promos 425 power led flashing
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=123577
Printed Date: July 06, 2025 at 5:20 AM
Topic: promos 425 power led flashing
Posted By: addicted
Subject: promos 425 power led flashing
Date Posted: September 19, 2010 at 1:21 AM
i set front channels bridged@ 1 ohm. using 2 ED 7kv.2's , gain set 1/4, ( kept it low) ran clean for aproximatly 15 min. now my power LED flashes. amp was not hot, fuse not blown, double checked proper voltage from remote lead. ( i was told these amps need proper remote voltage.) im stumped. anyone know what the flashing led meens, diagnostic code perhaps?
Replies:
Posted By: i am an idiot
Date Posted: September 19, 2010 at 6:58 AM
These ED speakers, are they woofers? Is that amp capable of 1/2 ohm per channel?
Posted By: addicted
Date Posted: September 19, 2010 at 9:40 PM
yes they are 6.5 inch woofers 4 ohm dvc's. the amp is .5 ohm stable stereo, 1 ohm bridged.
Posted By: i am an idiot
Date Posted: September 19, 2010 at 10:01 PM
I am not at all familiar with your amp, but the only thing I can figure is that is it's version of a protection light.
If yoiu can remove the cover and take a picture of the circuit board, I may be able to help you troubleshoot the amp.
Posted By: addicted
Date Posted: September 23, 2010 at 11:39 PM
i will post pix soon thanx for ur assistance.
Posted By: addicted
Date Posted: September 28, 2010 at 11:26 AM
i realize it would be hard to diagnos online... ill be taking this to a shop. ppi nolonger in business.
Posted By: addicted
Date Posted: September 28, 2010 at 11:39 AM
Posted By: i am an idiot
Date Posted: September 30, 2010 at 3:57 AM
DO NOT EVER APPLY POWER TO THIS AMP WITH THE BOTTOM COVER REMOVED.
The 24 devices at the bottom of the picture are the output transistors. There should be (6) 2n6487 and (6) 2n6490 per channel. Using a digital meter set to the diode test function, place and hold one lead on the metal tab of the device, Now touch the other lead to first the leftmost leg of the same device. Notice that reading. Move the lead from the leftmost leg to the rightmost leg. Notice that reading. Check one transistor in each group. Post readings of all 4.
|
