User ManualTable of Contents1.1 INTRODUCTION1Versions Covered by this Manual11.2 FUNCTIONAL SUMMARY1GPS 4001GNC 4201GNS 43011.3 REPAIR PLAN11.4 SPECIFICATIONS11.5 GENERAL DESCRIPTION1Main Board1Com Board1Nav Board1GPS Module1Glideslope Board1Inverter Board1CDU Assembly1Map Board12.1 INTRODUCTION22.2 SPECIAL TOOLS AND TEST EQUIPMENT22.3 TEST PANELS AND CABLES23.1 TROUBLESHOOTING EQUIPMENT33.2 TROUBLESHOOTING ORDER33.3 TROUBLESHOOTING PROCEDURES3Fuses3Power Supply Checks33.3.2.1 Current Measurements33.3.2.2 Com Board33.3.2.3 Glideslope Board33.3.2.4 Nav Board3Processor Clock Check3Internal Clock CheckMain Processor33.3.3.2 Internal Clock CheckGPS Processor33.4 STATIC MESSAGES33.5 TESTING FAILURES33.6 EXTERNAL CONNECTORS33.7 CONNECTOR I/O DESCRIPTIONS33.8 BLOCK DIAGRAM34.1 INTRODUCTION44.2 REQUIRED TOOLS44.3 NAV DATA CARD REMOVAL AND INSERTION44.4 UNIT DESIGN44.5 DISASSEMBLY PROCEDURE4Remove the Top Cover4Remove the CDU Assembly44.5.2.1 Disassemble the CDU Assembly4Separate the Main and Nav Chassis4Remove Faulty Boards from the Main Chassis Top Cavity4Remove Faulty Boards from the Main Chassis Underside Cavity4Remove Faulty Boards from the Nav Chassis44.6 REASSEMBLY44.7 MEMORY BATTERY REPLACEMENT4Remove the Memory Battery45.1 INTRODUCTION55.2 RECOMMENDED TEST EQUIPMENT55.3 TEST SETUP55.4 STANDARD SIGNALS AND TEST LOADS5VHF Com Transceiver55.4.1.1 Standard Loads55.4.1.2 Standard Signals5Glideslope55.4.2.1 Standard Loads55.4.2.2 Standard Signals5NAV Receiver55.4.3.1 Standard Loads5VOR Standard Signals55.4.4.1 Standard Test Signals5Localizer Standard Signals55.4.5.1 Standard Test Signals55.5 ALIGNMENT55.6 CALIBRATION5Com Setup Page Fields55.6.1.1 Com Frequency55.6.1.2 Frequency Spacing55.6.1.3 SQ 25055.6.1.4 SQ 83355.6.1.5 Sidetone55.6.1.6 MIC Gain55.7 TEST PROCEDURES5Test Mode5Com Testing55.7.2.1 Power Input Check55.7.2.2 RF Power Out55.7.2.3 Frequency Stability and Tolerance55.7.2.4 Modulation Capability Test55.7.2.5 Carrier Noise Level55.7.2.6 Demodulated Audio Distortion55.7.2.7 Demodulated Audio Response5Sidetone5MIC Intercom Test5Receiver Sensitivity5TX Interlock5AGC Test5Selectivity (25 kHz Mode)5Selectivity (8.33 kHz Mode)5Volume Control (Audio Output)5Audio Distortion Test5Audio Frequency Response5Receiver Audio Compressor Test5Squelch Test5Frequency Modulation5Com Remote Transfer Input5Navigation Receiver Final Tests5Voice/Ident Audio Output Level5Voice/Ident Audio Frequency Response5Voice/Ident Audio Distortion5VOR AGC5VOR Audio Sensitivity5Receiver Quieting5Ident/Voice Tone Ratio5Harmonic Distortion5VOR Flag Sensitivity5LOC Flag Sensitivity5VOR/LOC Composite Test5VOR Course Deviation Sensitivity5Localizer Course Deviation Sensitivity5TO-FROM Indicator5Centering Accuracy5Course Deviation Accuracy Test5VOR OBS Bearing Accuracy5Selectivity5Spurious Response—VOR/LOC5Navigation Assembly I/O Tests5Localizer Course Deviation Test5To/From Deflection Output Characteristic Test5To/From Deflection Accuracy Test5Course Deviation Flag Output Characteristic Test5Course Deviation Flag Test5VOR/LOC Super Flag Output Test5NAV Input Lines5NAV OBI Outputs5Nav Serial DME Outputs5NAV Parallel DME Outputs5Glideslope Final Tests5Glideslope Course Deviation Output Characteristic Test5Course Deviation Deflection Accuracy Test5Course Deviation Flag Test5Glideslope Superflag Output Test5Receiver Sensitivity5Centering Accuracy5AGC5Selectivity (Bandwidth)5Nose Bandwidth5Skirt Bandwidth5Spurious Response5Status Tests5Main Board Final Tests5Push Button Response5Rotary Knobs5Map ID and Data Card Test5Photocell5Lighting Bus Input5Memory Battery Voltage5Display Pattern Test5Fan Test5Unit Configuration Test5GPS Antenna Bias5GPS Noise5Satellite Tracking Test5MAIN Lateral LEFT, RIGHT Outputs5MAIN Vertical UP, DOWN Outputs5MAIN To/From Output5MAIN Lateral Flag Output5MAIN Vertical Flag Output5MAIN Lateral Super Flag