Hummingbird Communications FISHFINDER 425SX User's Manual
Contents
1. or pencil 12 volt power source your boat s battery e A 1 amp fuse A fuse holder if you are wiring directly to the boat s battery Silicone sealant for sealing drilled holes 2 part slow cure epoxy for inside the hull transducer installations Note If you have purchased the 4255 you will have in addition to the parts and instructions above e Speed and Temperature sensors Instructions for installing speed and temperature sensors Appropriate hardware to mount sensors www reelschematic com USING THE 4255 HOW SONAR WORKS HOW SONAR WORKS Your Humminbird unit uses sonar to locate and define underwater objects define the bottom terrain as well as determine distance Sonar technology is based on sound waves Your Humminbird unit sends out a sound wave signal With this signal it determines distance by measuring the time between the transmission of the sound wave and when the sound wave is reflected off an object Your Humminbird uses the reflected signal to interpret location size and composition of an object Sonar is very fast A sound wave can travel from the surface to a depth of 70m 240 and back again in less than 1 4 of a second It is unlikely that your boat can outrun this sonar signal The 425SX is 200 kHz single beam fishfinder The 200 kHz frequency provides excellent sonar resolution the ability to distinguish small returns or returns which are close to the2. 141 LON Od a AON A K lt 6 gt 26 sn 401 uonejjelsuj 1 Jo sn www reelschematic com
3. Power The Power button powers the 425SX up for normal operation When the unit is on POWER turns the unit off POWER can also be used to go directly into Simulator mode To enter simulator with the unit powered off press and hold POWER for several seconds until a continuous chirp is heard Light LIGHT controls the unit s display backlight With the unit powered on press LIGHT once to turn the backlight on low Press LIGHT a second time to turn the backlight on medium a third time to turn the backlight on high and a fourth time to turn the backlight off The backlight is very effective for low light and nighttime operation When the backlight is the 4255X will consume more power than with the backlight off This is important when using the 4255X in a portable configuration powered by a separate battery or when powering the unit from a trolling motor battery 12 OOO www _reelschematic com USING THE 4255X CONTROL FUNCTIONS When powering the unit from a battery such as in portable applications you can prolong the battery life by using the backlight at a minimum The three lower buttons MENU UP ARROW and DOWN ARROW work together to control the 4255 menu controlled user functions 2D View View VIEW selects one of Tg several screen configurations or views possible depending on k the transducer in use When is using standard transducer without the optional speed temp se
4. The display contrast will change as the adjustment is made so the optimum level of contrast can easily be adjusted Use the ARROW buttons to highlight the desired selection Display Speed Display Speed controls the rate at which the graphic information moves across OPTIONS the display There are 5 possible speeds the fastest rate 5 is the factory setting If your boat is stationary or moving very slowly for extended periods it may be desirable to update the display at a slower rate The closer the update rate matches boat speed the more accurate is the graphic depiction of the terrain beneath your boat Use the UP and DOWN ARROWS to select the desired update rate 1 is the slowest 5 is the fastest Use the MENU button to advance to the next menu The Display Speed setting is remembered when the unit is powered off Battery Alarm The Battery Alarm Option OPTIONS allows you to select the voltage level at which the Battery Alarm activates At the Battery i Alarm menu under options you will note that the default setting is OFF Push the DOWN ARROW BUTTON to select the feature ON Push the DOWN ARROW BUTION again to move into the ADJUST BATTERY ALARM setting Using the UP and DOWN ARROW BUTTONS select a voltage between 9 0 and 12 0 22 www reelschematic com USING THE 4255X MENU FUNCTIONS When the voltage drops below your selected voltage an audible alarm will sound and a battery alarm icon will be displayed
5. OFFSET its effect on the accuracy of the speed measurement 2 gt o If there is a discrepancy between the indicated speed and another speed measurement device on the boat the speed measurement can be varied to improve 24 www reelschematic com ADVANCED FEATURES USING DIAGNOSTIC accuracy Remember the speed paddle wheel measures speed through the water not speed over ground Speed offset is remembered after power is disconnected Depth Offset The Depth Offset allows the user to select OPTIONS the point on the boat from which the depth OFFSET measurement is made Selecting a positive value adds distance to the measurement If the transducer is mounted 1 metre beneath the waterline a positive 1 will show the correct depth from the surface of the water 0 Another frequent use of depth offset is show the depth beneath the deepest point of the hull A negative PTIOFS value equal to the distance from the transducer location and the deepest point of the hull will have the same effect as mounting the transducer at the deepest point Depth offset is remembered after power is disconnected Reset With the many User Options available to customize the 425 it is easy to configure the unit in such a way that it is detrimental to a particular use By using the Reset function all variable or user controlled features of the 4255 are returned to the factory setting
