[nb]

Dear Group...

I repaired one power DENON amplifier (about 2 x 200 Watts)

Everything is OK, but if I turn the volume on higher level (both channels) -
I have hum.

If turn every channel separate (on preamp balance) - there is no problem.

Problem is present only when you drive both - left and right channels, or if
you switch off the light in room.

Funny ?

How repair this problem

Thanks

Boris

[TimPerry]

nb wrote:
Dear Group...

I repaired one power DENON amplifier (about 2 x 200 Watts)

Everything is OK, but if I turn the volume on higher level (both
channels) - I have hum.

If turn every channel separate (on preamp balance) - there is no
problem.

Problem is present only when you drive both - left and right
channels, or if you switch off the light in room.

Funny ?

How repair this problem

Thanks

Boris

replace lamp dimer with standard switch?