Instruction/ maintenance manual of the product HDS-7M Lowrance electronic
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GPS Mapping Receiver Operations Guide 988-0176-02B HDS-5m & HDS-7m.
Software updates for your unit. Occassionally check the Lowrance website for free software upgrades for your unit. Go to www .lowrance.com for the software upgrades. Select the Down- loads option from the grey menu bar near the top of the Lowrance website homepage.
1 Contents T able of contents Introduct ion ....................................................................................... 3 Get t ing S ta r t ed ................................................................................. 5 T ur ning on t he Unit .
2 Contents Map O ri entat ion ....................................................................................... 4 1 Look A hea d .............................................................................................. 4 1 Char t catego rie s .
3 Introduction Thank you for purchasing from Lowrance, the industry leader in marine technology . This manual is packaged with a Quick Start Guide, Installation Guide, License and W arranty booklet and NMEA 2000 Networks Installation Instructions. If any of these documents are missing, you may acquire them via a free download at www .
4 Introduction Lowrance HDS-5m & 7m ZOUT : Zoom out to see more of the map with less detail ZIN : Zoom in to see less of the map with more detail MOB: Pressing ZOUT and ZIN at the same time will s.
5 Getting Started T urning on the Unit Press the POWER/LIGHT key to turn on the unit. If the unit is not connected to a transducer , the unit will start up in simulator mode. T o turn off the unit, press the POWER/LIGHT key for three seconds. Keypad This unit’ s keypad can be used in two ways.
6 Getting Started Menus This unit has a Settings menu, a Pages screen and several context menus. The Settings menu provides access to the settings menus for the three main operation modes: Chart and Radar . The Settings menu is accessed by pressing MENU twice.
7 Getting Started Entering Letters in T ext Boxes This unit has some features and functions that may require you to enter data in a text box. T o enter data in a text box: Highlight the text box and press 1. ENTER . A keyboard will appear on the screen.
8 Getting Started Blank page.
9 Pages Pages Screen Consists of four page icons that scroll horizontally around the Pages menu. T o view the pages screen, press the P AGES key . Selecting Pages Pressing the keypad left or right will move the page icons around the menu. T o select a page, move the desired page icon to the center of the screen.
10 Pages Data Overlay Data overlay is information you can display on top of the page screen, allowing you to customize each page with desired data. Data Overlay menu Every page option has its own Data Overlay menu. The menu allows you to edit, add or remove overlay data from the display .
11 Pages Edit Mode When a gauge is added to the display it will be shown in edit mode. Analog and bar gauges are shaded in blue when they are in Edit Mode. Digital Gauges will be shown with a blue border . Move or Placing a Gauge The Move gauge command allows you to move data overlay to any position on the screen.
12 Pages T o select data overlay: 1. Highlight Select data on the Congure menu. The Select Data menu will appear . Use the keypad to select the desired category and press 2. ENTER . A list of subcategories will appear . Select the desired subcategory and press 3.
13 Pages Limits Controls the number scale used on data overlay gauges and selects warning thresholds. Changing the limits on an analog or bar gauge removes unnecessary numbers from the gauge, making them easier to read. W arnings help you stay within selected warning thresholds.
14 Pages Conguration menu Allows you to Add/Remove sources and adjust Bezel, Caption and Invert T ext Settings. Other conguration menu options are covered previously in the section. T o access the Conguration menu, highlight Conguration on the Edit Overlay menu and press ENTER .
15 Pages Chart Page Consists of a Map that moves in real time as you move. By default, the map is shown from a birds-eye view with North at the top of the screen. This page has three map orientation options (North Up, T rack Up & Course Up) and two ways to view the map: 2D and Shaded Relief (only available on select models).
16 Pages Radar Page Displays the PPI (Position Plan Indicator) screen, Range Rings and the cursor . The PPI can be shifted to show more of a desired portion of the screen (Look Ahead, Center & Of fset) and the color palette can be changed to show returns in white, yellow , black or green.
17 Pages Data menu Controls Info page data, page layout and data display format selection. T o access the Data menu, press MENU while on the Info page. Dash 1, Dash 2 and Dash 3 Info Page dashboard templates that vary in page layout and in the num ber of ga uges su ppo rte d.
