TABLE OF CONTENTS

INSTALLATION PREPARATION. Parts Supplied. Accessories. Installation Overview. Alternative Transducers and Mounting Methods. Transducer Exchange INSTALLATION. Transom Installation. Inside the Hull Installation. Control Head Installation. Test the Installation 15
INTRODUCTION. 16 USING THE LCR 4000. Total Screen Update. Operational Instructions Learning to Use Your LCR. Learning to Read the Display. MAINTENANCE AND WARRANTY. Maintenance. Troubleshooting. Warranty. Service Policy Customer Support. 41
TRANSDUCER MOUNTING PROCEDURE Humminbirds high-speed transducer is supplied with your LCR. This transducer has been designed to give good high speed readings on most all 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 transducer
element to be mounted below the bottom of the boat hull keeping the transducer out of turbulent water and insuring good high speed operation. The transducer will absorb the blow of any obstruction by rotating up out of the metal spring bracket without harming the transducer, or your boat. The transducer can be re-engaged by simply rotating the transducer down and snapping it back in place. (See Figure A)
B. Inside Hull Mount- The high speed transducer can be mounted inside the hull (without pivot assembly) using the proper two-part epoxy, such as Humminbirds epoxy kit. Even though there is some loss of signal in shooting through the hull, your LCR will perform well with this type of installation. You cannot shoot through the hull of an aluminum boat. C. Trolling motor Mount- This type of transducer is not supplied with your LCR. It is designed to mount on the foot of a trolling motor. You may exchange your un-used high speed transducer for a trolling motor transducer. Call the Humminbird Customer Service Department. D. Bronz Thru-Hull Mount- This transducer 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 installs through a hole drilled in the boat hull, leaving the housing exposed under the boat. This type of installation must be used for many boats with in-board engines, because there is no suitable location on the transom away from the noise and turbulence created by the prop. A bronz thru-hull transducer should be installed by qualified personnel only. The LCR will operate well at high speeds with a properly mounted transducer. Remember, a transducer will not work transmitting through air or through air bubbles.
1. TRANSOM MOUNTING PROCEDURE Step 1. MOUNTING LOCATION- It is important that the transducer be mounted on the transom where water flow is in constant contact with the transducer. You may wish to observe the rear of the boat while it is moving through the water to determine the best mounting location.
Step 2. BRACKET INSTALLATION (Aluminum Boats)- To install the metal bracket on an aluminum boat locate the template on the transom between rows of rivets, or ribs that are on the bottom of the boat. Align the template so that the bottom corner of the template nearest the center of the transom is on the bottom edge of the transom.
Once the location is determined mark and drill three 7/64 dia. holes noted on the template. Attach the metal bracket using three #10 self threading screws supplied. Be sure to align holes 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 prevent leaking. (See Figure C)
Step 2. BRACKET INSTALLATION (Fiberglass Boats)- If your boat has a stepped transom located below and under the main transom, the compact transducer design allows mounting in this area. This mounting location is recommended for good reading at very high speeds. (See Figure D)

To install the metal bracket on a fiberglass boat, locate the template on the transom in the same manner as for an aluminum boat. (See Figure C)
NOTE: On boats with more than 15 degree deadrise angle it may be necessary to mount the transducer slightly off parallel with the water level. (See Figure E) Mark and drill the three 9/64 dia. holes as shown on the template. Attach the metal bracket using the three #10 self threading screws supplied. Be sure to align the holes so that they are centered vertically 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 pivot to the transducer main body using the two x5/8 allen head screws, two 3/8 tooth washers and two, square nuts. Make sure the tooth washers are sandwiched between the transducer main body and the pivot. The square nuts are trapped inside the pivot and will not rotate as the allen head screws are tightened. HOWEVER, DO NOT TIGHTEN AT THIS POINT. (See Figure F)
Step 4 TRANSDUCER ASSEMBLY- Insert the transducer assembly into the metal bracket from the bottom. Push up until the holes in the plastic pivot align with the uppermost 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 ANGLE ALLIGHMENT- Set the transducer angle so that it is parallel with the bottom of the boat hull. Once proper alignment is achieved, tighten the two allen head screws
using the 5/32 allen wrench provided. The screws are visible through the access holes on each side of the metal bracket. Check to make sure the transducer main body is rigidly fastened to the pivot. (See Figure H)
Step 6 CHECK POSITION OF TRANSDUCER- At this point, check to see that the bottom of the transducer is a minimum of below the bottom of the transom. (However, as noted in STEP 2, the top of the transducer cannot fall below the bottom of the transom). If it is not, remove the transducer assembly from the metal bracket by removing the pin installed during STEP 3. Loosen the metal bracket mounting screws, re-position the bracket utilizing its slotted holes, tighten and re-assemble. It may be necessary to replace the silicone sealant after this adjustment is made. NOTE: It may be necessary to make several high speed runs to adjust transducer either UP/DOWN or to re-adjust the angle to 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 results with this type installation, it is important that the transducer be mounted by someone familiar with the use of two part epoxy adhesives. For this reason, Techsonic Industries, Inc. will not be responsible for any damage due to the mounting of your transducer in this manner. NOTE: An Epoxy Kit (Part N. EPK) is available from Humminbird. This Epoxy Kit has been formulated for Inside Hull Transducer Installation. 1. Select as flat an area as possible near the aft end and center of boat where the hull is thin and not double. If the bottom has a runner down the center of boat, select an area to one side of the runner, but as close to the runner as possible. 2. Clean the inside of the boat with lacquer thinner in the area transducer is to be mounted. Outside of boat in this area should also be cleaned. (Not with lacquer thinner). 3. Put approximately one inch of water in the bottom of the boat.
4. Put transducer in the water. The bottom of the transducer should be in a flat area and should be in good contact with the bottom of the boat. 5. Operate the LCR with the boat operating at high speed. The transducer may have to be moved in order to find an area where satisfactory operation is observed. 6. When an area is found that produces satisfactory operation, mark the location of the transducer. 7. Remove the water and transducer and clean the marked area and the bottom of the transducer thoroughly. 8. Using the Humminbird Epoxy Kit or equivalent, mix an ample amount of epoxy without causing it to bubble and pour it in the area the transducer is to be mounted. The puddle should be larger than the bottom of the transducer. 9. Coat the bottom of the transducer with epoxy, then put it in the center of the puddle and push down on the transducer while moving it around in a circular motion. This forces out any air bubbles that may be trapped between the bottom of the transducer and the hull of the boat. 10. Let epoxy cure then the transducer is ready to operate. No water is now required in the bottom of the boat and gas and oil that is spilled inside of the boat will not degrade performance as it will if the transducer is placed only in water. CAUTION: Do not use the silicone seal or any soft adhesive to bond the transducer to the hull. This will reduce the sensitivity of the unit.