6. Surface Clutter Surface clutter is the layer of water near the surface that is rich in algae and other growth and often is aerated by wind or wave action This area of water interferes with sonar transmission and often appears on screen as regular clusters of individual dots near the 0 line Thermoclines Thermoclines are sharp differences in water temperature These are easily identified by the continuous nature of the return Second Returns When sonar signal is reflected off the bottom back to the transducer there is often enough energy left in the signal to be reflected off the surface of the water back to the bottom a second time Second returns appear as a slightly weaker bottom representation exactly twice the depth of the primary bottom return The second return is most likely to occur in shallow water and in areas of relatively hard bottom Thermocline Second Return PTT 618 Fish Arches With Fish ID off schools of bait fish as well as individual fish are clearly visible on the 425SX display Bait fish appear as clouds having different shapes and sizes depending on the number of fish and boat speed Individual fish appear as smaller black and gray lines often appearing as a fish arch A fish arch forms as the boat moves over the fish Due to the transducer beam angle the distance to the fish decreases as it moves into the beam and then increases as it moves out When the window graphs this di
7. bottom while providing depth capabilities to 185m 600 The shape of the sonar beam is symmetrical and covers an area of approximately 24 degrees side to side and front to rear Actual depth capability depends on factors such as bottom hardness water conditions and transducer installation Units will typically read to deeper depths in fresh water than in salt water SIMULATOR OPERATION The 4255 contains a simulator that allows you to use the unit as if you are on the water The simulator is invaluable for learning how to operate the 4255 There are two ways to start the simulator If the unit is powered off press and hold the POWER button for approximately three seconds until you hear a continuous chirp www reelschematic com USING THE 4255 SIMULATOR OPERATION The simulator can also be started by selecting the Simulator option on the start up screen after you power up the unit When this screen is shown simply press the DOWN ARROW until Simulator is highlighted When the screen times out the unit will be in simulator mode OPTIONS START UP SIMULATOR DIAGNOSTIC When in simulator operation the 4255 responds to control inputs as if it is in actual operation so feel free to experiment or to customize the unit for your particular operation To exit Simulator mode power the unit off FEATURE MEMORY If your 4255 is installed with a transducer connected any changes you make to the
8. excess of 20 or less than 10 VDC cause the unit to power off The Triplog resets at power off AVG SPEED VOLTS elapsed since power up or 718 6 5 14 24 127 Options The Options Menu is a series of linked menu functions used initially to set your preferences Once your preferences are selected it is unlikely these functions need to be accessed during the normal operation of the product The Option menus include Contrast Display Speed Battery Alarm Bottom Black Fish ID Numeral size Units Speed Units Depth Language Speed Offset Depth Offset and Reset Press the view key at any time to exit options and return to normal operation OPTIONS OPTIONS Languages The language menu displays available language choices Included in the 4255X ENGLISH are ENGLISH FRENCH ITALIAN GERMAN NORWEGIAN SWEDISH SPANISH FINNISH PORTUGUESE POLISH DANISH FRANCAIS HUNGARIAN AND DUTCH To select your language ITALIANO push the UP or Down Arrow Buttons to scroll through the list www reelschematic com USING THE 425SX MENU FUNCTIONS Contrast The Contrast function allows the user to OPTIOHS control the level of contrast of the LCD display The 4255 will automatically adjust the display contrast to compensate for changing ambient temperatures however some situations may occur where manual adjustment will provide a higher level of contrast Eleven contrast settings 5 to 5 are possible
9. of O factory setting has no effect on the automatic sensitivity control Increasing the sensitivity 1 through 5 enables the unit to display the information from progressively smaller sonar returns By decreasing the sensitivity 1 through 5 the Low Sensitivity unit effectively filters small sonar returns High Sensitivity Sensitivity at 0 TEMP SPEED In murky or muddy water it is often helpful to reduce the sensitivity This prevents the display from being cluttered with sonar returns from debris or suspended particles In very clear or very deep water it may be helpful to increase the sensitivity since even the smallest sonar return may be of interest to the user To adjust Sensitivity press MENU repeatedly until the Sensitivity heading is displayed When the Sensitivity menu appears use the UP ARROW to increase the sensitivity or the DOWN ARROW to reduce sensitivity To sequence through the available settings press and hold either ARROW button Release the button at the setting you want to select After an adjustment is made the menu disappears and the new sensitivity setting is in affect If additional time is needed to study a menu press and hold the MENU button and the menu will remain on screen indefinitely If you need to make an additional adjustment press the UP ARROW or DOWN ARROW button Depth Range The Depth Range function controls the vertical distance displayed on the graphic are
10. on screen with current voltage OPTIOHS level BOTTOM BLACK Bottom Black There are two selections available Off and On The factory setting is Off With this setting the 425SX displays the bottom using 4 level grayscale This allows you to determine the texture and relative hardness of the 9 bottom Selecting Bottom Black ON causes the unit to blacken in the display below the bottom This gives the user easiest recognition of the bottom location even from a great distance The 425SX remembers the Bottom Black setting when powered off Bottom Black View Fish ID There are three selections available Off ID ON and Adjust The factory setting is ID OFF With jD On Raw Sonar Fish ID Off sonar returns are displayed as raw information There is no interpretation made by the unit Selecting ID ON also enables the fish alarm 35 ID On enables the 4255X to interpret the raw sonar x data and using a variety of techniques depict appropriate target returns as one of three different OPTIONS size fish symbols Further identification shows which beam the fish is detected in The 4255 also displays the depth beneath the surface with the OFF corresponding fish symbol ADJUST 23 www reelschematic com USING THE 4255X MENU FUNCTIONS Selecting Adjust and making incremental changes enhances the fishfinder s ability to identify sonar returns ME TUNG as fish symbol