18 Pages To edit gauge display: Use the keypad to select the gauge you want to 1. edit and press ENTER . The Select Data menu will appear . Use the keypad to select a data category and press 2. ENTER . A list of subcategories will appear . Select the desired subcategory and press 3.
19 Pages T o select data: Highlight 1. Select Data from the Edit Data menu and press ENTER . The Select Data menu will appear . 2. Use the keypad to select the desired category and press ENTER . A list of subcategories will appear . Select the desired subcategory and press 3.
20 Pages To Finish Editing: Select 1. Finish Edit from the Edit Data menu and press ENTER . A conrmation message will appear . Select 2. Save and press ENTER . Change Layout Controls the gauge layout of dashboard templates and customized dashboards.
21 Pages T o remove dashboards: Select the number of the dashboard you want to 1. delete from the numerical dashboard list. Highlight 2. Remove Dashboard and press ENTER . A conrmation message will appear . Select 3. Delete and press ENTER . Settings Opens the Settings menu.
22 Pages T o copy data les/sonar logs: 1. Highlight Files from the Utilities menu and press ENTER . Select the desired File category and press the keypad to the right. A 2. list of subcategories will appear . Select a subcategory and press the keypad to the right.
23 Pages Displaying Combo Pages Y ou can display multiple pages at the same time by scrolling the desired page’ s icon to the center of the screen and then choosing a secondary page from the list of combo page display options. T o display a combo page: Use the keypad to select the rst page for the combo 1.
24 Pages Adjust Panel Sizes Controls the size of panels when combo pages or multi-panels displays are in use. Adjusting the size of the panels, allows you to emphasize the panel you want to see more clearly . Panels can only be adjusted left/right, so the panels on the side with the split view can not be adjusted vertically .
25 Chart Displaying the Chart page Access the Chart page from the Pages menu. Chart page (2D Chart mode) Point of Interest (POI) Cursor coordinates W aypoint Map scale Cursor Current position icon Chart orientation indicator T o access the Chart page, press the Pages key to bring up the Pages menu.
26 Chart The previous image shows some of the dif ferent items you will see when viewing the Chart page: • Point of Interest (POI): A position on the Chart page represented by a symbol or character . Cursor: • Used to view specic areas on the Chart page, select POIs, create waypoints and measure distances.
27 Chart Find: • Opens the Find menu. From the Find menu you can search for items by select categories. Info: • Shows a list of items close to the cursor . Measure: • Used to measure the distance between current position and another point on the Chart page or between two different points.
28 Chart W aypoints A wayp oint is the lat itu de and longi tude of a speci c posit ion on the ear th' s sur face . Y ou can quickly create a waypoint at your current position or you can create a way- point at the cursor's position on the Chart page.
29 Chart T o Navigate to a Waypoint from the W aypoints screen: From the Pages screen select 1. W aypoints, routes, trails , press ENTER . When the W aypoints screen appears select the waypoint you want to navigate to from the waypoints list and press MENU .
30 Chart W aypoints screen menu T o open the W aypoints screen menu, press the MENU key from the W aypoints screen. The following features are listed in the order they appear in the W aypoints screen menu, top to bottom: Edit: • Opens the Edit Waypoint menu.
31 Chart W aypoints screen, Sort Waypoints feature Y ou can choose how waypoints are sorted in the W aypoints list by selecting Sort from the W aypoints screen list menu. W aypoints can be sorted by Name , Nearest or Icon . By default the unit stores waypoints by name.
32 Chart • Description: Input additional way - point information. Display: • Cho ose how a way poi nt will be displayed on Chart page. Depth: • Select waypoint depth. • Alarm Radius: Inpu t dista nce that sounds alarm when near a specic waypoint.
33 Chart Edit W aypoint icon and color Y ou can change the default waypoint icon and color from the Edit W aypoint menu. Routes Routes make it easier to plan trips to desired destinations and backtrack to a previous location. A route is a series of waypoints linked together to mark a course of travel.
34 Chart Repeat Step 2 until you have set all the desired waypoints along 1. the route. Press the 2. MENU key to open the Edit route menu. Select Save and press ENTER . The route will be saved to the Routes screen. From the Routes screen highlight the route and select 3.
35 Chart Routes screen T o view stored routes go to the Routes screen in the Utilities page. From the Routes screen you can view and edit stored routes. Routes screen menu From the Routes screen menu you can create a new route, edit a route or start a route.
