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Troubleshooting

4-2

560-0982-01 Rev A

GNS 480 (CNX80) Installation Manual

Table 4-1. Troubleshooting Guide

Problem Possible

Cause

Solution

The sidetone level is
too low or too high.

•

Wrong type of headsets, or level
needs adjustment.

•

If necessary, adjust the sidetone level.
Sidetone adjustment is found under the
AUDIO menu in the COM function.

Unable to control Nav
using

VOR

bezel key.

•

No power to the nav receiver.

•

Make sure power is connected to the nav
37-pin connector P7-1 and ground to
P7-2.

OBS Resolver won’t
calibrate.

•

Incompatible resolver or improper
connection.

•

Check the resolver specifications and
wiring.

OBS indication on
GNS 480 does not
agree with OBS
setting

•

GNS 480 resolver input not
configured correctly.

•

Resolver has not been calibrated.

•

Check resolver configuration in Ground
Maintenance Mode

•

Calibrate resolver

GNS 480 Message
Audio or Tone not
heard

•

Message audio volume level set
too low

•

Message tone is turned OFF.

•

Audio inhibit line grounded

•

Increase AMA volume level. AMA
adjustment is found under the AUDIO
menu in the COM function.

•

Turn message tone ON via system
configuration page.

•

Verify that inhibit input (P5-77) is not
grounded using Ground Maintenance
Mode.

Unable to control
transponder using

XPDR

bezel key.

•

SL70/SL70R transponder is not
turned on.

•

SL70 is not configured correctly.

•

Wiring connections are incorrect.

•

Turn on transponder

•

Go to serial port setup page and verify
that RS232 port 6 has SL70 set for both
CH 6 RX and CH 6 TX.

•

Check wiring.

GNS 480 not receiving
baro correction data
from MX20.

•

Incorrect configuration used for
serial port to MX20.

•

MX20 software prior to v5.x.

•

Wiring connections are incorrect.

•

Go to serial port setup page and verify
that RS232 port 1 has MAPMX set for
both CH 1 RX and CH 1 TX (only
MX20 version 5.x or later supports the
MAPMX protocol).

•

Update MX20 software.

•

Check wiring

DST data (Distance,
Speed, Time) is not
displayed on the SL30.

•

The GNS 480 is not configured
correctly.

•

The SL30 is not set up for DST
display.

•

Go to serial port setup page and verify
that RS232 port to SL30 is set to SL30
on RX and MAPCOM on TX.

•

Consult SL30 users guide for setup of
DST display.

Содержание GNS 480

Страница 1: ...GNS 480 CNX80 Color GPS Nav Com Installation Manual September 2004 560 0982 01 Rev A...

Страница 2: ...ed transmitted disseminated downloaded or stored in any storage medium for any purpose without the express written permission of Garmin Garmin hereby grants permission to download a single copy of thi...

Страница 3: ...RMATION To receive additional copies of GNS 480 publications order the following part numbers GNS 480 Installation Manual 560 0982 xx GNS 480 Pilot Guide 560 0984 xx GNS 480 Reference Guide 560 0989 x...

Страница 4: ...01 1 7 01 2 26 01 3 23 01 B 3 01 D 24 01 1 8 01 2 27 01 3 24 01 B 4 01 D 25 01 1 9 01 2 28 01 3 25 01 B 5 01 D 26 01 1 10 01 2 29 01 3 26 01 B 6 01 D 27 01 1 11 01 2 30 01 3 27 01 B 7 01 D 28 01 1 12...

Страница 5: ...1 4 4 GNS 480 STC AUTHORIZATION 1 15 1 5 DATABASE UPDATES 1 15 1 6 UNPACKING THE EQUIPMENT 1 16 1 7 PACKAGE CONTENTS 1 17 1 8 LICENSE REQUIREMENTS 1 18 1 9 DEFINITIONS ACRONYMS 1 19 2 INSTALLATION 2...

Страница 6: ...CK 3 1 3 2 EQUIPMENT SETUP AND CONFIGURATION 3 1 3 2 1 SETUP FUNCTION 3 2 3 3 EQUIPMENT OPERATIONAL FUNCTIONAL TEST 3 19 3 3 1 GNS 480 CHECKOUT UTILITIES 3 19 3 3 2 SYSTEM CHECKOUT GROUND CHECKS 3 30...

Страница 7: ...1 CRIMP TOOL FOR P N 162 0082 2 2 TABLE 2 2 CRIMP TOOL FOR P N 245 0027 2 2 TABLE 2 3 INTERFACE CONNECTORS 2 15 TABLE 2 4 CRIMP CONTACT SPECIFICATIONS 2 15 TABLE 2 5 MAIN SYSTEM CONNECTOR PIN OUT P1...

