Diagnostic Procedure

VSA OFF switch does not work (VSA cannot be turned OFF)

Symptom troubleshooting Symptom Troubleshooting.

Update the VSA modulator-control until if it does not have the latest software Testing and Inspection, or substitute a known-good VSA modulator-control unit Service and Repair, then retest. If it is OK, the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit Service and Repair.