CAUTIONS

1. Occasionally the eye of your transducer may become dirty 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 may be cleaned with liquid detergent. 2. Improper installation of the transducer can alter the efficiency and accuracy of the entire system. 3. If your boat of transducer is out of the water for a period of time, it may take a short period of time for the transducer to become thoroughly wetted when returned to the water. Also, re-entry may cause turbulence, which will create air bubbles in the eye of the transducer. The bubbles will disappear in a short time or can be removed by rubbing the transducer eye with your fingers while the transducer is in the water. 4. If your instrument should fail to function, be sure to check all the electrical connections before removing the transducer or calling a serviceman. 5. Inspect your transducer cable and make sure that it has not been cut or damaged to the point where it will affect the performance of the transducer. A slight nick or cut, exposing the outer cable, can be repaired by wrapping with electrical tape. A transducer can be damaged if the inner cable and outer cable are allowed to make contact. Such a problem can sometimes be corrected by properly splicing the coaxial cable. This should only be attempted by a qualified service technician. 6. If your LCR is not working properly and you suspect the problem might be in your transducer, we would recommend you borrow a unit from a friend and try it on your boat. If the symptoms are the same, you can almost be certain that the problem is in the transducer.

INSTALLING THE LCR The LCR should be mounted on a flat, solid surface for maximum stability. The low profile swivel mount has four holes drilled in the base. It is recommended that all four holes be used. Position the swivel base and drill four diameter holes. Note: The LCR hole pattern Is the same as for all Humminbird flasher units. Use hardware provided 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 washers provided are placed between the unit and the gimbal bracket Important: Note which side of the gimbal faces forward. (Slots on gimbal bracket go towards rear). Also, rubber washer must be located between the unit and the gimbal bracket. Install the mounting knobs and tighten snugly. The unit can now be swiveled and tilted to any desired position.
OTHER MOUNTING OPTIONS 1. The LCR gimbal bracket can also be mounted on the SM-4, quick disconnect swivel mount. 2. The LCR gimbal bracket can also be mounted directly to the dash without the swivel mount, however, this method is not recommended since the unit cannot be rotated.
INSTALLING THE CABLES Your LCR comes equipped with Humminbirds new Angle-Lock power and transducer connectors. The power connector is identified with the letter P on the back of the plug. It plugs into the outlet on the back of the unit marked Power. The transducer connector is identified with the letter T and plugs into the outlet on the back of the unit marked
Transducer. Note: An adapter (AD-4) is available to allow use of an old waterproof (BNC) transducer with the LCR, but be sure that the transducer is a 16degree. A 32degree transducer cannot be used. A 11/8 hole must be drilled to pull through the transducer connector. After drilling the hole, pull the transducer connector up through the hole. If you are installing two units, both transducer connectors can be pulled through this 1 1/8 inch hole. Next, push the power cable wires down through the hole. A hole cover has been provided which will dress and hold the wires. Install the hole cover after determining the necessary wire length from the hole. The power cable has a red lead to the positive (+) post and the black lead to the negative (-) post. 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 separately from any other accessory. Your Angle-Lock connectors can only be plugged in one way. Position the connector so the letter P or T can be read and the 90 degree bend is pointed downward. Push the connector in as far as it will go. Turn the positive locking ring as far as it will go clockwise until you feel it lock. Locking ring as far as it will go clockwise until you feel it lock. Your connector is now locked into place. Note: For easy access to the connectors, simply loosen the mounting knobs and tilt your LCR forward. The connectors are now in full view and easy to plug or unplug.

INSTALLATION

TEST THE INSTALLATION TEST THE INSTALLATION Testing should be performed with the boat in the water, however you can initially confirm basic operation with the boat trailered. Press POWER once to turn the unit on. There will be an audible chirp when any button is pressed to confirm the button press. If the unit does not power-up, ensure the unit is fully seated on the mount and that power is available. The first screen provides four options: Start-up, Options, Simulator, and Diagnostic. A message at the bottom of the screen indicates the transducer connection. If no transducer is detected (or one is not connected), the message will indicate this and the unit will go into simulator after the initial screen times out. Note: the transducer must be submerged in water for reliable transducer detection. If a transducer is detected, the unit will enter Start Up or normal operation unless you choose another option. If you do not press any button before the timer reaches 0, the normal operation screen is displayed. If the boat is in water, sonar data appears. If the bottom is visible on screen with a digital depth readout, the unit is working properly. Ensure the boat is in water greater than 2 but less than the depth capability of the unit and the transducer is fully submerged. Remember the sonar signal cannot pass through air. If the unit is working properly gradually increase the boat speed to test high-speed performance. If the unit-functions well at low speeds but begins to skip or miss the bottom at higher speeds, the transducer requires adjustment. Refer to the appropriate transducer installation section for more detail. Note: it is often necessary to make several incremental transducer adjustments before optimum high-speed performance is achieved. Important: For Transom Mount transducer installations, install the third mounting screw after the final transducer adjustments.
Humminbird 3 Humminbird Lane Eufaula, Alabama 36027

USING THE LCR

INTRODUCTION Before attempting to install or operate your Humminbird LCR, it is recommended that you read the operations manual thoroughly. The LCR4-ID and LCR40-ID have a number of special features not found on other depth sounders. To completely understand all the features of your unit, we suggest you follow the instructions in this manual. If after reading the instructions, there is something you do not completely understand about the operations of your unit, we recommend you contact our customer service department- CALL (334)687-0503. INTRODUCTION Congratulations on selecting the LCR4-ID or LCR40-ID.Your unit uses advanced LCR technology to make it easy to use and easy to understand so that you will quickly learn the basics of operating your unit. It also incorporates the most innovative concepts available for finding fish, making it the first true fish finder ever made. Read this operations manual thoroughly for all the outstanding features of your LCR. You will be amazed at its capabilities. Since there are virtually no moving parts, your LCR will function more trouble free than any sonar unit you have ever owned. This unit has been engineered, tested, manufactured, and is guaranteed by the employee/owners of Techsonic Industries, located on the shores of Lake Eufaula, Alabama. Fishing, boating, and depth sounders are our business, and at Humminbird we stand behind our product 100%. Your new LCR is covered by our Lifetime Guaranteed Service policy. We wish you good luck, good fishing, and many hours of pleasure with your new Humminbird LCR. THEORY OF OPERATION Your Humminbird LCR works on the basic principals of sonar. An electronic signal is generated within the control head of the unit. When coupled to the transducer, this signal is converted to an ultrasonic signal and is transmitted toward the bottom. The speed of the ultrasonic signal traveling through the waters is approximately 4800 feet per second. The signal travels through the water until it strikes an object or the bottom. At this instant it is reflected back, picked up by the transducer, reconverted to an electronic signal and is recorded on the display of the LCR.

