Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › presonus firebox died
New Posts  All Forums:Forum Nav:

presonus firebox died - Page 2

post #16 of 27

deleted


Edited by tangent - 1/11/11 at 12:06am
post #17 of 27

Add me to the list of people that registered here because this exact thing happened to them.  So did any of you guys ever fix your Firebox?

post #18 of 27
Thread Starter 
Quote:
Originally Posted by Hobz View Post

Add me to the list of people that registered here because this exact thing happened to them.  So did any of you guys ever fix your Firebox?



I was waiting for a sample to come from national semiconductor and it never came.  I will try to fix it sometime, but i bought a new interface, so i have kinda forgot about the firebox. 

post #19 of 27

did anyone get their firebox working again? I have the exact same problem. tried replacing the blown capacitor and it just blew again. power led never came on either...

post #20 of 27

I own 2 of these units and they both still work.  One of them was used pretty heavily as a DAC/preamp and was on all the time for at least a few years with no problems. 

post #21 of 27

Hi

 

Just managed to get my Presonus working again, after much the same problem as described in this thread. Couldn't get any help from Presonus (I asked 'em....) so for the good of Presonus kind, here are my experiences in a picture:

 

how I fixed my presonus firebox.jpg

 

Many thanks to the contributors here, who lead me to believe  I could fix it. 

Hope this is helpful.

 

Regards

Greg

post #22 of 27

This is right up my alley. I just had the same issue. Got the Firebox a few years ago (2009-ish). recently, it started getting very noisy. I think I was using only the firewire for power, but not sure. Looked at it eventually, a bit after the noise started, and noticed the power supply connector fell out (maybe when I pulled it out to look at it???). Put it back in and there were more noises. Turned it off (unplugged it). A few days later decided I needed it again and plugged it all back in. POP! Smelled bad too. JUST happened. Going to dig in and find out . . . probably the same thing everyone else found. Sounded and smells like a capacitor. Probably overstressed. Either a too young US engineer designed it, or, more likely, slapped together at some offshore company (will try to hold my tongue here). anyway, more to come...

post #23 of 27

...


Edited by bluessyndicate - 11/7/12 at 12:27am
post #24 of 27
Quote:
Originally Posted by electrobug View Post

Hi

 

Just managed to get my Presonus working again, after much the same problem as described in this thread. Couldn't get any help from Presonus (I asked 'em....) so for the good of Presonus kind, here are my experiences in a picture:

 

how I fixed my presonus firebox.jpg

 

Many thanks to the contributors here, who lead me to believe  I could fix it. 

Hope this is helpful.

 

Regards

Greg

 
 
 
 
 

Greg;

 

Thanks so much for your insightful post, as this appears to be the situation I have.

 

My cap #2 in your diagram likewise exploded and left residue all over.

 

question....I don't see evidence of #1 or #3 being problematic....would #1 also have shown visible signs of failure?

 

I don't see any evidence of failure or heat on #1 or #3.

 

I would particularly like to avoid dealing with #3 since it's SMT which seems like a hassle.

 

Just wondering if I can get away with simply replacing #2 and hoping for the best.

 

Any insights?

 

Thanks!

 

Scott

post #25 of 27

Hi

 

Firstly - thanks for posting the pic above - I had 3 popped capacitors and thought I'd have a go!

 

- Cap 2 in the image above

- The cap just to the right of it

- The cap directly to the left of 5 - the ICA-0635

 

I replaced these then turned the unit on again, and it blew out another cap on the other side of the board - just outside the image - above the 2 blue resistors top left.
I replaced that one and also capacitor number 1 on the image (for good measure).

 

Good news is - the unit powers up fine now and syncs OK - tested for about 30 minutes or so, and I'm getting some audio out of the headphone port.

 

Bad news is - the audio sounds muffled, and as though the signal is repeated about 3 times - like a delay effect.

 

I've tested on two machines (to be sure it's not a driver or PC issue).

I've tested the headphones via another sound card - they are working fine.

 

Does anyone have any ideas? Would particular components failing cause this effect?

 

Thanks in advance for any advice... I was excited for a  moment thinking it was fixed... so close... ;)

 

cheers

 

Nathan


Edited by napes - 12/22/12 at 4:34am
post #26 of 27

Hi All!

 

Just wanted to thank everyone on this thread especially 'tangent' and Greg as I successfully fixed my FireBox tonight after studying the information here and ordering the parts.

 

Tangent's online Soldering videos are excellent and should surely be used in electronics classes! I would never have thought I could have soldered that transistor which is extremely small but his video's made it possible.

 

-James

post #27 of 27

Hey, thanks James. I'm glad the tutorials were helpful to you.

New Posts  All Forums:Forum Nav:
  Return Home
Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › presonus firebox died