Guidance on recapping

[gazmono]

Hi!

I am about to receive delivery of a Sansui qrx-6001 I bought on e-bay nearly two months ago. It was held up by a Canadian postal strike, then took an age to get to the UK by ship.
Anyway, I want to be ready to start re-capping it when it gets through customs.
I can't seem to find a guide to re-capping on this site, but i'm sure there must be one. Quadrockasuarus kindly pointed me towards 'saving the sansui' which gave details on setting the 25volt line, but I need info on re-capping. Do all the caps need replacing or only some types? or only signal path caps?
I would be grateful if someone could point me in the right direction.

Thanks,

Gary

 

[spenceo]

Hi Gary,

You should replace all electrolytic caps. Be sure to pay attention to polarity!! Power supply is always a good place to start. Those circuits have a lot of the larger size caps, which seem to be the ones that go bad first. Main amp out boards also have larger size caps and are a good target for re-capping. One tip that I have learned the hard way, re-cap only one circuit board at a time, then do a full test on the unit to be sure there are no problems. I once re-cap three board together and then had a problem on one channel. Doing that bulk re-cap made it much harder to track down the problem.

Sorry, I don't have any info on the Sansui amps, I'm an Akai man.

Spence

 

[Mr. Poobah]

Have you tried http://www.qrxrestore.com ? Jim seems extremely knowledgeable. Hope this helps.

 

[gazmono]

Thanks guys, really helpfull responses as usual. It looks like I have a bit of work to do but I can't wait to get cracking. By the way, I thought the 'Holy Grail mods only worked on the QRX 9001, but looking at the service manual for the 6001 (which I downloaded off the web), the QS board numbers are the same as those mentioned inj the qrxrestore link, so I take it I can get the benefit of the 'Holy Grail mods on my machine, am I right?