Shorting PIN for 100687658

[shahij]

Hi,

Terminal locks on this one.

which pin to short to get access to Terminal please for the PCB?

100687658

This is the PIC http://www.drivestar.biz/seagate-100687658-p-2804.html

[fzabkar]

If you are referring to shorting the read channel ...

Tip: How to identify the Read Channel test points:
http://malthus.zapto.org/viewtopic.php?f=24&t=123

[dataresc]

Hi Shahij,
I am facing exactly the same problem.
Have you managed to identify the pins for read channel?
Thank you in advance for your prompt reply!

[hhddrec]

Hi,

Terminal locks on this one.

which pin to short to get access to Terminal please for the PCB?

100687658

This is the PIC http://www.drivestar.biz/seagate-100687658-p-2804.html

Not good pic! can you send higth resolution one?

[fzabkar]

http://ep.yimg.com/ay/yhst-444636922352 ... 7658-4.gif

Pins 12 - 18 of J4 are the read/write channel differential pairs. Measure the voltages at each of the pins to determine which is which. Do this with the board removed from the drive. There is a row of 4 corresponding through-holes on the other side of the PCB.