Mastering the "No Sync Signal" Error on JRC Marine Radars A or "TXRX(AZI) Error" on a Japan Radio Co. (JRC) marine radar is a critical fault that completely halts navigation capabilities. This alert means the processor unit inside the vessel is no longer communicating with the rotating scanner array mounted on the mast or arch. Without a synchronization pulse, the display unit cannot properly time the transmission echoes or calculate target bearings, leaving the bridge blind.
In some older traditional JRC open-array radars, signals pass through slip rings and carbon brushes. Worn or dirty brushes interrupt signal continuity. 2. Transceiver Unit (Scanner) Failures no sync signal jrc radar
Worn-out drive belts, frozen gears, or a burned-out drive motor will cause an instant sync shutdown. 🧠 Component Failures (PCB & Magnetron) Mastering the "No Sync Signal" Error on JRC
If the scanner spins but you still see "No Sync," the encoder is not sending the positional data. Without a synchronization pulse, the display unit cannot
In JRC radar systems, such as the JMA-5300 or JMA-9100 series, a "No Sync" or "TXRX(AZI) Error" usually points to one of three primary failures:
