Soundcard Not working...

glasswool · Post by **glasswool** » Wed Apr 09, 2008 7:24 pm

Luna II sound card just makea a clicking sound, nothing works either in Scope 4.5 or XTC mode. The sample rate window shows the samplerate blinking on and off. Anyone know how to fix this prob without sending the card in for repairs?

Post by **garyb** » Wed Apr 09, 2008 7:26 pm

that's a bad sign. try reseating the card in the slot.

glasswool · Post by **glasswool** » Wed Apr 09, 2008 7:59 pm

I did, even installed it on a new pc, same problem...
Any hardware engineers on this forum who can give me tips for a fix? I am based in India, and sending the card to Germany for repairs and back would take too long...

Post by **garyb** » Wed Apr 09, 2008 8:25 pm

if it's broken, you probably have no choice.

arela · Post by **arela** » Wed Apr 09, 2008 11:03 pm

Use a magnifier to inspect all solderings etc.

glasswool · Post by **glasswool** » Thu May 29, 2008 11:21 pm

Hello all,
I changed the low dropout regulator (2318) and the card is now WORKING AGAIN!!!

the19thbear · Post by **the19thbear** » Thu May 29, 2008 11:24 pm

COOOOL! how did you know that was the problem?

capacitor · Post by **capacitor** » Fri May 30, 2008 5:44 pm

Congrats

That must have been interesting to diagnose! Any documentation/tips for the rest of us?

arela · Post by **arela** » Fri May 30, 2008 10:40 pm

well done

Me$$iah · Post by **Me$$iah** » Fri May 30, 2008 10:42 pm

Yup,
I think its fair to say, we're all pretty impressed by this.

well done good sir

hesnotthemessiah · Post by **hesnotthemessiah** » Sat May 31, 2008 1:52 am

glasswool wrote:Hello all,
I changed the low dropout regulator (2318) and the card is now WORKING AGAIN!!!

I was going to mention the low dropout regulator (2318).................

astroman · Post by **astroman** » Sat May 31, 2008 2:28 am

well, it's actually pretty simple...
the only thing you can do about the card, is the powersupply and analog components.
the rest, like the digital processing and custom array logic is out of reach anyway

caps, diodes and regulators are what you focus on - but you definetely need good soldering tools and skills, seriously.
Trying to replace parts maually can render the card useless within seconds, as you might damage (hidden) layer interconnections

good job glasswool

cheers, Tom

Post by **garyb** » Sat May 31, 2008 11:31 am

yes, good job!

siriusbliss · Post by **siriusbliss** » Sat May 31, 2008 1:51 pm

glasswool wrote:Hello all,
I changed the low dropout regulator (2318) and the card is now WORKING AGAIN!!!

dang regulators

PCB power supplies are often susceptible to power spikes (sometimes serve as a sort of fuse), so good catch on the fix, and check your building wiring, etc.

I'm glad it's fixed!

Greg