revision sticker or ....?

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fvolk
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revision sticker or ....?

Unread post by fvolk » Thu Aug 15, 2019 6:12 pm

The revision B boards have "rev b" sticker under the ram slots.
If there are a bunch of rev A and rev B boards and all have their ram slots occupied this sticker is not visible.

Is there another way to distinguish revisions by just looking at the PCB?

lsc1117
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Re: revision sticker or ....?

Unread post by lsc1117 » Mon Aug 19, 2019 1:40 pm

Hi fvolk,

In the case of Rev B, you can find FCC, CE and KCC mark on the top of the PCB as silkscreen.
But in the case of Rev A, there are no such silkscreens on the top of the PCB, and instead, sticker on the bottom of the PCB.

And the Rev A is a blue in PCB color but, Rev B is more like a deep green.
Please refer to pictures below.
rev.jpg
rev.jpg (243.26 KiB) Viewed 488 times
rev_a.jpg
rev_a.jpg (55.34 KiB) Viewed 488 times
rev_b.jpg
rev_b.jpg (44.6 KiB) Viewed 488 times

fvolk
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Re: revision sticker or ....?

Unread post by fvolk » Mon Aug 19, 2019 2:15 pm

No, all of mine have the FCC CE etc. markings and both appear to be the same PCB color (hard to say through the case).

Which actually makes sense, you can't sell them internationally without the proper FCC CE etc. certification markings.

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Re: revision sticker or ....?

Unread post by lsc1117 » Mon Aug 19, 2019 3:56 pm

Oh, I see. I was mistaken.
Have you updated all of RevA's bios? If so, it's hard to find the difference between Rev A and B. Some resistors, caps and inductors have changed.

fvolk
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Re: revision sticker or ....?

Unread post by fvolk » Sun Sep 01, 2019 2:55 am

Actually, I just figured that even within Rev B the PCB color changes..
h2revb.jpg
h2revb.jpg (58.47 KiB) Viewed 296 times

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Re: revision sticker or ....?

Unread post by odroid » Tue Sep 03, 2019 2:50 pm

The PCB coating color could be slightly different even in the same production batch. :(

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