Garmin GNC 255 GNC255A/255B Pilot's Guide

Garmin GNC 255 Manual

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  • Garmin GNC 255 | GNC255A/255B Pilot's Guide - Page 1
    GNC 255A/255B Pilot's Guide
  • Garmin GNC 255 | GNC255A/255B Pilot's Guide - Page 2
    , we value your opinion. For comments about this guide, please e-mail: [email protected] www.garmin.com https://fly.garmin.com/fly-garmin Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded or stored in any storage
  • Garmin GNC 255 | GNC255A/255B Pilot's Guide - Page 3
    the purchase price at its service, contact your local Garmin Authorized Service Center. For assistance in locating a Service Center near you, visit the Garmin web site at http://www.garmin.com or contact Garmin Customer Service at 866-739-5687. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide
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    Garmin GNC 255 does not contain any user-serviceable parts. Repairs should only be made by an authorized Garmin service center. Unauthorized repairs or modifications could void both the warranty and the pilot site at www.garmin.com/ prop65. ii Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    persons from an antenna connected to this device should be limited to 60 V/m for controlled environment and 28 V/m for uncontrolled environment. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide iii
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    instructions, may cause harmful interference to radio communications. Furthermore, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference, the user operation. iv Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    in the space provided. If you have any questions, the Garmin Product Support department may be reached Monday through Friday, 7:00 AM to 7:00 PM Central Time. US: 913-397-8200 US Toll Free: 1-866-739-5687 Canada Toll Free: 1-866-429-9296 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide v
  • Garmin GNC 255 | GNC255A/255B Pilot's Guide - Page 8
    Record of Revisions Part Number Revision Date Description 190-01182-01 A 11/19/12 Initial release vi Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
  • Garmin GNC 255 | GNC255A/255B Pilot's Guide - Page 9
    Remote Frequency Selection Control 2-5 2.3 Nav Radio 2-6 2.3.1 Selecting a Nav Frequency 2-6 2.3.2 Saving a Nav Channel 2-6 2.3.3 Listening to the Nav Audio Channel 2-7 2.4 OBS Mode 2-8 2.5 Distance/Speed/Time (DST) Display 2-9 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide vii
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    Display Contrast 3-20 3.5.4 Database Info 3-20 3.5.5 Load Database 3-21 3.5.6 Software Version 3-22 3.5.7 Serial Number 3-22 3.6 Timers 3-23 3.6.1 Setting Up the Count Down Timer 3-23 3.6.2 Setting Up the Count Up Timer 3-24 viii Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    in the Com Display 3-24 4 Appendix 4-1 4.1 Troubleshooting 4-1 4.2 Updating the Frequency Database 4-3 4.2.1 Downloading the Frequency Database 4-3 4.2.2 Updating the GNC 255 Frequency Database 4-3 4.3 Messages 4-4 Index...Index-1 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide ix
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    This page intentionally left blank x Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
  • Garmin GNC 255 | GNC255A/255B Pilot's Guide - Page 13
    ) Volume, Nav ID On/Off Frequency Monitor Key Com or Nav Frequency Selection OBS Selection LARGE and SMALL Knobs (Frequency Adjust) Enter Key Clear Data Key Function Selection To/From Selection Figure 1-1 GNC 255 Front Panel Description 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 1-1
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    in the bottom left corner of the bezel controls audio volume for the Nav radio. Press the Nav Volume/ID knob and the Morse code tones will be heard. When Morse code tone is active, "ID" will appear to the left of the Nav active frequency. 1-2 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    Com/Nav) Key Press the C/N key to select the Com or Nav (VLOC) radio mode. 1.2.6 OBS Key Press the OBS key to see the current OBS setting and graphic CDI. The OBS page will be disabled if the unit is installed Standby frequency. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 1-3
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    function categories for the following: the Com Radio, Nav Radio, ICS Configuration, System Configuration, and update the frequency database in the GNC 255. NOTE: Garmin recommends the use of a USB 2.0 compatible USB flash drive for updating the database. 1-4 Garmin GNC 255A/255B Pilot's Guide
