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Thread Tools | Display Modes |
12-25-2019, 01:33 PM
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#1 |
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Member
Join Date: Sep 2018
City & State: Ontario
My Country: Canada
I'm a: Hobbyist Tech
Posts: 84
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Opus BT-C3100 2.2 Problem
Hello all. I am not sure if anyone is familiar with this lithium Ion charger. I have had discharging issues that turned out to be cracked solders for the discharge resistors. This is a 4 bay charger and tester with mah load test. The problem I am having is now bay 2 and 4 will not charge or discharge at all. It goes through all the steps as if it was working but my voltage never changes.
I have tested resistors and diodes and also tried to compare a good working bay with the non working bay but am at a loss. Any help would be great Last edited by Jesse James; 12-25-2019 at 01:36 PM.. |
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12-25-2019, 06:10 PM
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#2 |
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Great Sage 齊天大聖
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 28,106
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Re: Opus BT-C3100 2.2 Problem
complete pcb pictures would help.
i didnt know the opus did a load test, i thought only the Litokala did that. - interesting to know. |
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12-30-2019, 07:44 PM
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#3 |
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Leaking Member
Join Date: Dec 2014
City & State: Atlantic Canada
My Country: Canada
Line Voltage: Ground, 0Hz
I'm a: Hobbyist Tech
Posts: 5,558
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Re: Opus BT-C3100 2.2 Problem
each channel has it's own step down converter on the other side.
https://www.youtube.com/watch?v=JJxrDgEFxMU |
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01-17-2020, 11:16 AM
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#4 |
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Member
Join Date: Sep 2018
City & State: Ontario
My Country: Canada
I'm a: Hobbyist Tech
Posts: 84
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Re: Opus BT-C3100 2.2 Problem
Thanks for the help guys. As far as I can tell the step down converters are ok. I am thinking the gate voltages are wrong on my AO3400A mosfets (not sure) but I think the voltage varies on the amount of charge determined so it confuses me. All I know is at any setting 200ma-1000ma three of the four bays are only charging 30-40ma on my volt meter and when selecting discharge I am getting 0.
Last edited by Jesse James; 01-17-2020 at 11:17 AM.. |
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01-17-2020, 12:00 PM
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#5 |
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Great Sage 齊天大聖
Join Date: Dec 2009
City & State: Europe
My Country: some shithole run by Israeli agents
I'm a: Professional Tech
Posts: 28,106
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Re: Opus BT-C3100 2.2 Problem
fets are voltage not current driven,
maybe there is a bad resistor somewhere - or the computer is running at the wrong clockspeed - fucking the PWM up. |
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01-17-2020, 12:09 PM
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#6 |
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Member
Join Date: Sep 2018
City & State: Ontario
My Country: Canada
I'm a: Hobbyist Tech
Posts: 84
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Re: Opus BT-C3100 2.2 Problem
Ok thanks. If I do find anything I will post it here. Who knows maybe someone else will run into this someday.
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11-16-2022, 02:13 AM
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#7 |
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Tempus fugit
Join Date: Nov 2022
City & State: Masquefa
My Country: Catalonia
Line Voltage: 230VAC 50Hz
I'm a: Knowledge Seeker
Posts: 68
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Re: Opus BT-C3100 2.2 Problem
Hi:
This is the summary I've been facing on this charger so far. Discharge problems: - Replace the six 5.1R SMD resistors from the affected slot. They use to burn after long use. Charging problems: - Check step down converter might be the issue. Wrong Voltage reading: - I am having a slot that reads about the half of the voltage when inserting the battery. I am investigating it.......but so far with no success. If somebody might have an idea, I would appreciate it. Regards, Francesc. |
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