Output5MAIN Vertical Super Flag Output5Annunciate Outputs5OBI Serial Interface5Discrete Switch and Altitude Inputs5ARINC 429 Transmitters and Receivers5RS232 Ports5OBS56.1 INTRODUCTION66.2 TABLES67.1 INTRODUCTION77.2 DRAWING LIST7Com Chassis Nut2Signal And Load Drawing-J1 (Sheet 1 of 2)2Signal And Load Drawing-J1 (Sheet 2 of 2)2Signal And Load Drawing-J22Signal And Load Drawing-J62Main Board Fuse Locations3Com Board Fuse Location/F6003Com Board Fuse Location/F600 (Replaced by R611)3Nav Board Fuse Locations3Processor Location (Main Board)3External Connectors3400 Series Block Diagram3Nav Data Card Installation And Removal4Memory Battery Location (Main Board)440dB Attenuator Circuit5Com Setup Page5R558 (Com Board)5Test Pages5Modulation Measurement5VOR/LOC/GS CDI Test Page5Main Lighting and Main Analog Test Pages5GPS Test Page5Main CDI/OBS Configuration Test Page5Main Discrete Outputs Test Page5Main Discrete Inputs Test Page5Main Status/Loopback Test Page5Main CDI/OBS Configuration Page5Sub-Assembly, GNS 430 (Dwg. No. 015-00280-XX, Rev. P)7Main Chassis Assembly, GNS 430(A) (Dwg. No. 015-00283-00, Rev. Q)7Nav Chassis Assembly, GNC 400 (Dwg. No. 015-00282-00, Rev. K)7GNC 4XX CDU Assembly (Sheet 1 of 2) (Dwg. No. 015-00281-XX, Rev. F)7Sub-Assembly, GNC 420 (Dwg. No. 015-00506-XX, Rev. N)7Main Chassis Assembly, GNC 420(A) (Dwg. No. 015-00283-01, Rev. J )7Sub-Assy, GNC 420A (Dwg. No. 015-00837-XX, Rev. A )7Main Chassis Assembly, GPS 400 (Dwg. No. 015-00283-03, Rev. J)7Assy Dwg, GPS 400 (Dwg. No. 015-00504-XX, Rev. G)7Unit Configuration1Unit Board Power Supply Max Current Allowed3Com Board Power Supply Tolerances3Glideslope Board Power Supply Tolerances3Nav Board Power Supply Tolerances3Static Messages3Testing Failures-Main Board3Testing Failures-COM Board3Testing Failures-NAV Board3Testing Failures-Glideslope3Testing Failures-NAV Receiver3Channel ID And Frequency5Sub-Assy, GNS 430 28V, Black (Unit P/N 011-00280-00, Figure 7-1)6Sub-Assy, GNS 430 14/28V, Black (Unit P/N 011-00280-10, Figure 7-1)6Sub-Assy, GNS 430 14/28V, Gray (Unit P/N 011-00280-30, Figure 7-1)6Sub-Assy GNS 430A, 28V, Black (Unit P/N 011-00836-00, Figure 7-1)6Sub-Assy GNS 430A, 28V, Gray (Unit P/N 011-00836-10, Figure 7-1)6Main Chassis Assy, GNS 430, 14/28V (Unit P/N 011-00283-10, Figure 7-2)6Main Chassis, GNS 430, 14/28V, (Unit P/N 011-00283-30, Fig. 7-2)6Main Chassis Assy, GNS 430, 28V, (Unit P/N 011-00283-00, Fig. 7-2)6Main Chassis Assy, GNS 430A, 28V (Unit P/N 011-00283-20, Figure 7-2)6Sub-Assy, CDU, GNS 430 Black (Unit P/N 011-00281-00, Figure 7-4)6Sub-Assy, CDU, GNS 430, Gray (Unit P/N 011-00281-04, Figure 7-4)6Sub-Assy, CDU, GNS 430A, Black (Unit P/N 011-00281-00, Figure 7-4)6Sub-Assy, CDU, GNS 430A, Gray (Unit P/N 011-00281-04, Figure 7-4)6Sub-Assy, GNC 420, 28V, Black (Unit P/N 011-00506-00, Figure 7-5)6Sub-Assy, GNC 420, 14/28V, Black (Unit P/N 011-00506-10, Figure 7-5)6Sub-Assy, GNC 420, 14/28V, Gray (Unit P/N 011-00506-30, Fig 7-5)6Sub-Assy, GNC 420A, 28V, Black (P/N 011-00837-00, Figure 7-8)6Sub-Assy, GNC 420A, 28V, Gray (Unit P/N 011-00837-10, Figure 7-8)6Main Chassis Assy, GNC 420, 28V (P/N 011-00283-01, Figure 7-6)6Main Chassis Assy, GNC 420, 14/28V (Unit P/N 011-00283-11, Fig 7-6)6Sub-Assy, CDU, GNC 420, Black (Unit P/N 011-00281-01, Figure 7-4)6Sub-Assy, CDU, GNC 420, Gray (Unit P/N 011-00281-05, Figure 7-4)6Sub-Assy, CDU GNC 420A, Black (Unit P/N 011-00281-01, Figure 7-4)6Sub-Assy, CDU, GNC 420A, Gray (Unit P/N 011-00281-05, Figure 7-4)6Sub-Assy, GPS 400, 14/28V Black (Unit P/N 011-00504-00, Figure 7-1)6Sub-Assy, GPS 400, 14/28V Gray (Unit P/N 011-00504-10, Figure 7-1)6Nav Chassis Sub-Assy, GPS 400 (Unit P/N 011-00281-03, Fig 7-7)6Sub-Assembly, CDU, GPS 400, Black (Unit P/N 011-00281-03, Fig 7-4)6Sub-Assembly, CDU, GPS 400, Gray (Unit P/N 011-00281-06, Fig 7-4)6Size: 3.83 MBPages: 168Language: EnglishOpen manual