INTRODUCTION The reading at the far right hand position of the display illustrates that which is being passed over at that time. If you are familiar with a flasher unit, you might think of the information coming on the right side of the screen as the information that would be seen at one instant on a flasher (see Figure 1). However, unlike a flasher, this information is not lost but it is shifted or moved to the left as new information comes on. Therefore, the information is retained until it disappears from the left hand position of the display.
The display used on the LCR is a Liquid Crystal Display. The material in the display is a liquid that can be aligned such that it either "blocks" light or it lets light pass through. This blocking of light is what makes the dots on the screen. Since the LCRs display depends on light passing through it to make the images, increasing the light source will make it easier to see. This is why your LCR can be seen so well in direct sunlight. You will also notice that the display can be seen better at certain angles. The LCR mounting has been designed for tilting and pivoting so that you can easily maintain a good angle for viewing. Another characteristic of an LCR display is that you may find that some polarized glasses might affect the view by causing a rainbow prism to appear. This condition can possibly be improved by a slight adjustment in tint.
INTRODUCTION TheLCR4-ID and LCR40-ID use a special and very unique liquid crystal display. Ordinary LCD's have two colors-black and white. The black color, as was explained earlier, is made by blocking the light that comes into the display. The LCR4-ID and LCR40ID add a third color, red, by using a second layer on the display. If you look closely you will see that the red image is slightly above the black image. You will also notice that the red image is transparent, that is, you can see through it to the black and white image. This new display gives your unit the ability to display more information than ordinary two-color units:
1. Objects at least three inches off the bottom are displayed in red. The bottom and structure attached to the bottom are displayed in black. The electronics in the LCR4-lDand LCR40-ID can separate the bottom from objects at least three inches off the bottom no matter what depth range you are viewing. This means that fish close to the bottom will be easily seen on the LCR (see Figure 2). These same fish would be missed on an ordinary display because they would just look like part of the bottom. 2. Strong signals are displayed with a red dot over a black dot. The electronics can separate the strong fish echoes from the weaker fish echoes. This means that you will be able to find the bigger fish because they will be displayed with a red and black dot, making it easy to separate them from the weaker returns displayed in red only. You will notice a slight pink tint on the display. This is due to the additional layer on the LCD.

TOTAL SCREEN UPDATE TOTAL SCREEN UPDATE What is Total Screen Update? Total screen update is a unique feature of Humminbird LCRs. It will allow you, when changing depth scales, to totally change or update the screen to the new depth scale. It will allow you to zoom in and look at information in much finer detail even after youve already gone over the area. How Does Total Screen Update Work? Inside the LCR are memory devices which can store information. Automatically, while you're operating the LCR, the computer is putting information into the LCR'S memory. All this information is being put into memory in much smaller increments (pieces) than is being displayed on the normal full depth scales. For example, on the 0to 60 foot scale each dot is equal to one foot of depth, but the computer is putting information into memory such that each dot equals 2 inches. If after reading this, you don't understand how Total Screen Update works, dont worry. The important thing is that you understand how to use Total Screen Update. Read on How To Use Total Screen Update This is the easiest part. Since the LCRs computer is doing all the work, you will find the LCR Total Screen Update very easy to use. There are two ways that you will use Total Screen Update: 1. When changing a depth scale the LCRs computer will automatically change or update the entire screen to the new depth scale. This Total Screen Update feature works when changing to deeper or shallower scales. For example, suppose you are in the 0 to 120 foot scale but the bottom depth changes quickly to 20 feet. When the depth range is changed to the 0 to 30 toot scale, the entire screen will look just as if you had gone over the area on the 0 to 30 foot scale. 2. The second way that you will use Total Screen Update is in operating the LCR's Zoom or Bottom Lock. Since the computer has stored in memory information in very small increments, you will be able to recall this information from memory to get an expanded view of areas which you have already passed over.
OPERATIONAL INSTRUCTIONS For example, if you go over some interesting structure or fish, you will be able to zoom in for a better look without going back over the area. Simply activate the zoom and the information that is stored in memory will be recalled and the total screen will be updated (changed) to show the zoom information. Also, when you go back to the full depth range, the entire screen will be changed to look just as if you had been on that depth range all along. The operation of the zoom function is explained in a later section. OPERATIONAL INSTRUCTIONS The Humminbird LCR will operate fully automatic or manual at the discretion of the operator. At the heart of the LCR are 2 microcomputers which make thousands of decisions every second. With the LCR'S automatic features you will quickly and easily learn the basics of operating your unit, and after a couple of trips on the water you'll be operating the LCR like an expert. It is suggested that you familiarize yourself with each of the features and controls prior to operating your LCR. 1. Power: To activate the unit, depress the power On/Off'' switch. The LCR always comes on in the automatic mode. In the automatic mode, the unit will find the bottom by varying the sensitivity and selecting the proper depth range for a satisfactory return. Also, the bottom is blacked out to make the display easier to read. To turn the unit off, depress the power On/Off'' switch again. 2. Light: Depress the light "On/Off" switch to activate the display light for night or low light conditions. The light is turned off by again depressing the ''On/Off'' switch. When using the night light you will notice that the viewing angle, or best viewing position is different than during daylight operation. Tilt the unit back until you find the best angle for night viewing. 3. Identification Features: When the LCR is turned on, the ID (identification-red display) is automatically on. To turn the ID feature off, simply depress the ID on/off button. With the ID feature off, all dots will be black. To turn the ID feature on again, press the ID on/off button. Notice that the total screen update feature allows you to change the total screen each time you turn the ID feature off or on.

OPERATIONAL INSTRUCTIONS In bottom lock the expanded information always comes onto the screen at the same location. However, as the information moves across the screen and as the bottom contour moves up or down, the displayed information will also move so that you can see the actual bottom contour. Remember, in bottom lock, you will be seeing up from the bottom and this expanded area will move up or down as the bottom contour changes. When the bottom lock is activated, the LCR will change to the lowest depth range, so that the bottom can be tracked to the maximum depth. 6. Audible Alarms: The LCR is equipped with two audible alarms, a Fish Alarm and a Bottom Alarm. Fish Alarm: The LCR Fish Alarm will give a short alarm sound anytime a return is detected between the boat and the bottom. It will not alarm on the bottom, but only on objects off the bottom. To activate the Fish Alarm press the Fish Alarm On/Off button. The indicator in the lower part of the screen will indicate that the Fish Alarm is on. The Fish Alarm is operational only while the LCR is in the automatic mode. See Manual Mode in this section for use of the alarm in the manual mode. The Fish Alarm may occasionally sound when no target is displayed. This can happen when the display sweep speed is slow such that the target was detected but gone by the time the display is updated. To turn the Fish Alarm off, simply press the Fish Alarm On/Off button again. Bottom Alarm: The Bottom Alarm is activated by pushing the alarm On/Off button. When first activated the alarm is set at five feet. The desired alarm depth can he adjusted up or down by pressing the depth set button and the increase or decrease button. When the increase or decrease button is pressed once the alarm setting will change one division. If the button is held down the setting will move as tong as the button is held down. The alarm setting is indicated down the right side of the display. The Bottom Alarm may be set anywhere from 4 feet to the maximum depth. When the bottom enters the alarm range it will trigger a continuous audible signal. The Bottom Alarm will operate both in the automatic and manual modes, however the operation is slightly different depending on what mode is on.
OPERATIONAL INSTRUCTIONS Automatic Mode: In the automatic mode a continuous alarm will sound only when the bottom depth is equal to or less than the alarm setting. Fish entering the alarm range will not trigger the alarm unless of course the fish alarm is on. Manual Mode: In the Manual Mode either the bottom or fish can trigger the alarm. If the bottom depth becomes equal to or less than the alarm setting, a continuous alarm will sound. If a fish enters the alarm range, a short, quick alarm will sound. Since the fish alarm is active only in the automatic mode, positioning the bottom alarm range close to the bottom will allow you to have a fish alarm in the manual mode. The alarm depth will adjust itself when the depth range changes from one range to another. Thus a depth alarm set at ten feet while on the 30 foot depth range will remain at ten feet deep should the unit advance to any other range. To set the alarm with the most accuracy, set it using the lowest depth range. Turn off the Bottom Alarm by again pushing the alarm On/Off button. The alarm setting will then go to zero. If the alarm is turned on again before the unit is turned off it will still be set at the previous setting. 7. Display: Stop/Resume: Anytime during the operation of the LCR, the operator may "freeze" the display by simply pushing the display Stop/Resume button. This feature will aid in the learning and interpretation of the signal on your LCR display by giving you time to study the display. The "Stop/Resume" will not change any original settings when once again activated. Note: Sensitivity and display speed may not be changed while the display is stopped. When the Stop/Resume button is pressed again the unit will resume reading at the immediate point at which the boat is sitting on the water. 8. Display Speed: The LCR has a total of eight display speeds. When the unit is turned on the display will be advancing at a medium speed. To increase the display speed depress the button once or hold it down to change rapidly. An audible sound is heard each time the speed is advanced. When the limit has been reached a chirping sound will be heard. At this point the speed will be advancing at its maximum. To decrease the speed, simply depress the button until the desired advance is reached. The speed of the boat and display speed will have a large effect on the way information is displayed. You should select the fastest display speed for high speed operation, but use a slower display speed for idle or trolling speed.

