I have a Samsung R580 notebook in very good condition, when I test the
power supply I get very low (0.6V) voltage on the pin and also on the
inner barrel. (The plug has earth on the outer barrel and then a
separate line on the inner barrel and also a central pin, again
separate) I assume the pin is a sense pin that *may* only ramp the V
up when the unit is connected?

When I connect the adapter with the unit dismantled I get no voltage
across any of the pins on the DC IN plug.

Do you suppose this is a faulty power supply or is the fault with the
laptop?

I'm considering just using a separate 19v adapter but am uncertain as
to whether the V+ should be on the centre pin or the inner barrel.

On Jul 16, 5:48*pm, "Craig ." wrote:
I have a Samsung R580 notebook in very good condition, when I test the
power supply I get very low (0.6V) voltage on the pin and also on the
inner barrel. (The plug has earth on the outer barrel and then a
separate line on the inner barrel and also a central pin, again
separate) *I assume the pin is a sense pin that *may* only ramp the V
up when the unit is connected?

When I connect the adapter with the unit dismantled I get no voltage
across any of the pins on the DC IN plug.

Do you suppose this is a faulty power supply or is the fault with the
laptop?

I'm considering just using a separate 19v adapter but am uncertain as
to whether the V+ should be on the centre pin or the inner barrel.

OK perhaps I was imagining it but now when I test there is only 0.05V
sometimes on the inner barrel, the rest is 0. Sounds like a cactus
power supply? But how do I know which line is meant to be V+? Will
dismantle the power supply brick (man that's a pain!).

Den 16-07-2011 10:08, Craig . skrev:

But how do I know which line is meant to be V+? Will
dismantle the power supply brick (man that's a pain!).

Put the brick in the freezer for a while then the joint becomes brittle
an the rest is pure fun :-)

--
Uffe Bærentsen

On Sat, 16 Jul 2011 00:48:26 -0700 (PDT), "Craig ."
put finger to keyboard and composed:

I have a Samsung R580 notebook in very good condition, when I test the
power supply I get very low (0.6V) voltage on the pin and also on the
inner barrel.

It may help to examine the circuit diagrams of other Samsung
notebooks:
http://www.4shared.com/dir/0S3W-zjF/...l#dir=89663252

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

On Jul 17, 7:30*am, Franc Zabkar wrote:
On Sat, 16 Jul 2011 00:48:26 -0700 (PDT), "Craig ."
put finger to keyboard and composed:

I have a Samsung R580 notebook in very good condition, when I test the
power supply I get very low (0.6V) voltage on the pin and also on the
inner barrel.

It may help to examine the circuit diagrams of other Samsung
notebooks:http://www.4shared.com/dir/0S3W-zjF/...l#dir=89663252

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.


Well I dismantled it and it was FILLED with some kind of (flame
retardant?) white gap filler like substance.. I mean it was chock a
block. I assume something has overheated or the goop has physically
brocken something.. I removed the goop as best I could and tried
bridging what looked like a shot fuse but it just popped.. Cut off the
cable and attached it to another 19v psu. lappie goes fine.
thanks!