Humminbird VHF255SW manual No Sound from the Speaker, LOW Receiver Sensitivity

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NO SOUND FROM THE SPEAKER

If your VHF255S speaker is not emitting sound, refer to the Installation section, and make sure that:

•The volume control is turned up high enough for you to hear.

•SQUELCH is set to the threshold point.

•The internal speaker is turned on (see Radio Setup: Turning the Internal Speaker On/Off for more information).

Correct any problems discovered.

TRANSMITTING IS IMPOSSIBLE,

OR HIGH POWER CAN’T BE SELECTED

If your VHF255S cannot transmit, or you cannot select high power, refer to the Installation section, and make sure that:

•Sufficient power is being supplied to the radio (12 Volts @ 7 Amps).

•The PTT key is operating correctly.

•The microphone or MIC jack are operating correctly.

•Change to another channel, as some channels are for low power or are receive only.

•Press the HI/LOW/MEM key to select high power.

Correct any problems discovered.

LOW RECEIVER SENSITIVITY

If your VHF255S either has low receiver sensitivity (has difficulty receiving faint signals), refer to the Installation section, and make sure that:

•The antenna is connected correctly.

•The connection between the coaxial cable and the radio base station is correct and securely-fastened.

Correct any problems discovered.

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Contents Operations Manual Thank YOU Operator Warnings Table of Contents Setup Menu Maintenance Troubleshooting HOW VHF Radio Works VHF255S IntroductionFeatures Overview Page To obtain an Mmsi assignment Maritime Mobile Service Identity MmsiGroup Mmsi VHF255S Controls Radio Base Station Front Page VHF255S Controls Radio Base Station Rear VHF255S Controls Microphone Handset 10 11 Whats on the DisplayDot Matrix Indicates special conditions or radio functions Indicates current channel selectedParts Supplied Installation OverviewRadio Base Station Watt VHF255S Fixed Mount radio base stationMicrophone handset Microphone HandsetCables Connections Overview Decide Where to Install the Radio Base Station Install the Radio Base Station Radio Base Station Mounting Screws Gimbal Knobs Bracket Dash Nuts Recessed mounting brackets Connected to the radio before powering up the radio Install the Microphone Mounting BracketAttach the Antenna Cable to the Radio Mount the microphone onto the bracket Attach a GPS Receiver OPTIONAL-PURCHASE Using Your VHF255S You will need to obtain an FCC license if Before YOU USE Your RadioTo turn on the radio Selecting a Channel Adjusting SquelchTo select a channel Transmitting and Receiving Selecting HIGH/LOW PowerSelecting U.S./INTERNATIONAL/CANADIAN Bands Selecting a Weather Channel and Turning on Weather Alert ADDING/DELETING Channels TO/FROM Memory Accessing the 16/9 Priority ChannelsTo delete channels from memory Using the Transmit TIME-OUT Timer TOT Accessing Channels Saved to MemoryTo access saved channels ScanningTo activate scan modes Using the Watch Monitor Modes To select a DSC call type Digital Selective Calling DSCDSC Call Types Exit Quits the DSC Call Type menu modeGroup Mmsi To make a Group callOpen the red cover over the Distress key Making a Distress CallSay that you will be monitoring Channel Mayday Mayday MaydayMaking Individual Routine Calls 4a. If the call is acknowledged, press PTT to talk Press the CH/ENTER key to initiate the callTo receive a DSC call Receiving CallsTo receive a Distress call To receive an All Ships call To receive a Distress Relay callCall data is stored in the Call Log To receive a Group callTo receive an Individual call To receive a Geographic Area callPosition Indication Resetting the RadioTo acknowledge a missed call Distress 23’20.1234 N 100’15.1002 E 0810PM UTC Setup Menu Contact List To access the Setup MenuTo delete an entry from the Contact List LOCAL/DISTANT Backlight AdjustmentTo adjust the Contrast Contrast AdjustmentGPS/TIME Submenu GPS/TIME Submenu Manually Enter GPS Data GPS/TIME Settings Submenu Position Display ON/OFF GPS/TIME Submenu Settings SubmenuGPS/TIME Settings Submenu Time Offset Local Time GPS/TIME Settings Submenu Time Display ON/OFFGPS/TIME Settings Submenu Time Format Radio Setup Submenu To display an existing channel name Radio Setup Channel Name Display and EditingTo edit an existing channel name entry Radio Setup Ring Volume Adjustment Radio Setup Turning the Internal Speaker ON/OFF Radio Setup Beep Volume AdjustmentTo access the DSC Setup Submenu DSC Setup SubmenuDSC Setup Enter Your User Mmsi Group Mmsi To enter Group MMSIs DSC Setup Create and Manage Group MmsisTo delete a Group Mmsi To edit an existing Group Mmsi entryDSC Setup DSC Enable DSC Setup Individual ReplyDSC Setup Reset DSC Setup Position ReplyTroubleshooting MaintenanceVHF255S Doesnt Power UP No Sound from the Speaker Transmitting is Impossible Or High Power CAN’T be SelectedLOW Receiver Sensitivity Year Limited Warranty Humminbird Service Policy Returning Your Unit for Service Transmitter SpecificationsReceiver Use Marine ChannelsMarine Channels 157.350 161.950 International Marine Channels MHz 156.125 160.725 Canadian Marine Channels Commercial Fishing Only Menu Tree These menu choices appear when you press the DSC/MENU keyDSC Call Type List Setup Menu Page Page Page Monday Friday 800 a.m. to 430 p.m. Central Standard Time Contact Humminbird
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VHF255S, VHF255SW specifications

The Humminbird VHF255SW is an advanced VHF marine radio designed for reliability and performance on the water. It is built for recreational boaters, offering a combination of essential features and cutting-edge technologies that enhance communication and navigation safety.

One of the standout features of the VHF255SW is its robust 25-watt output power, which provides extended range communication, allowing users to reach distant vessels and shore stations effectively. This high power output is crucial in emergency situations or when out on open water, ensuring that skippers can maintain contact when it matters most.

The radio is equipped with a built-in Class D Digital Selective Calling (DSC) capability, which is designed to enhance safety. This feature allows users to send a distress signal automatically to the coast guard and other vessels within the vicinity, including their location coordinates. The DSC functionality can be a lifesaver in case of an emergency, providing peace of mind for boaters.

Another key characteristic of the VHF255SW is its large, high-contrast LCD display, which is easy to read even in bright sunlight or at night. The multi-color display features adjustable backlighting, ensuring users can navigate and communicate effectively in various lighting conditions. The intuitive user interface simplifies operation, making it accessible for even the most novice boater.

Additionally, the Humminbird VHF255SW is equipped with a built-in GPS receiver, which allows for enhanced positioning and mapping capabilities. This integration enables users to access real-time information, making navigation smoother and more efficient. The unit also supports navigating to specific waypoints and routes, making it an excellent tool for fishing and exploring new waters.

The radio is designed with a rugged, waterproof housing that meets IPX7 standards, meaning it can withstand submersion in water for short periods. This durability ensures that it operates reliably in rough marine conditions. The Humminbird VHF255SW also features a noise-canceling microphone for clearer communication, minimizing background noise during transmissions.

In summary, the Humminbird VHF255SW blends important marine communication capabilities with advanced technology. Its combination of high output power, DSC functionality, built-in GPS, and a user-friendly interface makes it an invaluable asset for any boating enthusiast, ensuring safety and confidence on the water. With its rugged design and reliability, the VHF255SW is a smart choice for those who demand quality and performance from their marine radio.
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