11. provides a way to adjust the transducer after installation The mounting hardware included is designed to protect both the boat and the transducer should the boat strike debris in the water or when trailering As an alternative to transom mounting it is possible on many fiberglass hulled boats to glue the transducer on the inside of the boat hull Since fiberglass has similar sonar characteristics as water the sonar signal can pass through the boat hull with minimal loss The hull of the boat must be single layer construction not double hulled Inside the Hull Mounted Transducer Also any air trapped in the lamination of the fiberglass would prevent the sonar www reelschematic com INSTALLATION PREPARATION ALTERNATE TRANSDUCERS AND MOUNTING METHODS signal from passing through Inside the hull installations require no holes to be drilled into the boat and through experimentation high speed operation comparable to transom mounting can be achieved Two part slow cure epoxy is required to glue the transducer in place ALTERNATE TRANSDUCERS AND MOUNTING METHODS The 4255X comes with everything necessary for installation and operation on most boats However there are several situations which may require a different type of transducer Inboard boats wood or metal hulls and sail boats create unique transducer mounting needs Alternate transducers and mounting methods are detailed below Portable Mounting The standar
12. TALLATION OVERVIEW The 4255X consists of two primary components to install the control head and the transducer The control head contains the sonar transmit and receive circuitry as well as the user controls and display It should be installed in a location that provides access to the controls and visibility while in use The control head mounts on a quick disconnect mounting system that swivels and tilts providing flexibility for viewing from almost anywhere on the boat www reelschematic com INSTALLATION PREPARATION INSTALLATION OVERVIEW The transducer converts electrical energy from the transmitter into mechanical pulses or sound waves The transducer also receives the reflected sound waves and converts them back into electrical signals for display on the control head It should be installed in contact with the surface of the water in an area that has smooth water flow usually on the transom of the boat There are several mounting options for the transducer Review the following section to determine the method that works for you and your boat Determining How to Mount the Transducer The 425SX includes a model 6 24 transducer This transducer can be mounted on the transom of the boat or bonded to the inside of a fiberglass hull boat The transom installation which is the most widely used places the transducer on the outside of the boat hull This technique Trahsom Mounted Transducer produces the least signal loss and
13. The current input voltage is displayed If voltage fluctuations or power supply in excess of 20 VDC or less than 10 VDC is suspected use the diagnostic screen to confirm input voltage Often small outboard motors do not effectively regulate voltage when operated at high engine speeds Use Diagnostic while running the boat at high speeds to show the voltage gain Also if you are using the 4255X in portable configuration or from the trolling motor battery Diagnostic can be used to evaluate the health of the battery by showing the present voltage Total Time The total time category indicates the total time the unit has been in use since shipped from the factory It is normal for some hours to appear in the total time when the unit is new due to factory testing While this is often of interest to the user it is primarily a diagnostic tool for the repair technician should the unit need service 26 www reelschematic com ADVANCED FEATURES MAINTENANCE TROUBLESHOOTING MAINTENANCE Your 4255X is designed to provide years of trouble free operation with virtually no maintenance Follow these simple procedures to ensure your 425SX continues to deliver top performance e 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
14. a of the display There are nine depth ranges available The top of the range is always 0 or the surface of the water Ranges of 0 5 0 10 0 20 0 40 0 60 0 80 0 110 0 150 and 0 185 metres and imperial ranges of 0 15 0 30 0 60 0 120 0 180 0 240 0 360 0 480 and 0 600 www reelschematic com USING THE 425SX The range that positions the bottom depiction closest to the bottom of the screen will best utilize the available display resolution Using the factory setting of AUTO the 4255X can automatically adjust the depth range depending on the depth of the water The unit tries to maintain the bottom depiction about down the total range for example in 6 m 20 of water the 0 10m 0 30 range would be selected This provides the best display resolution and therefore the best target separation possible The Depth Range can be adjusted manually Press MENU repeatedly until the Depth Range menu is visible Two options are available Auto and Manual The manual setting enables you to adjust the current depth range setting The unit no longer adjusts the Depth Range to the most appropriate range for bottom display Often the bottom may not be visible on screen The digital depth readout MENU FUNCTIONS DEPTH RANGE always determines the depth of the bottom even if it is not visible on screen Using manual Depth Range control you can view sonar information from the area near the surface in grea
