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Thread: Help with my intel mini and p1900

  1. #11
    Variable Bitrate skippy911's Avatar
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    I think it was just a fluke. I left the mini in sleep all night in the car and came out this morning and she powered on perfectly. Now a new issue There is horrible and I mean horrible interferance in the audio when it comes back from sleep until I press play on frontrow. This also happens when the mini is booting up, until it gets into osx, then the noise goes away (well not completly ie I turn the volume up to max on the headunit and I can hear a tiny hum). What could possible do something like this? I would think if a groundloop it would always happen, but it only happens if:

    A: Mini is first booting from cold boot
    B: Mini woke up from sleep, before I press play in frontrow

    I have my aux-in for the headunit, which runs through a relay grounded at the same point as the ground for the p1900.

    Again any help would be greatly appreciated I am almost there now I can see the hill now I just need to climb to the top and roll my *** down hehe.

  2. #12
    CarFrontEnd Creator iamgnat's Avatar
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    Quote Originally Posted by skippy911
    What could possible do something like this? I would think if a groundloop it would always happen, but it only happens if:
    Sounds like a loop to me. Try picking up an isolator from Radio Shack (<$5 I think) and see if that helps. If it does, you can either leave it in or try fixing the grounding.

    Just because both items are grounded at the same location does not mean that the location itself is a good one. You might need to move it around to find a better spot. Also make sure your ground leads aren't too long from either device, if they are that can cause the issue too (I know sub 12" is the rule of thumb for AMPs).

    Where is your relay getting it's power? If it is off the internal system rather than the battery, grounding it and the p1900 at the same point (or close to each other) could be a bad idea.

    What happens when you run straight to your AUX-In and skip the relay? (if no issues there, i'd say separate the grounds)

    -dave
    My pathetic worklog.
    CarFrontEnd (now it's own sub-forum!!!!)

  3. #13
    Variable Bitrate skippy911's Avatar
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    relay gets its power from the cig lighter in the car. I am using that same power to be the yellow ign on for my p1900. The p1900 is wired direct to the battery for its power (red wire). Also my car doesnt normally have aux in, I had to do a mod and put the relay inline with the headunit to allow for aux in.

    EDIT: here is the aux in mod I did. http://clublexus.com/forums/showthread.php?t=215793

  4. #14
    Variable Bitrate skippy911's Avatar
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    I snuck outta work and ran over to radioshack across the street and purchased thier groundloop isolater, it was 16.99 btw Great news is I tested it and it seems to have removed almost all the noise but not everything. Something new has cropped up which I remember someone else mentioning, the sound output on the mini is kinda low. I have frontrow cranked all the way up, the main mini volume cranked to the top, and my headunit almost all full blast and the sound is still kinda low. Louder than girl would like to hear but not loud enough for me. Does the mini need a line level amp? If so what would a good one be?

  5. #15
    CarFrontEnd Creator iamgnat's Avatar
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    Quote Originally Posted by skippy911
    That's a cool mod, but it looks like a ground loop and a half waiting to happen

    -dave
    My pathetic worklog.
    CarFrontEnd (now it's own sub-forum!!!!)

  6. #16
    CarFrontEnd Creator iamgnat's Avatar
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    Quote Originally Posted by skippy911
    I snuck outta work and ran over to radioshack across the street and purchased thier groundloop isolater, it was 16.99 btw Great news is I tested it and it seems to have removed almost all the noise but not everything.
    Ouch. Sorry about that. Never had to get one myself, I thought I read that was the price on a another thread. Glad it is helping though.

    I imagine the isolater is stripping out some of the power. I had issues with my old TiBook not producing enough volume at the highend and completely cutting out at about 30% going directly to my AMPs, but my Mini doesn't appear to have that issue.

    I know you won't be a fan of it, but I think that relay (it is really cool though) is going to continue to give you grief. If you want to keep a head unit, I would suggest buying an aftermarket unit that supports AUX-In

    -dave
    My pathetic worklog.
    CarFrontEnd (now it's own sub-forum!!!!)

  7. #17
    Variable Bitrate skippy911's Avatar
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    I cant do a new headunit, problem is that lexus has their a/c controls in with the headunit. Loose the headunit loose ac

  8. #18
    CarFrontEnd Creator iamgnat's Avatar
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    Quote Originally Posted by skippy911
    I cant do a new headunit, problem is that lexus has their a/c controls in with the headunit. Loose the headunit loose ac
    Ahh. I hate that stuff

    That's was the big reason I went with my Escape over a Prius (though now that they have access to the monitor and TS....)

    -dave
    My pathetic worklog.
    CarFrontEnd (now it's own sub-forum!!!!)

  9. #19
    Variable Bitrate skippy911's Avatar
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    I am totally about to give up on this whole mac in the car thing. I went back out to the car after a few hours and I had to unplug and replug the volume to get it to detect that I had volume plugged in, like what happened to you. After that it was working great. I went for a little drive, about 10 min, then turned off the car. after about 30 min I got back in the car and the p1900 would not boot! The fan spun but the lcd, and the mini never came back on. The mini was still flashing like it was asleep. I pressed the button and the mini came on, but the screen didnt. I shut off the car again and then everything started fine. Do I have a faulty p1900? after about 20min then my powermate died! It was lit up but it would not control anything. I am about to throw out the entire system and go to a windows pc again bc this is driving me nuts. Any ideas?

    EDIT: I also decided to get Mike's expert help on this. Ill post anything he tells me incase others run into these issues as well. Im hoping its just a faulty p1900 bc I cant think of anything else it could be.

  10. #20
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    Quote Originally Posted by skippy911
    I snuck outta work and ran over to radioshack across the street and purchased thier groundloop isolater, it was 16.99 btw Great news is I tested it and it seems to have removed almost all the noise but not everything. Something new has cropped up which I remember someone else mentioning, the sound output on the mini is kinda low. I have frontrow cranked all the way up, the main mini volume cranked to the top, and my headunit almost all full blast and the sound is still kinda low. Louder than girl would like to hear but not loud enough for me. Does the mini need a line level amp? If so what would a good one be?
    I'm using http://www.discountcarstereo.com/detail.aspx?ID=317

    in my prius. With it I can get the volume for the mini match the head unit (still have to up the volume on the mini to about 2/3 to get it to match.

    I'm getting touch screen coordinates from the prius CAN bus. The prius has a lot more data coming out of the CAN then most cars do, but it's possible you could get it out of your Lexus. I cheated and I'm using the CAN-view to do all the hard work for me. See my site for details http://www.kusnetz.net/prius/

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