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Thread ID: 118856 2011-06-24 01:10:00 Nexstar Hard Drive Dock - incorrect pin-out diagram BBCmicro (15761) Press F1
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1211553 2011-06-24 01:10:00 The power adapter for my dock died so I cut off the connector and soldered it to another adapter I had lying around, using the pin-out diagram on the dead adapter to guide me .

But it didn't work . I opened up the dock and measured the voltages on the circuit board . I got 0, -7, -12 on pins marked 0, +5, +12 . This indicated I had Gnd and +12 reversed . I swapped them and it all worked .

So where had I gone wrong? Turns out the diagram was incorrect:

. dropbox . com/u/32411418/Nexstar_HardDriveDock . jpg" target="_blank">dl . dropbox . com

I mention this in case anyone tries to diagnose one of these adapters by touching a voltmeter to the pins

(To be clear: the adapters are wired the same, it's only the diagram that's wrong on the earlier one)
BBCmicro (15761)
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