Here's some sample wiring diagrams:

TS-12 BK

Two Temperature Sensors (Water and T-2)

POWER CABLE

TS-3 BK
Three Temperature Sensors (Water, T-2, and T-3)

ST-TBK

TS-2 BK
Three Temperature Sensors plus Speed (Water, T-2, T-3, and Speed)

LOWRANCE

192 kHz TRANSDUCER
TO SAM-50HPD (NOT INCLUDED)
CONNECTORS The diagram above shows the three connectors on the back of the sonar unit. Looking at the back of the unit, the 192 kHz transducer connector is at the far left. Plug the 192 kHz transducer in here. The center connector is for the power cable. The connector at the far right is for a serial cable that is included with the SAM-50HPD. This is the cable that allows the SAM to communicate with the sonar unit. See the SAM-50HPD's installation manual for more information.

Transducer Installation

Some of the models covered by this manual have a transom-mount transducer included. There two different transducers that could be packed with your unit. One is a 20 cone angle "Skimmer" transducer that can be mounted on the transom or epoxied inside certain boats to "shoot-thru" the hull. The other transducer is an 8 cone angle "Skimmer" transducer that is transom-mounted only. The 8 transducer has a kick-up mounting bracket helps prevent damage if the transducer strikes an object while the boat is moving. If the transducer does kick-up, the bracket can easily be pushed back in place without tools. Read this manual carefully before attempting the installation. Determine which of the mounting positions is right for your boat. Use extreme care if mounting the transducer inside the hull, since once it is epoxied into position, the transducer usually cannot be removed. Remember, the transducer location is the most critical part of a sonar installation.
Location - General - All Transducers
1. The transducer must be placed in a location that has a smooth flow of water at all times. If the transducer is to be mounted inside the hull, then the chosen location must be in the water at all times. If the transducer is not placed in a smooth flow of water, interference will show on the sonars display in the form of random lines or dots whenever the boat is moving. 2. The transducer should be installed with its face pointing straight down, if possible. 3. If the transducer is mounted on the transom, make certain it doesnt interfere with the trailer or hauling of the boat. Also, dont mount it closer than approximately one foot from the engines lower unit. This will prevent cavitation interference with the propeller. Typically, the transducer should be mounted as deep in the water as possible. This increases the chance that it will be in the water in high speed and reduces the possiblity of air bubble interference. 4. If possible, route the transducer cable away from other wiring on the boat. Electrical noise from engine wiring, bilge pumps, and areators can be displayed on the sonars screen. Use caution when routing the transducer cable around these wires.

RATCHETS

3. Once you determine the correct position for the ratchets, assemble the transducer as shown at left. Don't tighten the lock nut at this time.

NUT METAL WASHER

RUBBER WASHERS BOLT

METAL WASHER

CAUTION! CLAMP THE TRANSDUCER CABLE TO TRANSOM NEAR THE TRANSDUCER. THIS WILL HELP PREVENT THE TRANSDUCER FROM ENTERING THE BOAT IF IT IS KNOCKED OFF AT HIGH SPEED.

GOOD LOCATION

POOR LOCATION

POOR ANGLE GOOD LOCATION

4. Hold the transducer and bracket assembly against the transom. The transducer should be roughly parallel to the ground. The bottom of the transducer bracket should be in line with the bottom of the hull. Don't let the bracket extend below the hull! Mark the center of the slots for the mounting holes. Drill two 5/32" holes in the marked locations for the #10 screws supplied with the transducer.

