Closed Thread
Results 1 to 13 of 13

Reload Thread: JVC KD-AVX77 Popping

  1. #1
    DesignoSLK's Avatar
    DesignoSLK is offline Junior Member



    Join Date
    Jun 2010
    Location
    Kaiserslautern, Germany
    Posts
    7
    Post Thanks / Like
    Mentioned
    0 Post(s)

    JVC KD-AVX77 Popping

    Hello All!

    I just installed a new JVC KD-AVX77 in a 2000 Mercedes SLK230. I retained the factory Bose amp and used a harness from Metra (70-1786) with RCAs built onto it. The only other wires I hooked up were Ign, Bat, Gnd, Ill & Amp turn-on.

    When I turn the uniy on and select sources, I get popping through the system. Also when I use the phone. I suspect it's a ground issue, but I'm using the ground that operated the OEM unit. I'm confused.

    Any help would be greatly appreciated!

    Thanks!

    Kevin







  2. #2
    DesignoSLK's Avatar
    DesignoSLK is offline Junior Member

    Threadstarter


    Join Date
    Jun 2010
    Location
    Kaiserslautern, Germany
    Posts
    7
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: JVC KD-AVX77 Popping

    Anybody?




  3. #3
    hatedonmostly's Avatar
    hatedonmostly is offline throwin' hunnits, hunnits



    Join Date
    Jun 2009
    Location
    Detroit, MI
    Age
    23
    Posts
    6,382
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: JVC KD-AVX77 Popping

    You are on the right track. When installing an aftermarket radio, you should never use the ground that is connected to the wiring harness.

    Fix your ground and let us know what your results are.





  4. #4
    DesignoSLK's Avatar
    DesignoSLK is offline Junior Member

    Threadstarter


    Join Date
    Jun 2010
    Location
    Kaiserslautern, Germany
    Posts
    7
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: JVC KD-AVX77 Popping

    Thanks Still. Before I posted this, I ran a seperate ground from the unit to the battery (-) and still got the popping.

    What I've read (And my experience as an electronic technician) tells me to keep the system grounds central to one another so there is no difference in potential. According to my ohm meter readings, the OEM harness ground and amp ground are the same and I would assume the RCA grounds are too as they get their grounding from the unit itself.

    Here's a thought though, the stereo ground is 20 gauge while the OEM harness ground is 22 gauge. And the jumper wire I used to go directly to the battery was also 22 gauge. Could that really be enough of a difference to create this popping?




  5. #5
    goingdef's Avatar
    goingdef is offline CarAudio.com Veteran



    Join Date
    Jan 2008
    Location
    Norfolk VA
    Age
    34
    Posts
    2,833
    Post Thanks / Like
    Mentioned
    11 Post(s)

    Re: JVC KD-AVX77 Popping

    I run the same head unit and never had that problem I would suspect it has something to do with the factory amp and the fact that the HU is a 5v pre out it's high enough to where I have my gains all the way down and that's still too far up. Does the factory amp have a gain setting?




  6. #6
    goingdef's Avatar
    goingdef is offline CarAudio.com Veteran



    Join Date
    Jan 2008
    Location
    Norfolk VA
    Age
    34
    Posts
    2,833
    Post Thanks / Like
    Mentioned
    11 Post(s)

    Re: JVC KD-AVX77 Popping

    Oh one other thing that has nothing to do with the problem, did you bother running the brake lead to the turn on lead so you would have all you options(dvd) without having to pull the parking brake?




  7. #7
    DesignoSLK's Avatar
    DesignoSLK is offline Junior Member

    Threadstarter


    Join Date
    Jun 2010
    Location
    Kaiserslautern, Germany
    Posts
    7
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: JVC KD-AVX77 Popping

    Quote Originally Posted by goingdef View Post
    I run the same head unit and never had that problem I would suspect it has something to do with the factory amp and the fact that the HU is a 5v pre out it's high enough to where I have my gains all the way down and that's still too far up. Does the factory amp have a gain setting?
    I don't believe the factory amp has a gain setting, but I wasn't looking for any when I had it opened (the amp resides under the pass. side floor board.) If that's the case, I may need to install a reostat of some sort to bring the gains down. I just hate adding more "stuff" to the system. That's why I went with this unit to begin with, to get rid of extra crap, i.e. Parrot Bluetooth and Zune cassette adaptor.

    Quote Originally Posted by goingdef View Post
    Oh one other thing that has nothing to do with the problem, did you bother running the brake lead to the turn on lead so you would have all you options(dvd) without having to pull the parking brake?
    Sorry, I replied before I saw your second post.

    Well, sort of, I connected it to the unit ground.




  8. #8
    Wingman0121's Avatar
    Wingman0121 is offline CarAudio.com Veteran



    Join Date
    Mar 2010
    Location
    Wisconsin Rapids, Wisconsin
    Posts
    2,549
    Post Thanks / Like
    Mentioned
    1 Post(s)

    Re: JVC KD-AVX77 Popping

    In my personal opinion it never works well when you use an aftermarket headunit with a factory amp, does it pop when you hook up speakers to the headunit's speaker outputs and the factory amp disconnected?



