Yamaha LS9

[ALF]

I was gone and someone jacked with the board. The paired DVD channel is making a constant thump sound, like maybe a ground fault?

Thoughts?

 

[Dionysus]

What do you mean by "jacked with"?

paired DVD channel, I assume you mean one of the Stereo inputs? Plugged into the 1/4" inputs or XLR?

What are you calling a "constant thump sound"? A ground fault would not cause a repeating thump.

What does the meter for the channel show? what is the gain structure like? Does the DVD player output audio fine to something else?

What do you hear when you PFL the channel?

 

[FMEng]

The preamp (head amp) gain is probably turned way up and you are hearing circuitry noise from the DVD amplified greatly. Be careful to check it in PFL, otherwise you might launch your speakers into the next county.

 

[DaveySimps]

Do you have a base file you can recall to try and reset your "general" settings? Or a show file from before this occurred?

~Dave

 

[TimmyP1955]

If you are using the XLR inputs, make sure that phantom power is OFF on both channels.