TRANSOM

SIDE VIEW
5. Remove the transducer from the bracket and re-assemble it with the cable passing through the bracket over the bolt as shown above. Attach the transducer to the transom. Slide the transducer up or down until its aligned properly on the transom as shown above. Tighten the brackets mounting screws. Adjust the transducer so that its parallel to the ground and tighten the lock nut until it touches the flat washer, then add 1/4 turn. Dont over tighten the lock nut! If you do, the transducer wont kick-up if it strikes an object in the water. 6. Route the transducer cable to the sonar unit. Make certain to leave some slack inthe cable at the transducer as shown above. If possible, route the transducer cable away from other wiring on the boat. Electrical noise from the engines wiring, bilge pumps, VHF radio wires and cables, and aerators can be picked up by the sonar. Use caution when routing the transducer cable around these wires. IMPORTANT! Clamp the transducer cable to the transom close to the transducer. This can prevent the transducer from entering the boat if it is knocked off at high speed. 7. Make a test run to determine the results. If the bottom is lost at high speed, or if noise appears on the display, try sliding the transducer bracket down. This puts the transducer deeper into the water, hopefully below the turbulence causing the noise. Don't allow the transducer bracket to go below the bottom of the hull!

A-C +42.0 +27.0 +12.0 -3.0
A-D +37.0 +22.0 +6.0 -9.0
A-E +30.0 +15.0 0.0 -15.0
16 DEGREE TRANSOM ANGLE INDEX MARKS A-A +41.0 ANGLE OF ATTACK +26.0 IN DEGREES +10.0 (REF. BOTTOM OF HULL) -5.0

14 DEGREE TRANSOM ANGLE

A-B +35.0 +20.0 +5.0 -10.0
A-C +44.0 +29.0 +14.0 -1.0
A-D +39.0 +24.0 +8.0 -7.0
A-E +32.0 +17.0 +2.0 -13.0
For example, with a 14 degree transom, placing the ratchet on the transducer bracket on "A" and the ratchet on the transducer on "C" will result in a +42.0 to -3.0 degree coarse angle adjustment range.

-3.0o +42.0o

ANGLE OF ATTACK
LOCK WASHER BOLT NUT FLAT WASHER

FLAT WASHER

2. Once you've determined the proper ratchet placement, assemble the transducer and bracket as shown above. Don't tighten the nut at this time. INSTALLATION - Location 1. The transducer must be placed in a location that has a smooth flow of water at all times. Air bubbles created by the movement of the boat hull against the water interfere with the sonar signal. This causes noise or random marks to appear on the sonars display. You may need to carefully view the waters path at the transom while the boat is moving to determine the best location for the transducer. 2. Make certain the chosen location doesnt interfere with the boats trailer. Mount the transducer at least one foot from the engines lower unit. This will prevent air bubbles from the transducer interfering with the propeller.
POOR LOCATION GOOD LOCATION POOR ANGLE
3. Dont mount the transducer directly behind strakes or ribs on the bottom of the hull. Typically, a good location on aluminum boats is between the ribs closest to the engine. 4. Once you determine the best location for the transducer, hold the bracket against the transom. The transducer should be roughly parallel to the ground. The bottom of the hull should be about halfway between the centerline of the transducer and its bottom. (See the illustration below.)
Mark the transom in the center of each slot in the transducer bracket. Now drill one hole in the center of each slot. Use #12 stainless steel screws (not included) to loosely attach the brackets to the transom. 5. Adjust the transducer and bracket so that the front of the transducer is slightly lower than the back. See the section on fish arches in this manual for proper transducer angles. Tighten all screws. Clamp the transducer cable to the transom close to the transducer. This will prevent the transducer from entering the boat should it be knocked off at high speed.
6. Route the transducer cable to the sonar unit. Keep the transducer cable away from other wiring on the boat, if possible. Electrical noise from engine wiring or bilge pumps can be picked up on the transducer cable. This can show up as unwanted interference on the sonar display.