    Sold to: Mills561, Kross6622, sleazebagger, shpatb, esmokah
    Traded: Kross6622
    Bought from: DJ Nitrous 427, 97maxima

  9. #9
    goingdef's Avatar
    goingdef is offline CarAudio.com Veteran



    Join Date
    Jan 2008
    Location
    Norfolk VA
    Age
    34
    Posts
    2,833
    Post Thanks / Like
    Mentioned
    11 Post(s)

    Re: JVC KD-AVX77 Popping

    undo it from the ground as of now it thinks the brake is never being pulled it needs to see a + to think the brake is on as for the popping I would just pull the factory amp and drop in a nice 4ch, it is a 4ch right?




  10. #10
    DesignoSLK's Avatar
    DesignoSLK is offline Junior Member

    Threadstarter


    Join Date
    Jun 2010
    Location
    Kaiserslautern, Germany
    Posts
    7
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: JVC KD-AVX77 Popping

    Quote Originally Posted by Wingman0121 View Post
    In my personal opinion it never works well when you use an aftermarket headunit with a factory amp, does it pop when you hook up speakers to the headunit's speaker outputs and the factory amp disconnected?
    I didn't try hooking up speakers to the HU's powered outs. I could try that, but it will have to wait a couple of days, back to work today and tomorrow (12 hr shifts).

    Quote Originally Posted by goingdef View Post
    undo it from the ground as of now it thinks the brake is never being pulled it needs to see a + to think the brake is on as for the popping I would just pull the factory amp and drop in a nice 4ch, it is a 4ch right?
    So I should run it to a powered source, i.e. the Ign wire? Looking at the instructions/schematic that came with it, it appears it's looking for a ground. It works while I'm driving (listening to my Zune) but I get "No Signal" displayed. I figured that was because I don't have anything hooked up to video-in. That is a little annoying.

    As for a separate amp (Not sure if it's a 4 ch or not, I only have 2 fronts w/ tweeters and 2 subs behind the seats.), that would mean replacing the factory speakers/subs as well as they are 2 ohm. I'm happy with the factory Bose system. But I'll do that if there's no other way.




  11. #11
    goingdef's Avatar
    goingdef is offline CarAudio.com Veteran



    Join Date
    Jan 2008
    Location
    Norfolk VA
    Age
    34
    Posts
    2,833
    Post Thanks / Like
    Mentioned
    11 Post(s)

    Re: JVC KD-AVX77 Popping

    They will not tell you you have to read into the directions and yes to the ignition turn on lead so that it reads+ grounding it is like hooking it to nothing at all and right now it will not play dvds as for the rest of the system(speakers) you can keep those2ohms isn't a problem for most amps.




  12. #12
    krazykarl's Avatar
    krazykarl is offline Junior Member



    Join Date
    Feb 2009
    Location
    IL
    Posts
    26
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: JVC KD-AVX77 Popping

    Quote Originally Posted by goingdef View Post
    They will not tell you you have to read into the directions and yes to the ignition turn on lead so that it reads+ grounding it is like hooking it to nothing at all and right now it will not play dvds as for the rest of the system(speakers) you can keep those2ohms isn't a problem for most amps.
    Don't wire the brake lead to any positive source, that will fry shit, it needs to be run to a switched negative.



    Bought From: DUMPED, Mattd0344

  13. #13
    DesignoSLK's Avatar
    DesignoSLK is offline Junior Member

    Threadstarter


    Join Date
    Jun 2010
    Location
    Kaiserslautern, Germany
    Posts
    7
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: JVC KD-AVX77 Popping

    Quote Originally Posted by krazykarl View Post
    Don't wire the brake lead to any positive source, that will fry shit, it needs to be run to a switched negative.
    That's how I saw it and why I ran it to ground. When it wasn't hooked to anything I got the "Parking Brake" notice. Now that I have it hooked to ground, it works fine, except for the "No Signal" notice. Can anyone tell me what type of signal/voltage the video in is looking for? I'd like to get rid of the "No Signal" notice when I'm listening to my Zune.




Closed Thread

Similar Threads

  1. Jvc kd-avx77
    By bigeasy7 in forum Head Unit Reviews
    Replies: 0
    Last Post: 03-14-2010, 12:31 AM
  2. Kdc-x991 for a JVC-AVX77?
    By jdmprelude in forum Head Units
    Replies: 3
    Last Post: 09-29-2009, 11:57 AM
  3. Similar decks to JVC KD-AVX77?
    By takethecake in forum Head Units
    Replies: 1
    Last Post: 07-08-2009, 01:55 PM
  4. popping
    By scplayboy00 in forum Wiring, Electrical and Installation Help
    Replies: 1
    Last Post: 10-25-2006, 08:32 PM
  5. popping
    By bdavies11 in forum Speakers
    Replies: 4
    Last Post: 11-18-2005, 08:47 PM

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts

1e2 Forum