Страница 8: ...2 FIGURE 3 2 SERIAL PORT SETUP PAGE 3 2 FIGURE 3 3 ARINC 429 PORTS SETUP PAGE 3 4 FIGURE 3 4 RESOLVER INTERFACE SETUP PAGE 3 5 FIGURE 3 5 RESOLVER CALIBRATION PAGE 3 6 FIGURE 3 6 ALTIMETER INTERFACE...

Страница 9: ...D 9 FIGURE D 5 RS232 SERIAL INTERFACES INTERCONNECT DIAGRAM D 11 FIGURE D 6 GNS 480 TO SL10 15 AUDIO PANEL INTERCONNECT DIAGRAM D 13 FIGURE D 7 DME TUNING INTERCONNECT DIAGRAM D 15 FIGURE D 8 S TEC AU...

Страница 10: ...Table of Contents viii 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...

Страница 11: ...information Includes INTERCONNECT DIAGRAMS Provides a listing of ACCEPTABLE AIRCRAFT BY EVALUATION for those aircraft that have been evaluated by the FAA Provides a listing of OPTIONAL ACCESSORIES NO...

Страница 12: ...PS Nav Com 1 2 1 FEATURES The features of the GNS 480 Color GPS Nav Com include 10 36 VDC Power Capability Sunlight readable 256 color 3 8 diagonal LCD display GPS WAAS engine for state of the art fas...

Страница 13: ...CES The interfaces for a typical single GNS 480 avionics stack are shown in Figure 1 2 while the interfaces for a typical dual GNS 480 avionics stack are shown in Figure 1 3 The available interfaces a...

Страница 14: ...on VHF Nav or GPS data The GNS 480 also accepts a resolver input from this CDI The GNS 480 is capable of driving a second external CDI with information based upon GPS data 1 2 2 2 Composite Indicator...

Страница 15: ...the standard Garmin AT MAPCOM data 1 2 2 7 RS422 Interfaces The GNS 480 has one user configurable bi directional RS422 port This port is not currently used 1 2 2 8 ARINC 429 Interfaces The GNS 480 has...

Страница 16: ...0 mA typical 175 mA max at 28 VDC receive 2 1 A typical 3 2 A max at 14 VDC transmit 1 0 A typical 1 6 A max at 28 VDC transmit Note receive max at full receive audio transmit max at 90 modulation at...

Страница 17: ...r to a value 0 2 fL 1 3 5 GPS WAAS RECEIVER PERFORMANCE TSO JTSO Compliance TSO C146a RTCA DO 229C JTSO C146 Number of channels 15 12 GPS and 3 GPS WAAS SBAS Frequency 1575 42 MHz L1 C A code Sensitiv...

Страница 18: ...3 7 COMM TRANSMITTER PERFORMANCE TSO JTSO Compliance TSO C37d RTCA DO 186 DO 186a JTSO 2C37e TSO C128 RTCA DO 207 JTSO 2C128 Class 4 Output power 8 watts minimum carrier at 12 VDC input 6 watts minimu...

Страница 19: ...shall not be less than15 dB Audio response Less than 6 dB variation from 350 Hz to 2500 Hz 1 3 8 2 Localizer TSO JTSO compliance TSO C36e RTCA DO 195 JTSO C36e Operational class A manual landing syst...

Страница 20: ...ation 150 mv full scale 200 load max TO OFF FROM flag 250 mv TO FROM 200 load max Nav valid flag 300 mv for valid indication 200 load max Nav superflag Vin 2 volts minimum for valid source capability...

Страница 21: ...3 9 3 Composite Output 1 3 9 3 1 VOR Mode Band pass frequency 0 Hz to 15 kHz Variation over frequency range Less than 2 dB Output signal voltage 0 500 VRMS Output loading 1 000 ohms max 1 3 9 3 2 LOC...

Страница 22: ...575 MHz Polarization Right Hand Circular Axial Ratio 3 dB Max at bore site Radiation Coverage Elevation Angle Minimum Gain 15 2 0 dBic 10 3 0 dBic 5 4 5 dBic 0 7 5 dBic Finish Polyurethane Enamel Weig...

Страница 23: ...t Hand Circular Axial Ratio 3 dB Max at bore site Radiation Coverage Elevation Angle Minimum Gain 15 2 0 dBic 10 3 0 dBic 5 4 5 dBic 0 7 5 dBic Finish Polyurethane Enamel Weight 7 0 oz 0 2 kg Height 0...

Страница 24: ...f 108 112 Megahertz MHz TSO C37d JTSO 2C37e VHF Radio Communications Receiving Equipment Operating Within the Radio Frequency Range 117 975 to 137 000 Megahertz TSO C38d JTSO 2C38e Class D VHF Radio C...

Страница 25: ...JTSO Minimum Performance Standard Software ED 12B Com JTSO 2C37e Transmitter 100nm range JTSO 2C38e Receiver JTSO 2C128 Stuck Mic EUROCAE ED 23B EUROCAE ED 23B EUROCAE ED 67 Level C VOR ILS JTSO C34e...

