ThinkPad电源插座转换为USB-C

Thinkpad power plug conversion to USB-C

2023-07-26 06:15:49

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Summary

Thinkpad T460 USB-C conversion

So I did convert my thinkpad T460 from the lenovo rectangular plug to USB-C.

The print may not be perfect in size but you should be able to work it out without difficulty ;)

This conversion make your laptop loose the ability to charge on lower wattage charger than what you configured it to support ! (I'll explain)

In addition to the print, you will need 2 things :

a USB-C PD board like this one : https://www.ebay.com/itm/114517531316?var=414707197432&campid=5338591490&toolid=20012&customid=&mkevt=1&mkcid=1&mkrid=711-53200-19255-0&ufes_redirect=true or similar (I found mine on aliexpress)
a resistor of your choice that will define the wattage supported by the laptop (see the last picture, source for more info : https://www.thinkwiki.org/wiki/Power_Connector#230W_11.5_Amps

The thing is, from now on you laptop will always want to draw the chosen wattage.
For mine i chose 65W since I don't plane to have lower wattage charger. But the safe bet would be 45W.

To tear down you can follow the super nice guide of iFixit : https://www.ifixit.com/Guide/Lenovo+ThinkPad+T460+Charging+Port+Replacement/143012

The wiring is pretty simple : you de-solder the old connector, there are 5 wires : 2 blacks 2 reds 1 white
Solder the 2 blacks on - of your USB-C board
Solder 2 red on the +
You put the resistor between the white cable and the - of your board.

Put everything back together according to iFixit's guide and you're done !

This will work for thinkpad T460, L460 and most likely all the series of the same era. It should fit any thinkpad with the plug with 5 wires.