When the single frequency mode is enabled, as shown at right, adjusting sensitivity or grayline is straightforward. Simply press the MENU key, then press the up or down arrow keys until the desired menu appears, then make the adjustment using the left or right arrow keys.
However, you can adjust some features separately when you're using both 50 and 192 kHz. For example, the sensitivity menu shown at right lets you select either the 192 or 50 kHz chart by pressing the appropriate arrow key. To adjust the 192 kHz sensitivity, press the left arrow key. The screen shown below appears.
This is the 192 kHz sensitivity menu. Press the left or right arrow keys to adjust it, then press the EXIT key to erase the menu. See page 27 for more information on sensitivity adjustment.
MODES This unit has five different modes: FASTRAK, digital/chart, split-chart, full chart, and window groups. Each of these modes also has multiple options. To select a different mode, first press the MODE key. A screen similar to the one at right appears. Press the up or down arrow key to select the desired mode, then press the left or right arrow key to select an option from that mode, if necessary. Press the EXIT key to erase the menu. FASTRAK This feature converts all echoes to short horizontal lines on the displays far right side. The graph continues to operate normally. FASTRAK gives you a rapid update of conditions directly under the boat. This makes it useful for ice fishing, or when youre fishing at anchor. Since the unit is not moving, fish signals are long, drawn out lines on a normal chart display. FASTRAK converts the graph to a vertical bar graph that, with practice, makes a useful addition to fishing at a stationary location. Full Chart This is the default mode used when the unit is first turned on. The bottom signal scrolls across the screen from right to left. Depth scales on the right side of the screen makes it easy to determine the depth of fish, structure, and other objects. The line at the top of the screen represents the surface. The bottom depth shows at the top left corner of the screen. "192" next to the digital depth shows the frequency of the digital sonar. In this case, it's operating at 192 kHz. The word "AUTO" at the screen's top center shows that the sonar is in the automatic mode, freeing you from sensitivity, range, and noise rejection adjustments.The "192 KHZ" at the bottom of the screen shows that this chart is operating at 192 kHz. You can switch the full chart between 192 and 50 kHz.

Reset Window Groups To return all groups to the factory settings, use the "Preset Options" on the "System Setup" menu. To return only one group to its factory setting, select "reprogram groups" from the "System Setup" menu. The screen shown below right appears.
Press the left or right arrow key until the desired window group that you want to reset appears. When it appears, simply press the down arrow key and the unit will reset only that group. Press the EXIT key to erase the menu.
AUTOMATIC When the sonar unit is first turned on, the Automatic feature is enabled. This is indicated by the word AUTO at the top of the screen. The Automatic feature adjusts the sensitivity and range so the bottom signal is displayed in the lower half of the screen at all times. To turn Automatic off, first press the MENU key, then press the up or down arrow keys until the "AUTO" menu appears. Press the left arrow key to switch to the manual mode. The letters Man appear at the top of the screen, indicating the unit is in the manual mode. To turn Automatic on, repeat the above steps to get the auto menu, then press the right arrow key.
SENSITIVITY The sensitivity controls the ability of the unit to pick up echoes. A low sensitivity level excludes much of the bottom information, fish signals, and other target information. High sensitivity levels enables you to see this detail, but it can also clutter the screen with many undesired signals. Typically, the best sensitivity level shows a good solid bottom signal with Grayline and some surface clutter. When the it's in the Automatic mode, the sensitivity is automatically adjusted to keep a solid bottom signal displayed, plus a little more. This gives it the capability to show fish and other detail. However, situations occur where it becomes necessary to increase or decrease the sensitivity. This typically happens when you wish to see more detail, so an increase in sensitivity is indicated. The procedure to adjust it is the same whether the unit is in the automatic or manual mode. To adjust the sensitivity, press the MENU key, then press the up or down arrow keys until the "SENS" menu appears as shown above. The sensitivity menu has left and right arrows, plus a horizontal bar graph. The graph gives a visual indication of the sensitivity level. The number to the right of the bar graph shows the percentage of sensitivity in use. To increase the sensitivity level, press the right arrow key. As you press the key, the menus bar graph will grow wider and the percentage will increase in value. You can also see the difference on the chart record as it scrolls. When the sensitivity is at the desired level, release the key. To decrease the sensitivity level, press the left arrow key. The bar graph and percentage will decrease. When the sensitivity is at the desired level, release the key. When you reach either the maximum or minimum limit, a tone sounds. To erase the menu, press the EXIT key.