15. active menu Press MENU to bring up the last menu used Chart View DEPTH RANGE AUTO MANUAL Arrow Keys The UP ARROW and DOWN ARROW make adjustments to menu functions On the left side of every menu there are UP ARROW and DOWN ARROW symbols The symbols indicate which ARROW button has a function in a particular situation Either one or both ARROW buttons can be used to adjust the menu function A hollow ARROW symbol means the corresponding ARROW button has no function Pressing that button will result in no adjustment and the error audible will be heard A solid ARROW symbol means the corresponding ARROW button can be used to affect the menu adjustment Abbreviated Menu The ARROW buttons often can be used when no menu is on screen In these situations pressing the ARROW button affects the function of the active last used menu This is a short cut to menu Abbreviated Menu operation An abbreviated menu appears on screen while the adjustment is made and times out A frequently used menu can be adjusted very quickly using this technique www reelschematic com USING THE 425SX MENU FUNCTIONS After an adjustment is made to a menu function the menu times out after a few seconds and the unit returns to normal operation Menu Layout All menus use the same basic layout The heading at the top describes the menu function The UP ARROW and DOWN ARROW symbols to the left of the menu indicate which but
16. d transducer can be adapted for portable installations using part number MHX PT2 This accessory adapts your transducer to a suction cup mount for temporary installation on the boat hull or other surface Trolling Motor Mounting The standard transducer can also be adapted to mount on most trolling motors using part number AD STM 7 This accessory includes a bracket and hose clamp that allows mounting the transducer to the body of most trolling motors TRANSDUCER EXCHANGE Other transducers are available as replacements for the standard transducer You may exchange your new and unassembled transducer for another type by returning it to the address listed in Customer Support Some transducers may have additional costs Refer to the Accessory catalog or call Customer Support for information www reelschematic com INSTALLATION PREPARATION BEGINNING INSTALLATION BEGINNING INSTALLATION Now that you have determined the transducer mounting method you can begin installation of the 425 The fold out installation guide included provides detailed step by step instructions for installation of the control head and transducer For transom mount transducer installations you will need the mounting template at the back of this manual In addition to the parts included you need the following for installation and operation A powered hand drill and various drill bits Phillips and flat head screw drivers e A ruler or measuring tape
17. ducer is selected and the trolling motor is out of water no sonar information appears If none of the above solve the problem inspect the transducer cable from end to end for breaks kinks or cuts in the outer casing of the cable If the transducer is connected to the unit through a switch temporarily connect it directly to the unit and try again If none of these items identifies an obvious problem the transducer itself may be the problem Be sure to include the transducer if returning the unit for repair 4 When in very shallow water get gaps in the bottom reading and inconsistent digital depth indication The 4255X will work reliably in water 6m 2 or deeper The depth is measured from the transducer not necessarily from the surface 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 hi
18. e upper and lower depth limits of the Zoom range are shown on the right side of the Zoom view Note It is not possible to use Zoom in conjunction with the Large Digital View DEPTH ALARM To disable Zoom press the MENU button until the Zoom menu is on screen Use the UP ARROW to highlight Off and let the menu time out When the unit is powered off the Zoom menu returns to Zoom Off Depth Alarm The 4255X contains an audible alarm to warn you of shallow water depths The alarm is adjustable to depths of 6m 2 to 30m 99 When the alarm is enabled an audible alarm sounds if the water beneath the boat is equal to or less than the selected alarm depth The alarm sounds continuously for about five seconds and www reelschematic com 20 USING THE 4255X MENU FUNCTIONS then intermittently to remind you that you are still in shallow water Additionally the 4255 can anticipate quickly changing terrain and sound the Depth Alarm before the bottom depth actually reaches the preset alarm depth Fish Alarm The Fish Alarm alerts you to the presence of fish or other targets not connected to the bottom The Fish Alarm has three different settings that correspond to the three different size fish symbols shown on screen The default setting is OFF With the Large fish only setting the 4255X alarms on only those targets that are represented by the large fish symbols The 425SX can be set to alarm on only la
19. gh speed operation This can also be a result of air or turbulence in the transducer location caused by rivets ribs etc 29 www reelschematic com ADVANCED FEATURES TROUBLESHOOTING 7 My unit loses power at high speeds Your 4255X has 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 engines alternator and can produce voltage in excess of 20 volts when running at high RPMs The 4255X displays input voltage in the Diagnostic screen Use this readout to determine if the voltage exceeds 20 VDC 8 The screen begins to fade out Images are not as sharp as normal Check the input voltage using Diagnostic The 4255X 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
