Verify the processor is outputting the required DC voltage (typically between +10.2V and +42V for smaller units) to the scanner. Step 2: Test the Pulse and Encoder Boards
The multicore cable between the radome/scanner and the display is the most frequent culprit. Damage from cable flexing, loose terminals at the strip, or corrosion in the 10-pin chassis plugs can interrupt signal flow. no sync signal jrc radar