36 Chart T o Edit Route: From the Routes screen select 1. the route to be edited and press ENTER . The Edit Route screen will appear . From the Edit Route screen you 2. can edit the route name, display and waypoints in the route. Use the Arrow keypad to select 3.
37 Chart T o Search for Route by Name: From the Routes screen press 1. MENU . The Routes screen menu will appear . From the Routes screen menu select 2. Find . A keypad will appear . Use the keypad to enter the name of the route you are searching for and press OK .
38 Chart T rails screen menu From the Trails screen menu you can create a new trail, edit a trail or delete a trail. T o open the Trails screen menu, press the MENU key from the Trails screen. The following features are listed in the order they appear in the T rails screen menu, top to bottom: Edit: • Ope ns the Edit T rai l menu.
39 Chart Edit T rail menu The Edit Trail menu is used to edit trail settings and coordinates. Use this menu to change the trail name, trail color and description of a trail. T o edit a Trail name: From the T rails screen 1. select the trail to be edited, press ENTER .
40 Chart Measuring Distances on Chart page Use the Measure feature from the Chart menu to measure distances between your - self and another location on the Chart page or between two different points. T o select/deselect Measure feature: From the Chart page press the 1.
41 Chart T o view a list of specic Chart POI search options select Category from the Find - Chart Items screen. A drop down list will appear . Select the specic category from the drop down list. Map Orientation T o change Chart page orientation: From the Chart page press the 1.
42 Chart From the Chart options submenu select or deselect 2. Look Ahead to turn this feature on or off. Chart categories Use the Chart Categories screen to control what you want to see on the Chart page. T o select / deselect Chart Categories: From the Chart page press 1.
43 Chart Chart page Icons, Tides and Currents Use the cursor on the Chart page to view detailed information about selected icons, including T ides and Currents. The image, at left, shows a Current icon selected on the Chart page. T o view detailed information about an icon, press the MENU key then select Info from the Chart menu.
44 Chart Radar Options The Radar Options menu appears when Radar Overlay is tuned on. It allows you to customize the radar overlay settings from the Chart Page. T o access the Radar Options menu, select Radar Options from the Chart menu and press ENTER .
45 Chart Navionics Settings menu Use to customize the way Navionics data will be displayed on the Chart page, allow- ing you to adjust the features best suited for your shing conditions. T o change Navionics Settings: Select 1. Chart options from the Chart menu and press ENTER .
46 Chart T exture Type • — Enables (on) or disables (off) the 3D shading feature. Photo overlay allows you to enable (full) or disable (off) the aireal photog- raphy overlay chart feature. Annotation • — All ows yo u to di spl ay "M ain " name s (i.
47 Radar T o access the Radar Page: Press the 1. P AGES ke y . Use the keypad to select the 2. Radar Icon and press ENTER . Radar menu Use the Radar menu to make adjustments to radar display settings and features that not only change the appearance of the display , but also make navigation easier .
48 Radar Radar State Controls radar transmission modes: Off, Transmit and Standby . Off turns off the radar . T ransmit broadcasts a radar signal and standby leaves the radar on, but does not broadcast a signal. T o select Radar State: Press 1. MENU , highlight Radar State and press ENTER .
49 Radar Sea Clutter Allows you to select the Sea Clutter adjustment mode — Auto or Manual. If you make changes to Sea Clutter when it is in auto mode (Harbor or Of fshore), Sea Clutter will switch to Manual mode.
50 Radar Position Y ou can move the PPI (Plan Position Indicator) to dif ferent locations on the radar display . There are three Position options: Center , Look Ahead and Offset . T o change the PPI position: Select Position from the Radar menu and press enter .
51 Radar Symbology Used to turn on/off symbols displayed on the PPI screen, including range rings, range markers and compass overlay . Rather than turn off each display feature individually , the Symbology feature allows you to remove them all at once.
52 Radar EBL/VRM menu Places selected Electronic Bearing Line and V ariable Range Marker on the display . T o select an EBL/VRM: Press the 1. MENU ke y . Use the keypad to select the 2. EBL/VRM an d press ENTER . Use the keypad to move the EBL and increase/ 3.
53 Radar Cursor position window When the cursor is active on screen the Cursor position window appears in the bottom left corner of the Radar page. Radar Overlay Radar Overlay places radar returns on top of the map on the Chart Page.