OPERATIONAL INSTRUCTIONS 9. Depth: In the automatic mode, the proper depth range is found as soon as the unit is turned on. As you move into deeper water and the bottom goes off the screen the next deeper depth range will automatically be activated. Also, as you move into shallower water the depth range will automatically change to the next smaller scale. This change is made when the bottom reaches the top 15 pixels, not when the next depth range is reached. For example, on the 12 foot range, the bottom depth must reach about 24 feet before the depth range will change to 60 feet. You may also manually change the depth scale by pressing the depth set button. Each time this button is decreased the range is decreased by one setting. Note. Should you attempt to change to a depth scale which is less than the actual bottom depth. The computer will automatically change the depth scale back to the proper position. For example, if you are in 40 feet of water and you change the depth scale to 30 feet, the computer will automatically change back to the 60 foot scale. Remember, in the manual mode the automatic range change is not active. The depth scale is always displayed at the right side of the display, with increments at one third add at two-thirds for example, on the 60- foot range, the 20-foot and 40-foot depths will also be indicated. 10. Digital Bottom Reading: The Digital Bottom Reading is displayed in the lower area of the screen. It will operate while the unit is in the automatic mode. The Digital Bottom Reading will not be seen while in the manual mode. Optional Surface Temperature Gauge or Trolling Speed Indicator Your LCR is designed to work with an optional surface temperature gauge, Part Number TG-LCR or an optional Trolling Speed Indicator, Part Number TSI-LCR Figure 17A illustrates the three basic parts of these gauges - the cable interconnection between the electronics and the LCR, the electronic housing, and the probe and cable assembly.
ADDITIONAL INFORMATION The surface temperature gauge is a valuable fishing and boating aid. It will measure water temperature in one-tenth of degrees and display the reading on the LCR screen. The probe and computer controlled electronics have been designed for an accurate indication and an extremely fast response time. The Trolling Speed Indicator will give very accurate low speed readings, in tenths below 10mph, unlike ordinary speedometers. An accurate trolling speed can make the difference in catching fish. The TSI-LCR also gives accurate high speed readings to 75 mph. If you do not have a surface temperature gauge or a trolling speed indicator, see your LCR dealer or call the Humminbird Customer Service Department's number listed in the front of this manual. If you want both the TG-LCR and TSI-LCR an accessory switch is available to allow you to use both and select which one is being displayed on the screen. Simulator Your LCR has a built in simulator. This simulator will display a typical underwater scene which can be used for demonstration or for learning how to use and understand your unit. To activate the simulator, the unit must first be turned off. Next, push in the on/off button for one to two seconds, until you hear the chirping sound. Then release the button and the simulated display will begin. In the simulator mode all buttons can be used. It should be noted, however, that increasing or decreasing the sensitivity setting will not affect the information being displayed. Some additional things you should know about the LCR. Some polarized glasses might affect your view of the LCR display. It could result in a prism or rainbow effect. This condition can possibly be improved by a slight adjustment in tilt. If you get confused while in the manual mode, for instance, if you don't know where the bottom is, then press the auto on/off button to turn on the automatic mode. The LCR will find the bottom by selecting the proper sensitivity level and depth scale. You can then go back to the manual mode it desired In order for your LCR to operate well at high speeds, you must have a properly mounted transducer. Please read the transducer mounting procedure carefully. The transducer for the LCR is a l6 just like most standard Humminbird flasher units. Other transducers, such as 32, cannot be used.

ADDITIONAL INFORMATION CARING FOR YOUR LCR Since your Humninbird LCR is completely waterproof, it can be cleaned with soap and water or hosed off after salt water use with no fear of damage to the unit or its electronics. When cleaning the lens, it is suggested you use a chamois cloth and a nonabrasive cleaner such as Windex. Do not wipe while dirt or other gritty material is on the lens. Care should be exercised to avoid scratching the lens. Keep chemicals such as bug repellent, ammonia or gasoline away from the LCR case and lens. As with any electrical instrument, do not leave your LCR on the dash board or rear window area of the car. The sun can create extremely high temperatures which can damage the case and internal electrical components. During extended periods of nonuse, such as winter, you should store the LCR and other removable depth sounders in the house or garage. This will help prolong the good appearance and operation of these instruments.
LEARNING TO USE YOUR LCR LEARNING TO USE YOUR LCR After installing the unit, transducer, and power cable as instructed, the LCR is ready for use. By following the steps below you will be able to quickly learn how to use the LCR. Also, trouble shooting suggestions are listed in these steps. Note: Perform steps 1 through 7 at idle or slow speed. These steps will insure that your LCR is working properly. Step 1 Turn your LCR on by pushing the On button. The LCR'S computer will automatically adjust the sensitivity and depth scale so that in about one second you will see images appear on the right side of the display and moving to the left. The small gap in the zero line allows you to see movement on the display even when the bottom is not changing. TROUBLE SHOOTING: If nothing happens when the On 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 "On" 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 or the scale might change to a deeper scale This is normal in one or two feet of water. The automatic mode cannot lock onto the bottom in very shallow water. Step 2 Still moving at a slow speed, begin going toward deeper water. You will see that the LCR will display changes as small as 3 inches. Continue to move into deeper water until the bottom return moves off the display. The LCR will automatically change to the next deeper depth scale (indicated at bottom of the display). Notice that the entire screen is changed to the new depth scale. This is the Total Screen Update feature.

LEARNING TO READ THE DISPLAY LEARNING TO READ THE DISPLAY The following illustrations show some typical display with bottom, structure, and target returns. These should help you in interpreting the information being displayed on your LCR.
Surface clutter: The STC in your LCR will normally eliminate surface clutter, however, in some water conditions or when going across the wake of a boat the surface clutter will appear as shown above.
LEARNING TO READ THE DISPLAY
Brush or thick standing timber will appear as a thick mass with holes or gaps as shown above. Notice how the strong fish returns (red dots with black behind) can be easily distinguished.
Thermocline is a temperature change at a certain depth in the water. In some conditions the sonar waves will actually reflect or bounce off this temperature change and therefore it will be displayed on the LCR as shown above. To see the thermocline, you will need to go to the manual mode and increase the sensitivity setting. One of the best ways to learn to use your LCR is to go over familiar locations. If you know what's under the water and can see it displayed on the LCR then youre on your way toward gaining the experience you need.

