Hitachi drill charger UC18YKL

[arsharpe]

Hi,

I am fixing the charger (UC18YKL) for a Hitachi battery drill (DV18DCL2) but, as it charges Lithium batteries, I need to know the correct replacement device for the blown (smd) FET2.

As I have spent many hours trying to find a schematic for this DV18DCL2 charger without any luck, does anyone know where I can get one or a parts list?

Thanks in advance for any help,
Rob

[stj]

post pictures of the pcb and control chip

[arsharpe]

Thanks stj for your reply.

Great news 😊

I am a new comer to repairing and at first sight the FET didn't look like it has anything printed on it. However, with some bright light and careful placement of the most powerful magnifying glass I have, it was possible to read the component number.

The number was W2K with 19 positioned vertically at the end and therefore looks like it is a 2N7002K.

Thanks to everyone that viewed,
Rob

[Agent24]

I swear some of these manufacturers mark their parts with colour-shift paint.

[stj]

very fine laser etching - it's only visible at the right angle with a bright light

[CapLeaker]

Most of these tool battery chargers do not have a schematic. Most of the time you don’t need one either in order to fix it. Upload some clear straight shot pics of the board(s). If the FET is shorted, inspect the gate drive circuit.