Question about Compaq PS110 Computer Speakers

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What is the polarity of the dc power supply jack?

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The foremost (point) is positive and the latter negative.

Posted on Apr 28, 2010

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SOURCE: Need to know polarity of power supply for JBL

Look where the plug goes in
There will be a C shape with a dot in the middle. Follow the line attached to the dot and you will see a + or - which is the polarity. Next you need to know Voltage. Look in the same area, or on the label for this info. If there is NO info by the power plug, it might be AC, which has no polarity - just plug it in. The label may have this information and will say something like 12VDC or 12VAC that is the key. DC Matters (+ and -) AC does not.

Posted on Mar 26, 2009

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http://support.dell.com/support/edocs/dta/acs5/

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