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MAINTENANCE AND WARRANTY 

TROUBLESHOOTING 

 

Second, inspect the transducer cable from end to end for breaks, kinks, or cuts in the 
outer casing of the cable. Also ensure the transducer is fully submerged in water. If the 
transducer is connected to the unit through a switch, temporarily connect it directly to 
the unit and try again. If none of these items identifies an obvious problem, the 
transducer itself is probably the problem. Be sure to include the transducer if returning 
the unit for repair. 
 

3.  There is no bottom reading visible on the display.

 

 
There are a number of possible causes for this condition. If the loss of bottom 
information occurs only at high boat speeds, the transducer needs adjusting. If the 
digital depth readout is working but there is no bottom visible on-screen, it is possible 
the depth range has been adjusted manually to a range lower than what is needed to 
display the bottom. Also, in very deep water, it may be necessary to manually increase 
the sensitivity setting to maintain a graphic depiction of the bottom. 
 
If you are using a transducer switch to connect two transducers to the unit, ensure the 
switch is in the correct position to connect a transducer that is in water. (If a trolling 
motor transducer is selected and the trolling motor is out of water, no sonar information 
appears.) 
 
It none of the above solve the problem, inspect the transducer cable from end to end for 
breaks, kinks, or cuts in the outer casing of the cable. If the transducer is connected to 
the unit through a switch, temporarily connect it directly to the unit and try again. If none 
of these items identifies an obvious problem, the transducer itself may be the problem. 
Be sure to include the transducer if returning the unit for repair. 

 
4.  When in very shallow water, I get gaps in the bottom reading and inconsistent 

digital depth indication.

 

 
Your Humminbird fishfinder will work reliably in water 2’ (.6m) or deeper. The depth is 
measured from the transducer, not necessarily from the surface. 
 

Summary of Contents for LCR 400 ID

Page 1: ......

Page 2: ...5 INSTALLATION 6 Transom Installation 6 Inside the Hull Installation 10 Control Head Installation 12 Test the Installation 15 BEFORE BEGINNING 16 USING THE LCR400ID 18 Using the Built In Simulator 18...

Page 3: ...boat designs including aluminum Please carefully consider the following before installing your transducer TRANSDUCER MOUNTING OPTIONS A Transom Mount The Humminbird high speed transducer allows the tr...

Page 4: ...sducer is not supplied with your LCR but for an additional cost you may exchange your un used high speed transducer for a bronz thru hull The bronz thru hull transducer has a threaded stem which insta...

Page 5: ...in the center of the Bracket slots On some aluminum boats it may be necessary to use a wood back up plate It is important to use a silicone sealant between the screwhead and bracket in order to preven...

Page 6: ...cally in the three slots found in the bracket It is important to use a silicone sealant between the screwhead and bracket in order to prevent leaking Step 3 TRANSDUCER PIVOT ASSEMBLY Assemble the pivo...

Page 7: ...t holes in the bracket Slide the O ring on to the headed pin and insert it through the two parts Assemble by screwing the x3 8 allen head screw into the end of the pin and tighten See Figure G Step 5...

Page 8: ...achieve optimum results Step 7 CABLE CLAMPS Install cable clamps as necessary by drilling a 1 8 dia hole for the 8 screw supplied 2 INSIDE HULL MOUNTING PROCEDURE Warning In order to achieve proper re...

Page 9: ...y from storage or from contact with oils present in boats or marina environments Oil will cause the eye to lose the intimate contact with the water which is necessary for efficient operation The eye m...

Page 10: ...vided to mount this base to the boat Next place the gimbal bracket on the swivel base and attach with four small machine screws provided Place the LCR in the gimbal mount and make certain the rubber w...

Page 11: ...od is not recommended since the unit cannot be rotated INSTALLING THE CABLES Your LCR comes equipped with Humminbird s new Angle Lock power and transducer connectors The power connector is identified...

Page 12: ...t Install a 1 amp fuse between the red cable and positive post of your 12 volt battery If a fuse panel is available we recommend wiring the power cable into the fuse panel Note The LCR must be fused s...

Page 13: ...l travels downward until it strikes an object or the bottom then immediately echoes back to the transducer As the transducer receives these signals it converts them back to electronic signals for disp...

Page 14: ...ng bracket lets you easily adjust the viewing angle for optimum viewing Note also that some polarized glasses can affect your viewing by causing a rainbow or prism to appear if so tilt the unit slight...

Page 15: ...THE BUILT IN SIMULATOR The LCR 400ID includes a built in simulator that helps you learn to use your new equipment The simulator displays a typical underwater scene and lets you practice with the contr...

Page 16: ...SELECT This button is used to access the following functions for further adjustments Sensitivity Units Bottom Alarm Fish Alarm Zoom Bottom Lock Display Speed Depth Range Fish ID To adjust any of these...

Page 17: ...t it at 2 Sensitivity remains 2 settings higher than the normal automatic setting Pressing the ON OFF button when the SENS menu is displayed switches the unit of depth measurement between feet and fat...

Page 18: ...ng OFF Zoom provides an up close view To activate it select Zoom and press ON OFF The Zoom view initially begins at the surface pressing the Up or Down arrow adjust the Zoom depth The range of the dis...

Page 19: ...ber If Bottom Lock is the last function selected you can use the ON OFF button to switch Bottom Lock on and off without having to press SELECT first DISPLAY SPEED 6 Setting Display Speed Factory Setti...

Page 20: ...adjust the Depth Range with the Up or Down arrow key You can set the Depth Range up to 600 In this Manual Depth Range mode the bottom is not blacked in This lets you see a second return which is pref...

Page 21: ...Standard XHS 6 16 Portable XPT 6 16 Transducer Cone Angle 16 degrees Depth Ranges 0 to 15 30 60 120 180 240 360 or 480 plus 0 600 in manual mode Zoom Ranges 7 15 30 Unit Construction High impact Polyc...

Page 22: ...ul 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 t...

Page 23: ...h 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 it is not Check t...

Page 24: ...bottom Also in very deep water it may be necessary to manually increase the sensitivity setting to maintain a graphic depiction of the bottom If you are using a transducer switch to connect two trans...

Page 25: ...exceeds 20 VDC Some outboard motors do not effectively regulate the power output of the engine s alternator and can produce voltage in excess of 20 volts when running at high RPMs Your fishfinder disp...

Page 26: ...not covered by our warranty The customer is responsible for shipping charges to Humminbird Humminbird will provide ground UPS or Parcel Post shipping back to the customer free of charge This warranty...

Page 27: ...n three working days from the receipt of your unit This does not include shipping time to and from our factory Units received on Friday are usually shipped by Wednesday units received Monday are usual...

Page 28: ...d Canada hours are Monday Friday 8 00 a m to 5 00 p m Central time If after reading Troubleshooting you determine your unit needs factory service please attach a description of the problem and send it...

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