Hummingbird Communications 425SX Operation Manual Download Page 29 | Manualshive

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ADVANCED FEATURES

MAINTENANCE/TROUBLESHOOTING

MAINTENANCE

Your

425SX

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.

• 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 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.

• 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

425SX

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

425SX

, use the following troubleshooting 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.

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Summary of Contents for 425SX

Page 1: ...OPERATIONS MANUAL www reelschematic com www reelschematic com ...

Page 2: ...AIRS 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 D...

Page 3: ... Installation 5 Section 2 USING THE 425SX 6 How Sonar Works 6 Simulator Operation 6 What You See On Screen 7 12 Control Functions 12 15 Menu Functions 15 25 Section 3 ADVANCED FEATURES 25 Using Diagnostic 25 Section 5 MAINTENANCE 27 Maintenance and Troubleshooting 27 30 Specifications 31 TABLE OF CONTENTS www reelschematic com www reelschematic com ...

Page 4: ... 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 INSTALLATION OVERVIEW The 425SX consists of two primary components to install the control head and the transducer The cont...

Page 5: ...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 produces the least signal loss and 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 ...

Page 6: ...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 t...

Page 7: ...red hand drill and various drill bits Phillips and flat head screw drivers A ruler or measuring tape Pen or pencil 12 volt power source your boat s battery 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 INSTALLATION PREPARATION BEGINNING INSTALLATION 5 Note If...

Page 8: ...s a 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 the 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...

Page 9: ...ile 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 425SX will return to Factory Settings or options selected when last used with a ...

Page 10: ...he default view when the Temp Speed accessory is not installed Depth The digital depth number shows the water depth directly beneath the transducer location 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 wat...

Page 11: ...an 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 depic...

Page 12: ...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 Fish Arches With Fish ID off schools of bait fish as well as individual fish are clearly visible on the 425SX display Bait fis...

Page 13: ...wing 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 oth...

Page 14: ...or the situation an audible error is heard The unit sounds multiple chirps 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 displa...

Page 15: ...iew 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 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 th...

Page 16: ...ft 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 ...

Page 17: ...isplayed 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 Sensitivity The Sensitivity function controls the sensitivity of the s...

Page 18: ... 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 p...

Page 19: ...edly 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 always determines the depth of the bottom even if it is not visible on screen ...

Page 20: ...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 The 425SX shows Zoom range in conjunction with the full depth range The Zoom range is shown on the left side of the screen and full range information is shown on the right side of the display The ...

Page 21: ...agnified view of the information seen inside the Zoom range box The 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 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 t...

Page 22: ...mbols The 425SX can be set to alarm on only large and medium fish or set to alarm on all fish Once the Fish Alarm is enabled the 425SX 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 se...

Page 23: ...r off The Triplog resets at power off 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 Spe...

Page 24: ... 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 rem...

Page 25: ...reat distance The 425SX remembers the Bottom Black setting when powered off Fish ID There are three selections available Off ID ON and Adjust The factory setting is ID OFF With 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 ID On enables the 425SX to interpret the raw sonar data and using a variety ...

Page 26: ... 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 whe...

Page 27: ...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 425SX 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 425SX are...

Page 28: ...ecially helpful in diagnosing input voltage problems 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...

Page 29: ...g 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 Never leave the 425SX in a closed car or trunk the extremely high temperatures gene...

Page 30: ...cer detected The 425SX has the ability 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...

Page 31: ...n The 425SX 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 disconn...

Page 32: ...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 station...

Page 33: ... 10 20 VDC Display FSTN LCD LCD Matrix in pixels 160 H x 160 V Viewing Area 10cm H x 7 6cm V 4 H x 3 V Mounting Quick Disconnect Mount Unit Size 19 4cm H x 20cm W x 11cm D 7 H x 7 W x 4 D Transducer Standard XT 6 24 Transducer Cable Length 6 metres 20 Depth Ranges 5 10 20 40 60 80 110 150 185 metres 15 30 60 120 180 240 360 480 600 Zoom Ranges 2 5 10 15 20 28 38 46 metres 7 15 30 45 60 90 120 150 ...

Page 34: ...www reelschematic com www reelschematic com ...

Page 35: ...stallation DO NOT LET DEADRISE INTERSECT THIS LINE PLACE EITHER CORNER ON DEADRISE ANGLE TOP Use 4 0mm drill bit Drill Drill Use this template with transducer mounting bracket 403606 19 3mm www reelschematic com www reelschematic com ...

Page 36: ...www reelschematic com www reelschematic com ...

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