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    Type Shown For The Selected Frequency Asterisk Indicates Multiple Types Exist For The Selected Frequency Figure 2-1 Com Frequency Selection 6. Press and release the FLIP/FLOP key to toggle the Standby frequency to the Active frequency. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 2-1
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    the CLR Key To Revert the Displayed Value to the Previous Value Turn SMALL Knob To Select Character Turn LARGE Knob To Move Cursor Figure 2-3 Com User Frequency Name Selection 4. After selecting the desired characters, press ENT. 2-2 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    CTAF Common Traffic Advisory Frequency FSS Flight Service Station RFS Remote Flight Service Station MF Mandatory Frequency UNI Unicom Blank None Table 2-1 - Com Frequency Type List 7. After making a selection, press ENT. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 2-3
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    are in the database when the unit is receiving a valid position input. Waypoint Types with a "+" sign will have more frequencies for the same type. Airport Identifier Shown For Freqs In Database Figure 2-8 Frequency Database Reverse Look-Up 2-4 Garmin GNC 255A/255B Pilot's Guide 190-01182-01
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    ). The standby frequency isn't activated until a Com FLIP/FLOP switch (either bezel-mounted or remote (COM RMT XFR) is pressed. Remote Frequency Selection only functions on units configured for a remote Com Frequency recall switch. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 2-5
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    ENT. The Waypoint name field will be active. 2. Turn the SMALL knob to select characters. 3. Turn the LARGE knob to move the cursor. Figure 2-11 Nav User Frequency Name Selection 4. After selecting the desired characters, press ENT. 2-6 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    2-12 Nav User Frequency Nav frequency. Figure 2-13 Listening to the ID for a Nav Frequency Nav audio volume is adjusted using the Nav Volume knob. Turn the Nav Volume knob clockwise to increase volume, or counterclockwise to decrease volume. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide
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    displayed on the screen of the GNC 255. NOTE: The Identifier is the decoded Nav Identifier from the Morse code Nav Frequency Identifier Reference Com Frequency OBS Setting To/From Indication for Selected Station CDI Deflection Figure 2-14 CDI Display 2-8 Garmin GNC 255A/255B Pilot's Guide
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    To/From Station Active Nav Frequency Distance To Station DME data sources are connected to the GNC and dashes are displayed when distance/speed/time data is expected to be displayed, press the T/F key to prompt the GNC to display DST data. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide
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    Com Spacing DSPL Brt DSPL Contrast Database Info Load Database Software Ver Serial Number Timers Count Down ENT - Start/Stop CLR - Reset Push CRSR - Settings ENT - Accept Count Up ENT - Start/Stop CLR - Reset Figure 3-1 Functions Diagram 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide
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    the Standby Figure 3-2 Recent Com Frequencies 3. Press and release the FLIP/FLOP key to transfer the displayed channel to the Active frequency position. Press the ENT key to transfer the displayed channel to the Standby frequency position. 3-2 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev
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    this User frequency. Press ENT Key To Delete Selected Freq Active Frequency Press ENT To Confirm Deleting The Selected Freq Selected Frequency Figure 3-4 Deleting User Com Frequencies Position In List. Turn SMALL Knob To Select Entry. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide
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    to select the Waypoint Type field. 6. Turn the SMALL knob to select the Waypoint Type. Select Wpt Type Figure 3-8 Com User Frequency Type Selection 7. After selecting the Waypoint Type, press ENT to accept changes to the User Frequency. 3-4 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    To Select Freq Type Figure 3-10 Selected Com Database Frequency 6. Press and release the FLIP/FLOP key to set the selected frequency as the Active frequency. 7. Press the ENT key to set the selected frequency as the Standby frequency. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-5
