Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 03-08-2010, 01:54   #1
Registered User

Join Date: Jun 2010
Posts: 24
GPS Freezing

I got strange problem with GPS. While motoring, after an hour or so my GPS freaks out. The set is: GPS: Evermore SA-920 (rs232), connected to Navicom rt-650 VHF. After sometime on the motor it starts to show some bizzare characters in place where long/lat/SOG/COG shoud be. Switching the VHF off and on, then NO GPS INFORMATION show up. Sometime it starts working for few seconds then freaks out again. It looks like it happens only during motoring, and only after and hour or so since starting the engine. The GPS cable goes through engine compartment but slight amount of heat shouldn't affect it at all. Has anyone had similar problem?
__________________

__________________
Sakura is offline   Reply With Quote
Old 03-08-2010, 02:29   #2
Registered User
 
Viking Sailor's Avatar

Join Date: Nov 2006
Location: San Francisco Bay
Boat: Fantasia 35 - s/v Feeling Good
Posts: 1,074
My guess is that your charging system is putting out more voltage then the GPS can handle. This could be do to a bad or incorrectly adjusted regulator. The reason that it take a hour before the GPS quits is because in that hour the batteries are being charged which causes the voltage to be low enough for the GPS to work. You can check this by switching off the charger and see if the GPS starts working again. Also, you can measure the charging voltage. If voltage is above what is recommend for the type of batteries you have that is a real problem for both the GPS and the batteries.

__________________

__________________
Viking Sailor is online now   Reply With Quote
Old 03-08-2010, 08:44   #3
cruiser

Join Date: Oct 2007
Posts: 751
I'd hunt around the ground wire for the GPS and see if it is on a different ground than the VHF.
__________________
ActiveCaptain is offline   Reply With Quote
Old 03-08-2010, 11:41   #4
Registered User

Join Date: Jun 2010
Posts: 24
Interesting idea with high voltage, haven't thought of that. Usually at fully charged batteries with motor on it's around 14.1V, with motor off 13.8V Gonna have check this one then. As for the gorund - NMEA ground is the same as in VHF, and GPS is drawing power from same wire with VHF - therefore same ground here as well.
Cheers
__________________
Sakura is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
CruisAir System Freezing Up on Heat Cycle Big Moe Plumbing Systems and Fixtures 8 07-05-2015 07:04
New Member Freezing in Florida gardnsailor Meets & Greets 16 31-03-2010 08:04
Furuno GPS - 'GPS Week Number Rollover' bitman Navigation 0 25-11-2009 04:53
New GPS? Zach Marine Electronics 0 22-07-2007 20:29



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 13:57.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.