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Old Nov 15, 2011, 10:45 AM
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Steven
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United States, CT, East Hartford
Joined May 2010
504 Posts
IBM Bladecenter 2000w PSU DPS-2000BB A Revison S9 voltage control mod.

Revisions S9M and higher for the IBM Bladecenter 2000w PSU DPS-2000BB lack the external voltage control that the S8M and earlier revisions have.

The external voltage control pins(A1 and A2) were left disconnected for some reason in these later revisions.

This internal modification will reconnect the voltage control pins for the S9M and higher revisions and allow for adjustment up to 14.6v.

A rev S8M daughterboard will also work in a rev S9M PS.

Only the 2nd connection highlighted in red needs to be made to the main board.

I did it this way to retain the ability to remove the daughterboard.

An alternative method is to run a jumper wire from the top of the daughterboard to the bottom of the mainboard to connect the same points.

Please use caution when performing this modification !!
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Last edited by xandrios; Nov 17, 2011 at 09:55 AM.
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