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Old 09-10-2001, 05:21 PM   #1
paultg
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'09 Impreza OBS (Blk/Gry)

Unhappy Need some advice diagnosing a problem.

Here is my stystem components:
Pioneer Premier DEH-P520 Head Unit
Boston Acoustic Rally 6.5" Components (front) and Rally Coaxials (rear)
JL Audio 8" IB4 Subwoofer
Alpine MRV-F307 4-Ch Amp for the Front and Rear Speakers
Alpine MRV-T303 2-Ch Amp Bridged for the Sub

I ran 12 ga. speaker wire throughout the car, 4 GA power wire to the trunk which splits to 8 ga for each amp.

My problem is:
My Premier headunit keeps overheating.

This weekend I tried a few things to try and fix the problem:

1) I relocated the crossovers from behind the radio:
Old:


To where the arrows are pointing in this picture, one Crossover on each side of the dash.
New:


I also adjusted the amplifiers. I had the gain on the 4-Ch amp set low, at .35 (Range is 0-1.0) for both A & B sides. At this settting I had to use a volume of around 30 (Range is 0-50) on the headunit to hear music while traveling. So I increased things to .55, and also adjusted the sub amp the same amount. Now I can hear things with a volume settting around 20-25.

All these things seemed to help, but the head unit will still overheat after about an hour of continuous play.

My question is:
Is there anything else I can do to help this problem, or is my headunit just defective? I don't want to send it back until I am sure it is not some setting I have wrong. So, if anyone else has some ideas, or wants to point out anything I might be doing wrong, please let me know.

Thanks in advance,

Paul G.
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Old 09-10-2001, 05:53 PM   #2
lenyx
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As I recall from looking at the premier units they're extremely hot by nature. I remember playing one of my cd's in a display model for a few minutes and then taking it out and thinking "Damn.. glad it didn't melt it". So I'd say it's probably not anything you're doing... seems to be the case with all of them.

Anyone else?
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Old 09-10-2001, 05:57 PM   #3
North Ursalia
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Paul, here's that photo I took... I haven't come up with any new ideas though I'm afraid... Paul's crossovers are tucked here now:




Brian
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Old 09-10-2001, 06:51 PM   #4
paultg
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Thanks Brian, that pic came out better than I thought.

lenyx, thanks for the comments. I had a Pioneer DEH-P6000 before this, and it did not get nearly as hot. I can't hold some of the Cd's when I take them out because they are so hot. So, maybe it is not just me.

Paul G.
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Old 09-10-2001, 08:54 PM   #5
blue5spdwrxwagon
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What if you tapped into the A/C ducts in the dash and routed a cool air jet to the back of the headunit. All it would take would be some 1" flexible hose and some duct tape.
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Old 09-10-2001, 09:13 PM   #6
paultg
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That is on my list of things to try I think, and/or maybe a computer fan mounted back there. I don't really want to do all that if I am just fixing a Pioneer problem, which eventually can get worse. I figure if the head unit is actually bad, then it will only get worse.

I guess my real question is:
Is this a common thing, or do you think the head unit is bad?

Thanks for all the advice.

Paul G.
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Old 09-11-2001, 12:57 AM   #7
joe z
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1.is it heating up and turning off or just getting hot??

2.is the sound cutting out to( if it does does the radio stay powered or does it turn off)/??
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Old 09-11-2001, 06:07 AM   #8
paultg
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Joe, it is heating up and then turning the CD off, displaying a message "Heat". I can switch modes and turn the radio on, but the CD player wont play. I usually take the Cd out, and leave the face down to let things cool off.

This past weekend I listen to the radio only for about an hour, then flipped the Cd on (CD was already in the head unit). It was already too hot, and displayed the "Heat" message and never played.

Paul G.
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Old 09-11-2001, 08:23 AM   #9
MY99 2.5GT
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I had a problem in my other car when I installed my Sony HU.

1. To wire in the CD player did you use an aftermarket quick splice wiring harness with factory connector or did you actually take a meter and splice in power to power, ground to ground and all that without a wiring harness and connector.

Don't get me wrong I am all for those easy interface wiring harnesses and connectors that you can solder you HU wiring into then just clip it into the factory harness. The problem I had was a bad ground in the factory wiring. I haven't experienced that in my Subaru but it is an idea.

If you haven't already done this, give the CD player its own ground. There should be a nice place right around the front area there that you can make a good ground connection. Take the ground wire out of the harness directly from the back of the CD player and ground it up front. Make sure that you even sand off any primer or paint that could inhibit conductiveness.

Let me know if that helps. If not I would suggest that you get you HU warranty repaired.

Brad
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Old 09-11-2001, 09:41 AM   #10
lenyx
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Default You're not alone

Found this for ya:

http://forum.sounddomain.com/ubb/For...ML/004052.html

Basically it's not you... and if you decide to keep the hu you're gonna have to get creative fixing pioneer/premier's bad design.

Some pc fans might just do the trick.. maybe you could add a toggle switch so they'd only be on when you need them.. toggle switches are fun .. and you can lie about what they do "Is that nitrous? No it's my trunk mounted stealth jet engine actuator"
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Old 09-11-2001, 11:51 AM   #11
paultg
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Hey, thanks. I was planning on wireing the fan to the power antenna lead so it is only on when the radio is on.

Maybe I will try that.

Paul G.
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Old 09-11-2001, 05:39 PM   #12
Zombie
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don't listen to me but you might want to check the wires from the built in amp they might be shorted out. that is all i can thank of.

zombie
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Old 09-11-2001, 06:05 PM   #13
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I have a panasonic 150 deck. I find that it gets really hot unless i turn the brightness down as far as it will go on the display.

If yours has adjustable brightness, maybe try bringing it down to see if that helps any either.
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Old 09-11-2001, 08:02 PM   #14
paultg
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MY '99 2.5GT (Brad):
Thanks for the reply. I did not see it before. I will give that a shot, and also add a fan if that does not work. If those don't help, I may turn the gan up on the amps again and see what happnes. I have a two year warranty on the headunit, so I have time to send it back, I just bought it last January.

Zombie, I don't know exactly how I would do that without taking the headunit apart. I don't want to void the warranty either, but thanks for the idea. I'll keep it in mind.

Tukit, the unit does have a "dim" setting, but it only dims the stereo display one notch when the lights on the car are turned on. Another good idea though. Since I have my parking or headlights almost all the time, I'll try to use it and see if it helps at all.

Thanks for all the advice. Please keep it coming.

Paul G.
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Old 09-11-2001, 11:19 PM   #15
Zombie
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classic miscommunication i meant the wires coming out the back of the headunit, i just know that i miss the most simple things some times.

zombie
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Old 09-12-2001, 12:45 PM   #16
paultg
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bump.. Any other ideas or does anyone else have problems like this with a Premier headunit?

Paul G.
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