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Old 11-07-2005, 11:44 AM
Join Date: May 2005
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Default RE: Servos JR 8411 always humming

Hi Panzerd18,
I'll try to help you.
The JR 539 servos are Standard High Torque Servos type and normally, they don't have have to hum beacause this type of servo has a resting point (at neutral position).
First, try to disconnet all the pushrods to let the servos free of charge.
If they continue to hum when youy don't operate the transmitter, the servo (or the servos) has (have) a problem. See your dealer for after-sales service.
If they don't hum, you have surely a "stuck point" in your control rod (s).