Replacing caps

Posted by: Fisbey on 12 November 2003

Another question - I read on another thread that the caps (I assume capacitors) require replacing on Naim equipment every ten years - is this true?
Posted on: 12 November 2003 by David Stewart
In general it's true that you should expect to replace the power supply electrolytics every 8-10 years. I think some of the other tantalum caps may also get replaced during a factory 'recap'.

David
Posted on: 12 November 2003 by MJSM
Hi Fisbey,

Naim reccomend that all items containing power supplies (as a minimum) should be serviced every ten years or so. This is because electrolytic capacitors can (I say can) leak, and cause havoc in your nice Naim unit.

This is a rule of thumb I believe, since my 250 has just gone in for it's first service (for ONLY that reason) and its 15 years old.

When returned to Naim, as part of a full service, they replace the big electrolytics, and in some of the older equipment, the Tantalum Capacitors (also electrolytic ??), and anything else that looks like its on its last legs, or is likely to break down in the NEXT ten years.

I'd say its generally worth it as I believe that they basically make it 'like new' or as near-to as possible, and as an added bonus, a recent service at Naim enhances the resale value no end.

Hope this helps
Mike
Wink
Posted on: 12 November 2003 by David Stewart
The main reason for replacing electrolytics is that the dielectric degrades with time and particularly heat, causing a gradual increase in the DC leakage path across the capacitor. This reduces its efficiency and increases noise in the system.

David