Страница 26: ...by purchasing database subscription updates from Jeppesen Sanderson The database card is programmed using the supplied CompactFlash memory card R W and Jeppesen provided software Contact Jeppesen at...

Страница 27: ...n Guide and other pilot related items 140 0060 xxx 1 GNS 480 MX20 In Flight Demo DVD 140 0061 xxx 1 GNS 480 Promotional CD 424 2014 8xx 1 GNS 480 Installation Kit see Table 1 4 for detail 424 2016 xxx...

Страница 28: ...X 075 Note Hardware Kit items may optionally be provided loose as part of the Installation Kit Table 1 6 Optional Equipment Available from Garmin AT Item Description 115 0007 Splitter 2 way 50 BNC NAV...

Страница 29: ...Augmentation System LCD Liquid Crystal Display LNAV Lateral Navigation LOC Localizer MFD Multi Function Display NAV VHF Navigation NDB Non Directional Beacon OBS Omni Bearing Selector PDA Personal Di...

Страница 30: ...General Information 1 20 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...

Страница 31: ...FAA Form 337 The WAAS GPS installation instructions have been prepared to meet the guidance material defined in AC20 138A Final Draft Airworthiness Approval of Global Navigation Satellite System GNSS...

Страница 32: ...612 2 5 INSTALLATION CONSIDERATIONS Installation of this STC does not change the types of approved airplane operations as defined by FAR 23 1525 e g IFR VFR day or night If a change in approved operat...

Страница 33: ...source selection annunciator is required To take full advantage of the GNS 480 capabilities an optional altitude source is recommended for automatic sequencing of course to altitude CA and heading to...

Страница 34: ...as follows from highest to lowest 1 ARINC 429 ADC 2 FADC 3 RS232 Altitude Encoder NOTE Although the GNS 480 can be configured to accept data from an RS232 altitude encoder on different ports the GNS 4...

Страница 35: ...e pilot head movement when transitioning between looking outside of the cockpit and viewing operating the GNS 480 The location should be such that the GNS 480 is not blocked by the glare shield on top...

Страница 36: ...within 11 8 inches to the left of the centerline and the bottom edge of the GNS 480 is in the acceptable area the GNS 480 is considered within the acceptable field of view 4 If the GNS 480 does not me...

Страница 37: ...YPE CERTIFICATED CDI OR HSI LOCATION IS BELOW THE BASIC T THE LOWER LIMIT OF THE ACCEPTABLE FIELD OF VIEW SHOULD BE IN LINE WITH THE BOTTOM OF THE CDI OR HSI 3 FOR AIRCRAFT WITHOUT THE BASIC INSTRUMEN...

Страница 38: ...onnector Route the wiring bundle as appropriate Use 22 to 24 AWG wire for all connections except for power Use 20 AWG for power ground Avoid sharp bends 2 5 5 AIR CIRCULATION AND COOLING The GNS 480 h...

Страница 39: ...installer use eight screws four on each side The mating holes in the instrument panel structure must also be countersunk to accept the screw head so that the screw head is flush with the inside surfac...

Страница 40: ...e the RF connectors may bind when the screws are tightened To further reduce the chances of binding ensure that the mounting flange on each RF connector is straight prior to installation when viewed f...

Страница 41: ...Installation Procedures GNS 480 CNX80 Installation Manual560 0982 01 Rev A 2 11 Figure 2 3 GNS 480 Dimensions...

Страница 42: ...holes on the bottom of the connector plate keeping the ground leads to a maximum of 3 inches long 2 6 2 UNIT INSERTION Position the cam lock as shown below The front lobe of the cam should be vertical...

Страница 43: ...zel It is not recommended that you pull the unit out by the rotary knobs No special extraction tools are required if the mounting tube is properly installed 2 6 4 UNIT REPLACEMENT Whenever the GNS 480...

Страница 44: ...Installation Procedures 2 14 560 0982 01 Rev A GNS 480 CNX80 Installation Manual Figure 2 6 Mounting Frame Assembly...

Страница 45: ...tenna 162 1008 Coax Plug right angle mnt N A N A P4 Com I O 162 1575 15 Pin D Sub Receptacle 245 0027 20 24 AWG socket contact P5 I O Expansion 162 0109 78 Pin D Sub Plug 162 0082 22 28 AWG pin contac...

Страница 46: ...TOR DEFINITION Figure 2 7 Rear Mounting Tube Connector Layout NOTE The rear connector plate is shown with right angle RF connectors Straight RF connectors with female BNC connections Garmin AT P N 162...

Страница 47: ...In COM Flip Flop discrete input active low 2 8 9 2 15 I UP Discrete In Activate COM User list and scrolls up active low 2 8 9 5 16 I Power Main Aircraft Power Input 10 to 36 VDC 2 8 1 17 O Time Mark O...

