velodyne HGS 10 hum problem

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henrylr

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velodyne HGS 10 hum problem
« on: 25 Jun 2017, 06:17 pm »
Hi all,
I have an HGS 10 I bought new many years ago. Recently, when plugging in the AC power cord, it emits a hum. The sound is a constant pitch which starts loud and completely fades away after about a minute. It does this with or without an IC connected. Turning the volume knob has no effect. Has anyone had this problem? Does anyone know how to fix it?

Thanks,
henrylr