Pioneer Preimer 940
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=34769
Printed Date: May 04, 2024 at 12:51 AM
Topic: Pioneer Preimer 940
Posted By: chan4202
Subject: Pioneer Preimer 940
Date Posted: June 28, 2004 at 10:47 PM
Does the internal amp shutoff when rca's are hooked up?
-------------
Chandler Martin
Replies:
Posted By: sandt38
Date Posted: June 29, 2004 at 6:56 AM
With no load on the amps they will not be functioning, so yes.
-------------
Posted By: Ravendarat
Date Posted: June 29, 2004 at 3:30 PM
The amps still function but they dont do anything, if that makes any sense. They dont shut off or anything but they arent powering speakers so the amp isnt really drawing any signifigant voltage or anything.
-------------
double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: kgerry
Date Posted: June 29, 2004 at 4:21 PM
keep in mind tho that the output stage is still active.....so even if you are not using deck power, if you leave a wire bare you can still blow the output of the onboard power IC...even if you are not using the deck power make sure to crimp cap or tape up every speaker wire...... ------------- Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: chan4202
Date Posted: June 29, 2004 at 7:42 PM
Yeah today my cd player the 940 was working fine. I got out and turned the car off, when I came back it would not turn on. I later reset it and it worked for a while. Now it won't work anymore. Anyhelp.
-------------
Chandler Martin
Posted By: stevdart
Date Posted: June 29, 2004 at 8:21 PM
You said "...it would not turn on. I later reset it and it worked...". What resetting method did you use? How could it be reset if it didn't have power?
-------------
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: chan4202
Date Posted: June 29, 2004 at 8:29 PM
There is a button on the face, I pressed it in with a pen and it lit up. Now it won't do that.
-------------
Chandler Martin
Posted By: stevdart
Date Posted: June 29, 2004 at 8:40 PM
Sounds like the problem lies in the head unit, then. But check the ground connection, 12v power and blue switched wire.
-------------
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: chan4202
Date Posted: June 29, 2004 at 8:44 PM
I checked the ground and power wire, what is the blue switched wire? Is that the remote turn-on?
-------------
Chandler Martin
Posted By: Ravendarat
Date Posted: June 29, 2004 at 9:02 PM
how did yu "check the power wire". Did you actually use a meter and check for voltage or did you just look at the wire and figure it was fine. Be sure to meter the wire. Also check out the red ignition wire and make sure it carries 12v when the cars on.
-------------
double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: fuseblower
Date Posted: June 29, 2004 at 9:07 PM
From what you are saying it looks like you think that you have a wire that is shorting out. Make sure that all of your wires that are not being used are not touching anything that could cause them the arc out. Next check all of your power wires and ground. If everything is fine unplug your radio for at least an hour and see if this helps. If these steps don't work you may have a burnt out unit.
Posted By: chan4202
Date Posted: June 29, 2004 at 9:47 PM
OK i grounded the unit through a test light and then touched the 12volt to the 12 volt from the headunit and I get a light for a sec then it goes away????? I checked the harness and it is getting a ground and 12volt and i have around 14 volts in the red acc wire. I think it has to be something in the unit itself. But I dont understand how it would be working fine and then when the car is turned off then on it does not work anymore, and then it comes on and off again? Man this sucks
-------------
Chandler Martin
Posted By: chan4202
Date Posted: June 29, 2004 at 9:49 PM
On the power wire there is a large black box that is between the unit and the fuse. what is this thing and what is its purpose?
-------------
Chandler Martin
Posted By: fuseblower
Date Posted: June 30, 2004 at 7:40 AM
The large black box is a inline noise suppressor. You could have a bad suppressor. If you want to check to see of the suppressor is bad with out cutting your wires you could by pass the suppressor. This is a little weird but it works. Take a needle and stick it in the wire in front of the suppressor thus by passing it. Now touch the hot wire from the car to the needle and your unit should power up. If this works and your unit stay on you have a bad suppressor. The needle trick is good because you don’t have to cut your wire and the hole is so small that you can’t even see it once the needle is removed.
Posted By: kgerry
Date Posted: June 30, 2004 at 5:35 PM
check also for a slim white or tan cylinder on the red ( i think ) power lead... Pioneer was famous for using a fusable resistor on this wire instead of a fuse ( dont ask me why )... meter voltage on both sides of this FR and if it's bad cut it out of circuit and install a fuse holder instead....
-------------
Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: southside
Date Posted: June 30, 2004 at 5:53 PM
could that also be why there could be no memory in the deck without running it to the fuse box?
-------------
southsider
|