RANGE - Automatic When turned on for the first time, the unit automatically places the bottom signal in the lower half of the screen. This is called Auto Ranging and is part of the automatic function. Typically, the range cannot be changed manually while the unit is in automatic, as shown at right. However, depending upon the bottom depth and the current range, you can change the range to a different depth. In the example screen shown below, the bottom depth has descended to a point where you can change the range to 150 feet. To do this, simply press the right arrow key while the Auto Range menu is displayed. When you're finished with this menu, press the EXIT key to erase it.
RANGE - Manual You have complete control over the range when the sonar is in the manual mode. To change the range, first make certain the unit is in the manual mode. Next, press the MENU key and the up or down arrow keys until the range menu appears as shown at right. Press the left or right arrow keys to decrease or increase the range. The available ranges are 0-5, 10, 20, 30, 40, 60, 100, 150, 200, 300, 500, 800, and 1000 feet. After the desired range is displayed, press the EXIT key to erase the range menu. NOTE: The depth capability depends on the frequency selection, transducer installation, water and bottom conditions, and other factors.
UPPER AND LOWER LIMITS You can enter any range when the unit is in the manual mode. The unit lets you enter any upper and lower limit, provided there is at least five feet separating them, for example, from 20 to 25 feet. (On the screen below left, the upper limit is 0 and the lower limit is 60.) Using the upper and lower limit range option, we changed the range from 0 to 60 feet to 24 to 54 feet. This "zoomed" the display to a 30 foot range.
As you can see, the fish arches near the bottom are much larger and easier to see. In fact, a possible fish on the bottom shows on the enlarged screen that is not even visible on the left! Not only does this make it easier to see targets, but you can more accurately determine their depth, due to the expanded depth range. To change the upper and lower limits, first press the MENU key. Next, make certain the unit is in the manual mode, then press the up or down arrow keys until the "Set Chart Limits" menu appears as shown below.
Now press the left arrow key to change the upper limit or the right arrow key to change the lower limit. After pressing the key, a screen similar to the one at the top of the next page appears.
In this example, we're setting the upper limit. Use the up and down arrow keys to select the number, the right and left arrow keys to move to the next number. When the limit shows the desired depth, press the ENT key. The screen shown below appears.

When the unit is first turned on, FishTrack is off. To turn the FishTrack feature on, press the menu key, then press the up or down arrow keys until the FISH ID menu appears. Now press the right arrow key. Pressing it once switches the Fish ID feature on, but leaves FishTrack off. To turn FishTrack on, press the right arrow key again, which highlights the "TRACK" label on the Fish ID menu. CHART SETUP You can customize the chart screen. To do this, press the MENU key, then press the up or down arrow keys until the "CHART SETUP" menu appears. Now press the right arrow key. The screen shown at right appears. The digital depth display at the top left corner of the screen normally shows in large numbers. You can change this to smaller numbers or turn it off completely using the "Show Digital" menu at the top of this screen. You can also turn the temperature, speedometer, distance log, zoom bar, zone alarm bar, and cursor on or off using this menu. See below for more information on these items.
CHART CURSOR This sonar unit has a chart cursor that allows you to pinpoint a targets depth. The cursor is simply a horizontal line that extends across the display from left to right. A depth box at the end of the line on the right side shows the lines depth. In the example at right, the cursor (line) is at 29.8 feet. To display the chart cursor, highlight the "Show Cursor" on the "Chart Setup" menu, then press the right arrow key. A screen similar to the one at right appears. Use the up and down arrow keys to move the cursor up or down to the desired depth.
To turn the chart cursor off, repeat the above steps. The unit returns to the sonar screen without the chart cursor. DISPLAY ZOOM BAR When the unit is in the split-screen zoom mode, the zoom bar doesnt normally show on the screen. The zoom bar shows the section of water on the right side of the screen that is being enlarged on the left side. To turn the zoom bar on continuously when the split-screen mode is on, highlight the "Show Zoom Bar" on the "Chart Setup" menu, then press the right arrow key. Now press the EXIT key. If you're not in the split-screen mode, change to that mode. A screen similar to the one at right appears. To turn the zoom bar off, repeat the above steps. DISPLAY ZONE BAR The zone alarm consists of a bar. Any echoes that appear between the top and bottom of this bar triggers the zone alarm. This bar normally doesn't show on the screen. To turn the zone bar on continuously, highlight the "Show Zone Bar" on the "Chart Setup" menu, then press the right arrow key. Now press the EXIT key. A screen similar to the one at right appears. To turn the zone bar off, repeat the above steps. See the Alarms section for more information on the zone alarm. DIGITAL SONAR When the unit is first turned on, the digital depth display is located at the top left corner of the screen. This display comes from a separate digital sonar built into the unit (and into the optional SAM-50HPD). It displays only the bottom depth. If it loses the bottom, the last known depth will flash on the display. When the digital regains the bottom, it automatically shows the bottom depth again.