20. ll range information is shown on the right side of the display The area which is being enlarged by Zoom is indicated by the square box Zoom can either operate automatically in which the Zoom range is constantly adjusted to show the bottom or manually in which the user controls the location of the Zoom range MANUAL Automatic Zoom is especially helpful when looking for structure or bottom detail The Automatic Zoom keeps the bottom in view even in quickly changing terrain Manual Zoom provides detailed information of any area from the surface to the bottom ADJUST 18 www _reelschematic com USING THE 425SX MENU FUNCTIONS In Manual Zoom the Zoom range does not move as the terrain changes To operate Zoom press MENU repeatedly until the Zoom menu is on screen Three options are available Off Factory Setting Auto Automatic bottom tracking Zoom and Manual User controlled Zoom range Press the DOWN ARROW once to highlight Auto or twice to highlight Manual If Manual is selected a submenu will appear Lower Zoom Limit allowing manual zoom range adjustment When the menu disappears full range information is displayed on the right as always The square box indicates the Zoom range In Auto Zoom the box will move vertically to remain in the general area of the bottom return The left side of the screen is a magnified view of the information seen inside the Zoom range box Th
21. mounted at least 38cm 15 from the prop For Service and or repair of your 425SX please contact your local dealer Further information on HUMMINBIRD products can be found at www humminbird com 30 www reelschematic com SPECIFICATIONS Languages supported Danish Dutch English Finnish French German Hungarian Italian Norwegian Polish Portuguese Spanish and Swedish Operating 200 kHz Power Output 000000 400 Watts RMS 3200 Watts Peak to Peak Area of Coverage 24 at 10 db Power Requirement 10 20 VDC Display Ma MET FSTN LCD LCD 09165 4 af 2 7 160 H x 160 V Viewing Area 10cm H x 7 6cm V 4 H x 3 V Mounting Quick Disconnect Mount Unit Seen 19 4cm x 20cm W x 11cm D 7 H x 7 x 4 D Transducer Standard XT 6 24 Transducer Cable Length 6 metres 20 Depth Ranges 5 10 20 40 60 80 110 150 amp 185 metres 15 30 60 120 180 240 360 480 amp 600 Zoom Ranges 2 5 10 15 20 28 38 amp 46 metres 7 15 30 45 60 90 120 150 www reelschematic com www reelschematic com Use this template with transducer mounting bracket 403606 Y 7 H3H1I3 SIHL LOASHALNI
22. nsor connected the VIEW button toggles the display between the full screen 2D View and the Large Digital Readout View The 2D View is the default view and the view which is first seen at power up Pressing VIEW Large Digit View again will select the Large Digital Readout View which increases the size of key digital information so that it can be viewed from a great distance Normal 2D information is displayed on the right side of the display Pressing VIEW again will toggle the display back to the 2D view When using the standard transducer with the optional speed temp sensor connected the VIEW button toggles the display between the full screen 2D View the Chart View and the Large Digital Readout View 13 www reelschematic com USING THE 425SX 14 CONTROL FUNCTIONS The Chart View shows only the digital depth readout leaving more screen area for fish location and bottom depiction Menu MENU displays a menu on screen for adjustment In normal operation pressing MENU repeatedly cycles through all available menus A menu remains on screen for several seconds and can be adjusted by using the ARROW keys If no adjustment is made in the allotted Menu time the menu disappears If you want the menu to remain on screen longer press and hold MENU the menu will remain on screen indefinitely Once you release the menu button the screen will time out Once a menu times out it is still considered the
23. on 2 USING 255 6 How Sona Wok ww 6 Simulator 6 What You See On Screen amp 7 12 ef 12 15 l r 15 25 Section 3 ADVANCED FEATURES 25 Using Diagiiosticf 2 Bm 25 Section SaMAINTENANCES lt a 27 Maintenance and Troubleshooting 27 30 Specfiastong B AM 397 31 www reelschematic com INSTALLATION PREPARATION PARTS SUPPLIED PARTS SUPPLIED Before installing your 4255X please ensure the following parts are included in the box 4255X fishfinder Transducer with 6m 20 of cable and mounting hardware kit Mounting system and mounting hardware kit 2m 6 power cable Publications kit Note The 4255X includes speed and temperature sensors with appropriate hardware and instructions for installation If any of these items are missing contact your local dealer ACCESSORIES Humminbird offers a wide assortment of accessories that complement and expand the capability of your new 4255X These accessories are designed with the same high standards The Humminbird Accessory catalog included with your unit contains descriptions of the many accessories available and ordering information All Humminbird accessories are available through your full service Humminbird dealer INS
24. 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 e If your boat remains in the water for long periods of time algae and other marine growth can reduce the effectiveness of the transducer Periodically clean the face of the transducer with liquid detergent Pivoting the transducer up in the bracket may allow better access for inspection or cleaning If your boat remains out of the water for a long period of time it may take some time to wet the transducer when returned to the water Small air bubbles can cling to the surface of the transducer and interfere with proper operation These bubbles dissipate with time or you can wipe the face of the transducer with your fingers after the transducer is in the water e Never leave the 425SX in a closed car or trunk the extremely high temperatures generated in hot weather can damage the electronics TROUBLESHOOTING Do not attempt to repair the 4255X yourself There are no user serviceable parts inside and special tools and techniques are required for reassembly to ensure the waterproof integrity of the housing Repairs should be performed only by authorized Humminbird technicians Many requests for repair received by Humminbird involve units that do not actually need repair These units are returned no problem found If you have a problem with your 4255 use the following tro