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    GNC 255 will report the 25 nearest Airports (APT), when interfaced with an appropriate GPS receiver. Turn SMALL Knob To Scroll Through Available Airports Figure 3-11 Com Nearest APT Frequencies 1. Press FUNC to access the Functions. With the Com Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    return to the Functions display. 4. Press and release the FLIP/FLOP key to set the selected frequency as the Active frequency. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-7
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    GNC 255, when interfaced with an appropriate GPS receiver, will report the 25 nearest Flight Service Station (FSS) frequencies. Turn SMALL Knob To Scroll Through Available Frequencies Figure 3-13 Com frequency as the Active frequency. 3-8 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    return to the Functions display. 4. Press and release the FLIP/FLOP key to set the selected frequency as the Active frequency. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-9
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    Recent), user-defined frequencies (User), and a database of all frequencies provided in the standard default memory (Database). 3.3.1 Recent Nav Frequencies The last 20 Nav frequencies displayed channel to the Standby frequency position. 3-10 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    Active Frequency Position In List. Turn SMALL Knob To Select Entry. Press ENT To Delete The Selected Freq Selected Frequency Figure 3-17 Deleting User Nav Frequencies 2. Press the ENT key to delete the displayed frequency. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-11
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    characters and turn the LARGE knob to move the cursor. Figure 3-19 Nav User Frequency Name Selection 4. After selecting the desired characters, press ENT. 3-20 Nav User Frequency Type Selection 7. After selecting the desired characters, press ENT. 3-12 Garmin GNC 255A/255B Pilot's Guide 190-01182-01
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    As Active Wpt Type Figure 3-22 Selected Nav Database Frequency 6. Press and release the FLIP/FLOP key to set the selected frequency as the Active frequency. 7. Press the ENT key to set the selected frequency as the Standby frequency. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-13
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    Ident from Nav Database 3. Set the 3.3.4 Nav Nearest VOR The GNC 255, Nav Nearest VOR Frequencies 1. Press FUNC to access the Functions. With the Nav Frequency Function highlighted, turn the SMALL knob to view the Nav Nearest VOR function. Then, press ENT. 3-14 Garmin GNC 255A/255B Pilot's Guide
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    Configuration The Internal Communications System (ICS) Configuration allows you to adjust the intercom, set the Nav/Aux volume, turn the Intercom On/Off, and turn the intercom speaker On/Off. 3.4.1 ENT key to save the selected values. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-15
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    Figure 3-30 Adjust Aux Audio 4. Press the CLR key to revert to the previous Volume value and then repeat step 3 to select a new value. 3-16 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    toggles intercom on and off. The intercom can also be toggled on/off with a remote switch, if installed. The Intercom On/ Off function must be set to On to make the Adjust Intercom function available. 1. to save the selected value. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-17
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    the SMALL Knob to Select the Channel Spacing Press ENT to Accept Press CLR to Return to the Selected Value the Previous Value Figure 3-33 Com Spacing Display 2. Turn the SMALL knob to set the Com spacing and then press the ENT key. 3-18 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    adjust the value. The GNC 255 will either control dimming based on the photocell or the lighting bus. This is set in configuration mode during installation and is not selectable by the pilot. 1. Press FUNC to . Then, press the ENT key. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-19
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    select the SYS Function. Turn the SMALL knob to view the Database Version function. Then, press the ENT key. Database Cycle Database Effectivity Date Figure 3-36 Database Info Display 2. Press the FUNC key to return to the main display. 3-20 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    to view the Load Database function. Then, press the ENT key. Figure 3-38 Database Update Display 4. Verify the database version on USB. Then, press the ENT key. Updating will begin automatically. Figure 3-39 Verify Database Version 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-21
