December 1st, 2021, 9:32
December 1st, 2021, 15:58
December 1st, 2021, 17:22
December 3rd, 2021, 6:20
fzabkar wrote:@Eastcoast, you still need to remove those 4 capacitors.
December 3rd, 2021, 7:03
December 3rd, 2021, 16:50
December 3rd, 2021, 16:58
Amarbir[CDR-Labs] wrote:Yes and No ,Depends on Family
December 3rd, 2021, 17:34
If you don't remove the caps, you end up with a double termination. That results in an impedance mismatch.
December 4th, 2021, 6:31
pepe wrote:wondering what the point is in removing the crystal once you removed the caps...
December 4th, 2021, 9:07
pepe wrote:wondering what the point is in removing the crystal once you removed the caps...
December 4th, 2021, 13:20
ddrecovery wrote:pepe wrote:wondering what the point is in removing the crystal once you removed the caps...
I am not sure what it does. But in some PCBs like the 800035 it is needed.
December 6th, 2021, 11:09
fzabkar wrote:ddrecovery wrote:pepe wrote:wondering what the point is in removing the crystal once you removed the caps...
I am not sure what it does. But in some PCBs like the 800035 it is needed.
Do you mean "810035"?
https://ae01.alicdn.com/kf/H78377fae516c48e785fb7d318bf41898i/WD-2060-810035-000-Unlocked-PCB-Lockless-Circuit-Decryption-Logic-Board-for-WD50NDZW-WD40NDZW-Hard-Drive.jpg
The photo isn't very clear, but after you remove the SATA coupling capacitors, I can't see how the bridge IC can have any impact. The only way the bridge can affect the MCU is if there is an alternative communications pathway between the two chips. Therefore it seems pointless to remove the crystal.
December 6th, 2021, 19:32
ddrecovery wrote:pepe wrote:wondering what the point is in removing the crystal once you removed the caps...
I am not sure what it does. But in some PCBs like the 800035 it is needed.
December 7th, 2021, 10:44
December 7th, 2021, 13:44
ddrecovery wrote:I think this picture is what steered me in the wrong direction.
December 7th, 2021, 13:51
fzabkar wrote:ddrecovery wrote:I think this picture is what steered me in the wrong direction.
1, 2, 3, 5 ???
What happened to 4?
Not sure that I'd want to send my data there:
http://www.datarecovery-china.com/index.asp
December 7th, 2021, 14:37
December 7th, 2021, 14:43
fzabkar wrote:Do you mean E71, E72, E73 and E75?
December 7th, 2021, 15:11
December 7th, 2021, 15:22
fzabkar wrote:ISTM that the easiest way to find the pinout is to find a photo of a SATA PCB with the same MCU and then visually trace the differential pairs from the MCU to the connector.
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