2 problems: hum and progressive scan

Posted by: Ken Forton on 10 February 2009

I just bought an Arcam DV135 second hand. I am experiencing two problems.

One, when I try to play a CD while the player is also hooked up to my television, it emits a VERY loud hum. It hums when I use the HDMI connection and when I use the component video connections. It's as if my Nait 2 can't stand the idea of being connected to a television.

Two, I have a nice, small 16:9 Sony HDTV. The Arcam reads progressive scan on the display, but it is outputting a 4:3 picture and it looks like it is being compressed on the left and the right. Movies play in proper perspective on my XBOX, so I don't think it's the TV. I have checked the settings on the Arcam and I'm pretty sure I have the proper HDMI and perspective settings.

Any ideas?
Posted on: 10 February 2009 by SC
Problem 1, I'm guessing, is possibly a ground loop issue...Have a search on here and you will find similar stories and some advice about how to eliminate the issue....

Steve.
Posted on: 11 February 2009 by {OdS}
quote:
Originally posted by Ken Forton:
Any ideas?


About hum: try connecting the "video" hardware (tv and dvd player) and "audio" hardware to different wall sockets. It worked for me, but I understand this must be experimented on a case by case basis...!

About 4:3 ratio: it looks like your Arcam player forces the aspect ratio to 4:3 (obviously Winker). I guess there's an option in a menu where you can set your TV native aspect ratio so that the player outputs a properly dimensionned image.
Posted on: 11 February 2009 by Adam Meredith
Search under "earth or ground loop" (you could put my name in as author to save time).

http://forums.naim-audio.com/eve/forums/a/tpc/f/4801938...002913717#2002913717

Don't forget - all the other items connected to your television.

Also given that the NAIT (if as seems - earthed through your CD player) will represent a 0v ground point and any live, floating earth, device being attached will have its "floating" earth voltage drawn down to that (0v) point. This initial contact and voltage flow can damage.

Devices should be turned off to avoid this.