Why does Luxman recommend installing different capacitors?

[olegau]

For some reason, Luxman recommends installing different capacitors C506 and C507 (30000uF x 71V, 15000uF x 63V) in the power supply of Luxman L-503 amplifier. I installed two 22000uF x 80V capacitors. One of them started leaking after 5 hours of using. Possibly bad Chinese quality. Now I have to replace them.

Question. Why does Luxman recommend different capacitors?

Can I install 15000uF x 63V? It is cheaper and smaller, easier to install.

 

[Blue Shadow]

Hitachi HCG FA caps are counterfiet. There is no such cap made by Hitschi.

The power supply has written in that the voltage is 63V. I would want a cap rated to handle more than 63v. The next step up is 71, 75, or 80 depending on supplier. I would see if you can find some caps of adequate voltage and probably more than 15,000 closer to 20,000 or even the 30,000 of the specified cap.

What came out of the unit? Was it a 63/15000 that you replaced with the FA caps? I'd use at least the original size if you know what that was.

 

[olegau]

No idea about original caps. Unfortunately the unit was trashed. Someone took out capacitors and capacitor clamps.

 

[Goldie99]

Question. Why does Luxman recommend different capacitors?

I think you'll find the difference is due to differences between the L-510 & L-530 models (different transformers etc.), e.g., https://www.diyaudio.com/community/threads/transforming-a-luxman-l-510-to-an-l-530-possible.185187/

The differences are not reflected in the schematics you posted - both are showing the L-530 transformer set-up, I assume it should actually differ slightly for the L-510

Alan

 

[olegau]

I think you'll find the difference is due to differences between the L-510 & L-530 models (different transformers etc.), e.g., https://www.diyaudio.com/community/threads/transforming-a-luxman-l-510-to-an-l-530-possible.185187/
https://www.diyaudio.com/community/threads/transforming-a-luxman-l-510-to-an-l-530-possible.185187/
The differences are not reflected in the schematics you posted - both are showing the L-530 transformer set-up, I assume it should actually differ slightly for the L-510

Alan

Thanks for the tips. I see that I have to install a 30000uF x 71V only. It is a hard task to fit big capacitors in a small room.