Heat the scanner unit gently with a hot air gun (hair dryer). If the sync signal appears after heating, you have a on the encoder amplifier board. Conversely, if the error appears after heating, a component is thermally failing.
Antenna rotates normally, but no sweep on screen or “NO SYNC”. no sync signal jrc radar
: If the scanner fails to rotate or transmit, the synchronization pulse is never generated. This can be caused by motor failure, relay circuit issues, or a faulty transmitter/receiver control circuit. Wiring and Connectivity Heat the scanner unit gently with a hot air gun (hair dryer)