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Two 4 pin capacitor on the power amp PC board of my receiver
Two 4 pin capacitor on the power amp PC board of my receiver
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Old 8th November 2018, 10:19 PM   #1
Francisdumas is offline Francisdumas  Canada
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Default Two 4 pin capacitor on the power amp PC board of my receiver

Iím changing the capacitors on my receiver and I found two big capacitors on the power amplifier board. They both have four pins and when I look at the back of the board I found that oly one looks like a dummy. Hi Canít find Anything the Web that looks like that. Somme People talk about 3 pincapacitor that are in fact two capacitors in one with a common negative pin. Is there someone familiar with that kind of capacitor that could help me?
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Old 8th November 2018, 10:44 PM   #2
JMFahey is offline JMFahey  Argentina
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As both label, schematic an PCB layout show, you have a single 2200uF x 35V capacitor.

4 pins?
One of them is positive, other 3 are negative and most probably connected to aluminum case (they *might* float though).

Check for continuity between them.

Why 4?
For mounting and stability.
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Old 8th November 2018, 11:20 PM   #3
jaycee is offline jaycee  United Kingdom
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Two of those pins will be common to one of the terminals. A continuity tester should do to determine which pins are which. You can then simply solder a link wire to make the connection on a regular 2-pin capacitor
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Old 9th November 2018, 02:09 AM   #4
alexberg is online now alexberg
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Most distributors let you choose pin count.
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Old 9th November 2018, 04:00 AM   #5
DUG is offline DUG  Canada
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Probably not helpful but:

Nippon Chemi-Con Corporation / Aluminum Electrolytic Capacitors

The site says replacement series for EW typ is SME.

but it lists it as a :"SCREW-MOUNT TERMINAL REPLACEMENTS"

Then it lists the SME as a "SNAP-IN REPLACEMENTS" and the replacements are SMH / SMM series...Which do not have the same 4 pin pattern as yours.
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Old 9th November 2018, 05:15 AM   #6
tauro0221 is offline tauro0221  United States
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Hi,
If you look at the third picrture inside the capacitor drawing showed in the middle the four connections of the capacitor. The top it is the positive, the bottom it is floating or doing nothing and the middle ones are the ground. Hope it may help
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Old 10th November 2018, 06:12 AM   #7
Francisdumas is offline Francisdumas  Canada
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Thanks to everyone! It was more obvious what it was once remove from the board. Here are some picture of the work done.
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Old 10th November 2018, 12:39 PM   #8
alexberg is online now alexberg
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Also soldermask, the green stuff on PCB, is usually made of epoxy, I would of put a small piece of polyethylene (shopping bag) or PET (plastic bottle) under bare wire or use isolated one.
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Old Today, 02:55 AM   #9
Francisdumas is offline Francisdumas  Canada
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Thanks Alexberg, I changed them for network cable bits.
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