02/23/21
Message Overview:
Message Name:
TOP/PORT DIPLEXER/LNA
Message Code:
B3-007979
Associated CAS:
| Reporting LRU: | SAT 2X00 |
| System Description: | 23-15-00 |
| Schematic Diagram: | None |
| Wiring Diagram: | None |
Message Description:
BSU Maint wd of Top/Port BSU indicates a T/P LNA/DPLXR FAULT except if SSM of BSU Maint Wd indicates Fail Warn or Self-test or RF FAULT - T/P LNA RX GAIN FAULT detected by system BITE.
Possible Causes:
- TOP/PORT DIPLEXER
- Low Noise Amplifier
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Fault Confirmation Procedure:
- Message# = 4
- Comp Id = A082
- Fault Logged = AIR,TAXI
- Status = FAILED/WIRING
- {Term Definitions}
- SRT1-2 XX 350 00 EXCT XXXX-XXXX XXXX-XXXX TXXX-XXXX 350: 16;TOP/PORT DIPLEXER/LNA
06/27/19
Quick Links:
| Wiring - Maintenance Practices - ALL | SPM 20-12-00-02 |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 |
| Electrical Connectors - Maintenance Practice - ALL | SPM 20-20-00-02 |
Troubleshooting Recommendations:
- BSU Maint wd of Top/port BSU indicates a T/P LNA/DPLXR FAULT except if SSM of BSU Maint Wd indicates Fail Warn or Self-test or RF FAULT - T/P LNA RX GAIN FAULT detected by system BITE.