Operational Instructions - Humminbird LCR 4x6 Operation Manual

that in about one second you will see images appear on the right side of the display and moving
to the left.
TROUBLE SHOOTING: If nothing happens when the "Power" button is pushed, check your
electrical connections and fuse. Also check that the red wire on the power cable is connected to
the positive battery terminal and that the black wire is connected to the negative battery terminal.
If these wires are reversed it will not damage the LCR . It is normal if when reversing the boat, the
bottom return is lost, since air from the prop is being forced under the transducer. Remember the
transducer cannot transmit through air.
TROUBLE SHOOTING: If the display comes on when the "Power" button is pushed but no
bottom information is seen, check that the transducer connector is securely locked to the rear of
the LCR. Also insure that the transducer is completely submerged. A transducer cannot work
properly in air or through air bubbles in the water.
TROUBLE SHOOTING: In very shallow water, the bottom reading might have gaps of the range
might change to a deeper range. This is normal in about two feet of less. The automatic mode
cannot "lock" onto the bottom in very shallow water.
TROUBLE SHOOTING: If the LCR comes on without pressing the "Power" button, carefully
inspect the transducer cable. This condition will be seen if the outer jacket of the cable has been
cut and is touching any metal piece of the boat.
TRANSDUCER INSTALLATION TEST
After verifying that your LCR is working properly, you are ready to increase boat speed to test
the transducer installation. As you increase boat speed the LCR should give a continuous bottom
return. With a proper transducer installation your LCR will perform at speeds up to 75 miles per
hour.
TROUBLE SHOOTING: If at high speeds the bottom return is not continuous or there are gaps
in the bottom, then the transducer installation or location is such that air is going under the
transducer face. Refer back to the transducer mounting procedure for adjustments or for other
mounting options.
TROUBLE SHOOTING: If at high speed and high sensitivity setting the display begins to
blacken, then cavitation noise from the propeller is being received by the transducer. The
transducer should be moved away from the prop or to another location to reduce the cavitation
noise.
TROUBLE SHOOTING: If when making a hard turn, the bottom reading is lost, it is the result of
the transducer coming out of the water during the turn.

OPERATIONAL INSTRUCTIONS

The LCR4x6, while being a technically advanced, state-of-the-art depth sounder. Is probably the
easiest unit to operate. Only 7 buttons control all of the unit's features.
1. This button turns the unit on and off. Pressing it once turns the unit on. Pressing it again turns
the unit off.
2. This button stops or freezes the display. Pressing it once stops the display. Pressing it again
starts it back up.
3. This button turns the night light on and off. Pressing it once turns the light on. Pressing it
again turns it off.
4. This button allows you to select any of eight functions for easy adjustment right on the unit's
screen.
5. This button allows you to move a function up or increase it.
6. This button allows you to move a function down or decrease it. It is also the "store" key for
screen memory.
7. This button allows you to turn a feature on and off.