54 Radar Blank page.
55 Settings The Settings Menu provides access to installation and advanced conguration settings for your unit. T o access the Settings menu, press MENU twice.
56 Settings T o change T ext Size: Highlight 1. T ext Size from the System menu and press ENTER . Use the keypad to select the desired text size and press 2. ENTER . Key Beeps By default, a tone (key beep) will sound when any key is pushed on the unit.
57 Settings Datum A model of the earth’ s surface based on a network of surveyed ground features (points). This unit’ s default datum is WGRS-84. T o select a Datum: Select 1. Datum from the Chart settings menu and press ENTER . Use the keypad to select the desired datum.
58 Settings Satellites Monitors the location of satellites in view and the quality of the unit’ s satellite lock- on. The Satellite page has two display options. The Satellite screen displays a circular graphic that shows where satellites are located and a bar graph that monitors the strength of satellites within range of your unit.
59 Settings Screen Capture Saves images of your unit’ s screen to your unit. That allows you to capture images of everything from underwater structure and sh to routes, map areas and radar targets. T o take a screen capture: Select 1. Screen Capture from the System menu and press ENTER .
60 Settings Restore Defaults T o switch the unit back to the settings it had when you purchased it (default settings), use the Restore Defaults command. Reset Defaults will reset the unit to default settings. T o Restore Defaults: Highlight 1. Restore Defaults on the System menu and press ENTER .
61 Settings T o adjust Waypoint, Hardware, Flywheel and Radar settings : Open the desired setting (—). 1. Highlight the setting information and 2. press Enter to turn it on/of f. The center circle will be lled when the setting is on; empty when it is turned off.
62 Settings Chart Settings Menu Contains Chart settings ranging from display options like Range Rings and Grid Lines to map settings like Chart Data and Datum. T o access the Chart Settings Menu: Press 1. MENU twice. Highlight 2. Chart and press ENTER .
63 Settings T o use Heading Extension : Highlight 1. Heading Extension from the chart menu and press ENTER . Select the desired time interval and press 2. ENTER . Popup Information T urns on information windows that appear when the cursor is centered on a point of information.
64 Settings Routes T urns on/off route display properties. When several routes are on the display , turning off routes will give you a better view of the map. T o turn on/off route display properties, select Routes from the Chart menu and press ENTER .
65 Settings Radar Settings Menu Controls Radar options and display settings like T arget Expansion, Orientation and Bearings. T o access the Radar settings menu: Press 1. MENU twice. Select 2. Radar and press ENTER . T arget Expansion Increases the size of radar tar gets, making them easier to see on the radar display .
66 Settings Orientation Controls the way the map moves in relation to the movement of your vessel. That allows you to select a desired method for viewing your surroundings on the radar display . • Course Up — map stay s at same orie nta tion as the initi al beari ng to the selected waypoint.
67 Settings Range Rings Allows you to quickly estimate the distance from your vessel to a another radar target. T o turn on/off Range Rings, highlight Range Rings on the Radar Settings menu and press ENTER . Range Markers Located below each Range Ring, Range Markers display the distance from your position to each range ring.
68 Settings T o set T/M or R: Press 1. MENU twice. Select 2. Radar and press ENTER. Highlight 3. Bearings and press ENTER. Use the arrows to select a bearing and press 4. ENTER . Installation Provides access to the Radar Installation menu. T o access Radar Installation menu: 1.
69 Settings Bearing alignment Used to align the bow of your vessel with the heading line (zero point). Bearing alignment is also referred to as zero bearing. T o make adjustments to bearing alignment, switch the radar state to T ransmit and set radar orientation to Heading Up.
70 Settings Range offset Eliminates the time lag between real radar returns and the time it takes data to be processed by the radar software. Range Offset is also referred to as zero range and trigger delay . T o Adjust Range Of fset: Use the 1. ZOOM IN / ZOOM OUT keys to set range to 1/8 nm.
71 Settings Open Array Park Angle When an open array antenna is turned off, the antenna’ s momentum will cause it to continue rotating before coming to a stop. Open array park angle allows you to adjust the antenna’ s parking angle so it will stop in a desired position.