ZONE ALARM The zone alarm is triggered when any echo passes inside the zone alarm bar, shown on the right side of the screen. To turn the zone alarm on, highlight the "Zone Alarm" label on the alarms menu, then press the right arrow key. To adjust the zone alarm, highlight the "Zone Adjust" label, then press the right arrow key. A screen similar to the one at right appears. To adjust the top of the zone bar higher or lower, press the up or down arrow keys while the up and down arrows are surrounding the "Upper Zone" on the screen as shown above. To adjust the bottom of the zone bar, first press the right arrow key to move the arrows to the "Lower Zone" on the screen, then use the up or down arrow keys. When the zone alarm is set, press the EXIT key to erase the menus. FISH ALARM Use the fish alarm for a distinctive audible alarm when fish or other suspended objects are detected by the Fish I.D. feature. A different tone sounds for each fish symbol size shown on the display. To turn the fish alarm on, press the ALARM key, then highlight the "Fish Alarm" label and press the right arrow key. The unit will revert to the sonar display with the fish alarm turned on. Repeat the above steps to turn the fish alarm off. Note: If the unit is in the manual mode, turning the Fish Alarm on will also turn the automatic mode and Fish ID on, also. ADJUST CHART SURFACE CLARITY (SCC) The markings extending downward from the zero line on the chart are called surface clutter. These markings are caused by wave action, boat wakes, temperature inversion, and other natural causes. The Surface Clarity Control (SCC) reduces or eliminates surface clutter signals from the display. SCC varies the
sensitivity of the receiver, decreasing it near the surface and gradually increasing it as the depth increases. The maximum depth that SCC will affect is 75% of the selected depth range. For example, on a 0-60 foot range with maximum SCC, surface clutter will be reduced down to 45 feet. There are three levels of SCC available: low, medium, and high. When its turned on for the first time, the SCC level is low. To change it, press the MENU key, then press the up or down arrow keys until the "Surface Clarity" menu appears. Now use the left or right arrow keys to change it. When you're finished, press the EXIT key to erase the SCC menu.
ASP (Advanced Signal Processing) The ASP feature is a noise rejection system built into the sonar unit that constantly evaluates the effects of boat speed, water conditions, and interference. This automatic feature gives you the best display possible under most conditions. The ASP feature is an effective tool in combating noise. In sonar terms, noise is any undesired signal. It is caused by electrical and mechanical sources such as bilge pumps, engine ignition systems and wiring, air bubbles passing over the face of the transducer, even vibration from the engine. In all cases, noise can produce unwanted marks on the display. The ASP feature has two levels - Normal and High. If you have high noise levels, try using the High ASP setting. However, if you are having trouble with noise, we suggest that you take steps to find the interference source and fix it, rather than continually using the unit with the high ASP setting. However, there are times when you may want to turn the ASP feature off. This allows you to view all incoming echoes before they are processed by the ASP feature. To change the ASP level, press the MENU key then press the up or down arrow keys until the "ASP" menu appears. Now use the left or right arrow keys to change it. When you're finished, press the EXIT key to erase the ASP menu.

