Samsung CM871a - BSY - short points help

[Eastcoast]

Hi all, I have this Samsung in. It looks to be BSY. I can see that it's supported by PC3K v 7.1 and above I think.

Can someone help please with confirming short points. I thought it would be lower2 on bottom left but that didn't work.

Many thanks

Louis

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[Eastcoast]

Hi all, I have this Samsung in. It looks to be BSY. I can see that it's supported by PC3K v 7.1 and above I think.

Can someone help please with confirming short points. I thought it would be lower2 on bottom left but that didn't work.

Many thanks

Louis

Actually, I just measured and the bulk of those pins are approx 1.3v, the closest to top is zero, so it may be at the other end. I'll guess I 'll try it later unless someone knows for sure.

[pepe]

i would vote for the bottom two.

[Eastcoast]

Multimeter was wrong or i need glasses.

from top

1) GND
2) NVALUE
3) 1.8v
4) 1.8V
5) 1.8V
6) 1.8V
7) 1.8v

can get drd dsc but not into safe mode when i short pin 7 to GND

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[pepe]

yes, right, those pins are not for ROM mode, one of them is Vref on the bottom.

then idk where ROM mode pins are on this one, perhaps post a pic without label and the other side as well

[Arch Stanton]

I don't have PC3000. I thought it told you what pins to short?

[Eastcoast]

I don't have PC3000. I thought it told you what pins to short?

Yes it does, but I think this model must be an outlier as the pins indicated do not work.

Beginning to think this is a non supported after all. CM871a, might not be the same CM871

[Eastcoast]

yes, right, those pins are not for ROM mode, one of them is Vref on the bottom.

then idk where ROM mode pins are on this one, perhaps post a pic without label and the other side as well

I was trying to find a spec for the Flash chip, but it looks like a Samsung proprietary. I was reading on Ace manual about finding Data pins to short but it's BGA and it's not going to be easy without a proper pin out.

Thanks for taking a look, but likely going to return this to customer as they are leaving for Germany shortly.

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[mr44er]

-000L7 is Lenovo, maybe they have behind their service/paywall specs. Unlikely, but who knows?
I dumped several datasheets https://files.hddguru.com/download/Datasheets/Samsung/ and maybe they contain the info you're searching on a similar model for this CM/PM871

[Eastcoast]

-000L7 is Lenovo, maybe they have behind their service/paywall specs. Unlikely, but who knows?
I dumped several datasheets https://files.hddguru.com/download/Datasheets/Samsung/ and maybe they contain the info you're searching on a similar model for this CM/PM871

Thanks for sharing those. Unfortunately the customer had to collect and take the machine back home to Germany which meant we couldn't look at it further.