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531569-1_B - 955c ManE.qxp
3/4/2007
Troubleshooting
Before contacting the Humminbird® Customer Resource Center, please read
the following section. Taking the time to review these troubleshooting
guidelines may allow you to solve a performance problem yourself, and
therefore avoid sending your unit back for repair.
Chartplotter Doesn't Power Up
If your Chartplotter doesn't power up, use the Installation Guide that also
comes with it for specific confirmation details, making sure that:
• The power cable is properly connected to the Chartplotter control
head.
• The power cable is wired correctly, with red to positive battery
terminal and black to negative terminal or ground.
• The fuse is operational.
• The battery voltage of the power connector is at least 10 Volts.
Correct any known problems, including removing corrosion from the battery
terminals or wiring, or actually replacing the battery if necessary.
5:04 PM
Page 80
Display Problems
There are several main conditions or sources of possible interference that
may cause problems with the quality of the information displayed on the
control head. Look in the following table for some symptoms of display
problems and possible solutions:
80
Problem
Possible Cause
The control head loses
If the power output of your boat's engine
power at high speeds.
is unregulated, the control head may be
protecting itself using its over-voltage
protection feature. Make sure the input
voltage does not exceed 20 Volts.
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