Can an northstar explorer 538i fit on to say,a northstar 657 etc power cable?.. Thnx

This website sells replacement CCFL Tubes and upgrades to LED backlights.
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replace the gps receiver if its external if internal good luck

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From the owners manual (page 78, link below) NMEA out (+) is the white wire and NMEA (-) or ground is the black wire.

-Steve


http://www.northstarnav.ca/upload/Northstar/Documents/EXPLORER_650.pdf

It appears that the back-light, a Cold Cathode Fluorescent Tube about 3mm diameter, is not working.
There are two likely causes.
1. Tube has failed.
2. High Voltage supply circuit has failed.

I'm currently pulling my unit apart to determine the cause. I suspect the tube is the problem but I will post more when I have it apart

Does anyone know what the correct operating voltage of this Cold Cathode Fluorescent Tube is? Northstar could not provide me with a service manual.

The screws are 1/16" or similar Allan Screws (about 1.6mm internal between flats). They usually can be undone with a 1/16 Allan Key but some of the screws can't be unscrewed with this key.

I'm having difficulties uploading the photos at the moment but I will try and fix that.

I had the same problem with my 657 I found it was moisture inside the unit that was causing the low voltage alarm to go off pull it apart and let it dry out inside

the northstar 538 does not have an inbuilt aerial (that is the 538i). You need to attach a compatible aerial and then you will be fine.

Hi!

I'm afraid your best bet here would be to contact the manufacturer directly. Here's the customer contact page:

http://www.northstarnav.com/en/Support/Contact-Northstar/

Hope is is helpful to you and good luck!

If it is connected to the boat motor check the voltage that is coming from the engine and clean the battery post. This solved the screen flickering.

If you don't want to do that just call Northstar customer support and see what they suggest.
Phone (Toll-free) 1-800-628-4487 or (Direct) 603-324-2042
That will get you better support.

BACKLIGHT IS CACTUS