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ADVANCED FEATURES
MAINTENANCE/TROUBLESHOOTING
MAINTENANCE
Your 425SX is designed to provide years of trouble free operation with virtually no
maintenance. Follow these simple procedures to ensure your 425SX continues to
deliver top performance.
• If the unit comes into contact with salt spray, simply wipe the affected
surfaces with a cloth dampened in fresh water. Do not use a chemical glass
cleaner on the lens. Chemicals in the solution may cause cracking in the lens
of the unit.
• When cleaning the LCD protective lens, use a chamois and non-abrasive,
mild cleaner. Do not wipe while dirt or grease is on the lens. Be careful to
avoid scratching the lens.
• If your boat remains in the water for long periods of time, algae and other
marine growth can reduce the effectiveness of the transducer. Periodically
clean the face of the transducer with liquid detergent. Pivoting the
transducer up in the bracket may allow better access for inspection or
cleaning.
• If your boat remains out of the water for a long period of time, it may take
some time to wet the transducer when returned to the water. Small air
bubbles can cling to the surface of the transducer and interfere with proper
operation. These bubbles dissipate with time, or you can wipe the face of the
transducer with your fingers after the transducer is in the water.
• Never leave the 425SX in a closed car or trunk—the extremely high
temperatures generated in hot weather can damage the electronics.
TROUBLESHOOTING
Do not attempt to repair the 425SX yourself. There are no user serviceable parts
inside, and special tools and techniques are required for reassembly to ensure the
waterproof integrity of the housing. Repairs should be performed only by
authorized Humminbird technicians.
Many requests for repair received by Humminbird involve units that do not
actually need repair. These units are returned “no problem found.” If you have a
problem with your 425SX, use the following troubleshooting guide before calling
your dealer or sending your unit in for repair. The 425SX contains several tools
that can aid in determining if there is a problem and how to isolate and repair the
problem in many cases.
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