Measure the resistance value with ohmmeter between the jumper AC plug and each exposed metal cabinet part, such as screwheads, antenna, control shafts, handle brackets, etc./Equipment with antenna terminals should read between 2.7MΩ and3.9MΩ to all exposed parts*. (
Fig.1
)/Equipment without antenna terminals should read approximately infinity to all exposed parts. (
Fig.2
)/*Note: Some exposed parts may be isolated from the chassis by design. These will read infinity.