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Garmin GNC 255 Pilot's Manual

Other manuals for GNC 255: Installation Manual
Manual is about: TSO Installation Manual

Summary of GNC 255

  • Page 1

    Gnc 255a/255b pilot’s guide.

  • Page 2

    © 2012 garmin ltd. Or its subsidiaries. All rights reserved. This manual reflects the operation of system software version 2.00, or later. Some differences in operation may be observed when comparing the information in this manual to later software versions. Garmin international, inc., 1200 east 151...

  • Page 3: Limited Warranty

    I 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide limited warranty all garmin avionics products are warranted to be free from defects in materials or workmanship for: two years from the date of purchase for new remote-mount and panel-mount products; one year from the date of purchase for new ...

  • Page 4

    Ii garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A warning: for safety reasons, gnc 255 operational procedures must be learned on the ground. Caution: the garmin gnc 255 does not contain any user-serviceable parts. Repairs should only be made by an authorized garmin service center. Unauthoriz...

  • Page 5

    Iii 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide note: canadian installations: in accordance with canadian radio specifications standard 102 (rss 102), rf field strength exposure to persons from an antenna connected to this device should be limited to 60 v/m for controlled environment and ...

  • Page 6

    Iv garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A note: this device complies with part 15 of the fcc limits for class b digital devices. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmfu...

  • Page 7

    V 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide product registration and support help us better support you by completing your online registration today! Have the serial number of your product handy and connect to the garmin web site (www.Garmin.Com or https://fly.Garmin.Com/fly-garmin). Lo...

  • Page 8: Record Of Revisions

    Vi garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A record of revisions part number revision date description 190-01182-01 a 11/19/12 initial release.

  • Page 9: Contents

    Vii 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide contents product registration and support ......................................................................V 1 getting started ....................................................................................1-1 1.1 product descripti...

  • Page 10

    Viii garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 3 functions ..............................................................................................3-1 3.1 functions description ........................................................................... 3-1 3.2 com frequencies .......

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    Ix 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 3.6.3 viewing timers in the com display ....................................... 3-24 4 appendix ..............................................................................................4-1 4.1 troubleshooting ...............................

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  • Page 13: Getting Started

    1-1 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 1 getting started 1.1 product description combining a powerful vhf communications transceiver with 200 channel vor, localizer and glideslope receivers, the gnc 255 provides a full-functioned navigation and communications solution in a small ...

  • Page 14: 1.2 Pilot Controls

    1-2 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 1.2 pilot controls the gnc 255 controls have been designed to simplify operation of the system and minimize workload and the time required to access sophisticated functionality. Controls are comprised of dual concentric knobs for frequency t...

  • Page 15: 1.2.3

    1-3 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 1.2.3 tuning large/small concentric (cursor) knobs the large right and small right knobs are used for tuning frequencies and data entry. Small, inner knob large, outer knob 1.2.4 flip/flop key press and release the flip/flop key to switch be...

  • Page 16: 1.2.11  Mon (Monitor) Key

    1-4 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 1.2.10 func (function) key the func (function) key accesses function categories for the following: the com radio, nav radio, ics configuration, system configuration, and timer. Pressing the func key once displays the function mode. Pressing ...

  • Page 17: Basic Operation

    2-1 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 2 basic operation 2.1 power on turn the gnc 255 on by either turning the power/com volume/ squelch knob clockwise to turn the power on or, if installed, turning on the master switch that powers the radios. 2.2 com radio 2.2.1 selecting a com...

  • Page 18: 2.2.2

    2-2 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 2.2.2 monitoring the standby com channel the frequency monitoring function allows you to monitor the standby frequency for activity, while listening to the active frequency. Press the mon key in the com function to listen to the standby freq...

  • Page 19: Frequency Type Symbol

    2-3 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 5. Turn the large knob to select the waypoint type. 6. Turn the small knob to select the type from the list. Selected wpt type figure 2-4 com user frequency type selection frequency type symbol description twr tower gnd ground atis automatic...

  • Page 20: 2.2.4

    2-4 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 2.2.4 com database look-up 1. Press the cursor knob from the com display to activate the database look-up function. Identifier field active for selection turn large knob to move cursor turn small knob to select character figure 2-5 database ...

  • Page 21: 2.2.6 Emergency Channel

    2-5 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 2.2.6 emergency channel 1. Press and hold the flip/flop key or the com remote transfer (com rmt xfr) key for approximately two seconds. Figure 2-9 emergency channel 2. The emergency channel will be inserted into the active frequency position...

  • Page 22: 2.3 Nav Radio

    2-6 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 2.3 nav radio 2.3.1 selecting a nav frequency the selection of nav frequencies is the same as for the com frequencies. 1. Press the c/n key to reach the nav radio function. The nav annunciator on the top line of the display will show. 2. Tur...

