Erbauer battery charger problem?

Ryobi Circuit Board 001.jpeg


Assuming I've read it right that's a resistor, 0.22 Omhs 1% tolerance and it has well and truly blown. That means you might have a shorted capacitor (the big black thing next to the resistor is a capacitor) somewhere in the circuit which is causing the switching power supply not to switch. This places a constant high current through a relatively small resistor and blows it (I knew that City & Guilds radio amateur course would come in handy - pity it has taken 53 years to be useful!

Basically, it is an electronics repair and as a new charger is somewhat under £20 new (I think) it means that the charger is toast. I don't know if your batteries are, though. Sorry.
 
Thanks, I just thought it was strange that my original charger, after using it many times to recharge the batteries suddenly decided to blow ‍♂️.. and stranger still that the second one (I’d had for 10 mins ) did the same thing in different sockets with different batteries. I’ve since had all 4 of the batteries in the drills and they’ve all got charge in them and working… I’m just a little reluctant to get another charger now and have e the same thing occur ‍♂️.. I suppose I’m going to have to or sell what I have left on eBay or FaceTime Marketplace to get some money towards replacing with another make. thanks to everyone for their advice and replies.
 
Only sorry I couldn't give you better news, but to repair that is a soldering job and by the time you've bought yourself the parts (resistor, capacitor), a soldering iron, a desoldering pump and some solder it will cost more than a new charger. Even then there might be another fault elsewhere which wouldn't show up without some electronics testing knowledge
 
Unscrew the board and check the underside. Some manufacturers 'hide' a couple of components from obvious view.
You may even see burn marks under the cappy connections or other components.
 
Thanks.. but to tell you the truth I’m not one for messing about soldering unfortunately.. if it was a straight swap out like a normal fuse then yes I’d do that.. but as said it’s easier and as cheap to buy another charger knowing its caput if I dare
 
Lammy100 said:
Thanks.. but to tell you the truth I’m not one for messing about soldering unfortunately.. if it was a straight swap out like a normal fuse then yes I’d do that.. but as said it’s easier and as cheap to buy another charger knowing its caput if I dare
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you probably wont have to solder the actual fuse that is very unusual but have come across it
internal fuses blowing is extremely unusual perhaps one in a hundred or a thousand at worst but you have 2 out off two so so unusual so buying another charger may or may not work ??
there is something bizarre and unusual happening here that you need to try the cheap options as next to no cost rather than assume another charger will work ???
yes indeed it may work but then by number 4 or 5 chargers your plan will change iff not sorted
but 2 batteries causing 2 faults on two unconnected setups means bad design or known problem
what age are all the batteries new and recently aquired ???
in general quality will last at a diminishing rate for perhaps 5-10 years
cheaper perhaps half that
 
B-A, there's a resistor which has blown, so even if it is also the fuse, that resistor (and possibly other components) does need to be replaced and that will require soldering (note the chunk out of it)

Ryobi Circuit Board 001.jpeg
 
good picture that (y)
45 years ago i took my trio 35 w per channel stereo single amp to comet for repair as a resitor had blown and gone black
they replaced the fuse and charged me 35 squid and it worked 'after that now i never assume discoloured components have failed and try a fuse :D
 
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well the brand new charger should be taken back and asked for a replacement! It was a faulty unit sold as working.
 
It was bought privately and when plugged in the green light came on. It was when I put the battery in that it blew. The seller would not have known if it was ‘faulty’ otherwise if he’d used it it would have done the same ‍♂️.. I’m guessing it had something to do with my supply .. especially since the exact same thing happened to my own charger that I’d had and used for years.
 
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