Battery Drill Charger Repair

In this video, I repair a battery charger for a battery drill.
It was supplied with 200V, but is only rated to 100V, something went pop...

[@henrikjonsson4340]

THANKS for taking time and inform with details and I lerned alot :)

[@logancharles9935]

You my - man are stellar! 👍🏻⚡️

[@Edmorbus]

Thanks for sharing

[@ecsyntric]

3:47 props for the @electroboom reference

[@diykhan]

Very informative thanks

[@user-jr8gp2en9b]

Nice job

[@bryanroupe8646]

I'm in America and I have the same old charger, but mine is lacking the piece that blew in this one. You should do a video on cleaning this thing up for someone to use as a small psu, if thats even possible. I love playing around with ac/dc converters for some weird reason. It started a few years ago when I decided I wasn't spending a fortune on a good home audio set up, and built my own with car audio equipment/12vdc, and so I had to figure out how to spark that up. Trial and error, few pops and close calls but still here lol.

[@thedutchretrogamer]

well done i think it was a huge flame combustion

[@thedutchretrogamer]

thank you

[@semihduyar]

Hi. My problem is the red LED flaşhing, when the battery is not installed. Can you help me please ?

[@vinceyreay]

I have the same charger, except 240v UK model - it stopped charging for no apparent reason but has not suffered the issues as described in this video...it did have some darkened witness marks on the other side of the heat sink around transistors at R5/6/7 - I replaced them all like for like but still no joy, are there any other common faults associated with this charger?

[@NearFarMedia]

Hmmm, have you tested the diodes haven't gone open circuit?

[@vinceyreay]

@@NearFarMedia - good point, I'll do that

[@mikepowers7829]

How do you replace a fuse in a 18 volt hitachi charger , no light at all Thank Can you do a continuity test on the fuse to see if it’s bad. And how do you replace a fuse Thanks

[@jacobd3290]

You have explained the theory behind an MOV and an Inductor in like 15 seconds

[@andrewmartin4005]

Does anyone know of a company that services chargers?

[@vaclavkostka8000]

I have the same charger but the transformer burned out. So I need to know what voltage is on the secondary of transformer T1.

[@NearFarMedia]

I'll have to see if I can get access to the charger to open it up again, although as it is a switch mode power supply, you'll also need to know number of turns of each winding, wire gauge, bobbin size and type, and the permeability of the core. It's probably easiest to unwind your transformer and count the turns and rewind it the same with the same thickness wires. It is most probably purpose built so you won't find a replacement for sale anywhere.

[@vaclavkostka8000]

@@NearFarMedia Thanks, but it is enough for me to measure the voltage, because I no longer have the original transformer.

[@gatonetworks8731]

Hi, my fet and R 7 and R8 and R3 were damaged, could you help me with the values of the resistors and the fet te or agardecieria thank you very much

[@NearFarMedia]

Unfortunately, I don't have access to this charger any more. Sorry I can't be of more help.

[@stavferrera5643]

looking for a way to transfer this charger from 110 to 220..

[@henriqueroque3701]

I replaced the fuse and a capacitor on my DeWalt charger but it keeps blowing the fuse, don't know what else could be damaged.

[@lipelego22]

maybe the rectfying diodes had a short circuit, it usually happens when you plug PSUs in wrong voltage outlets, also, the switching mosfet of the primary or the schottky diode of the secondary might be blown off

[@henriqueroque3701]

@@lipelego22 That is really helpful, thanks!

[@edwinsantos6681]

My battery charger was broken where can i buy this charger ?

[@knifekitty_ls]

fool bridge rectifier!

[@user-we7jt1mc9d]

👏👏👏👏

[@johnwalters7415]

Will a 1.5 18volt charge charge a 2.5 18 volt battery?

[@NearFarMedia]

I assume so, as long as the voltages match, the larger capacity battery will just take longer to charge than a smaller capacity battery.

[@sumitgupta5193]

My pos machine is not charging please my pos machine problem sholv

[@rwautube]

I learn a lot on your video. I have the same charger but 110v. Do you know how to convert it to 240v?

[@NearFarMedia]

Best way would be with a step-down transformer without reverse engineering the circuit to see if it can handle 240V. At the very least, you'll need to replace MOV's, capacitors, etc to handle the higher voltage, but if it was never intended for 240V use, it could need a complete redesign.

[@nimashisavindya6509]

Please share diagram

[@bradsheppard6407]

can we get to the point guy.damn

[@nimashisavindya6509]

Please share diagram