Boating - Page 9 - Recent Questions, Troubleshooting & Support
Northstar
Explorer 657
GPS/ Fishfinder
Screen
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.
8/5/2022 11:17:58 AM •
Northstar...
•
Answered
on Aug 05, 2022
To wireup 160c Garmin fishfinder, there are seven
You only need the red and black wires to supply power to the unit. The red positive wire goes to a positive terminal on your battery or positive side of a bus bar or switch, the black negative wire goes to the negative terminal on the battery or negative common bus bar. Do not try to earth the black wire to an aluminum boat hull... You are asking for trouble! Best to run the black wire straight back to the negative battery terminal or negative bus bar that is wired to the negative battery terminal.
The other colored wires on the 160C plug are used for interfacing with NMEA2000 compatible devices, like a compatible GPS.
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