SYSTEM SETUP The following features are available through the "System Setup" menu. To access this menu, press the MENU key, then press the up or down arrow keys until the "System Setup" menu appears. Press the right arrow key. The screen shown at right appears. Audio/Display You can adjust the display's contrast, turn the speaker off or on, and adjust the light intensity using this menu. To do this, highlight the "Audio/Display" label on the system setup menu, then press the right arrow key. The screen at right appears. To adjust the contrast, highlight the "Contrast" menu, then use the left or right arrow key to change it. Look at the pattern at the bottom of this screen to adjust the contrast for the best sharpness. To turn the speaker off, highlight the "Speaker" label, then press the left arrow key to turn it off. To adjust the backlight, highlight the "Backlight" label, then use the left and right arrow keys to change the light's intensity. System Information This screen shows some basic data about the sonar unit. To view this, highlight the "System Info" label on the System Setup menu, then press the right arrow key. The system info screen appears. To erase this screen, press the EXIT key. The unit returns to the System Setup menu. Units of Measure The sonar normally shows the depth in feet, speed in statute miles per hour, distance in statute miles, and temperature in degrees Fahrenheit. You can change any of these settings using the units of measure menu. To do this, highlight the "Units of Measure" label on the System Setup menu, then press the right arrow key. The screen at the top of the next page appears. Highlight the item you want to change, then press the right or left arrow key to change it. To erase this screen, press the EXIT key.
Temperature Graph Some of the screens have a temperature graph, as shown at right. Normally, the temperature graph has a 2 range. On the screen shown at right, the temperature graph has a range from 71 to 73. You can change this range to 4 or 10 using the "Temp Graph Scale" label on the Units of Measure menu. Highlight that label, then press the right arrow key until the desired temperature graph range is highlighted. Press the EXIT key to erase the menu. Reset Distance Log If you have a speed sensor attached, the unit starts counting the distance you've travelled each time you turn it on. You can reset this distance to zero by turning the unit off and on again, however, it's easier to highlight the "Reset Distance Log" label on the System Setup menu, then press the right arrow key. This resets the log and keeps you in the System Setup menu. To erase this menu, press the EXIT key. Preset Options The unit "remembers" all settings such as units of measure, auto/manual, sensitivity, even when power is removed from the unit. To return the unit to the factory settings, highlight the "Preset Options" label on the "System Setup" menu, then press the right arrow key. It returns to the full chart screen with all settings returned to their factory values.

Keel Offset The sonar measures water depth from the face of the transducer. Since the transducer is below the surface of the water, this distance is not the exact water depth. If the transducer is one foot below the surface, and the sonar reports the water depth as 30 feet, then the depth is actually 31 feet. You can calibrate the depth reading using the keel offset feature. First, highlight the "Keel Offset" label on the "System Setup" menu, then press the right arrow key. The screen shown at right appears. The current bottom depth shows in the upper left corner of the screen. The keel offset shows in the upper right corner. In this example, we need to change the keel offset so that the sonar will add one foot to the depth, since the transducer is one foot below the surface.
Press the right arrow key, then the up or down arrow keys until 1.0 appears in the "Adj Keel" box, as shown at right, then press the ENT key. This immediately changes the digital depth display at the top of the screen by one foot. Press the EXIT key to erase this menu. Note: Another way to use the keel offset feature is if you want to know the depth of the water below the lowest part of the boat, instead of the surface. To do this, measure the lowest part of the boat below the transducer. In this example, we'll use 3 feet. Now, using the keel offset feature, adjust the offset for a negative 3 feet. Please note that adjusting the keel offset only affects the digital depth display and all features that use the digital depth, such as the depth alarms and FishTrack. This doesn't affect the chart at all. Calibrate Speed You can calibrate the speed display if an optional speed sensor is attached. To do this, highlight the "Calibrate Speed" label on the "System Setup" menu, then press the right arrow key. A screen similar to the one at right appears. If the digital speed display is slower than your actual speed, add a positive percentage to make it read faster. If the digital speed display is faster, use a negative percentage to make it read slower. Use the arrow keys to change the speed, then press the ENT key. Press the EXIT key to erase this menu. Simulator This unit has a simulator built in that lets you use it as if you are on the water. All features and functions of the unit are usable. A message appears occasionally to remind you that the simulator is on. To use the simulator, press the MENU key, then press the up or down arrow keys until the "System Setup" menu appears. When it does, press the right arrow key. Now press the up or down arrow keys until the "Simulator" label is highlighted. Finally, press the right arrow key. The unit returns with both simulated digital data and chart echoes.