72 Settings Fuel Used to input fuel data like engine/tank conguration, fuel tank capacity and engine calibration. Y our unit uses that data to calculate the overall fuel performance of your vessel. T o access the Fuel menu, select Fuel from the Settings menu and press ENTER .
73 Settings T o set tank to full: Highlight the 1. Set to full checkbox on the Refuel screen and press ENTER . Highlight 2. OK and press ENTER . The calibration options screen will appear . Y ou are ready to calibrate. T o calibrate engine(s): With the calibr ation options screen displayed, select the checkbox 1.
74 Settings Fuel Used Data information screen that displays fuel consumption data including fuel used since last ll up, fuel used on the current trip and fuel used during a season. T o access fuel used information, select Fuel Used from the Fuel menu and press ENTER .
75 Settings Engine/T ank Conguration Used to input the number of engines and fuel tanks on your vessel. Y our unit must have that information to be able to calibrate you engine(s). T o select engine-tank conguration: Highlight the vessel conguration drop-down 1.
76 Settings Alarms This unit has alarms covering everything from depth and water temp rate to fuel and waypoint radius. The alarms list has three tabs: Active, History and Settings.
77 Settings T o silence an alarm: When an Alarm is triggered, a tone will sound and a alarm window will appear on the screen. Press ENTER to silence the alarm and close the alarm window . After alarm is silenced its corresponding alarm bell will continue to ash in the bottom left corner of the screen.
78 Settings T rails Controls the way trails are logged (updated). T rails mark your movement as you travel, placing points along your path using one of three logging types: T ime, Distance or Auto. Y ou can save up to 10 trails with up to 9,999 points per trail.
79 Settings Time Period Controls how much time will pass before a point is placed along the trail. T o set Time Period: Highlight 1. T ime Period and press ENTER . The distance period keypad will appear . Input the desired distance and select 2. OK . Press ENTER .
80 Settings Network Controls network conguration, data sources, serial port settings, waypoint sharing and allows you to monitor network performance (NMEA 2000 and ethernet) and network devices. T o access the Network menu, select Network from the Settings menu and press ENTER .
81 Settings Data Source menu Allows you to change the name and scope of a source and add/remove sources from a NMEA 2000 or ethernet network. T o access a Data Source menu, highlight a desired source and press MENU . Rename Used to rename a Data Source.
82 Settings T o select a scope: Highlight 1. Scope on the selected device’ s data source menu and press ENTER . Use the keypad to select 2. Global or Local and press ENTER . Reset Global and Reset Local Selecting Reset Global will reset all the source selections to default settings and removes all instances on all networked HDS units.
83 Settings Device Menu Options Details Accesses the Device Information screen Refresh Refreshes the device list Sort Allows you to sort device list by Model ID or Serial No.
84 Settings T o congure device location: Select a device from the device list and press 1. ENTER . The Device Information screen will appear . Highlight the 2. Congure button and press ENTER . The Device Conguration screen will appear . Highlight the 3.
85 Settings Diagnostics Displays diagnostic information on NMEA 2000 networks displays the status of information shared between units (UDB). From the UDB tab, you also can select a unit to be used as the master (primary) unit when sharing information.
86 Settings Serial Ports Congures communication ports to send or receive data with another electronic device, like an autopilot. T o congure serial ports: Highlight 1. Serial Ports on the Network menu and press ENTER . The Serial Settings menu will appear .
87 Settings V essels Controls settings used to monitor vessels in your area with an AIS receiver . The V essels feature makes it easier to navigate safely through high trafc areas. T o access the V essels menu, select V essels from the Settings menu and press ENTER .
88 Settings Course Extension A line extending from each vessel on the chart screen used to estimate where a vessel will be in a selected amount of time, if it maintains its current course. T o use Course Extension: Select 1. Course Extension from the V essels menu and press ENTER .
89 Settings Simulator Accesses all simulation types including default demo and simulator modes as well as advanced custom simulations. T o access the Simulator menu, highlight Simulator on the Settings menu and press ENTER . Simulate T urns on/off your unit’ s simulator .
90 Settings Source Files Controls source les used in radar, sonar , AIS (Chart) and W eather simulations. Source les allow you to use your own data while running a simulation. T o select a source le: Highlight the desired source le option on the Advanced menu and press 1.