25. r Regardless of the object the sonar detects each could be drawn as an arch Fish ID The 425SX uses advanced signal processing to further evaluate any sonar return between the surface and the bottom For instance a small school of bait fish usually appears as a dense cluster of individual dots If the return meets certain additional criteria a fish symbol will be assigned There are three different size fish symbols used to indicate ID Fish Depth 185 www reelschematic com USING THE 425SX CONTROL FUNCTIONS the intensity of the sonar return While signal intensity is a good indicator of relative fish size different species of fish have different sonar characteristics so it is not always possible to distinguish fish size between varying species The signal intensity is normalized for depth so that a small fish close to the boat does not appear as a large fish symbol ID adds an additional piece of information to help the user locate fish On selected fish symbols the digital depth of the designated fish is drawn to help locate the fish vertically This is especially helpful in setting bait depths or for downrigger operation CONTROL FUNCTIONS The 4255X uses a simple six button keypad for all user input Press any button and an audible chirp confirms the control input If a button has no function or is inappropriate for the situation an audible error is heard The unit sounds multiple chirps
26. rge and medium fish or set to alarm on all fish Once the Fish Alarm is enabled the 4255X emits an audible beep when the selected size fish symbol appears on screen The sound is slightly different for each of the three fish symbol sizes so with practice it is possible to distinguish the size of the detected fish without looking at the unit Fish Alarm settings are remembered when the unit is powered off Triplog Triplog provides a running log of information based on input from the Temp Speed sensor Since Triplog requires information from the Temp Speed sensor to operate if this sensor is not detected by the 425SX the Triplog menu will not appear as an option FISH ALARM www reelschematic com USING THE 4255X MENU FUNCTIONS TIMER DISTAHLE 05 37 7 811 Triplog provides four pieces of information the total time reset the distance traveled since the 425SX was powered up or reset the average speed and the input voltage from your boat s electrical system The time speed and distance 20 feos 3 calculations useful for tracking your progress on a Triplog trip The input voltage is useful for determining the condition of the charging system of the boat When used in a portable application or whenever the 425SX is operated from a battery source the voltage number can be used to determine battery life The 4255X will operate at voltages from 10 to 20 VDC Voltages in
27. s Increasing the value to a number greater than zero shows more fish symbols on screen In this case smaller sonar returns will be depicted as fish symbols This is useful for identifying many smaller sonar returns such as bait fish as fish symbols Decreasing the value to a number less than zero shows fewer fish symbols on screen In this case smaller sonar returns are disregarded This is useful for eliminating many small sonar returns when seeking larger species of fish The 425SX remembers this selection even when the unit is powered off Numeral Size Two options are available Big and Small The factory setting is Big With this setting the OPTIONS digital depth and speed and temp numerals are drawn large enough to be read from across the boat The big numerals occupy space on the display that could be used for the graphics area Hence the small numerals option With small numerals selected a greater amount of the display area is available for the graphic view This effectively increases the display resolution of the unit Numeral Size settings are remembered when powered off OPTIOHS Units Speed Units of Speed allows the selection of UHITS SPEED MPH statute miles per hour KTS nautical miles per hour or KPH Kilometers Per Hour Use the Arrow buttons to highlight the desired selection ETS Speed Offset The Speed Offset option allows the OPTIONS user to compensate for differences in hull design and SPEED
28. s The Reset function is an important first step in troubleshooting problems to ensure that a user selected setting is not the cause for the perceived problem USING THE DIAGNOSTIC FEATURE DIAGHOSTIE The 4255 contains a powerful diagnostic tool that can aid in determining the cause Fassad of a problem Connected To use the Diagnostic feature select the Diagnostic feature on the start up menu of the initial screen 12 0 E hrs Press VIEW for next screen 25 www reelschematic com ADVANCED FEATURES USING DIAGNOSTIC Self Test Initially the 4255X will perform a self test This test confirms the operation of all internal circuitry At the conclusion of the test one of two messages will appear PASSED indicates the internal test discovered no failures FAILED indicates a significant internal problem was discovered and the unit requires factory service A code number appears that tells repair personnel where the problem is Transducer Connection The first connection tested is Transducer input If a transducer is detected the message CONNECTED appears If a series of dashed lines is shown no transducer is connected or there is a problem with the transducer or cable If you are using multiple transducers switch between transducers to confirm the connections for each Voltage Input Another connection tested is the voltage input and is especially helpful in diagnosing input voltage problems
