slot #2 error on "Upgraded Miboxer C4-12" (got replacement unit..)

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lacrimal
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Joined: 10/23/2019 - 11:58
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Location: Poland

hammerJoe wrote:
I didnt open mine so I dont know what it looks like inside.

Miboxer told me that the fact that it didnt show the word ‘FULL’ when the cell was charged that it was faulty and to return it.
Have you noticed that with your V2 especially with NIMH that it doesnt really charge up to 1.50V? On my V2 it usually stops at around 1.38V.
Also it gets messed up with the IR numbers and just shows gibberish instead of numbers.

Looked especially for low voltage finish since several people here said it could be a problem, but no, mine (including slot #2 with reworked IC) charges same on all slots for example four new eneloops finish at 1.52V 0.75A 0.51-0.55mohm.When measured right after eject with multimeter it shows 1.49V. No garbage readings.

lacrimal
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Last seen: 8 months 3 days ago
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Location: Poland

Without surprise,
forced to replace second chip, this time on #1 slot same symptoms, same resolution, fortunately i have still 3 spare parts.
Anyway, beside this charger work great when not broken, I’m not recommending miboxer c4-12 upgrade to any end user not familiar with hot air smd montage.

Sidney Stratton
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Joined: 01/28/2018 - 22:59
Posts: 684
Location: Canada

Sorry to revive an old thread but yesterday my MiBoxer C4-12 slot #1 died.

Bought it some 18 months ago; way past any warranty. tantien11 replaced ME3118A.

eBay listing doesn’t ship Canada. However, AE has Link at ~10 $ shipping.

I’ll try my hand in replacing but what is the underlying failure of the regulator? Is it too weak or another component that overdrives the chip?

Bad phone camera but a picture of the innards. Which is the regulator? Yellow or Red? (I’d have to re-open the unit to check).

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