Users may not create topics, posts, or private messages containing or relating to the following material (especially pertaining to Motorola copyrighted software, unless you want Motorola to come along and shut this site down):

  • Listing for sale or trade of, or links to sites offering for sale or trade of, or giving away, Radio
    Service Software (RSS) or Customer Programming Software (CPS)
  • Profanity, pornography, defamation, or slanderous remarks directed towards any individual or entity
  • Commercial advertising (except in the Batboard Vendors forum, as approved by the Admin/Mod Staff)
  • Any other items which may be deemed as offensive

If any topics, posts, or private messages containing or relating to the aforementioned material are brought to the attention of the Admin/Mod Staff, they will be deleted.

Additional FAQ items appear here in Forum Rules. Please review them for posting guidelines and further clarification.

PM400 voltage alarm

The General forum is where users can discuss any topic regarding Motorola communications equipment - hardware, software, etc. There are also several focused forums on this board, so please take the time to ensure that your questions doesn't fall into one of those categories before posting here!

Moderator: Queue Moderator

Post Reply
kb2dem
Posts: 47
Joined: Sun Jan 13, 2002 4:00 pm

PM400 voltage alarm

Postby kb2dem » Tue Dec 31, 2013 8:52 am

Is this a programmable option, beeps on transmit when my truck is running. Now also beeps on my power supply in the house


Thanks
Warren
Top
Al
Posts: 1045
Joined: Tue Sep 04, 2001 4:00 pm

Re: PM400 voltage alarm

Postby Al » Tue Dec 31, 2013 2:07 pm

Not programmable. Fixed by the voltage sensing hardware in the PM400. Try measuring the actual voltage at the PM400 power connector under a transmit condition. You may find that it's low enough to trigger the low voltage sensing circuitry. Solution if this is the case: check for high resistance in the power cabling or undersized conductors.
Top
turtle9832
Posts: 154
Joined: Sun Mar 14, 2010 12:26 pm

Re: PM400 voltage alarm

Postby turtle9832 » Wed Jan 01, 2014 9:19 am

I had this same problem on a pm400. The radio was working fine in a vehicle. The radio was moved to another vehicle. The installer incorrectly installed the rear accessory cable for ign sense. The radio then was having low output power on tx along with the low voltage alarm on tx. Radio was removed and sent in. Depot replaced a board (I believe the depot report said it was a Q100 module or board). Radio was properly re installed and works fine now. The original installer related that the incorrect ign sense was not the cause of the board failure. The second installer said it was. If you need the part that was replaced verified, let me know.
Top
Post Reply

Return to “General Motorola Solutions & Legacy Radio Discussion”

Who is online

Users browsing this forum: No registered users and 6 guests