drawer. It is moving, but the movement is not being transferred to the door by a pulley, a belt or a gear, When you open the drawer completely, it should stop. When the drawer is closed completely it continues to run until the disc is in the proper position to play. As long as that motor is running the DVD will not work because the disc is not in the proper position,
Do you get audio from all channels(speakers)or are some not working? If some are working and some are not and the hum is only on some speakers and not on others then you most likely have a problem only in the audio amplifier section that supplies that speaker(s) if the hum is on all speakers and present with the volume all the way down it could be a power supply problem such as bad electrolytic capacitors.This may take some detective work to track down.
Hello Sir, Hi try to check the usual, like mute? or is the cable good? check the menu if the unit is on mute. or use another cable. you can check the unit by simply listening to the speakers soft HUM. this HUM should be present, the hum is most loudest at full volume (even if there's no music). A missing hum means two things, you have the speakers not connected or open (burnt). or you have problems with the unit. please check them both. let me know your progress.
You can go buy a audioquest SUB-X subwoofer cable with a additional ground wire on it an connect the ground cable to the ground slot of the receiver an the other end to a screw on the sub or into one of the high output terminals on the woofer if it has them an this will take that humming sound right away but the cable is around $90
jd40, Sounds like a grounding issue. The first two places to look into is the powered subwoofer and antenna. During your last test, did you leave the FM antenna and subwoofer connected? Many times the hum is directly related to the antenna and/or the subwoofer and to how they are grounded; creating a ground loop through the receivers ground on the outlet. If the antenna is grounded to the dwellings wiring, hum is inevitable and sometime you can get a ground loop hum from how or how & where the subwoofer is grounded. Try taking them completely out of the loop.
Also try taking it further back to the basics, start with the receiver plugged into a known good grounded outlet with no surge or line conditioner in the loop and nothing connected to the receiver, nothing. Use one speaker and different wire to test each speaker output while in tuner and any other mode but phono. With no signal, you will either get nothing (no hum or static) or just static in the tuner mode. No hum is a good sign. Some systems will mute the speakers if no signal is connected to eliminate the static from being produced through the speakers but a ground loop hum will most likely still be produced even in mute. If you get a hum when nothing is connected to the receiver, try looking into getting a better grounded outlet, even maybe to a different dwelling.
The humming is always there you just can hear it better when the cd is playing. The humming is caused by the electrical system in your car. There is an inline filter you can buy and insert it between the car's power source and the head unit. I had a head unit I bought that was absolutly terrible until I installed that filter.
Also if you did a do it yourself job on your amp wiring it is usually best practice to run your RCA cables on the opposite side of the car as your power cable.
You can also purchase shielded spark plug wires which is a source of noise usually of a different kind tho.
First make sure you have a good ground. This means that you have grounded your amp to bare metal not painted metal.
If that didn't work put in the inline filter on the head deck as they are only $20 available at radioshack.
If that doesn't work, go back an wire your car right this time and put the power and RCA on opposite sides of the car.
If you still have that hum it may be the spark plug wires but that sounds more like static than hum.
You have a text book case of alternator hum...