New Products Flash Sale
Thread Tools
Old Nov 20, 2014, 04:42 AM
Cossacs is offline
Find More Posts by Cossacs
Registered User
Ukraine, Kyiv city, Kyiv
Joined Feb 2007
44 Posts
Discussion
Junsi iCharger 406 DUO and 308 DUO problem - both burned up

I would like to share my experience with Junsi iCharger 308 DUO and 406 DUO. There are nice chargers with very useful color LCD and a lot of charge functions but with only one problem: they both completely burned with unexpected reason.

I lost my first Junsi iCharger 308 DUO bought from HobbyKing after 5 months of operation. It was normal Li-Ion 5S 30Ah charge using 24VDC 300Ah battery source. After 1 hour of charging white smoke appeared, PCB board has heated up, DC fan and case plastic were melted. I just forgot about this unpleasant intsindent and never asked for warranty replace.

Second Junsi iCharger 406 DUO i bought from ProgressiveRC burned up just after power on with no battery or even balance/charge plugs attached. DC power source was telecom 27.2V 75A power supply. It was so surprisingly and i decided to understand what's going on. I disassembled iCharger 406 and found two "M1-2" and "M2-2" TO-220 IRF3205Z n-Fets and one 4R7 gate resistor burned out. nFets were shorted, it was impossible to power-on the charger. Unfortunally shorted fets damaged Junsi's proprietary fet's 16-pin driver (short trace between pins found), no chance to fix it without manufacturer parts and i finished my research. Finally Channel 2 of this charger fully works, Channel 1 "Discharge" and "Balance" modes are working. Channel 1 "Charge" mode is not working because of damaged driver i guess (no current flow to battery).

406DUO details: fw 2.15, S/N 1408088048

I would like to make it public discussion with manufacturer (Junsi). I'm completely sure it is hardware/software issue, my expectation is not just simple repair but "bug fixed" in software or hardware release history. I hope this can help other people to avoid $$$ impact for their RC budget but i would like to avoid any conclusions before this story ends.

BR,
Sergiy
Cossacs is offline Find More Posts by Cossacs
Reply With Quote
Sign up now
to remove ads between posts
Old Nov 20, 2014, 08:12 AM
JohnathanSwift is offline
Find More Posts by JohnathanSwift
Suspended Account
Greenland
Joined Mar 2012
9,069 Posts
Where are you?
JohnathanSwift is offline Find More Posts by JohnathanSwift
Reply With Quote  (Disabled)
Old Yesterday, 05:21 PM
bandit002 is offline
Find More Posts by bandit002
Registered User
United States, LA, Springhill
Joined Jul 2012
1 Posts
406 duo burnt up x 2

Hello
Just so you will know, I purchased a 406duo in Nov '14, and before it could be used but a handful of times, it burnt up. Sent it back, they sent my another one, used it once, and the next time I powered it on, it shut down my power supply(could hear a ticking noise), tried another power supply and it shut it down also.
Very frustrated.
David
bandit002 is offline Find More Posts by bandit002
Reply With Quote


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion icharger 308 duo not charging Billigan Batteries and Chargers 1 Oct 30, 2014 11:58 AM
Discussion iCharger 406 duo plpflyboy Batteries and Chargers 12 Jun 02, 2014 02:14 PM
Article iCharger 406 Duo Highlight Jason Cole Batteries and Chargers 23 Apr 23, 2014 10:32 AM
Found iCharger 308 Duo jl33fr33 Aircraft - Electric - Batteries & Chargers (FS/W) 11 Mar 23, 2014 07:57 PM
Wanted looking for iCharger 308 or 4010 duo lw777pilot Aircraft - Electric - Batteries & Chargers (FS/W) 0 Jan 11, 2014 10:22 PM