Repair 82002A charger?

[Paul Berger (Canada)]

Well at the end, unloaded, between the center (Gnd) and the + there should be about 16V and from Gnd to the unmarked pin 5V and you should see similar voltages inside where the wires connect to the little board. Have you ruled out a broken wire? I would think this would be the most common fault, I find them using the continuity check on the meter, or lowest resistance range to first check the wires end to end and if you find one is open, I locate the break point by pushing a needle through the insulation at various point along the wire, the most likely break points are near the body of the adapter or near the connector. One that I repaired recently had a break in the ground wire near the connector.

If it is not a broken wire let me know and I can take some measurements for you.