MAINTENANCE AND WARRANTY

MAINTENANCE MAINTENANCE Your Humminbird fishfinder is designed to provide years of trouble free operation with virtually no maintenance. Follow these simple procedures to ensure your Humminbird 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 climb 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 fishfinder in a closed car or trunk - the extremely high temperatures generated in hot weather can damage the electronics.

TROUBLESHOOTING 5. The unit comes on before I press POWER, and won't turn off. Check the transducer cable. If the outer jacket of the cable has been cut and the cable is in contact with bare metal, you need to repair the cut with electrical tape. If there is no problem with the cable, disconnect the transducer from the unit and see if the problem is corrected, to confirm the source of the problem. 6. I get gaps in the reading at high speeds. Your transducer needs adjusting. If the transducer is transom-mounted, there are two adjustments available to you - height and running angle. Make small adjustments and run the boat at high speeds to determine the effect. It may take several tries to optimize high speed operation. This can also be a result of air or turbulence in the transducer location caused by rivets, ribs, etc. 7. My unit loses power at high speeds. Most Humminbird fishfinders have over-voltage protection that turns the unit off when input voltage 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 displays input voltage in the Diagnostic screen. Use this readout to determine if the voltage exceeds 20 VDC. 8. The screen begins to fadeout. Images are not as sharp as normal. Check the input voltage using Diagnostic. The fishfinder 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 15" (38cm) from the prop.
WARRANTY HUMMINBIRD ONE YEAR FULL WARRANTY First year repairs (from original date of purchase) on your Humminbird fishfinder are absolutely free. This does not include physical damage to the unit or its accessory items. Any modification or attempt to repair the original equipment or accessories by unauthorized individuals will void the warranty. Return the warranty registration card and retain your bill of sale for warranty verification. Accessories not manufactured under the Humminbird trade name are 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 applies to the original purchaser only. This warranty is in lieu of all other warranties expressed or implied and no representatives or persons are authorized to provide for any other liability in connection with the sale of our products. Humminbird reserves the right to perform modifications or improvement on its products without incurring the obligation to install the changes on units previously manufactured, sold, delivered, or serviced. THIS IS A FULL WARRANTY AS DEFINED BY THE FEDERAL WARRANTY ACT EFFECTIVE JULY 4 1975.

Before attempting to install or operate your Humminbird LCR it is recommended that you read the operations manual thoroughly. The LCR has a number of special features not found on any other depth sounder. Therefore, to completely understand all the features we suggest you follow the instructions in this manual. If, after reading the instructions, there is something you do not completely understand about the operation of your unit, we recommend you contact our Customer Service Department-CALL 334-687-0503 Our Customer Service hours are Monday- Friday 8:00 A. M.-5:00 P. M. Please complete your warranty card and return it to us immediately. Thank you.
INTRODUCTION Congratulations on selecting the LCR4x6. Your new Humminbird LCR incorporates the most advanced, innovative concepts in sonar equipment. The LCR is probably the most intelligent depth sounder ever created. Advanced microcomputer technology is used to simplify its operation, not complicate it, so you can quickly learn the basics of operating your unit. You will find even the advanced features, such as Split Screen Zoom and Screen Memory, are easy to learn and fun to use. Your Humminbird LCR has a number of outstanding features including a unique automatic feature. This computer-controlled feature, pioneered by Humminbird, makes using your LCR as simple as pushing the Power button. The computer will automatically adjust the sensitivity, change the depth scale even if the bottom goes off the screen and black out everything below the bottom to make the display easy to read. The LCR4x6 control panel is another Humminbird innovation. You have complete control of all the units features with just seven buttons and an easy-to-understand display of all adjustments is right on the screen. You will quickly see that the advanced technology of the LCR4x6 is easy to use and understand. Other features include Split Screen Zoom and Bottom Lock, Screen Memory, Total Screen Update, large digital bottom depth readout, Fish Alarm, Bottom Alarm, and optional Surface Temperature and Speed Gauges for readings on the LCR screen. The LCR has a large 6-inch by 4-inch visibility LCD, a night-light, waterproof enclosure, and a low profile swivel mount. Read this operations manual thoroughly to get the most from all the LCRs features. Youll have fun learning to use your LCR4x6 and it will give you many hours of fishing and boating pleasure.
THEORY OF OPERATION You Humminbird LCR works on the basic principle of sonar. An electronic signal is generated within the control head of the unit. When coupled to the transducer, this signal is converted to an ultrasonic signal and is transmitted toward the bottom. The speed of the ultrasonic signal travelling through the water is approximately 4800 feet per second. The signal travels through the water until it strikes an object or the bottom. At this instant it is reflected back, picked up by the transducer, reconverted to an electric signal and is recorded on the display of the LCR. The reading at the far right position of the screed shows what is being passed over at that time. As new information is received, the old information is shifted to the left and the new information is added. The information is retained until it disappears from the left side of the screen. Figure 1 illustrates a typical display. One of the unique features of your LCR is the Split Screen Zoom with Total Screen Update. Figure 1 shows a Split Screen Zoom display with the full depth range information on the right and
the expanded view on the left. The Total Screen Update feature is explained in detail later, but basically with the Zoom the Total Screen Update allows you to zoom in on an area even after you have passed by it. The display resolution on the expanded portion of the screen is as good as inch per dot, giving you exact detail while still viewing the full depth range information on the right. The display technology used on the LCR4x6 has been pioneered by Humminbird. The display uses Advanced Super Twist Liquid Crystal Technology for the best contrast, widest viewing angle and extreme high and low temperature operation. The Super Twist Liquid Crystal material in the display is a liquid that can be aligned such that it either blocks light or it lets light pass through. The blocking of light is what makes the black dots on the screen. Since the LCRs display depends on light passing through it to make the images, increasing the light source will make it easier to see. This is why your LCR can be seen so well in direct sunlight. You will also notice that the display can be seen better at certain angles. The LCR mounting has been designed for tilting and pivoting so that you can easily maintain a good angle for viewing. Another characteristic of an LCR display is that you may find that some polarized glasses might affect the view by causing a rainbow prism to appear. This condition can possibly be improved by a slight adjustment in tilt.

