Post by dj79 on Mar 4, 2017 15:34:45 GMT -5
Hi. I've enjoyed this DA30ES receiver for a long time, but recently it started showing this issue. When the unit is turned on, usually there is white noise on the left channel. It may go away on its own after a few minutes, or if I tap on the unit. It can also get worse with tapping, so I would tap on the sides, the top, or the back until I get the noise to stop. After that, or after warming up, it would work fine for hours. Investigating further, I noticed that I can get the noise it to stop easier if I push on the main board (I access it from the bottom of the unit after removing the bottom plate). I'm suspecting this is a contact issue, like a broken solder point, or perhaps one of the board traces is broken, and that it might be resolved by soldering a wire between two points, but the question is which ones.
Here are some more observations: The noise is independent of the input (analog, digital), and of the volume. When the volume is high enough, the sound can be heard over the noise. Also, the noise can be heard over pre-out, so I'd imagine the issue is somewhere in the preamp section after volume control. Do you think you can help me identify what's wrong here? Thanks.
Here are some more observations: The noise is independent of the input (analog, digital), and of the volume. When the volume is high enough, the sound can be heard over the noise. Also, the noise can be heard over pre-out, so I'd imagine the issue is somewhere in the preamp section after volume control. Do you think you can help me identify what's wrong here? Thanks.
