OESF Portables Forum

Everything Else => Sharp Zaurus => Model Specific Forums => Distros, Development, and Model Specific Forums => Archived Forums => 5x00 Hardware => Topic started by: arniel on June 03, 2004, 11:54:24 am

Title: Headphone socket powered up even when Z is suspended?
Post by: arniel on June 03, 2004, 11:54:24 am

Has anyone else noticed that when you plug a pair of headphones into the Z (even when it is suspended), there is a faint crackling sound, suggesting that the headphone socket has a small current flowing thorugh it.
When I get home I will attach a multimeter to see what\'s going on.

Surely, this must drain the battery.

BTW, I am running OZ 3.2.

Arnie

Title: Headphone socket powered up even when Z is suspended?
Post by: sefthuko on June 04, 2004, 01:21:22 am

Yeah, I noticed it too.

It doesn\'t necessarily drain the battery, though, because no connection is made until you plug the headphones in.  I can\'t say how much energy is going through the headphone out, but you can always disconnect the headphones when not listening to the Zaurus to be safe

Title: Headphone socket powered up even when Z is suspended?
Post by: omega on June 04, 2004, 06:20:49 am

This happens on the C860 as well.

Title: Headphone socket powered up even when Z is suspended?
Post by: arniel on June 04, 2004, 08:58:44 am

Sure, there won\'t be any current drained at  the socket, but there must be an opamp of sorts running, and that will take a small standby current.

Title: Headphone socket powered up even when Z is suspended?
Post by: omega on June 04, 2004, 09:07:52 am

Plus, if you wish to follow this line of thought, when there is nothing in the headphones socket, then the output is directed to the internal speaker.