29. s 4 discrete levels of gray to indicate the intensity of the returned sonar signal The 4255X can display even the smallest sonar returns with light gray pixels Larger returns are displayed with darker shades of gray If the bottom is hard and smooth the bottom depiction is narrow and dense If the bottom is soft mud or sand the depiction will be thick and less dense This indicates that much of the signal is absorbed by the soft bottom If the bottom is rocky or rugged in composition the depiction is of varying density and textured in appearance Wave action also affects the bottom depiction The information drawn is a distance measurement so if the boat is moving up and down Over flat bottom the bottom depiction often appears in regular variations that match wave timing Surface Clutter Rocky Bottom Structure Structure is defined as any object physically attached to the bottom The sonar configuration of the 4255X is optimized to give the most accurate depiction of bottom structure possible Grass trees stumps wrecks or other debris are accurately displayed however the Yard Bottom Soft Bottom www reelschematic com 10 USING THE 425SX WHAT YOU SEE ON SCREEN depiction of these objects varies with boat speed and direction The best way to learn to interpret structure is to operate the 425 over a variety of known conditions and experiment with user functions to best represent those conditions on screen
30. set up or User Options see Control Functions while in Simulator are retained in the unit s memory This allows you to use simulator to experiment with the various set up options and retain your selected settings for normal operation If you are using the 425SX in Simulator when no transducer is connected any selected options are lost when the unit is powered off The 4255X will return to Factory Settings or options selected when last used with a transducer if no transducer is connected IMPORTANT A transducer must be connected to 4255 in order to retain user settings selected when in simulator mode If no transducer is detected the unit defaults to pre selected options when powered off What You See On Screen Your 4255X uses a 160 x 160 matrix FSTN LCD display This display provides outstanding viewability in all light conditions over a wide range of temperatures www reelschematic com USING THE 425SX WHAT YOU SEE ON SCREEN At initial power up the 4255X uses settings that were set at the factory After initial use the 425SX will remember the settings you enter There are several elements on screen that are common to all modes of operation Figure A Temperature Speed initial screen layout takes one of two basic forms depending on whether the optional Temp Speed accessory is installed Figure A shows the default view when the Temp Speed accessory is installed Figure B shows the default vie
31. stance change an arch appears The true depth of the fish is the top of the arch when the boat is directly over the fish Boat www _reelschematic com USING THE 425SX WHAT YOU SEE ON SCREEN speed and movement of the fish greatly affect the shape of the arch When moving slowly a fish creates an elongated arch With the boat ii ri moving fast the arch appears shorter A partial arch forms when the fish does not move through d the entire cone angle l A Fish Arch Diagram The 4255X displays structure such as submerged grass brush trees and wrecks on the bottom Structure can be distinguished by comparing the area just above and below the main bottom return Usually structure shows as areas of dark to light gray on top of a dark bottom contour The appearance of structure is greatly affected by boat speed and direction to repeat the same image it is often necessary to travel the same speed and direction over the location where the structure was originally located The 4255X is also capable of showing layers of water having different temperatures These temperature differences called thermoclines appear at different depths depending on current conditions A thermocline typically appears as a continuous band of light gray moving across the display at the same depth Thermoclines always appear above the bottom It is important to remember that sonar cannot distinguish between a fish and some other object suspended in the wate
32. ter detail To return to automatic Depth Range control press the MENU button until the Depth Range menu appears on screen and use the UP ARROW to select AUTO 39 16 6 8 TEMP SPEED Depth Range 17 www reelschematic com USING THE 4255X MENU FUNCTIONS Zoom The 4255X uses a greatly enhanced Zoom capability called TruZoom which offers expanded information on a select area of sonar information Zoom is similar to Depth Range because it controls the AUTO range of information displayed on screen Zoom however allows for selection of ranges beneath the MANUAL surface so any area of water between the surface and the bottom can be enlarged to provide more detailed information By using the full display to show a small area of coverage the effective display resolution is increased and the unit s ability to separate close targets is enhanced The Zoom ranges available are dependent on the current depth range In the 5m 15 depth range TruZoom displays a range equal to one half the current depth range In the 10m 30 20m 60 40m 120 60m 180 80m 240 110m 360 150m 480 and 185m 600 depth ranges TruZoom displays a range equal to one fourth the current depth range The box at the right side of the screen outlines the area to be zoomed 4255X shows Zoom range in conjunction with the full depth range The Zoom range is shown on the left side of the screen and fu
33. tons are available for adjustment In menus that have several possible settings a range of adjustment indicator shows the total range available and the current setting Within the menu are the options available The selected option or current setting is highlighted in the black box If no adjustment is made this is the selected setting Press an ARROW button while the menu is displayed to select another option Several of the menus are multi step In some situations if an adjustment is made additional options become available for further adjustment Examples of these multi step menus are Depth Range Depth Alarm and Zoom See the detailed description of each function for further explanation Menu Functions Heading 7 Arrow Symbols Up Arrow Option Selected Setting Down Arrow Option Range of Adjustment Indicator Sensitivity The Sensitivity function controls the sensitivity of the sonar receiver The 4255X automatically adjusts the level of receiver sensitivity based on a number of factors including the depth of the water and the level of noise present Noise can be caused by other electronic devices engines trolling motors propeller cavitation and hydrodynamic flow among others 15 www reelschematic com 16 USING THE 4255X MENU FUNCTIONS The user has the option of adjusting the Sensitivity higher or lower based on personal preference You can select one of 11 sensitivity settings from 5 to 5 A setting