Страница 48: ...r Main Aircraft Power Input 10 to 36 VDC 2 8 1 2 RESERVED RESERVED 3 RESERVED RESERVED 4 I PTT Push To Talk Transmit Key active low 2 8 9 4 5 RESERVED RESERVED 6 O Com Speaker Out Speaker output high...

Страница 49: ...O OBI Data Digital OBI Data 18 I Hdg Synchro Y Heading Synchro Input Y 2 8 6 19 I Hdg Synchro X Heading Synchro Input X 20 I Hdg Synchro Ref Hi Heading Synchro Reference In Hi 21 O RS232 TxD5 RS232 c...

Страница 50: ...8 7 4 62 O Parallel Track Annc Parallel Track Annunciator active low 2 8 7 5 63 O Suspend Annunciate Suspend Annunciator active low 2 8 7 6 64 O Message Annunciate Message Annunciator active low 2 8...

Страница 51: ...E RMI Z Y X H B B A A A A R B B T T R Discrete Outputs 2 3 2 C H 7 8 4 2 9 I N 3 4 2 9 I N 2 4 2 9 I N 1 R S V D 4 2 9 O U T 2 4 2 9 O U T 1 2 3 2 C H 5 C SYNCRO R S V D B A R O S R S V D G D U V F T...

Страница 52: ...CDI Right CDI Right output 14 O Main CDI Left CDI Left output 15 O Back Course Out active low output when reverse sensing is engaged 2 8 7 2 16 O OBS_ F S4 OBS OBS Resolver input pin from channel F SI...

Страница 53: ...and vertical deviation from selected course lateral and vertical flags and superflags and TO FROM indications The CDI key on the bezel of the GNS 480 is used to toggle between the display of GPS and V...

Страница 54: ...Each flag output provides 300 mV when valid information is present and is capable of driving up to a 200 load i e up to a maximum of five 1k loads connected in parallel 2 8 2 4 Superflags P7 9 Main G...

Страница 55: ...etween GPS and VOR ILS it is not necessary to use these outputs to drive an indicator It is only necessary if it is desired to have a separate indicator display GPS deviation information full time Thi...

Страница 56: ...0 for additional information on the serial interfaces In addition the GNS 480 can accept the baro correction using the potentiometer output from a suitable altimeter If baro correction and uncorrected...

Страница 57: ...ions available on the front of the GNS 480 These can be used to drive annunciator lamps to make the annunciation available remotely such as in the pilot s primary field of view All of these outputs ar...

Страница 58: ...green text 2 8 7 5 Parallel Track Annunciation P5 62 Parallel Track Annc The Parallel Track Annc output is grounded whenever the parallel track mode has been selected If an external annunciator is use...

Страница 59: ...the next leg the waypoint annunciator will extinguish If an external annunciator is used for waypoint annunciation it is recommended that the waypoint annunciator be labeled WPT in white text 2 8 7 1...

Страница 60: ...input of an autopilot or flight director to provide higher autopilot gain when the GNS 480 is operating in precision approach mode 2 8 8 3 Audio Message Active Out P5 70 Audio Msg Active Out The Audi...

Страница 61: ...input performs the same function as pressing the CDI key on the GNS 480 bezel NOTE If the GNS 480 is setup to IGNORE the CDI select key and discrete input refer to 3 2 1 6 this input will not be funct...

Страница 62: ...ressing the SUSP key on the GNS 480 bezel 2 8 9 7 Audio Inhibit In P5 77 Audio Inhibit In The Audio Inhibit In is used to inhibit the GNS 480 audio messages A ground on this input causes GNS 480 audio...

Страница 63: ...llowing these lines to be used for communication with other devices The GNS 480 can receive air data and fuel data from certain systems on RS232 RxD5 although it is recommended that if a dedicated alt...

Страница 64: ...2 AHRS 3 EFIS software version 1 3 and later 4 SKYWATCH software version 2 0 and later 5 SKYWATCN NO UI software version 2 0 and later NOTE Not all configurations are available for each input channel...

Страница 65: ...2 0 and later NOTE The GAMA 429 No FP configuration does not contain flight plan information Table 2 10 ARINC 429 Output Labels Label No Parameter Name 1 2 3 4 001 Distance To Go BCD 002 Time To Go BC...

Страница 66: ...Vertical Scale Factor Note 5 351G Distance To Destination Via Flight Plan 352G Estimated Time To Destination Via Flight Plan 371G Specific Equipment ID Note 4 377 Equipment Hex ID Code Note 4 Notes 1...

Страница 67: ...Height HAE 377 Equipment Hex ID Code 0Bh Refer to section 3 2 1 2 for information on configuring the ARINC 429 outputs 2 8 11 TIME MARK OUTPUT P1 17 Time Mark Out P1 19 Time Mark Out The Time Mark Out...

