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I have a CTK-518 Casio Keyboard unit, second-hand. The DC Jack went out on it--the metal rod that makes the connection with the adapter simply broke off. So I purchased a new part and installed it, first uninstalling the old part that was soldered onto the board. Initially it still wouldn't work with a normal electrical connection so I then soldered the ends of the new part to the board, also to no avail. I have also checked the integrity of the board itself by connecting--successfully--the unit powered by battery power to an amplifier and indeed getting sound transmission thereby. I therefore conclude that the board itself appears good, but I still have no clue as to why the DC Jack is not allowing electrical connection to occur. Thank you.

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You probably got the WRONG type of jack. Thes jacks have different sizes, including the pin. You probably got one with a smaller sized pin.
These are really a pain to make sure you got the right one.

If you can, verify the pin diameter with a caliper.

ALSO verify the adapter is putting out power FIRST. The forces that broke the jack MAY have destroyed the plug on the cord from the adapter or brolen the cord. Use a voltmeter to verify operation.

If cord is broken, get new plug and replace the plug on the cord that plugs into the unit.

Posted on May 04, 2010


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Posted on Jan 02, 2017


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