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    SMALL knob to view the Serial Number function. Then, press ENT. Figure 3-40 Serial Number Display Unit Serial Number ID Is Used With The flyGarmin Services 2. Press the FUNC key to return to the main menu. 3-22 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    3.6 Timers The GNC 255 has both Count Up and Count Down timers, which may operate simultaneously and are shown in the lower right of the Com/Nav displays. The countdown timer always takes precedence if it is the Count Down Timer Value 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-23
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    . Timer Value Figure 3-46 Timer Value Shown in the Com Display 1. Pressing CLR and then ENT will reset the displayed Timer. Figure 3-47 Stop or Clear the Timer in the Com Display 2. Pressing ENT twice will stop the displayed Timer. 3-24 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    will continue counting separately. Count Down Timer Value Highlighted When Counting Up Figure 3-48 Count Down Timer Value Now Counting Up 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 3-25
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    This page intentionally left blank 3-26 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    Troubleshooting If efforts to resolve the problem fail, contact your dealer or the factory for technical assistance. The Garmin customer service -9296 e-mail: [email protected]. http://www.garmin.com https://fly.garmin.com/fly-garmin 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 4-1
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    On/Off, Adjust Intercom If in Lock Out mode, press the external Com FLIP/FLOP key for two seconds to return to normal operation or cycle the avionics power. If the condition persists, contact dealer. Contact dealer Recalibrate resolver 4-2 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    . Frequency database updates are provided by Garmin and may be downloaded from the Garmin web site https://fly.garmin.com/fly-garmin. 4.2.2 Updating the GNC 255 Frequency Database See Section 3.5.5 for details on updating the database. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide 4-3
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    121.5 MHz. Hold remote com transfer key to exit. The external com remote transfer (COM RMT XFR) switch has been held and the com radio is tuned to 121.5. To exit this mode, hold the com remote transfer (COM RMT XFR) switch for two seconds. 4-4 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev
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    service. Fly an approach that does not use the glideslope receiver (VOR, LOC, GPS). Contact dealer for service. Re-apply power to the unit. Verify the Push To Talk key/switch is not stuck. Contact dealer for service if this message persists. 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide
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    dealer for service if this message persists. Verify the COM CHAN UP key/ switch is not stuck. Contact dealer for service if this message persists. Verify the COM CHAN DN key/ switch is not stuck. Contact dealer for service if this message persists. 4-6 Garmin GNC 255A/255B Pilot's Guide 190-01182
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    . service. The nav radio may continue to function. Contact dealer for service. VLOC RECEIVER - The nav radio is Navigation receiver not communicating has failed. property with the system. Contact dealer for service. Table 4-2 Messages 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide
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    This page intentionally left blank 4-8 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
  • Garmin GNC 255 | GNC255A/255B Pilot's Guide - Page 61
    3-10 Nav ID 1-2 Nav radio 2-6 Nav;Select frequency 2-6 Nav user frequencies 3-11 Nav volume 1-2 Nearest airport 3-6, 3-7 O OBS mode 1-3, 2-8 P Pilot controls 1-2 Power on 2-1 Power-up 3-22 Product description 1-1 Product Support v, 4-1 190-01182-01 Rev. A Garmin GNC 255A/255B Pilot's Guide Index
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    Speaker On/Off 3-17 Squelch 1-2 Stuck mic 2-5 Support v System configuration 3-18 T Timers 3-23 To-From 1-3 Troubleshooting 4-1, 4-4 U Updating frequency database 4-3 USB 1-4, 3-21 User frequencies 3-3, 3-11 V Volume 1-2 W Warranty i Index-2 Garmin GNC 255A/255B Pilot's Guide 190-01182-01 Rev. A
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    2nd Road, Xizhi Dist., New Taipei City 221, Taiwan (R.O.C.) Tel. 886/2.2642.9199 Fax 886/2.2642.9099 Garmin Singapore Pte. Ltd. 46 East Coast Road #05-06 Eastgate Singapore 428766 Tel. (65) 63480378 Fax (65) 63480278 www.garmin.com https://fly.garmin.com/fly-garmin Part Number 190-01182-01 Rev. A
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GNC 255A/255B
Pilot’s Guide