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.
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
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.
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?
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.
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
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THANKS for taking time and inform with details and I lerned alot :)
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.
You my - man are stellar! 👍🏻⚡️
Very informative thanks
3:47 props for the @electroboom reference
Nice job
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
I have the same charger but the transformer burned out. So I need to know what voltage is on the secondary of transformer T1.
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.
@@NearFarMedia Thanks, but it is enough for me to measure the voltage, because I no longer have the original transformer.
Thanks for sharing
Does anyone know of a company that services chargers?
My battery charger was broken where can i buy this charger ?
looking for a way to transfer this charger from 110 to 220..
Hi. My problem is the red LED flaşhing, when the battery is not installed. Can you help me please ?
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
Unfortunately, I don't have access to this charger any more. Sorry I can't be of more help.
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?
Hmmm, have you tested the diodes haven't gone open circuit?
@@NearFarMedia - good point, I'll do that
Will a 1.5 18volt charge charge a 2.5 18 volt battery?
I assume so, as long as the voltages match, the larger capacity battery will just take longer to charge than a smaller capacity battery.
I learn a lot on your video. I have the same charger but 110v. Do you know how to convert it to 240v?
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.
You have explained the theory behind an MOV and an Inductor in like 15 seconds
well done i think it was a huge flame combustion
thank you
👏👏👏👏
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.
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
@@lipelego22 That is really helpful, thanks!
fool bridge rectifier!
Please share diagram
My pos machine is not charging please my pos machine problem sholv
can we get to the point guy.damn
Please share diagram