From: Johannes Wolf (mp2100_at_mail-gw.estec.esa.int)
Date: Fri Sep 05 2003 - 07:43:10 PDT
Very nice and sharp pictures, Ed.
I checked it on my disassembled logic board: both outer (long) pins are
connected to GND.
The target where the pushed in pin from the lower slot is pushing at is most
probaply a test pin. There are a few other test pins in the Vicinity and the
connection is marked with T.....
If the Pin is pushed in that far, it probably does not get any connection to
the iserted card anymore. If it still gets connection to the card, then it
will have GND level via the card from the other GND pin which is still in
place. This GND level might short the signal on the test pin - BUT we are
looking at the lower slot and your problem is with the upper slot as far as
I remember.
As far as Franks answer is concerned - what he is mentioning is the little
contact that you can see easily in line with the card-eject push button.
Especially on the upper slot you can see that easily. The connection to the
logic board is made via two spring contact in the near of the inductor L5
near the NIC port.
If that contact does not work the Newt cannot recognise whether the eject
button is released or not.
But I tend to believe that this is also not the reason for the problem you
have because in the normal position the contact is open and that would be
the same if teh spring contacts are giving bad contact.
Sorry, I do not have not any further idea.
Cheers
Johannes
> -----Original Message-----
> From: newtontalk-bounce_at_newtontalk.net
> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of Ed Kummel
> Sent: Friday, September 05, 2003 7:22 AM
> To: newtontalk_at_newtontalk.net
> Subject: Re: [NTLK] PC slot on 2x00 no longer working
> Thanks Frank. Sometimes pointing out the obvious is
> needed. Unfortunatly, not in this case.
> Thanks for the disassembly pages. It had been several
> months since I got into my Newt...and quite a bit
> longer since I've removed the entire motherboard (it's
> like performing surgery on your own child <although, I
> don't have children, I can only imagine>)
> Well,
> Take a look at what I see when I examine the connector
> part of the PC cards.
> http://newton.tek-ed.com/newt-slot/index.html.htm
> In these images, the right slot is the working bottom
> slot.
> What bothered me is that both slots exhibitted the
> pushed in PC card pin...the exact same pin! Yet the
> bottom slot worked and the upper slot didn't!
> Troubling.
> But I think that these two pictures are quite telling.
> Note this picture:
> http://newton.tek-ed.com/newt-slot/img0002.htm
> of the bottom slot pushed in pin? Note the pad this
> pin is touching? I *think* that this pad leads to the
> same place (?ground?) as the pin went originally.
> Now, note this picture:
> http://newton.tek-ed.com/newt-slot/img0003.htm
> See where this pushed in pin is touching? I think that
> this pad somehow shorts out the entire circuit to the
> Newton. I theorize that ground it probably contacted
> on multiple pins so as long as the pin isn't touching
> anything, or touching ground, the loss of a single pin
> doesn't cause any problems. But since the card has a
> ground from some other pin, this ground travels to
> this pushed in pin an this pushed in pin is in contact
> with something that shorts out (shunting to ground) a
> critical circuit for the upper slot.
> Well, that's my theory and I'm sticking to it...unless
> someone has a better one.
> Although I think Miss Anne Elke's theory on dinosaurs
> is far better...<Monty Python reference to add levity
> to a rather serious subject>
> Can someone with an already opened Newt verify or
> correct me on this? I hesitate to go through "fixing"
> both slots only to find that I broke my bottom slot
> even further.
> Now, I have to clean up...I have Newton guts all over
> my operating gown.
> Ed
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