  • Page 23: Frequency Type Symbol

    2-7 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 5. Turn the large knob to select the waypoint type. 6. Turn the small knob to select characters. 7. Turn the large knob to move the cursor. Figure 2-12 nav user frequency type selection 8. After selecting the desired characters, press ent. F...

  • Page 24: 2.4 Obs Mode

    2-8 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 2.4 obs mode if your system is configured with an external cdi/hsi, the obs radial of your remote display will be decoded and displayed on the screen of the gnc 255. Note: the identifier is the decoded nav identifier from the morse code broa...

  • Page 25: 2.5

    2-9 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 2.5 distance/speed/time (dst) display when the gnc 255 has received data from an external device, such as a gps receiver or dme sensor through the serial port, dst data will be available. If you are not connected to an external sensor, you w...

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  • Page 27: 3 Functions

    3-1 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 3 functions the functions section allows provides information about com frequencies, nav frequencies, internal communications system (ics) configuration, system configuration (sys), and timers (tmr). 3.1 functions description timers count do...

  • Page 28: 2.   Turn The Large

    3-2 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 1. Press the func key to access the functions. 2. Turn the large knob to select the com, nav, ics, or sys functions. 3. Turn the small knob to view the choices in each function. 4. Press the ent key to access the function. 5. Press the func ...

  • Page 29: 3.2.2.1

    3-3 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 3.2.2 com user frequencies fifteen com user frequencies can be saved with an assigned waypoint (wpt) identifier and type. Note: when switching from 8.33 khz to 25 khz mode, any 8.33 khz- specific user frequencies will be deleted from the use...

  • Page 30: 3.2.2.3

    3-4 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 2. Press the ent key to confirm deletion of the displayed frequency. 3.2.2.3 editing a com user frequency 1. Press func. Turn the large knob to reach the com functions and then turn the small knob to select the com user frequencies. Press en...

  • Page 31: 3.  Turn The Large

    3-5 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 3.2.3 com database frequencies the gnc 255 contains a large database of com frequencies that may be recalled by identifier. Turn large knob to move cursor turn small knob to select character figure 3-9 com database frequencies 1. Press func ...

  • Page 32

    3-6 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 3.2.4 com nearest airports (apt) the 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 f...

  • Page 33: Frequencies

    3-7 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 3.2.5 com nearest area control center (acc) frequencies the gnc 255, when interfaced with an appropriate gps receiver, will report the 25 nearest area control center (acc) frequencies. Accs are also known as air route traffic control centers...

  • Page 34: Frequencies

    3-8 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 3.2.6 com nearest flight service station (fss) frequencies the 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 freque...

  • Page 35

    3-9 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 3.2.7 com nearest weather (wx) frequencies the gnc 255, when interfaced with an appropriate gps receiver, will report the 25 nearest weather (wx) frequencies. Turn small knob to scroll through available frequencies figure 3-14 com nearest we...

  • Page 36: 3.3 Nav Frequencies

    3-10 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 3.3 nav frequencies the nav frequencies category in the functions section contains remotely acquired frequencies (remote), recently used frequencies (recent), user-defined frequencies (user), and a database of all frequencies provided in th...

  • Page 37: 3.3.2.1

    3-11 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 3.3.2 nav user frequencies up to 15 nav user frequencies can be saved with an assigned waypoint (wpt) identifier and type. 3.3.2.1 viewing the nav user frequency 1. Press func to access the functions. Turn the large knob to select the nav f...

  • Page 38: 3.3.2.3

    3-12 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 3.3.2.3 editing a nav user frequency 1. Press func. Turn the large knob to reach the nav functions and then turn the small knob to select the nav user frequencies. Press ent. Figure 3-18 nav user frequency function 2. Turn the small knob to...

  • Page 39: 2.  Turn The Large

    3-13 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 3.3.3 nav database frequencies the gnc 255 contains a large database of nav frequencies that may be recalled by identifier. 1. Press func to access the functions. With the nav frequency function highlighted, turn the small knob to view the ...

  • Page 40: Duplicate Identifiers

    3-14 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A duplicate identifiers 1. When duplicate identifiers are found, press ent. Duplicate identifiers found press the ent key to save the displayed value press the clr key to return to the previous menu figure 3-23 selected nav database frequency...

  • Page 41: 3.4 Ics Configuration

    3-15 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 2. Turn the small knob to display the available vors. 3. Press the ent key to accept the displayed vor and set it as the standby frequency. Or, press the clr key to return to the functions display. 3.4 ics configuration the internal communi...

  • Page 42: 3.4.2

    3-16 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 3.4.2 aux audio the aux function allows you to turn aux audio on/off and set the volume value. 1. Press func to access the functions. Turn the large knob to select the ics function. Turn the small knob to view the aux volume function. Then,...

  • Page 43: 3.4.3 Intercom On/off

    3-17 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 3.4.3 intercom on/off the intercom on/off function 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...