Страница 68: ...igned for a standard carbon or dynamic mic with integrated pre amp providing minimum 70 mv rms into 1000 load The GNS 480 provides a bias voltage to the microphone 2 8 12 3 Push to Talk PTT P4 4 PTT T...

Страница 69: ...io messages to be inhibited by higher priority systems Refer to Appendix D for interconnect information 2 8 14 1 Message Audio Out P5 40 Message Audio Out P5 43 Message Audio Gnd The Message Audio Out...

Страница 70: ...f a localizer channel is tuned on the GNS 480 Nav receiver the bearing data is flagged as invalid 2 8 16 DME TUNING The GNS 480 can channel a DME based upon the tuned VOR frequency The GNS 480 outputs...

Страница 71: ...hes from other antennas emitting less than 25 watts and two feet from higher power antennas See A 33 GPS Antenna Installation Manual p n 560 0949 xx for more information on GPS antenna installation Sp...

Страница 72: ...notch filter may be installed in series with the antenna coax of the VHF comm transceiver to reduce or eliminate the harmonic interference A notch filter for this use part 162 1059 is available from G...

Страница 73: ...tallation of the GNS 480 Follow the guidelines as established in AC 43 13 1B Chapter 10 section 2 Make appropriate entries in the equipment list indicating items added removed or relocated along with...

Страница 74: ...0 CNX80 Installation Manual NOTE Circuits should be protected in accordance with guidelines in AC 43 13 1B chapter 11 section 2 paragraph 429 Power inputs should be across a minimum of all four specif...

Страница 75: ...interference 3 2 EQUIPMENT SETUP AND CONFIGURATION Prior to system operation the GNS 480 must be configured for the particular installation using the setup functions provided The system setup and chec...

Страница 76: ...the SERIAL PORTS line select key to change the serial port settings The serial port setup page is shown in Figure 3 2 Figure 3 2 Serial Port Setup Page Push the small inner knob in to enter the editi...

Страница 77: ...M 9600 CROSSFILL 38400 None CROSSFILL 38400 None 3 2 IrDA 9600 115200 IrDA 9600 115200 None None 4 None None 5 SL30 9600 MAPCOM 9600 Alt Enc 1200 9600 FADC 9600 None MAPCOM 9600 None 6 4 SL70 9600 SL7...

Страница 78: ...ilable configuration is found in section 2 8 10 2 The Source Destination Identifier SDI field on the EFIS ARINC 429 input can be configured as SYS 1 or SYS 2 and should be set according to which syste...

Страница 79: ...tomatically be changed to INSTALLED 2 Press the 10 30 line select key to toggle between 10 and 30 degrees for the calibration increment NOTE An increment of 30 degrees should be acceptable for most in...

Страница 80: ...n and baro corrected altitude from an FADC which may be desirable in certain installations While on the Ground Maintenance SETUP menu page press the BARO line select key Press the top line select key...

Страница 81: ...ow the instructions on the display for calibrating the baro potentiometer If the GNS 480 will not accept the calibration when the MENU ENTER key is pressed there may be a problem with the baro potenti...

Страница 82: ...ain value the Mic Gain value is restricted to a number from 0 to 255 When the desired value is selected press the MENU ENTER key or the SAVE MIC GAIN line select key to save the setting Figure 3 8 Com...

Страница 83: ...tical Offset setup function is used to enter the height above ground of the GPS antenna Prior to proceeding measure the GPS antenna vertical offset to the nearest foot as shown in Figure 3 10 Figure 3...

Страница 84: ...1 8 GTX Transponder Setup Items The GTX Setup function is used to configure the GTX transponder if no GTX transponder is setup this menu choice will not be displayed The menu that is displayed when th...

Страница 85: ...Post Installation Configuration Checkout GNS 480 CNX80 Installation Manual560 0982 01 Rev A 3 11 GTX Main Setup Page for GTX 32 327 GTX Main Setup Page for GTX 33 330 Figure 3 12 GTX Main Setup Page...

Страница 86: ...ording to the installation and leave unused ports set to NONE Either press the small inner knob again or press the MENU ENTER key to save the settings Press the BACK smart key to return to the GTX Mai...

Страница 87: ...setting Set each serial port according to the installation and leave unused ports set to NONE Either press the small inner knob again or press the MENU ENTER key to save the settings Press the BACK sm...

Страница 88: ...uration Setup Page Second Page GTX 33 330 only Figure 3 15 GTX Aircraft Configuration Setup Page Push the small inner knob in to enter the editing mode Use the large outer knob to select the next or p...

Страница 89: ...YES the squat sense field is used to define the state of the squat switch input which is recognized as being on the ground weight on wheels DELAY TIME This is the number of seconds the aircraft must b...

Страница 90: ...unknown airspeed depending on the type of aircraft Defaults to less than or equal to 150 knots Enter the aircraft s maximum cruising true airspeed capability SELECTION DESCRIPTION MAX AIRSPEED UNKNOW...

