Message Name:

R/T CIRCUITRY

Message Code:

B3-481263

Associated CAS:

None

Failure or problem is reported in the right HF R/T circuitry.

• R/T power amp fault (Label 351 - Bit 17)
• R/T power amp overtemp (Label 351 - Bit 18)
• R/T input power fault (Label 351 - Bit 22)

• Right HF Transceiver (HF) 2 (A62)
• Right HF Antenna Coupler (CP6)
• Fiber Optic Cables
• Associated Wiring

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

1. Reset HF 2 Circuit Breaker CB2-B3. Is the fault message still present?

1. If YES, continue with next step.
2. If NO, do close out.

2. Swap right HF Transceiver (A62) with Left HF Transceiver (A61). Is the fault message still present?

   1. If YES, continue with next step.
   2. If NO, replace defective HF Transceiver.

3. Download MDC and send all files back to the CRC for review.
4. Swap Antenna Coupler 2 with Antenna Coupler 1. If the problem is still on the same side, proceed with the steps below.
5. Check all Fiber Optics between #2 HF Antenna Coupler to the HF#2 Transceiver. Is the fault message still present?
   (i.e. HF 2 transceiver P3 and HF Antenna Coupler P2).

   1. If YES, continue with next step.
   2. If NO, do close out.

6. Make sure power is present at the HF#2 Transceiver. Is the fault message still present?

   1. If YES, continue with next step.
   2. If NO, do close out.

7. Make sure all PWR & Chassis ground are present at the HF#2 Transceiver.

   1. If fault is corrected, continue to next step.
   2. If fault persist, contact CRC for additional troubleshooting using the MDC download submitted in step 3.

8. Do close out.