The error on a JRC radar is intimidating, but it is a logical, traceable fault. In 9 out of 10 cases, it is a cabling issue (corrosion or broken conductor) or a failing azimuth sensor. However, the remaining cases require oscilloscope analysis and knowledge of JRC’s unique interface board architecture.
A failing capacitor in the scanner’s 24V or 12V DC supply can introduce AC ripple. The sync generator requires clean DC to produce a square wave. Ripple causes the comparator circuit to miss zero-crossings, triggering a "No Sync" alarm. no sync signal jrc radar
When you see that dreaded text on the JRC display, remember: The radar wants to work. It is simply asking for the starting gun. Find the sync, and you find your way home. The error on a JRC radar is intimidating,
Look for chafing or stress points on the cable, especially where it passes through bulkheads or near the rotating scanner. B. Antenna Scanner Unit Failure A failing capacitor in the scanner’s 24V or