  • Page 44: 3.5

    3-18 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 3.5 system configuration the system configuration function will show the software version, database info, and serial number as well as, allowing you to set values for the com spacing, display brightness, and display contrast, and use the lo...

  • Page 45: 3.5.2 Display Brightness

    3-19 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 3.5.2 display brightness as it arrives from the factory, the gnc 255 automatically adjusts its display brightness for the current lighting conditions. A small sensor on the display is used for this function. A manual adjustment is available...

  • Page 46: 3.5.3

    3-20 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 3.5.3 display contrast the display contrast has a range from -50 (low display contrast) and 50 (high display contrast) with 0 as the default. The range can be adjusted by using the small knob to adjust the value. 1. Press func to access the...

  • Page 47: 3.5.5

    3-21 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 3.5.5 load database the gnc 255 has a usb connector to allow for easily updating the system databases. Note: garmin recommends the use of a usb 2.0 compatible usb flash drive for updating the database. 1. Insert the supplied cable into the ...

  • Page 48: 3.5.6

    3-22 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 5. Wait until the updating process is complete and then remove the memory device and cable. The unit will reset automatically once the database is updated. 6. Verify the correct frequency database is loaded after power-up. 3.5.6 software ve...

  • Page 49: 3.6 Timers

    3-23 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 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 running. 3.6.1 setting up the co...

  • Page 50: 3.6.2

    3-24 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 3.6.2 setting up the count up timer 1. Press func to access the functions. Turn the large knob to select the timer (tmr) function. Turn the small knob to select the count up timer function. Now, press the ent key. Select count up timer figu...

  • Page 51

    3-25 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide when the count down timer reaches 0:00, it will continue counting as a count up value. The count down timer that is counting up will be highlighted. A count up timer will continue counting separately. Count down timer value highlighted when...

  • Page 52

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  • Page 53: 4 Appendix

    4-1 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide 4 appendix 4.1 troubleshooting if efforts to resolve the problem fail, contact your dealer or the factory for technical assistance. The garmin customer service staff will gladly assist you. Please have the following information ready: •syste...

  • Page 54: Problem

    4-2 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A problem possible cause action gnc 255 does not power on no power to the gnc 255 check power connections, breakers, and main avionics switch faulty electrical wiring or connection contact your dealer to perform electrical system test no nav a...

  • Page 55: Problem

    4-3 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide problem possible cause action display shows “incorrect calibration checksum” at start-up corrupted system calibration parameters contact factory table 4-1 troubleshooting 4.2 updating the frequency database the gnc 255 uses a standard usb me...

  • Page 56: 4.3 Messages

    4-4 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A 4.3 messages when a message has been issued by the unit, the message will be shown on the display. After viewing the messages, touch the ent key to acknowledge the message and return to the previously viewed page. An acknowledged message wil...

  • Page 57: Message

    4-5 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide message description action cooling fan - the cooling fan has failed. The gtn cooling fan is powered, but it is not turning at the desired rpm. Decrease cabin temperature and increase cabin airflow (especially near the gtn) to prevent damage ...

  • Page 58: Message

    4-6 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A message description action remote key stuck - com remote transfer key is stuck. The remote com transfer (com rmt xfr) key/switch has been in pressed position for at least 30 seconds. This input will now be ignored. This input is not availabl...

  • Page 59: Message

    4-7 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide message description action remote key stuck - nav remote transfer key is stuck. The remote nav transfer (nav rmt xfr) key/ switch has been in pressed position for at least 30 seconds. This input will now be ignored. This input is not availab...

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  • Page 61: Index

    Index-1 190-01182-01 rev. A garmin gnc 255a/255b pilot’s guide index a appendix 4-1 b basic operation 2-1 brightness 3-19 c cautions ii, 2-6 clear 1-3 com database frequencies 3-5, 3-6, 3-7, 3-8, 3-9 com frequencies 3-2 com ptt 3-18 com radio 2-1 com;select frequency 2-1 com spacing 3-18 com user fr...

  • Page 62

    Index-2 garmin gnc 255a/255b pilot’s guide 190-01182-01 rev. A r recent com frequencies 3-2 recent nav frequencies 3-10 record of revisions vi registration v remote frequency control 2-5 reverse look-up 2-4 revisions vi s saving a com channel 2-2 saving a nav channel 2-6 serial number 3-22 software ...

  • Page 64

    © 2012 garmin corporation garmin international, inc. 1200 east 151 st street, olathe, kansas 66062, u.S.A. Tel. 913/397.8200 or 800/800.1020 fax 913/397.8282 garmin at, inc. 2345 turner rd., s.E., salem, oregon 97302, u.S.A. Tel. 503/581.8101 or 800/525.6726 fax. 503/364.2138 garmin (europe) ltd. Li...