Страница 91: ...sage 0 must be stopped by pressing the PLAY softkey while the tone is playing None of the other messages will be available while the continuous tone is playing SELECTION DESCRIPTION VOICE MALE FEMALE...

Страница 92: ...s setup page is shown in Figure 3 17 Figure 3 17 GTX Diagnostics Page GILLHAM ALTITUDE If Gillham altitude is provided to the GTX transponder this field will display the value of the Gillham altitude...

Страница 93: ...Once the wiring is verified perform the System Checkout 3 3 2 3 3 1 GNS 480 CHECKOUT UTILITIES 3 3 1 1 Test Function The Test function allows the checkout of the display controls and I O of the GNS 48...

Страница 94: ...press the FLAGS line select key to display the FLAG test page Press the SELECT line select key to toggle between MAIN and AUX CDI flag tests as shown in Figure 3 19 and Figure 3 20 respectively Figur...

Страница 95: ...eviation test The test is initiated as soon as it is selected There are five CDI tests in the following order CDI TRIANGLE TEST gradually drives the CDI needle left and then right CDI LEFT TEST drives...

Страница 96: ...dually drives the VDI needle up and then down VDI Down Test drives the external VDI needle full scale down i e output set to 150mV down VDI Mid Test drives the external VDI needle to center i e output...

Страница 97: ...ounded and a black background indicates that the annunciator output is OFF open Details for each annunciator lamp output that can be tested are found in Table 3 5 Table 3 5 Lamp Output Test Items Disp...

Страница 98: ...PAGE line select key followed by the DISPLAY line select key to go to the Display Test page Turn the outer knob while on any Test Pattern page to display the next Test Pattern Page in the sequence Th...

Страница 99: ...ey test the results will be shown on the display If a key knob is not actuated for ten seconds 30 seconds for the first key in the test sequence the test will automatically advance to the next key kno...

Страница 100: ...Turn the small inner knob to change the value of the selected parameter The roll steering parameter can be set from 30 left to 30 right in one degree increments The ground speed can be set from 0 kts...

Страница 101: ...Press the NEXT line select key to show the next page which is shown in Figure 3 28 Figure 3 28 Interface Monitor Function Display Page 2 This page displays activity on each of the serial inputs and al...

Страница 102: ...anges from a 0 to a 1 when activated the CDI Select input will momentarily change to a T when exercised For each GNS 480 serial input that is used verify that data is being received If no data is bein...

Страница 103: ...input is grounded P5 76 Suspend In P5 76 0 in input is open 1 if input is grounded P5 77 Audio Inhibit In P5 77 0 in input is open 1 if input is grounded P5 78 RESERVED P5 78 0 in input is open 1 if i...

Страница 104: ...it will be saved and updated automatically so it will not be necessary to re enter the information at every start up If the GNS 480 is moved a great distance without being turned on the seed position...

Страница 105: ...y to accept the changes and then press the MENU ENTER key again to acknowledge the STOP message NOTE GPS acquisition may take up to 20 minutes after a Master GPS Reset is performed 3 3 2 1 2 GPS Opera...

Страница 106: ...ignal status of each satellite being received If the satellite signals are significantly degraded or some satellite signals are lost during the test continue transmitting for another 15 seconds Verify...

Страница 107: ...d Collins 479S 6 3 3 2 3 VHF Com Checkout 3 3 2 3 1 Antenna Check If desired the antenna VSWR can be checked using an inline wattmeter in the antenna coax using frequencies near both ends of the band...

Страница 108: ...eatedly until the SYS smart key is displayed The SYS smart key is then pressed followed by the CNFG smart key if necessary 2 While on the System Configuration page rotate the large outer knob to scrol...

Страница 109: ...should be within 0 03 Hg 1 mB of the altimeter setting 3 3 2 4 3 Air Data Computer Altitude Encoder and Fuel Air Data Computer The GNS 480 can receive altitude or fuel air data from an external sourc...

Страница 110: ...k the System Info page on the MX20 to verify that the data is available to each port and that it is being processed properly 2 Load a flight plan into the GNS 480 and verify that the flight plan is di...

Страница 111: ...p Single GNS 480 Installation 1 Verify that the transponder squawk code is displayed in white Press the XPDR bezel key and verify that you are able to change the transponder squawk code on the GNS 480...

Страница 112: ...onnections and configuration setup 1 Operate the SL30 in NAV mode 2 Press the SL30 SEL button to bring up the NAV frequency recall lists 3 Turn the SL30 large knob clockwise until the nearest VOR list...

Страница 113: ...f necessary the ground speed can be adjusted using the small inner knob and then pressing the MENU ENTER key to acknowledge the entry CAUTION When the autopilot is engaged flight control surface movem...

