Rank: Member
Groups: Member
Joined: 12/25/2013(UTC) Posts: 6  Location: Cocoa, FL
|
Hi. I have a Buffalo IIISE connected to an Ian FIFO and under arduino control. It was working great and sounding better than great in async mode. I wanted to try sync mode and unsoldered the XO reg to stop powering the clock. I had a bit of a hard time removing the reg and I think I may have damaged something.
After removing the XO reg and hooking up the MCK of the FIFO's clock (Si570) the dac stopped producing sound. The lock and mute lights are both on. The display shows the lock frequency to be either 192 or 176 and moves between the two. However, I'm only playing 44/48 material. Before removing the reg in async mode the display showed the correct lock speed.
I put back the reg and removed the MCK u.fl cable, but now the dac behaves the same way as above in , lock and mute lights are on but lock speed displayed is 176 or 192 and no music plays. The XO reg (and the other two regs) show their leds lighted and appear to be working correctly.
So, it seems pretty certain I've damaged something. Is there anything I should check first that might account for this kind of behavior? Also, if I can't fix it, do you offer a repair service for the IIISE board (for pay of course) when the user has inflicted the wound on the device?
I was going to post on the BIII thread at diyaudio, but thought it might be more proper to post the question here. Many thanks in advance and a Merry Christmas to anyone who reads this post!
|
|
|
|
|
|
Rank: Administration
Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN
Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
|
I have never seen such behaviour - unfortunately your probably right that somehow you damaged the chip in your modifications. We don't really do repairs as it is not something we are really equipped to handle efficiently, but if it is only the chip that is bad, they are fairly easy to obtain, and there are places that could do the rework for you.
Sorry for your misfortune.
Cheers!
Russ
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 12/25/2013(UTC) Posts: 6 Location: Cocoa, FL
|
Thanks for the quick answer Russ. I will get a new es9018 chip and see if I can fix it.
When I said I had problems removing the XO reg I meant it was stubborn and I may have overheated some parts when trying to desolder it. But the XO Trident seems to be ok and the es9018 chip is fairly distant from the Trident pins, so I had hopes it was not the damaged item.
Can I ask if there's a chance that I damaged the XO and it is somehow interfering even if it's not powered? I have not removed the XO but was thinking of doing that to see if it has any effect. But if you think it's unlikely, I won't bother.
If I get a new IIISE, is there any possibility of getting it with the XO uninstalled (just included as a loose item with the dac board)?
Frankie
|
|
|
|
|
|
Rank: Administration
Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 2,868
Location: Massachusetts, USA
Thanks: 2 times
Was thanked: 141 time(s) in 134 post(s)
|
Check to see if you are getting 3.3V at the XO pin. Brian Donegan attached the following image(s):  Untitled.jpg (114kb) downloaded 17 time(s).You cannot view/download attachments. Try to login or register.
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 12/25/2013(UTC) Posts: 6 Location: Cocoa, FL
|
Took the XO out, no change. Edited by user Thursday, December 26, 2013 4:05:37 PM(UTC)
| Reason: Not specified
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 12/25/2013(UTC) Posts: 6 Location: Cocoa, FL
|
Originally Posted by: Brian Donegan  Check to see if you are getting 3.3V at the XO pin. Thanks Brian. I'm getting 0v at that pin and 1.5v at the pin below that. This is off the XO pads, since I removed the XO and its Trident reg.
|
|
|
|
|
|
Rank: Administration
Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN
Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
|
Is the trident putting out 3.3V?
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 12/25/2013(UTC) Posts: 6 Location: Cocoa, FL
|
Originally Posted by: Russ White Is the trident putting out 3.3V? Yes, 3.30v out on 5.27v in.
|
|
|
|
|
|
Rank: Administration
Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN
Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
|
That could indicate a broken trace, or a bad joint on the supply pin to the XO.
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 12/25/2013(UTC) Posts: 6 Location: Cocoa, FL
|
Originally Posted by: Russ White That could indicate a broken trace, or a bad joint on the supply pin to the XO. Sorry Russ, I'm a bit dense at times... I measured the voltages at the XO pins without the XO Trident. With the XO Trident (which I'm sure is what you wanted me to measure) it's 3.31v . Sorry about that.
|
|
|
|
|
|
Forum Jump
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.