91 Settings Route Allows you to select a route to be used during a simulation. T o select a route: 1. Select Route from the Advanced menu and press ENTER . A Route List will appear . Use the keypad to select the desired route and press 2. ENTER . Set Start Position Sets the starting point of a GPS Simulation to the cursor position.
92 Settings Blank page.
93 Unit Care Specications GENERAL Case Size: HDS-5 • : 5.8” H x 7.3” W x 4” D (14. 6 x 1 8.4 x 10.2 cm), 2.30 lbs HDS-7 • : 6.4 ” H x 8.8 ” W x 3.5 ” D (16. 3 x 22. 4 x 8.8 cm), 3.10 lbs Display: HDS-5 • : 5.0” (12.7 cm) diag onal high cont rast 16-bit color TFT , 480 x 480 pixel resolution HDS-7 • : 6.
94 Specications Cleaning the Screen — • W arm water and soap will work ne. Y ou can also use ammonia-type cleaners like W index. Do not use any type of abrasive cleaners. They will remove the Anti-Reection coating from the glass. Inspect the buttons — • Make sure that no buttons are stuck in the down position.
95 T roubleshooting If your unit is not working, or if you need technical help, use the following troubleshooting section before contacting the customer service department. Check the power cable’s connection at the unit. 1. Make sure the power cable is wired properly .
96 T roubleshooting bubbles. (See the Installation Section for how to install the transducer .) When attaching a transducer to the inside of a hull, ONL Y 3. use epoxy available from LEI (see inside back cover for or - der information). Do NOT use RTV silicone rubber adhesive or any other type 4.
97 T roubleshooting transducer cables away from other electrical wiring on the boat. When trolling over weed beds in 20ft of water or less, you 3. may experience vertical bars, loss of the chart picture, or the digital depth. First, do a soft reset of the unit.
98 T roubleshooting to 60ft or whatever depth you expect the sh to appear at. This will maximize the screen resolution to show small ob - jects larger on the screen. It unlikely you will see average- sized sh display as arches in a 100ft deep water column.
99 T roubleshooting When no noise appears on the sonar unit after all of the 5. above tests, then the noise source is probably cavitation. Many people make sonar installations which function per - fectly in shallow water , or when the boat is at rest.
100 T roubleshooting Before purchasing a pre-loaded mapping card for a unit, 1. go to our Mapping Index at http://www .lowrance.com/Prod - ucts/Mapping/default.asp Click on the type of card you are interested in and look at the list of units that are compatible with that card.
101 T roubleshooting should be nothing around or above the antenna. However , GPS antennas can receive signals well through many types of glass and fabric. It is recommended to try various loca - tions before making a permanent installation. If you are using a NMEA 2000 network, both branches of the 3.
102 T roubleshooting Highlight FORCE ST A TUS UPDA TE and press ENT . Pay attention to the RX/TX buttons. c. If the TX is not lighting up then either you do not have the com port set to RADAR or the GPS unit is defective. V erify that the Com Port is set properly , if it is then the Lowrance unit will need to be sent in for repair .
103 Index Index Symbols 2D and Shaded Relief 42 A Add Dashboard 20 Add Source 14 Adjust 52, 69, 70, 71 Alarm 76 Antenna Height 70 Auto Gain 48 B Backlight 5 Bearing alignment 69 Bearings 67 Bezel 14 C.
104 Index configure Limits 19 Finish Editing 20 remov e a source 19 remov e dashboard 21 Interference Rejection 49 In vert T ext 14 K K ey Beeps 56 K eypad 5 L Language 5, 55 Limits 13 Look Ahead 50 .
105 Index remov e waypoints 36 search by name 37 Routes screen 35 Routes screen menu 35 S Satellites 57 Screen Capture 58 Sea Clutter Harbor 49 Manual 49 Of fshore 49 Search by coordinates 40 Select D.
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An important point after buying a device Lowrance electronic HDS-7M (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Lowrance electronic HDS-7M yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Lowrance electronic HDS-7M - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Lowrance electronic HDS-7M you will learn all the available features of the product, as well as information on its operation. The information that you get Lowrance electronic HDS-7M will certainly help you make a decision on the purchase.
If you already are a holder of Lowrance electronic HDS-7M, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Lowrance electronic HDS-7M.
However, one of the most important roles played by the user manual is to help in solving problems with Lowrance electronic HDS-7M. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Lowrance electronic HDS-7M along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