Страница 114: ...The TFC smart key is then pressed to display the traffic page 2 Verify that Data Fail is not displayed and the Skywatch operating mode is displayed in the upper right hand corner NOTE The following s...

Страница 115: ...ion at a range of at least 50nm while maintaining an appropriate altitude and over all normal flight attitudes Performance should be checked using low high and mid band frequencies 3 3 3 2 VOR Flight...

Страница 116: ...p sequence 2 Wait for the database page to be displayed 3 Verify that the database is not expired the expiration date will be displayed in green text if the database is current and yellow text if it h...

Страница 117: ...tput Configuration ______________ N A Port 7 _____________ Hi Low Channel 1 Out ______________ N A Port 8 _____________ Hi Low Channel 2 Out Resolver Baro Correction Resolver Installed Not Installed B...

Страница 118: ...reception checked Sidetone level set checked Localizer reception checked Deviation needle and flag checked INTERFACE CHECKOUT N A GNS 480 Message Audio N A SL30 Nav Com N A Altimeter Baro Correction N...

Страница 119: ...n Noise interference from other avionics Turn all avionics off then turn on each piece one at a time to isolate the source of the interference Route GPS cable and locate GPS antenna away from sources...

Страница 120: ...crease AMA volume level AMA adjustment is found under the AUDIO menu in the COM function Turn message tone ON via system configuration page Verify that inhibit input P5 77 is not grounded using Ground...

Страница 121: ...0 is not receiving baro correction setting from altimeter GNS 480 baro pot input not configured correctly GNS 480 baro pot input not calibrated GNS 480 is not the only device tied to the altimeter bar...

Страница 122: ...onnected together not applicable to dual GNS 480 s controlling the SL70 Check RS232 port setting for port that device is connected to Verify the configuration of the other device Verify GNS 480 Rx is...

Страница 123: ...t aircraft Additional operation approvals may require FAA evaluation of all the systems installed in a particular aircraft and is outside the scope of the GNS 480 STC 5 2 INSTALLATION The conditions a...

Страница 124: ...nal design This includes the preservation of multiple power buses which reduce the probability of interrupting power to essential instruments and avionics For Aircraft on the AML certified under 14 CF...

Страница 125: ...memory and GPS system information Regular planned replacement is not necessary The GNS 480 will display a low battery message when replacement is required Once the low battery message is displayed th...

Страница 126: ...Periodic Maintenance 6 2 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...

Страница 127: ...roofness 10 Equipment identified as Category X no test required Fluids Susceptibility 11 Equipment identified as Category X no test required Sand and Dust 12 Equipment identified as Category X no test...

Страница 128: ...DATA Refer to Garmin AT document 560 0988 00 for data regarding GNS 480 STC authorization This document contains information on the following items Supplementary Type Certificate STC STC Permission ST...

Страница 129: ...E No input connected N A MAPMX Proprietary interface between GNS 480 and MX20 v5 0 or later This interface will support auto chart selection flight plans zoom scale matching altimeter correction and I...

Страница 130: ...Figure B 1 Table B 2 Altitude Input Data Byte Data Format Description 1 ASCII 023h 2 A ASCII A 041h 3 L ASCII L 04Ch 4 ASCII space 020h 5 or Altitude sign ASCII or 02Bh or 02Dh 6 10 ddddd Altitude in...

Страница 131: ...9600 baud with a message length of 17 characters as defined below RMS sp 12345T 12ul CR where RMS ASCII characters sp space 0x20 sign indicator 0x2b or 0x2d 12345 altitude in feet T ASCII character s...

Страница 132: ...e following table s a sign indicator E W d a decimal digit 0 9 checksum the message checksum same format as message ETX ASCII end of text character ETX 03h Table B 3 Fuel Air Data Message Data S Forma...

Страница 133: ...uded in Table B 4 Baud rate 9600 Data bits 8 Stop bits 1 Parity none Expected input rate approx 1 second Message length variable 512 character max Example Fuel Airdata Input Data STX SA223 223 knots i...

Страница 134: ...T 7 True Air Temp or Static in degrees Celsius ZH ddd WDIR 7 Wind Direction 0 to 359 degrees from true north ZI ddd WSPD 7 Wind Speed in knots ZJ sdd TURN 7 Rate of Turn in degrees second is right is...

Страница 135: ...2 1 SL70 SL70 SL70R mode control and altitude data Refer to SL70 installation manual 560 0402 xx IRDA Not currently supported N A GTX32 Proprietary interface between GNS 480 and GTX 32 327 transponder...

Страница 136: ...resent longitude s sign E for east W for west ddd degrees mm minutes hh hundredths of minutes C ddd 3 Track magnetic ddd degrees D ddd 3 Ground speed ddd knots E ddddd 5 Distance to active waypoint dd...

