I'm servicing the amp on my subwoofer. Each of the two main AC capacitor filters(10mF 80V) have four terminals. The two capacitors are in series. I read the spec sheets on a different capacitor at Mouser and it stated that the two blank terminals should be isolated from either the positive or negative terminals. They are for mechanical support only. Yet, one capacitor has one of its blank terminals connected via a trace with its positive terminal and the negative terminal of the other capacitor. Is this a mistake in the design of the circuit board?
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Last edited by primetime; 10-01-2016, 05:18 AM. -
Re: 4 terminal capacitor is soldered wrong?
These seem to be 2-section electrolytic capacitors. Leave them connected as-is.Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.
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Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
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Re: 4 terminal capacitor is soldered wrong?
get the datasheet.
some have all the extra's connected to "-" and some say "dont connect"Comment
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Re: 4 terminal capacitor is soldered wrong?
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I uploaded 3 pictures on OneDrive. I circled red the position of the two capacitors. I have not been able to find any info on the Soundia Capacitors. So I don't know if they are upto spec or not. But based on my measurements, capacitance is at 9mF, dissipation factor at 2.2, ESR at 100KHz is 0.3 Ω, ESR at 120Hz is 0.4 Ω. Both pretty much measure identically. Looking at spec sheets of Nichicon at Mouser, these Soundia's don't look too good.
It looks like I can use two lead capacitors, but will probably need to glue them down for support.Last edited by primetime; 10-01-2016, 04:17 PM.Comment
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Re: 4 terminal capacitor is soldered wrong?
in that aplication, the most important thing is the ripple current - you want the highest possible.
and that gets expensive,Comment
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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: 4 terminal capacitor is soldered wrong?
When I replace those caps should I solder them as before or should I cut the trace around that blank terminal?Comment
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Re: 4 terminal capacitor is soldered wrong?
you are likely to get ones wih 2 terminals.
are the center holes 10mm apart? - if they are then it's for "snap-in" caps.Comment
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Re: 4 terminal capacitor is soldered wrong?
Yes, center holes are 10mm apart. I'd prefer to get a 4 legged capacitor if I have a choice since it adds extra anchor given the size of the capacitor and the 15" woofer that will be vibrating it. In fact one leg did break a solder joint.
The sub did have hum among other issues. Four other Soundia caps blown. I figured I'll replace all the Soundias.Last edited by primetime; 10-02-2016, 08:28 PM.Comment
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Hi people, I hope this is the correct spot to post this, I'm new to the forum.
I have an RTX 3080 Founders Edition which has a burnt up capacitor (it was in parallel with another capacitor which appears damaged too), so I am hoping to be able to identify the capacitor values and order replacements.
I hope these photos make it clear which component I am referring to:
(yes, the soldering is a bit botched from removing the blown one, I know)
I have found the board schematic (attached), but there does not seem to be a boardview available. I have never... -
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So I replaced it with samxon and rubycon's general capacitor(GP,YXA series).
I know that these capacitor will not last as long as nichicon capacitor... -
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Rubycon YK DataSheet (b... -
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Although my dreamcast now turns 20 years old but it still works. I occasionally have played game with it.
Is this ESR value of polymer capacitor correct?...
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