Dvd Player Rev
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Magnavox MDV3000/F7 Up Conversion DVD player, Black $34.00 DVD Player with 1080P up conversion... |
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there is a high pitch whine coming from the head unit in sync with engine revs.?
Just put a dvd player in my car. it was running fine the first day, then i noticed a high pitch whine. the whine goes up in pitch and down in pitch with the engine revs. is this caused by a power surge or something? how can i eliminate this noise. i thought i could ignore it, but come on, its just unprofessional. any thoughts or ideas would help greatly.
i have an amp running four interior speakers and an amp running two subs. the dvd player has a seperate "brain"
this noise is only made when the engine is running. when the car is off, there is only beautiful sound. my buddies suggest it could the water pump or fuel pump noise getting picked up by the head unit. some say its through the antennae but i don't have one hooked up. what does anyone think about this?
Ok thanks I wish i could be of more help here...but. it is difficult without working on the car and figuring it out with you.(there are so many variables)but I never dealt with a noise problem i couldnt get rid of.
Is easier to check this out....tracking down ground loops ( page 2 of 2)
https://resources.myeporia.com/company_38/tech%20note%201002.pdf
1st of all you need to find out where the noise is entering the system....easiest way is to unplug your signal wires from amp and plug in a different source...Ipod, portable cd player...whatever.....rev engine and see if noise is still present with other audio source running into amp Yes? then usually a bad ground... NO noise?see #2
2nd take a pair of RCA and run them outside the car to your amp..to your head unit...Noise still there...NO? ( then noise is entering through your signal wires entering possibly due to being to close to power wires, ecu, cars electronics) must then reroute signal wires away from sources of noise .....IF yes see #3
3 the fun part....unplug antenna .......still noise? ...if so then the radio( or DVD brain ) must be shielded or the ground of radio must be transferred to better grounding source away from factory wiring. all grounds including battery to ground should be as close to equal in resistance...and not much more then .2 of an ohm....
( figured with a DVM (digital volt meter)
there is always a way to remove noise from a system...it is a painstakingly aggravating process but there is never a need for noise suppressors EVER