Original Capacitors

[sparkeeper]

I opened up my Marantz 2270 today and I saw rather large capacitors which are part of the power supply. The brand name on them was "Elna". Could these capacitors be the original capacitors?

 

[bhuskins]

Most likely...post some pictures and I'm sure we can verify for you...look for old brownish glue around the edges as well on the larger caps

 

[mcsew2k]

Most likely...post some pictures and I'm sure we can verify for you...look for old brownish glue around the edges as well on the larger caps

I think bhuskins is speaking of the large caps on the PCBs being glued to the boards. The largest caps are held to the chassis with mounting clamps.

 

[bhuskins]

He said power supply so that's why I suspected he was talking about the large caps on the power supply board and not the main filter caps. Either way pics would help

 

[patfont]

If they say "Elna" they are the originals. Pic would be good though.:scratch2:

 

[sparkeeper]

Some pictures of the caps on my marantz 2270

 

[patfont]

Indeed they are original, and being the grey's I beleive an early version 2270.

 

[KutzlerTrans]

Keep the shells and install the new ones inside of them. Keep it original looking.

 

[sparkeeper]

Keep the shells and install the new ones inside of them. Keep it original looking.

Now my next step is to find a way to discharge them with my capacitor discharge tool. Do I actually have to take the boards apart to get at the bottom solder terminals at the bottom of these capacitors, or is there a better way?

 

[patfont]

There is no need to stuff these for original look, if that is what you want leave them be. From the bottom just cut the tabs close to the bottom of the caps and unscew the 2 screws holding them to the chassis, then remove and take the clamps off. Remember to take a pic, or draw a diagram as to which way they are oriented as "+" and "-" terminals and which wires go to each connection.

Parts Connexion has Nichicon KG 10,000uf 63V 40mm and will fit in original clamps, and have solder terminals which makes life easy.

 

[rBuckner]

Now my next step is to find a way to discharge them with my capacitor discharge tool. Do I actually have to take the boards apart to get at the bottom solder terminals at the bottom of these capacitors, or is there a better way?

They already have a resistor across them that discharges them,they are plenty safe after a couple of minutes.

I don't understand the other question. If you mean does the board have to be removed, usually not - just unscrew them and pull them up a bit to unsolder the caps.

 

[sparkeeper]

There is no need to stuff these for original look, if that is what you want leave them be. From the bottom just cut the tabs close to the bottom of the caps and unscew the 2 screws holding them to the chassis, then remove and take the clamps off. Remember to take a pic, or draw a diagram as to which way they are oriented as "+" and "-" terminals and which wires go to each connection.

Parts Connexion has Nichicon KG 10,000uf 63V 40mm and will fit in original clamps, and have solder terminals which makes life easy.

Thanks a lot for your helpful suggestions. I am quite new to this. When and where are you suggesting I discharge those capacitors? Thank you.

 

[sparkeeper]

They already have a resistor across them that discharges them,they are plenty safe after a couple of minutes.

I don't understand the other question. If you mean does the board have to be removed, usually not - just unscrew them and pull them up a bit to unsolder the caps.

I see. I thought I needed to discharge the caps because I keep reading over and over about "discharging the caps" is so important in order to avoid getting shocked.

So, you are saying that on a Marantz 2270, I can touch anything at all in the receiver as long as it is unplugged and has been unplugged for a day?

Thanks for your help.

 

[rBuckner]

I see. I thought I needed to discharge the caps because I keep reading over and over about "discharging the caps" is so important in order to avoid getting shocked.

So, you are saying that on a Marantz 2270, I can touch anything at all in the receiver as long as it is unplugged and has been unplugged for a day?

Thanks for your help.

A-yup, you got it! Not all equipment has those resistors though so just measure them with a meter to be sure.

 

[sparkeeper]

A-yup, you got it! Not all equipment has those resistors though so just measure them with a meter to be sure.

Thank you.

I'm new to this so please bear with me. Let's say I wanted to measure the voltage in a capacitor with a DMM: is there some trick to getting access to the terminals? It doesn't seem like there is opportunity to place the the tester cables on the leads. Do you have to go through the bottom and hook up to the solder terminals?

 

[rBuckner]

Yes, remove the bottom cover to gain access.

 

[sparkeeper]

Yes, remove the bottom cover to gain access.

Thanks for your help.