Raspberry Pi Linux Computer Hits Manufacturing Snag
According to a company blog entry, the issue was due to “a hardware parts substitution that was made in the factory by accident: specifically, where we’d specified jacks with integrated magnetics in the BOM and schematics, the factory soldered in non-magnetic jacks.”
Without the magnetic jacks, there could be no network connection. The problem is a relatively easy fix--take off the wrong jack and solder on the right one--but it’s apparently taken the group several days to identify and troubleshoot the problem and ensure that noting else was affected as a result.
Later batches may also be delayed slightly, but the Raspberry Pi team is working hard to make up for lost time. If you’re one of the first in line for your Rasperry Pi, you’ll have to wait just a little bit longer.
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What are we talking about here ? #1 ferrite beads ? #2 inductors ? #3 transformers ? Why are integrated magnetics required ? |
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I'm with 99guspuppet here ; could someone provide futher clarification ?... Henri |
Some clarification here
more details and pics from Raspberry Pi here Manufacturing hiccup
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mhenriday:|
Thanks for the Ars Technica link, rrplay ; I have to confess that before reading the report above I was entirely unaware of the existence of any significant distinctions among RJ-45 jacks ! It would seem that the built-in transformers in magnetic jacks provide DC-isolation and help filter noise. This makes me wonder what sort of ethernet ports are installed on my onw machines - for example my Gigabyte GA-990FXA-UD3 motherboard manual informs me that the board has a single back-panel RJ-45 LAN port (thanks for the info !), but it says nothing about magnetics. Can I just assume that it is, indeed, a magnetic jack ?... Henri |
simply put "no magnetics means no network connection " mention in the above link>>> http://www.raspberrypi.org/archives/781 so.if it is working ...it a safe bet it is. |
Simply put "No magnetics means no network connection." mentioned in the above link http://www.raspberrypi.org/archives/781 so if your ethernet is working it is a safe bet it bet is is. ....nice board by the by way
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Thanks, rrplay, the board seems to be working very well with an AMD Phenom II X4 955 processor and 16 GB RAM ! But if, as the article says, « Henri |
o magnetics means no network connection», why ever are jacks without magnetics produced ? What purpose do they serve ?...
spotted a bit more with magentics &non-magnetics with some of the posts found here like posts #6,7,8 for example for more of an explanation with the Raspberry Pi production ..etc as to the purpose most likely not good enough.. http://www.element14.com/community/message/46809
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Thanks, rrplay, for this link ! As the comments you mention make clear, even non-magnetic ethernet jacks do work - otherwise, as I asked above - what purpose would they serve ? - but not as well or as safely as ones with magnetic transformers. One learns a lot hanging around here on HotHardware !... Henri |
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I really like this website. Nice piece of info. Already bookmarked on my browser...http://gaztech.blogspot.com |
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A bit more of the HH updated info is also here with an explanation of the jack s too http://hothardware.com/cs/forums/p/60544/425754.aspx#425754 oooops ! Where's my manners
@KSonu yep me too ! I & Welcome to HH ! :)
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