SPLIT SCREEN OPERATION The LCR4x6s split screen feature will allow you to make side-by-side comparisons. You will be able to split the screen and compare actual, full depth scale information with three functions-1.) Zoom, 2.) Bottom Lock, or 3.) Screen Memory.
The use of the split screen is very easy. Whenever any of three functions, Zoom, Bottom Lock, or Screen Memory, is turned on the screen automatically splits. LEFT HALF OF SCREEN SHOWS SHOWS EXPANDED VIEW, IN CASE THIS CASE FROM 18 FEET TO 33 FEET RIGHT SIDE OF SCREEN FULL DEPTH RANGE, IN THIS FROM 0 TO 60 FEET
When Zoom is activated, for example as shown in figure 2, the left half of the screen any shows the expanded information while the right half shows the full depth scale information. The Zoom range can be moved up or down to search out any area. Even the depths of the upper and lower part of the Zoom region are digitally displayed for precise location of fish and structure. The bottom lock and screen memory work in the same way to give you the benefit of split screen comparisons. The detailed operation of each of these functions is explained later in this manual. TOTAL SCREEN UPDATE Total Screen Update was invented by Humminbird engineers. You will find this unique feature very useful and beneficial. It will allow you, when changing depth scales, for example, to totally change the entire screen to the new depth scale. It will also allow you to ZOOM in and look at information in much finer detail even after you have already gone over the area.
HOW DOES TOTAL SCREEN UPDATE WORK? Memory devices inside the LCR4x6 can store hundreds of thousands of bits of information Automatically, while you are operating the unit, the computer is putting information into the LCRs memory. All this information is being put into memory in much smaller increments (pieces) than is being displayed on the normal full depth scale. For example, on the 0 to 30 foot range-each dot is equal to 3 inches, or on the 0 to 60 foot range each dot is 6 inches, and so forth. But in the LCR4x6s memory information is being stored such that when you Zoom in on a 71/2 foot increment each dot represents an incredible inch per dot.
HOW TO USE TOTAL SCREEN UPDATE It is very easy to use Total Screen Update because the LCRs computer will do everything automatically. You will notice how Total Screen Update works when a depth range changes. When the bottom display goes off the screen, The LCR4x6 will automatically change to the next deepest range and update the entire screen to the next deepest range and update the entire screen to the new depth range. This Total Screen Update feature also works when changing to shallower scales. For example, suppose you are in the 0 to 120 foot scale but the bottom depth changes quickly to 20 feet. When the depth range is changed to the 0-30 foot scale , the entire screen will look just as if you had gone over the area on the 0-30 foot scale. Another way that you will use Total Screen Update is in operating the LCRs Zoom or Bottom Lock. Since the computer has stored in memory information in very small increments, you will be able to recall this information from memory to get an expanded view of areas which you have already passed over. For example, if you go over some interesting structure or fish, you will be able to Zoom in for a closer look without going back over the area by simply activating the Zoom. The information that is stored in memory will automatically be recalled and displayed on he left side of the screen. The operation of Zoom is explained in a later section.

The high visibility readout of the LCR allows you to see fish, bottom contour and underwater structure. The LCR is designed to operate with a standard 16 degree transducer included with the unit. Other transducers, such as 32 degrees, cannot be used. In order for your LCR to operate well at high speeds, you must have a properly mounted transducer. Please read the transducer mounting procedure carefully.
TRANSDUCER MOUNTING PROCEDURE Humminbirds high speed transducer is supplied with your LCR. This transducer has been designed to give good high speed readings on most all 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 transducer element to be mounted below the bottom of the boat hull keeping the transducer out of turbulent water and insuring good high speed operation. The transducer will absorb the blow of any obstruction by rotating up out of the metal spring bracket without harming the transducer, or your boat. The transducer can be re-engaged by simply rotating the transducer down and snapping it back in place. (See Figure A)
B. Inside Hull Mount- The high speed transducer can be mounted inside the hull (without pivot assembly) using the proper two-part epoxy, such as Humminbirds epoxy kit. Even though there is some loss of signal in shooting through the hull, your LCR will perform well with this type of installation. You cannot shoot through the hull of an aluminum boat. C. Trolling motor Mount- This type of transducer is not supplied with your LCR. It is designed to mount on the foot of a trolling motor. You may exchange your un-used high speed transducer for a trolling motor transducer. Call the Humminbird Customer Service Department. D. Bronz Thru-Hull Mount- This transducer 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 installs through a hole drilled in the boat hull, leaving the housing exposed under the boat. This type of installation must be used for many boats with in-board engines, because there is no suitable location on the transom away from the noise and turbulence created by the prop. A bronz thru-hull transducer should be installed by qualified personnel only. The LCR will operate well at high speeds with a properly mounted transducer. Remember, a transducer will not work transmitting through air or through air bubbles.

TRANSOM MOUNTING PROCEEDURE
Step 1. MOUNTING LOCATION- It is important that the transducer be mounted on the transom where water flow is in constant contact with the transducer. You may wish to observe the rear of the boat while it is moving through the water to determine the best mounting location. Step 2. BRACKET INSTALLATION (Aluminum Boats)- To install the metal bracket on an aluminum boat locate the template on the transom between rows of rivets, or ribs that are on the bottom of the boat. Align the template so that the bottom corner of the template nearest the center of the transom is on the bottom edge of the transom.
Once the location is determined mark and drill three 7/64 dia. holes noted on the template. Attach the metal bracket using three #10 self threading screws supplied. Be sure to align holes 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 prevent leaking. (See Figure C)
Step 2. BRACKET INSTALLATION (Fiberglass Boats)- If your boat has a stepped transom located below and under the main transom, the compact transducer design allows mounting in this area. This mounting location is recommended for good reading at very high speeds. (See Figure D) To install the metal bracket on a fiberglass boat, locate the template on the transom in the same manner as for an aluminum boat. (See Figure C)
NOTE: On boats with more than 15 degree deadrise angle it may be necessary to mount the transducer slightly off parallel with the water level. (See Figure E) Mark and drill the three 9/64 dia. holes as shown on the template. Attach the metal bracket using the three #10 self threading screws supplied. Be sure to align the holes so that they are centered vertically 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 pivot to the transducer main body using the two x5/8 allen head screws, two 3/8 tooth washers and two, square nuts. Make sure the tooth washers are sandwiched between the transducer main body and the pivot. The square nuts are trapped inside the pivot and will not rotate as the allen head screws are tightened. HOWEVER, DO NOT TIGHTEN AT THIS POINT. (See Figure F)

Step 4 TRANSDUCER ASSEMBLY- Insert the transducer assembly into the metal bracket from the bottom. Push up until the holes in the plastic pivot align with the uppermost 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 ANGLE ALLIGHMENT- Set the transducer angle so that it is parallel with the bottom of the boat hull. Once proper alignment is achieved, tighten the two allen head screws using the 5/32 allen
wrench provided. The screws are visible through the access holes on each side of the metal bracket. Check to make sure the transducer main body is rigidly fastened to the pivot. (See Figure H)
Step 6 CHECK POSITION OF TRANSDUCER- At this point, check to see that the bottom of the transducer is a minimum of below the bottom of the transom. (However, as noted in STEP 2, the top of the transducer can not fall below the bottom of the transom ). If it is not, remove the transducer assembly from the metal bracket by removing the pin installed during STEP 3. Loosen the metal bracket mounting screws, re-position the bracket utilizing its slotted holes, tighten and re-assemble. It may be necessary to replace the silicone sealant after this adjustment is made. NOTE: It may be necessary to make several high speed runs to adjust transducer either UP/DOWN or to re-adjust the angle to 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 results with this type installation, it is important that the transducer be mounted by someone familiar with the use of two part epoxy adhesives. For this reason, Techsonic Industries, Inc. will not be responsible for any damage due to the mounting of your transducer in this manner. NOTE: An Epoxy Kit (Part N. EPK) is available from Humminbird. This Epoxy Kit has been formulated for Inside Hull Transducer Installation. 1. Select as flat an area as possible near the aft end and center of boat where the hull is thin and not double. If the bottom has a runner down the center of boat, select an area to one side of the runner, but as close to the runner as possible. Clean the inside of the boat with lacquer thinner in the area transducer is to be mounted. Outside of boat in this area should also be cleaned. ( Not with lacquer thinner ). Put approximately one inch of water in the bottom of the boat. Put transducer in the water. The bottom of the transducer should be in a flat area and should be in good contact with the bottom of the boat. Operate the LCR with the boat operating at high speed. The transducer may have to be moved in order to find an area where satisfactory operation is observed.

