Re: Focusrite Saffire Pro 40 re-cap

That's great news! Congratulations. You saved a Pro 40 from the trash can.

Do you have any pics of your completed power supply?

Re: Focusrite Saffire Pro 40 re-cap



Khron,

I have been sourcing new caps for the Pro 40 power supply and the 5 CrapXons on the main board.

All the caps on the power supply are general purpose caps with no impedance data available. As a general rule, is it acceptable to replace general purpose caps with low impedance/low ESR caps of the same value? It seems that many of the better caps (highest ripple & longest life) are low Z. I see that you used some UCC LXV and Panasonic FR series (also low Z) in yours.

In other...

Re: Focusrite Saffire Pro 40 re-cap



Not sure if you're still working on your Pro 40 but I was able to get some of the diode info you requested:

D1, D2, D3, D4 are all RL207

D10 starts with FR10, i can't tell the 5th digit...

Re: Focusrite Saffire Pro 40 re-cap



Sorry for the delay.

I am in the process of recapping my power supply and wrote down the values of the original power supply caps. However, I don't know the diode values. I can check those when I have the unit out of the rack, but I may not be able to get to it for a little while.

Here are the cap values:
C3: 82uF 450V 105C
C11: 470uF 35V 85C
C12: 470uF 35V 85C
C13: 470uF 35V 85C
C14: 470uF 35V 85C
C15: 100uF 100V 85C

I hope this helps. Give me a little...

Re: Focusrite Saffire Pro 40 re-cap



OK, fair enough. You're probably right. I'm going to do the caps and see what happens. Thanks again...

Re: Focusrite Saffire Pro 40 re-cap



That's hilarious! Well, it was 8 years ago when you did the job so you get a pass on that one! Yes, they are nyloc nuts. I thought there might be something under the board that makes them hard to remove.

Sorry to keep bringing it up, but do you think putting heat sinks on the regulators would be worth doing or would it be pointless overkill?...

Re: Focusrite Saffire Pro 40 re-cap

Hi Khron,

Thanks for your reply!



Great. That is what I will do.



To be perfectly honest, I have no idea! LOL. However in your initial write-up you replaced yours seemingly without hesitation so I assumed it was something that ought to be done on general principle.



That makes sense. I thought a higher watt resistor might not dissipate as much heat since it wouldn't be working as hard. I'm learning this as I go, bear with me. Thanks


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Re: Focusrite Saffire Pro 40 re-cap

I hope I'm not committing mortal sin by reviving an old thread on my very first post. If so, my apologies. However, this is the best Saffire Pro 40 component-level discussion anywhere. Hopefully Khron is still keeping an eye on this thread even though he sold his Saffire.

I bought my Pro 40 new in 2015 but haven't used it regularly until recently. Now it has developed a problem that I would like to remedy. After it has been on for about an hour the inputs will get VERY distorted. Extreme distortion with strange harmonics and zero...