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| Samsung CM871a - BSY - short points help http://forum.hddguru.com/viewtopic.php?f=10&t=43509 |
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| Author: | Eastcoast [ July 21st, 2023, 8:44 ] | ||
| Post subject: | Samsung CM871a - BSY - short points help | ||
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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| Author: | Eastcoast [ July 21st, 2023, 8:53 ] |
| Post subject: | Re: Samsung CM871a - BSY - short points help |
Eastcoast wrote: 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. |
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| Author: | pepe [ July 21st, 2023, 11:09 ] |
| Post subject: | Re: Samsung CM871a - BSY - short points help |
i would vote for the bottom two. |
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| Author: | Eastcoast [ July 21st, 2023, 11:41 ] | ||
| Post subject: | Re: Samsung CM871a - BSY - short points help | ||
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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| Author: | pepe [ July 21st, 2023, 13:17 ] |
| Post subject: | Re: Samsung CM871a - BSY - short points help |
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 |
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| Author: | Arch Stanton [ July 21st, 2023, 20:58 ] |
| Post subject: | Re: Samsung CM871a - BSY - short points help |
I don't have PC3000. I thought it told you what pins to short? |
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| Author: | Eastcoast [ July 22nd, 2023, 4:44 ] |
| Post subject: | Re: Samsung CM871a - BSY - short points help |
Arch Stanton wrote: 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 |
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| Author: | Eastcoast [ July 22nd, 2023, 4:51 ] | |||
| Post subject: | Re: Samsung CM871a - BSY - short points help | |||
pepe wrote: 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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| Author: | mr44er [ July 22nd, 2023, 23:06 ] |
| Post subject: | Re: Samsung CM871a - BSY - short points help |
-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 |
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| Author: | Eastcoast [ August 1st, 2023, 11:14 ] |
| Post subject: | Re: Samsung CM871a - BSY - short points help |
mr44er wrote: -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. |
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