WINDOWS SUMMARY

GROUP "A"

GROUP "B"

GROUP "C"

GROUP "D"

GROUP "E"

GROUP "F"

GROUP "G"

GROUP "H"

TROUBLESHOOTING
If your unit is not working, or if you need technical help, please use the following troubleshooting section before contacting the factory customer service department. It may save you the trouble of returning your unit. Unit wont turn on: 1. Check the power cables connection at the unit. Also check the wiring. 2. Make certain the power cable is wired properly. The red wire connects to the positive battery terminal, black to negative or ground. 3. Check the fuse. 4. Measure the battery voltage at the units power connector. It should be at least 11 volts. If it isnt, the wiring to the unit is defective, the battery terminals or wiring on the terminals are corroded, or the battery needs charging. Unit freezes, locks up, or operates erratically: 1. Electrical noise from the boats motor, trolling motor, or an accessory may be interfering with the sonar unit. Rerouting the power and transducer cables away from other electrical wiring on the boat may help. Route the sonar units power cable directly to the battery instead of through a fuse block or ignition switch 2. Inspect the transducer cable for breaks, cuts, or pinched wires. 3. Check both the transducer and power connectors. Make certain both are securely plugged in to the unit. Weak bottom echo, digital readings erratic, or no fish signals: 1. Make certain transducer is pointing straight down. Clean the face of the transducer. Oil, dirt, and fuel can cause a film to form on the transducer, reducing its effectiveness. If the transducer is mounted inside the hull, be sure it is shooting through only one layer of fiberglass and that it is securely bonded to the hull. Do NOT use RTV silicone rubber adhesive or Marinetex 2. Electrical noise from the boats motor can interfere with the sonar. This causes the sonar to automatically increase its Discrimination or noise rejection feature. This can cause the unit to eliminate weaker signals such as fish or even structure from the display.
3. The water may be deeper than the sonars ability to find the bottom. If the sonar cant find the bottom signal while its in the automatic mode, the digital will flash continuously. It may change the range to limits far greater than the water you are in. If this happens, place the unit in the manual mode, then change the range to a realistic one, (for example, 0-100 feet) and increase the sensitivity. As you move into shallower water, a bottom signal should appear. 4. Check the battery voltage. If the voltage drops, the units transmitter power also drops, reducing its ability to find the bottom or targets. Bottom echo disappears at high speeds or erratic digital reading or weak bottom echo while boat is moving 1. The transducer may be in turbulent water. It must be mounted in a smooth flow of water in order for the sonar to work at all boat speeds. Air bubbles in the water disrupt the sonar signals, interfering with its ability to find the bottom or other targets. The technical term for this is Cavitation. 2. Electrical noise from the boats motor can interfere with the sonar. This causes the sonar to automatically increase its Discrimination or noise rejection feature. This can cause the unit to eliminate weaker signals such as fish or even structure from the display. Try using resistor spark plugs or routing the sonar units power and transducer cables away from other electrical wiring on the boat. No fish arches when the Fish ID feature is off: 1. Make certain transducer is pointing straight down. This is the most common problem if a partial arch is displayed. 2. The sensitivity may not be high enough. In order for the unit to display a fish arch, it has to be able to receive the fishs echo from the time it enters the cone until it leaves. If the sensitivity is not high enough, the unit shows the fish only when it is in the center of the cone. 3. Use the Zoom feature. It is much easier to display fish arches when zoomed in on a small range of water than a large one. For example, you will have much better luck seeing fish arches with a 30 to 60 foot range than a 0 to 60 foot range. This enlarges the targets, allowing the display to show much more detail. 4. The boat must be moving at a slow trolling speed to see fish arches. If the boat is motionless, fish stay in the cone, showing on the screen as straight horizontal lines.

