Whats this?

[Parrot of Doom]

Bridge rectifier?

Anybody got a compatiable product code I can replace it with?

Amp is a Naim Nap90, problem is its only supplying 10VDC to the preamp, instead of 24VDC.

 

[hifienthusiast]

You can buy the same bridge rectifier from Maplins, product code AQ94C. See http://www.maplin.co.uk/Module.aspx?ModuleNo=19088&doy=2m6D for details.

Good luck.

Regards
Hon

 

[Parrot of Doom]

Replaced it, still have problems although the preamp is getting more power. I think the cap is dry, and perhaps the LM317T as well, so I'll replace them both. Might as well do the beads at the same time

 

[Tube_Dude]

Hi Parrot

Isnpect the two orange (tantalum ) capacitors...they usually fail short.

Take them out of the circuit and inspect with a ohmmeter ...

Regards... :MILD:

Jorge

 

[Parrot of Doom]

Just ordered a new LM317T and the large capacitor today, so will try that next. I'll have the beads out at the same time, should be easy to get from Maplin.

 

[Parrot of Doom]

Feck. How odd.

Power the preamp with the 5-pin from the SNAPS, and its happy. Power it from the 4-pin from the SNAPS, its not happy.

Both sockets in the preamp share common rails for 24V and earth, but the 5-pin has 2x24V supplies one of which is isolated to a different part of the preamp's circuit board, so I'm now presuming the preamp has a fault which I have to find, seeing as the poweramp is now working perfectly and supplying a full 24V.

Bugger!

 

[Mr Perceptive]

Parrot of Doom

Blindling obvious, but have you inserted the link plug in the pre-amp when powering it through the 4 pin socket?

The link plug goes in the 5pin socket on the pre-amp and joins the two 24v rails together.

Mr Perceptive (aka davidy on Pistonheads!)

PS you will get a lot more Naim assistance in the Pink Fish Media forum, no offence to Zerogainers!

 

[Parrot of Doom]

I knew I kept that link for some reason or other! God I feel thick.

Oh well, at least the power amp is sorted now