Using Diagnostic - Humminbird 100SX Single Beam Operation Manual

USING DIAGNOSTIC

The 100SX contains a powerful diagnostic tool which can aid
in determining the cause of a problem. To enable Diagnostic,
power the unit on and use the DOWN ARROW button to
highlight the Diagnostic option on the initial screen.
Diagnostic can only be accessed at power-up.
After the menu times out, the first of two diagnostic screens
will appear. Upon enabling diagnostic, the 100SX will perform
a self-test. This test confirms the operation of all internal
circuitry. At the conclusion of the test, one of two messages
will appear; "passed" indicates that the internal test
discovered no failures. "Failed" indicates that a significant
internal problem was discovered and the unit will require
factory service. In conjunction with the failed indication will be
a code which indicates to the repair personnel where the
problem is.
Press MENU to advance to the second Diagnostic screen.
The second Diagnostic screen shows
I transducer connection and voltage input. The voltage input category is especially helpful in
diagnosing input voltage problems. The current input voltage will be displayed. If voltage
fluctuations or power supply in excess of 16 VDC or less than 10 VDC is suspected, use the
diagnostic screen to confirm input voltage. Often, small outboard motors do not effectively
regulate voltage when operated at high engine speeds. Use Diagnostic while running the boat at
high speeds to show the voltage gain. Also, if you are using the 100SX in portable configuration
or from the trolling motor battery, Diagnostic can be used to evaluate the health of the battery by
showing the current voltage.