Dewalt manuals lost - Dewalt 115-DW7331 - Portable Thickness Planer Attachments Each

Yep, they are all words. I put them in the right order! :>D

No wiring diagram available and no service manual.

https://www.google.com/search?q=dewalt+dc500+wiring+diagram

It should be 110 volts in, and through a transformer to 18 volts output where is meets up with the 18 volt battery socket and from there to the motor.

..

Whats your question?

there are replaceable parts in motor, it must be replaced.
DeWALT DC728 Parts List and Diagram Type 1 eReplacementParts com

look at the manual from manufacturer

Check the switch with a continuity tester.

DeWALT DC500 Type 1 Vacuum Parts

Check the battery contacts... a common problem on this model. they are easily bent and prone to corrosion.

This vacuum has a history of problems with the battery contacts. Check that yours are not bent out of shape or corroded. if they are... straighten them or remove the corrosion.

IT looks like the part number is 429704-56 and the Dewalt site shows list price being $51.68. You should be able to order that filter at a DeWalt dealer in your area, hopefully for a discount.

Otherwise, there is here online:
http://www.ereplacementparts.com/search_result.php?osCsid=2c10ce07c62a161bca9f80f981bf690f

Dewalt Service Center faxed me one!