34. ty to detect and identify that a transducer is connected First ensure that an appropriate transducer connector is positioned correctly in the connector holder and that the unit is fully seated on the mount Second inspect the transducer cable from end to end for breaks kinks or cuts in the outer casing of the cable Also ensure the transducer is fully submerged in water If the transducer is connected to the unit through a switch temporarily connect it directly to the unit and try again If none of these items identifies an obvious problem the transducer itself is probably the problem Be sure to include the transducer if returning the unit for repair 3 There is no bottom reading visible on the display There are a number of possible causes for this condition If the loss of bottom information occurs only at high boat speeds the transducer needs adjusting If the digital depth readout is working but there is no bottom visible on screen it is possible the depth range has been adjusted manually to a range lower than what is needed to display the bottom Also in very deep water it may be necessary to manually increase the sensitivity setting to maintain a graphic depiction of the bottom www reelschematic com ADVANCED FEATURES TROUBLESHOOTING If you are using a transducer switch to connect two transducers to the 4255X ensure the switch is in the correct position to connect a transducer that is in water If a trolling motor trans
35. ubleshooting guide before calling your dealer or sending your unit in for repair The 425SX contains several tools that can aid in determining if there is a problem and how to isolate and repair the problem in many cases 27 www reelschematic com 28 ADVANCED FEATURES TROUBLESHOOTING 1 Nothing happens when I turn the unit on Check the power cable connection at both ends Be sure the cable is connected correctly to a reliable power source red lead to positive black lead to negative or ground Ensure the power available at the mount is between 10 and 20 VDC If the unit is wired through a fuse panel ensure the panel is powered Often accessory fuse panels are controlled by a separate switch or the ignition switch Also often a fuse can appear to be good when in fact is not Check the fuse with a tester or replace it with a fuse known to be good Check the power connection to the 4255 It is possible to force the power cable connector into the cable holder incorrectly If the connector is reversed the unit will not work Examine the contacts on the back of the unit to ensure there is no corrosion Finally ensure the unit is firmly seated on the mount The electrical con tacts are not made until the unit is fully seated Ensure the metal cable retainer is properly installed in the mount If not the power connection may push out when the unit is put on the mount 2 There is no transducer detected The 4255X has the abili
36. w when the Temp Speed accessory is not installed Depth The digital depth Figure B number shows the water depth directly beneath the transducer location Bottom Depiction Zero Line Depth Range The depth range is shown to the right of the screen The upper number is 0 indicating the surface of the water The lower number is one of the nine depth ranges available that best match the depth of the water As the depth of the water changes the m range changes as necessary in 29 order to retan bottom representation on screen Water Depth Depth Range www reelschematic com USING THE 4255X WHAT YOU SEE ON SCREEN When in Auto mode the horizontal line at the top of the screen is the zero line representing the surface of the water Occasionally there is a gap in this line This gap indicates the unit is updating the display even if the bottom is not visible on screen or if the bottom information is not changing New sonar information appears on the right side of the graphic area of the display and moves to the left as new information is displayed The 4255X automatically selects the appropriate depth range to show the depth of water beneath the transducer This range is selected so the bottom representation is typically shown about down the display Bottom The graphic depiction of the bottom provides the user with an effective tool for understanding the composition of the bottom The FSTN type display use
37. www reelschematic com A255 OPERATIONS MANUAL by HUMMINBIRD www reelschematic com THANK YOU THANK YOU FOR CHOOSING YOUR 4255X FISHFINDER MADE BY TECHSONIC INDUSTRIES MANUFACTURER OF AMERICA S 1 NAME IN FISHFINDERS HUMMINBIRD HUMMINBIRD HAS BUILT ITS REPUTATION BY DESIGNING AND MANUFACTURING TOP QUALITY THOROUGHLY RELIABLE MARINE EQUIPMENT YOUR HUMMINBIRD PRODUCT IS DESIGNED FOR TROUBLE FREE USE IN EVEN THE HARSHEST MARINE ENVIRONMENT IN THE UNLIKELY EVENT THAT YOUR DOES REQUIRE REPAIRS WE OFFER AN EXCLUSIVE SERVICE GUARANTEE COMPLETE DETAILS ARE INCLUDED AT THE END OF THIS MANUAL WE ENCOURAGE YOU TO READ THIS OPERATIONS MANUAL CAREFULLY IN ORDER TO GET FULL BENEFIT FROM ALL THE FEATURES AND USES OF YOUR HUMMINBIRD PRODUCT WARNING THIS DEVICE SHOULD NOT BE USED AS A NAVIGATIONAL AID TO PREVENT COLLISION GROUNDING BOAT DAMAGE OR PERSONAL INJURY WHEN THE BOAT IS MOVING WATER DEPTH MAY CHANGE TOO QUICKLY TO ALLOW TIME FOR YOU TO REACT ALWAYS OPERATE THE BOAT AT VERY SLOW SPEEDS IF YOU SUSPECT SHALLOW WATER OR SUBMERGED OBJECTS www reelschematic com TABLE OF CONTENTS Section 1 Installation preparation 2 Parts Supplied u cease ieee en 2 Accessories 2 Installation Overview 2 Alternative Transducers and Mounting Methods 4 Beginning 5 5 Secti
Download Pdf Manuals
Related Search