icharger failures, detail how your icharger failed

[whatever]

heres a pic to show charger is working as good as new, charging 28v pack ( 24v nom) at 2amps, I normally charge at 1amp its 24v 15ahr pack, cannot detect any heat in mosfets by hand at 2amp.
Will do some other tests as need arises later.

 

[whatever]

documenting a turnigy accucell charger with mosfet failure here:
https://endless-sphere.com/forums/viewtopic.php?f=14&t=117166

 

[BlitzKrieg]

Hello All. Could you please help me to repair my icharger 3010B.
Yesterday i used it for charging li-ion batteries. When i tried to measure internal resistance of li-ion cells charger shows string containing rectangles of display units and stopped working. Turning off and on does nothing.
I tried to refresh its firmware. After flashing it starts to working but after few seconds it starts beeping and there is a message on the screen "INPUT VOL ERR OVER VOLTAGE". This error messages means that input voltage is over than 38V as i can read in user manual. But i tried two different sources. Power supply with 15 V and PB battery with 12V.
Looks like some of transistor keys was damaged or maybe micro controller port was burned.
What should i try to check to recognize if the micro controller is OK or not?
Thanks a lot.

 

[whatever]

I would open it up and have a good look around, and smell if any components are blown. Sometimes you can find the culprit by smell and visual inspection. Thats a good place to start, I always hope its just a mosfet has blown.

 

[whatever]

for blitzkrieg
nice video of icharger 3010b repair mosfet, might be useful
[youtube]https://www.youtube.com/watch?v=r_KeVF-M4xQ[/youtube]

 

[whatever]

blitzkrieg
this thread at bottom, guy has replicated your issue of squares in screen
https://www.rcgroups.com/forums/showthread.php?839657-iCharger-1010B-106B-208B-206B-306B-and-3010B/page84

 

[theabsurdman]

My iCharger X12 started playing up a couple of months ago - consistently failing to balance string #8 however long I waited.

Opening it up I found that the 8th (J42cg) FET had blown open-circuit. Not having any replacement transistors, I tried a temporary repair by desoldering #8 and replacing it with #12 but must have messed it up as now when I connect a pack strings #6 and #7 are missing with "connection error".

I've ordered 20x J42cg transistors from China and will replace #6 and #7 (more carefully this time) and hope that fixes it.

I'd be grateful for any suggestions.