2. 3. 4. 5.

When an area is found that produces satisfactory operation, mark the location of the transducer. 7. Remove the water and transducer and clean the marked area and the bottom of the transducer thoroughly. 8. Using the Humminbird Epoxy Kit or equivalent, mix an ample amount of epoxy without causing it to bubble and pour it in the area the transducer is to be mounted. The puddle should be larger than the bottom of the transducer. 9. Coat the bottom of the transducer with epoxy, then put it in the center of the puddle and push down on the transducer while moving it around in a circular motion. This forces out any air bubbles that may be trapped between the bottom of the transducer and the hull of the boat. 10. Let epoxy cure then the transducer is ready to operate. No water is now required in the bottom of the boat and gas and oil that is spilled inside of the boat will not degrade performance as it will if the transducer is placed only in water. CAUTION: Do not use the silicone seal or any soft adhesive to bond the transducer to the hull. This will reduce the sensitivity of the unit.
4. TROLLING MOTOR MOUNTING PROCEDURE A Trolling Motor Transducer is designed to be mounted on the foot of the trolling motor with the aid of an adjustable clamp, included standard. Your trolling motor transducer will give excellent reading with no interference from the electric motor. Some boat manufacturers are now glassing in a second transducer beneath the front deck for thru the hull reading of the forward mounted depth sounder. This installation also serves a dual purpose in that a fisherman can run his big motor at idle speed and use his front depth sounder to scan for submerged stumps or obstacles. Such a practice can often prevent damage to props and lower units of the big outboard.
CAUTIONS 1. Occasionally the eye of your transducer may become dirty 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 may be cleaned with liquid detergent. 2. Improper installation of the transducer can alter the efficiency and accuracy of the entire system. 3. If your boat of transducer is out of the water for a period of time, it may take a short period of time for the transducer to become thoroughly wetted when returned to the water. Also, reentry may cause turbulence which will create air bubbles in the eye of the transducer. The bubbles will disappear in a short time or can be removed by rubbing the transducer eye with your fingers while the transducer is in the water. 4. If your instrument should fail to function, be sure to check all the electrical connections before removing the transducer or calling a serviceman.
Inspect your transducer cable and make sure that it has not been cut or damaged to the point where it will affect the performance of the transducer. A slight nick or cut, exposing the outer cable, can be repaired by wrapping with electrical tape. A transducer can be damaged if the inner cable and outer cable are allowed to make contact. Such a problem can sometimes be corrected by properly splicing the coaxial cable. This should only be attempted by a qualified service technician. If your LCR is not working properly and you suspect the problem might be in your transducer, we would recommend you borrow a unit from a friend and try it on your boat. If the symptoms are the same, you can almost be certain that the problem is in the transducer.

INSTALLING THE LCR The LCR should be mounted on a flat, solid surface for maximum stability. The low profile swivel mount has four holes drilled in the base. It is recommended that all four holes be used. Position the swivel base and drill four diameter holes. Note: The LCR hole pattern Is the same as for all Humminbird flasher units. Use hardware provided 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 washers provided are placed between the unit and the gimbal bracket Important: Note which side of the gimbal faces forward. (Slots on gimbal bracket go towards rear). Also, rubber washer must be located between the unit and the gimbal bracket. Install the mounting knobs and tighten snugly. The unit can now be swiveled and tilted to any desired position.
OTHER MOUNTING OPTIONS 1. 2. The LCR gimbal bracket can also be mounted on the SM-4, quick disconnect swivel mount. The LCR gimbal bracket can also be mounted directly to the dash without the swivel mount, however, this method is not recommended since the unit cannot be rotated.
INSTALLING THE CABLES Your LCR comes equipped with Humminbirds new Angle-Lock power and transducer connectors. The power connector is identified with the letter P on the back of the plug.
It plugs into the outlet on the back of the unit marked Power. The transducer connector is identified with the letter T and plugs into the outlet on the back of the unit marked Transducer. Note: An adapter (AD-4) is available to allow use of an old waterproof (BNC) transducer with the LCR, but be sure that the transducer is a 16degree. A 32 degree transducer cannot be used. A 11/8 hole must be drilled to pull through the transducer connector. After drilling the hole, pull the transducer connector up through the hole. If you are installing two units, both transducer connectors can be pulled through this 1 1/8 inch hole. Next, push the power cable wires down through the hole. A hole cover has been provided which will dress and hold the wires. Install the hole cover after determining the necessary wire length from the hole. The power cable has a red lead to the positive (+) post and the black lead to the negative (-) post. 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 separately from any other accessory. Your Angle-Lock connectors can only be plugged in one way. Position the connector so the letter P or T can be read and the 90 degree bend is pointed downward. Push the connector in as far as it will go. Turn the positive locking ring as far as it will go clockwise until you feel it lock. locking ring as far as it will go clockwise until you feel it lock. Your connector is now locked into place. Note: For easy access to the connectors, simply loosen the mounting knobs and tilt your LCR forward. The connectors are now in full view and easy to plug or unplug.

TESTING YOUR UNIT AND TRANSDUCER INSTALLATION After installing the unit, transducer, and cables, you are ready to test the installation. You should put your boat in t he water to test the unit because the transducer cannot transmit and receive properly through air.
INITIAL UNIT TESTING With your boat in the water at idle or at a very slow speed, turn your LCR on by pushing the Power button. The LCRs computer will automatically adjust the sensitivity and depth range so
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.

E. In the Manual Mode it is possible to have the sensitivity set too high such that reflection from suspended matter or air bubbles will begin to black out the display.

DEPTH RANGE

THINGS TO KNOW ABOUT DEPTH RANGE A. In the automatic mode the proper depth range is found as soon as the unit is turned on. B. As you move into deeper water and the bottom goes off the screen, the next deeper depth range will automatically be activated. Also, as water becomes shallower reaching the top one third of the screen the depth range will automatically change to the next shallower scale. C. As the depth range changes, the scales to the right of the display will also change indicating the maximum depth of that range and also intermediate depths at one-third and two-thirds of the full scale. D. The LVR4x6 has six depth ranges: 0-15 feet, 0-30 feet, 0-69 feet, 0-120 feet, 0-180 feet, and 0-240 feet. You may manually change the depth range by pressing the , or buttons. E. In the Automatic Mode, if you attempt to change to a depth range which is less than the actual bottom depth, the computer will automatically change the depth range back to the proper position. For example, if you are in 40 feet of water and you change the depth range to 30 feet, the computer will automatically change back to the 60 foot range. F. The button, while on the depth range menu, will turn the Automatic Mode on and off. It has the same function as the button used on the sensitivity menu. G. In the Manual Mode the automatic range change is not active. This means you must manually set the depth range by pressing the or buttons.