NOISE A major cause of sonar problems is electrical noise. This usually appears on the sonars display as random patterns of dots or lines. In severe cases, it can completely cover the screen with black dots, or cause the unit operate erratically, or not at all. To eliminate or minimize the effects of electrical noise, first try to determine the cause. With the boat at rest in the water, the first thing you should do is turn all electrical equipment on the boat off. Make certain the engine is off, also. Turn the sonar unit on, then turn off ASP (Advanced Signal Processing). There should be a steady bottom signal on the display. Now turn on each piece of electrical equipment on the boat and view the effect on the sonars display. For example, turn on the bilge pump and view the sonar display for noise. If no noise is present, turn the pump off, then turn on the VHF radio and transmit. Keep doing this until all electrical equipment has been turned on, their effect on the sonar display noted, then turned off. If you find noise interference from an electrical instrument, trolling motor, pump, or radio, try to isolate the problem. You can usually reroute the sonar units power cable and transducer cable away from the wiring that is causing the interference. VHF radio antenna cables radiate noise when transmitting, so be certain to keep the sonars wires away from it. You may need to route the sonar units power cable directly to the battery to isolate it from other wiring on the boat. If no noise displays on the sonar unit from electrical equipment, then make certain everything except the sonar unit is turned off, then start the engine. Increase the RPM with the gearshift in neutral. If noise appears on the display, the problem could be one of three things; spark plugs, alternator, or tachometer wiring. Try using resistor spark plugs, alternator filters, or routing the sonar units power cable away from engine wiring. Again, routing the power cable directly to the battery helps eliminate noise problems. Make certain to use the in-line fuse supplied with the unit when wiring the power cable to the battery. When no noise appears on the sonar unit after all of the above tests, then the noise source is probably cavitation. Many novices or persons with limited experience make hasty sonar installations which function perfectly in shallow water, or when the boat is at rest. In nearly all cases, the cause of the malfunction will be the location and/or angle of the transducer. The face of the transducer must be placed in a location that has a smooth flow of water at all boat speeds. Read the transducer installation section in this manual for the best mounting position.

Your unit is covered by a full one-year warranty. (See inside for complete warranty details.) If your unit fails and the failure is not covered by the original warranty, Lowrance has a flat-rate repair policy that covers your unit and accessories packed with the unit at the factory. There is a 180-day warranty on all non-warranty repairs from the factory, which is similar to the original warranty, but is for 180 days rather than one year. For further details, please call us at the above number.
To order accessories such as power cables or transducers, please contact:
1) Your local dealer. Most quality dealers that handle marine electronic equipment should be able to assist you with these items. Consult your local telephone directory for listings. 2) LEI Extras, Inc. P.O. Box 129 Catoosa, OK 74015-0129 or call 800-324-0045 (USA orders only.)
NOTICE! The storage temperature for your unit is from -4 degrees to +167 degrees Fahrenheit (-20 degrees to +75 degrees Celsius). Extended storage in temperatures higher or lower than specified will damage the liquid crystal display in your unit. This type of damage is not covered by the warranty. For more information, contact the factory's Customer Service Department or your local service center. LITHO IN U.S.A. 988-0133-46