Maintenance – Insignia 350TX User Manual
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8. The screen begins to fade out. Images are not as sharp as normal.
Check the input voltage using Diagnostic. The 350TX will not operate on input
voltages below 10 VDC.
9. The display shows many black dots at high speeds and high
sensitivity settings.
You are seeing noise or interference caused by one of several sources.
Noise can be caused by other electronic devices. Turn off any nearby
electronics and see if the problem goes away. Noise can also be caused by
the engine. If engine noise is causing the interference, the problem will
intensify at higher RPMs. Increase the engine speed with the boat
stationary to isolate this cause. Propeller cavitation can appear as noise on-
screen. If the transducer is mounted too close to the propeller, the
turbulence generated can interfere with the sonar signal. Ensure that the
transducer is mounted at least 38cm (15") from the prop.
CUSTOMER SUPPORT
If you have any questions or problems with your Humminbird unit, contact
your local distributor.
Humminbird
108 Maple Lane
Eufaula, AL 36027
USA
MAINTENANCE