: Inspect the installation cable between the scanner unit and the display. Loose connections at terminal boards (e.g., TB101A or TB4310) or damaged wiring are frequent culprits.
The screen may be blank, show random noise, a frozen picture, or a “NO SYNC SIGNAL” alarm. no sync signal jrc radar
Dropping voltage under heavy engine loads or weak battery banks can cause the transceiver processing chips to reset or halt sync signal transmission. ⚙️ Mechanical Motor Failures : Inspect the installation cable between the scanner
Troubleshooting the "No Sync Signal" Error on JRC Radars The error (often appearing as "TXRX(AZI) Error" on newer models) is a common hurdle for mariners using JRC Marine Radar systems. This error indicates that the display unit is not receiving critical timing or rotation data from the scanner, effectively "blinding" your navigation. Immediate Causes & Quick Fixes Dropping voltage under heavy engine loads or weak
Moisture intrusion inside the multi-pin plugs (often at the base of the mast or the back of the display unit) corrodes the sync line contacts. ⚡ Power Supply Fluctuations
If the cable tests clean and the antenna spins, you must verify signal generation. Safely power up the unit in diagnostic mode.