Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
Paul wrote:
> In article <2p8cfsFhvqgbU1@uni-berlin.de>, "Peter Wagner"
> <NG.Basket.PeeWaa@xoxy.net> wrote:
>
Paul,
Thanks for your quick answer.
>
> To be honest with you, I've read many posts on private forums
> where the location of the MB sensor is shown, and I still don't
> know how they find them all. They must be very patient.
>
> Your motherboard has a Winbond 83627 in the upper right hand corner.
My case is closed, so I can only look at the sketch in the manual.
Is the upper right hand corner on the right site of the CPU?
> If you look at the datasheet for the part, there are three
> temperature input pins -
>
> ------------------------------------ Upper right
> | corner of board
> |
> | 6
> | 3 |<-------------Winbond
> (Pin101) Vref ----| 8 | W83627
> (Pin102) Auxtin ----| W |<-- (Pin 1)
> ----------------
> | |
> | |
> Cputin Systin
> (Pin103) (Pin104)
>
> I assume Systin is being used to measure the motherboard temperature.
> You should find a circuit consisting of two things that look like
> resistors. One of them will actually be a thermistor. If you are
> lucky, maybe it will have a slightly different appearance from the
> other components. The sample datasheet below, suggests the thermistor
> could be taller (thicker) than an ordinary resistor. As tall as it
> is wide, a square cross section. An ordinary resistor, like the 10K
> fixed resistor, has a height of about 1/2 its width, so it sits
> flatter to the board. (I just looked at a similar area on my P4C800-E
> and this is magnifying glass work
>
> Vref
> |
> |
> 10K
> resistor
> |
> +------------> Systin (Pin104)
> |
> 10K
> thermistor
> |
> GND
>
> Try tracing the copper tracks, starting from pin 104. Pin 104 is
> second from the left, as shown in the picture above. There are
> a number of resistors feeding off Vref, so starting from that
> end will not help much. Apply gentle heat to the candidate, and
> see if the temp changes.
OK.
Thanks for your hints.
I'll open the case in a few days and than I'll looking for the above
mentioned things.
>
> (Sample SMT thermistor datasheet.)
>
http://www.panasonic.com/industrial/components/pdf/ARG0000CE1.pdf
>
> Good luck,
> Paul
p