• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Recapping Marantz 2270... can I use non-polarized main filter caps?

fredb44118

fredb44118

New Member
Hi everyone. One of the main power supply filter capacitors of my 2270 was leaking and causing sound issues, so I've decided to replace both of them. It's probably way overdue.

So I ordered two Mundorf MLytic 10000uf/63VDC caps (http://www.partsconnexion.com/capacitor_ele_mundorf_plugin.html) but now I am realizing that these are non-polarized capacitors.

Do I *have* to use polarized caps, just like the original ones that were used?

What will happen if I install them? Please help. Thank you.
 
Register to hide this ad
Those sure appear to be polarized caps just like the originals. What do you mean by "leaking". The term traditionally refers to electrical leakage, IOW low DC resistance. If the cap has vented or the seal has failed, that's something else, usually called "venting". Then there's the common glue found around the bases, which often becomes corrosive!
 
ConradH said:
Those sure appear to be polarized caps just like the originals. What do you mean by "leaking". The term traditionally refers to electrical leakage, IOW low DC resistance. If the cap has vented or the seal has failed, that's something else, usually called "venting". Then there's the common glue found around the bases, which often becomes corrosive!
Click to expand...

I mean the capacitor is literally leaking - there is a bulge that burst and is now oozing fluid. There's corrosive-looking residue all over it.
 
That's pretty bad! Be sure to check the rectifier diodes as they could either have contributed to a problem or been a victim of it.
 
While the glue Marantz used doesn't seem to be as corrosive as the stuff some other manufacturers used, in my experience, it can become hygroscopic with age and lead to corrosion.
I remove it wherever I find it.

Tom
 
I sure agree although I'll have to look up that word! I did just fix a late 1980's Kyocera receiver that went dead on a local new AKer. There was an open jumper wire down in between the glued down main filter caps which soldered directly into the main circuit board. The glue had corroded the wire as evidenced by light green powder and as it got resistive enough due to the lack of metal, it heated up and open circuited, leaving black phenolic at the weak end. I ended up removing the two filter caps and all glue, which was very brittle, and scraping the black material off and using a drill bit to get it all. I used a fatter jumper and ran it through some teflon tubing and did not use any glue afterwards. It ran like a champ after that!
 
fredb44118 said:
Hi everyone. One of the main power supply filter capacitors of my 2270 was leaking and causing sound issues, so I've decided to replace both of them. It's probably way overdue.

So I ordered two Mundorf MLytic 10000uf/63VDC caps (http://www.partsconnexion.com/capacitor_ele_mundorf_plugin.html) but now I am realizing that these are non-polarized capacitors.

Do I *have* to use polarized caps, just like the original ones that were used?

What will happen if I install them? Please help. Thank you.
Click to expand...


Hi, do you installed the mundorf capacitors??
 
You must log in or register to reply here.
Back
Top Bottom