Страница 137: ...ving Map Binary Route Data Table B 7 Moving Map Binary Route Data Byte Data Format Description 1 w Item designator 2 3 dd Current waypoint number in ASCII 01h to 20h 4 xiannnnn Sequence number x undef...

Страница 138: ...ues s 1 End of list 0 all other ddddddd 1 20 list waypoint index sddddddd 0xFF List Type is EMPTY BYTE 4 terminate Item 3 t Waypoint Type t a airport v VOR n NDB i INT u USER 4 Cr r Item Terminator 0x...

Страница 139: ...sing the following format PMRRC msg_id msg_data chksum cr Example Moving Map Data Output AN 34 1570 34 15 70 latitude BW 118 4390 118 43 90 longitude C306 306 track angle D210 210 knots E02682 268 2nm...

Страница 140: ...o output the airport frequency information for the previously output ident Message Format PMRRC05tfmk chksum cr 05 message id t list type input 1 f frequency type 0 TWR tower frequency 8 CTF common tr...

Страница 141: ...the station identifier is less than four characters then the trailing characters will be filled with spaces Station Identifiers are restricted to using ASCII characters 0 9 and A Z mk Frequency m MHz...

Страница 142: ...aracters to identify the runway associated with the localizer followed by two characters defining the frequency Message format V Message Class This is a VHF NAV message 23 Message Identifier iiii Stat...

Страница 143: ...the 10s and 1s place of the range and the last digit is the 1 10th s place This field may range in value from 0 0 NM 0000 to 999 9 NM 9999 If the distance from the DME station is greater than 999 9NM...

Страница 144: ...Appendix B Serial Interface Specifications B 16 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...

Страница 145: ...ny standard encoder the GTX 33 330 will transmit altitude data 100 ft resolution to the GNS 480 For the GTX 33 330 altitude data is provided to the GNS 480 on serial port 6 configured for GTX33 OR GTX...

Страница 146: ...GNS 480 Other altimeters may be used to provide baro correction to the GNS 480 provided they have a potentiometer with a minimum resistance of 5 k Manufacturer Model Notes Bendix King KEA 130A KEA 34...

Страница 147: ...terface Notes Sandel Avionics SN3308 Analog deviation and RS232 Low speed C 7 TRAFFIC ADVISORY SYSTEMS The following traffic advisory systems are compatible with the GNS 480 Manufacturer Model Interfa...

Страница 148: ...Appendix C Equipment Compatibility C 4 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...

Страница 149: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 1 APPENDIX D INTERCONNECT DIAGRAMS...

Страница 150: ...Appendix D Interconnect Diagrams D 2 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...

Страница 151: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 3 Figure D 1 Main Power and Antenna Interconnect Diagram...

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Страница 153: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 5 Figure D 2 Main Course Deviation Indicator Interconnect Diagram...

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Страница 155: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 7 Figure D 3 Auxiliary CDI Interconnect Diagram...

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Страница 157: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 9 Figure D 4 Baro Potentiometer Syncrho Heading RMI Interconnect Diagram...

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Страница 159: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 11 Figure D 5 RS232 Serial Interfaces Interconnect Diagram...

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Страница 161: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 13 Figure D 6 GNS 480 to SL10 15 Audio Panel Interconnect Diagram...

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Страница 163: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 15 Figure D 7 DME Tuning Interconnect Diagram...

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Страница 165: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 17 Figure D 8 S TEC Autopilot Interconnect Diagram...

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Страница 167: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 19 Figure D 9 Century Autopilot Interconnect Diagram...

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Страница 169: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 21 Figure D 10 Bendix King Autopilot Interconnect Diagram...

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Страница 171: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 23 Figure D 11 Single GNS 480 Full Stack Interconnect Diagram...

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Страница 173: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 25 Figure D 12 Full Stack with Dual GNS 480 s Interconnect Diagram...

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Страница 175: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 27 Figure D 13 GNS 480 to Sandel SN3308 Nav Display Interconnect Diagram...

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Страница 177: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 29 Figure D 14 GNS 480 to CDI HSI Source Select Annunciators Interconnect Diagram...

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Страница 179: ...Appendix D Interconnect Diagrams GNS 480 CNX80 Installation Manual 560 0982 01 Rev A D 31 Figure D 15 GNS 480 to Traffic System and Transponder Interconnect Diagram...

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Страница 181: ...ed in the manufacturer s provided avionics stack External CDI HSI source selection annunciation is required The CDI HSI source select annunciation must be installed in accordance with 2 5 3 2 D55 D55A...

Страница 182: ...Appendix E Acceptable Aircraft by Evaluation E 2 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...

Страница 183: ...amps with 14VDC lamps P N 14 113 Vivisun 95 45 11 B6 63816 Indicator Switch 28VDC Indicator with momentary switch can be converted to 14VDC operation by replacing qty 4 28VDC lamps with 14VDC lamps P...

Страница 184: ...Appendix F Optional Accessories Not Supplied F 2 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...

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