BOTTOM ALARM

THINGS TO KNOW ABOUT BOTTOM ALARM A. The alarm setting is shown digitally (in numbers) on the menu and graphically ( by the vertical bar ) on the right side of the display. It is set at 5 feet when the unit is first turned on. B. When the bottom alarm is turned off it is indicated on the menu and the vertical bar disappears on the right side of the display. C. Pressing the or button once will change the setting by one division. Holding either button down will cause the setting to change rapidly. You will notice that the increments of change will vary depending on the depth range. For example, on the 0 to 15 foot range the setting will change about 3 inches each time the or button is pressed while on the o to 240 foot range increment is 4 feet. D. The alarm setting may be set from 1 foot to 240 feet. E. In the Automatic Mode the Bottom Alarm will sound a continuous Alarm when the bottom is equal to or less than the setting. Fish will not trigger the bottom alarm. F. In the Manual Mode wither the bottom or fish can trigger the alarm. If the bottom depth becomes equal to or less than the alarm setting, a continuous Alarm will sound. If a fish enters the Alarm range, a short quick Alarm will sound. G. If the Bottom Alarm is turned off and then back on again before the unit is turned off, it will be set at the previous setting.

FISH ALARM

THINGS TO KNOW ABOUT FISH ALARM A. The Fish Alarm will give a short alarm sound when a return is detected between the boat and 3 inches from the bottom. It will not alarm on the bottom. B. When the Fish Alarm is on it is indicated on the menu and also on the right side of the display by the word FISH. C. The Fish Alarm is operational only while the LCR is in the Automatic Mode. See paragraph F under Bottom Alarm for use of the alarm in the Manual Mode. D. The Fish Alarm may occasionally sound when no target is displayed. This can happen when a target is detected close to the bottom but is too close to be seen on the display because of the range selected. It can also happen when the display sweep speed is slow. Such that the target was detected but is gone by the time the display is updated.
THINGS TO KNOW ABOUT ZOOM A. When Zoom is turned on, the screen will automatically split showing the full depth scale information on the right and the expanded view corresponding to the portion of the Zoom Cursor on the left (see Figure 2). B. When Zoom is turned on, it is indicated on the menu and at the lower middle part of the display. C. Pressing the or button once will move the Zoom Cursor one divi sion. Holding the button down will cause the Cursor to move continuously. D. The size of t e Zoom Range is automatically selected, depending on the depth range, as shown below with the display resolution for each range: Depth Dot Range Equals 0-15, 0-30 Inch 0-60, 0-120 Inches 0-180, 0-240 Inches Zoom Range Size 7.5 Feet 15 Feet 30 Feet 11/Each
E. The exact depth of the top and bottom of the Zoom Range is displayed in the upper and lower left corners of the screen. As the Zoom Cursor is moved up and down these numbers will change to indicate the exact setting of the Zoom Range. These depth indicators will be very useful in pinpointing the exact depth of fish or structure.
F. Zoom may be activated at any time. While learning to use Zoom it may be easier to press the button to freeze the display after positioning the Zoom Cursor. This will give you time to study the display. NOTE: If the display is stopped, the screen will not update (change) until the button is pressed again. G. Remember that because of the LCRs Total Screen Update, even while you are using Zoom, no information is being lost. You can turn Zoom off, go to any depth range and see all the information just as if you had been on that depth range all along.
THINGS TO KNOW ABOUT BOTTOM LOCK A. When Bottom Lock is turned on, the screen will automatically split showing the full depth scale information on the right and the expanded view from the bottom looking up on the left (See Figure 23).

BUILT-IN SIMULATOR Your LCD4x6 has a built-in simulator. This simulator will display a typical underwater scene which can be used for demonstration or for learning how to use and understand your unit. To activate the simulator, the unit must first be turned off. Next, push in the button for one to two seconds, until you hear the chirping sound. Then release the button and the simulated display will begin. In the simulation mode all buttons and features can be used. It should be noted, however, that increasing or decreasing the sensitivity setting will not affect the information being displayed.
CARING FOR YOUR LCR: Since your Humminbird LCR is completely waterproof, it can be cleaned with soap and water or hosed off after salt water use with no fear of damage to the unit or its electronics. When cleaning the lens, it is suggested you use a chamois cloth and a non-abrasive cleaner such as Windex Do not wipe while dirt or other gritty material is on the lens. Care should be exercised to avoid scratching the lens. Keep chemicals such as bug repellant, ammonia or gasoline away from the LCR case and lens. As with any electrical instrument, do not leave your LCR on the dash board or rear window area of the car. The sun can create extremely high temperatures which can damage the case and internal electrical components. During extended periods of non-use, such as Winter, you should store the LCR and other removable depth sounders in the house or garage. This will help prolong the good appearance and operation of these instruments.
LEARNING TO READ THE DISPLAY The following illustrations show some typical displays with bottom, structure, and fish returns. These should help you in interpreting the information being displayed on your LCR4x6.
Brush and standing timber will appear as shown in the display above. The speed of the boat and display sweep speed will have a large effect on the way this information is displayed. For example, at a slow boat speed and a fast sweep speed the standing timber will appear wider. At a fast boat speed and a slow sweep speed some of the information will be missed.
With Bottom Lock the wreck and the fish are clearly displayed on the left side of the screen which shows an expanded view 20 feet up from the bottom (screen is from 142 feet to 172 feet).
Thermocline is a temperature change at a certain depth in the water. In some conditions the sonar waves will actually reflect or bounce off this temperature change and therefore it will be displayed on the LCR as shown above. Normally a high sensitivity setting is required to show the thermocline; therefore, if you want to see the thermocline go to the Manual Mode and increase the sensitivity level.

OPTIONAL TEMPERATURE AND SPEED GAUGES Your LCR is designed to work well with an optional surface temperature gauge. Part Number TG-LCR, or an optional Trolling Speed Indicator, Part Number TSI-LCR. Fig. 26 illustrates the three basic parts of these gauges-the cable interconnection between the electronics and the LCR, the electronic housing, and the probe cable assembly.
The surface temperature gauge is a valuable fishing and boating aid. It will measure water temperature in one-tenth of degrees and display the reading on the LCR screen. The probe and computer controlled electronics have been designed for an accurate indication and an extremely fast response time. The Trolling Speed Indicator will give very accurate low speed readings, in tenths below 10 mph., unlike ordinary speedometers. An accurate trolling speed can make the difference in catching fish. The TSI-LCR also gives accurate high speed readings to 75 mph. If you do not have a surface temperature gauge of a trolling speed indicator, see your LCR dealer or call the Humminbird Customer Service Departments Toll Free number Listed in the front of this manual. If you want both the TG-LCR and TSI-LCR an accessory switch is available to allow you to use both and select which one is being displayed on the screen.
SHOULD YOU NEED SERVICE If, after reading the troubleshooting guide, you determine your Humminbird needs factory service, please attach the following information to the unit and send it to the address below.

(Please Print)

Street Address

Unit Purchase Date

Home Telephone

Work Telephone

Please describe briefly the problem:
Techsonic Industries, Inc. Service Department Three Humminbird Lane Eufaula, AL 36027
The best products in the industry are backed by the best service policy in the industry. Even though youll probably never need to take advantage of our incredible service guarantee, its good to knnow that we back our units this well. We do it because you deserve the best. One-Year Full Warranty First year repairs on your unit will be made absolutely FREE (physical damage not included) Limited Maximum Service Charge After the warranty period,, a limited maximum service charge is the most you will pay for each repair (physical damage and missing parts not included).
Factory- Trained Technicians All repair work is performed by factory- trained technicians to meet exacting factory specifications.
Strictest Factory Testing Factory- serviced units go through the same rigorous quality- control inspections and full burn- in as new units.