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MAINTENANCE AND WARRANTY
TROUBLESHOOTING
•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 105SX 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 105SX 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 105SX, use the following troubleshooting
guide before calling Customer Support or sending your unit in for repair.
The 105SX contains several tools that can aid in determining if there is a
problem and how to isolate and repair the problem in many cases.
1. Nothing happens when I turn the unit on.
Check the power cable connection at both ends. Be sure the cable is
connected correctly to a reliable power source—red lead to positive, black
lead to negative or ground. Ensure the power available at the mount is
between 10 and 20 VDC. If the unit is wired through a fuse panel,
ensure the panel is powered. Often accessory fuse panels are controlled
by a separate switch or the ignition switch. Also, often a fuse can appear
to be good when in fact is not. Check the fuse with a tester or replace it
with a fuse known to be good.