Login
Username:

Password:

Remember me



Lost Password?

Register now!

Sections

Who's Online
67 user(s) are online (8 user(s) are browsing News)

Members: 0
Guests: 67

more...

Headlines


Recent Replied Topics
Topic Replies Last Post
AmigaOS4 SonosController - looking for beta testers 17 (593) khayoz Yesterday 23:50
AmigaOS4 Show keys on screen 5 (379) trgswe Yesterday 20:05
AmigaOS4 Reactive C Library 8 (413) rwo Yesterday 19:09
AmigaOS4 Exodus The Last War patching : v0.1 patch on os4depot [1][2][3][4] 79 (3055) kas1e Yesterday 17:42
AmigaOS4 Introducing Profyler [1][2][3] 41 (1939) Kamelito Yesterday 17:13
AmigaOS4 Getting Red Mars to run on AmigaOS 4.1 6 (276) LiveForIt Yesterday 16:03
AmigaOS4 X5000 - GfxBench2D score 4 (157) kas1e Yesterday 11:23
AmigaOS4 Nemo 7 (418) Raziel 1/27 20:47
AmigaOS4 Micro A1-C, overclocking, PCI cards, etc.. 12 (287) sailor 1/27 18:00
AmigaOS4 Is gprof ever works on os4 ? It is! And can be still! [1][2][3] 50 (2257) sTix 1/25 18:58
AmigaOS4 Are 4k screens supported by any AmigaNG compatible gfx-card? 9 (474) nbache 1/24 23:20
AmigaOS4 Cmake and adtools [1][2] 21 (2171) corto 1/24 21:18
AmigaOS4 Did anyone trying to port Valgrind ever ? 19 (5082) corto 1/24 21:05
AmigaOS4 SDL2 [1][2] ... [53][54][55][56] 1111 (332468) Capehill 1/24 18:50
Odyssey Odyssey 1.23 progress: r5 RC2 [1][2] ... [67][68][69][70] 1398 (486019) ktadd 1/23 20:16
[View all topics]  [Forum Settings]
Hardware News : A fix for the audio issue on Sam460ex and AmigaOne 500
Posted by m3x on 2013/2/27 10:47:27 (1721 reads) News by the same author
Hardware News

The problem with the crackling audio on some Sam460ex boards/AmigaOne 500 systems has been identified.

For some reasons, still under investigation, a few boards miss a resistor (R267)
This 0 ohm resistor is responsible for the clock source selection of the AC97 codec, without it the codec runs at a wrong frequency which causes the crackling audio.


If you have a sound quality problem with your Sam460ex board/AmigaOne system, please check if the R267 resistor is in place or not. See this photo from the bottom of the board:

Resized Image

Alternatively the problem may be mitigated with a special sm502.audio driver which minimizes (but not completely removes) the noise. Download and try this alternate driver


Printer friendly page Send this story to a friend
The comments are owned by the author. We aren't responsible for their content.
Author Thread
ChrisH
Published: 2013/2/27 15:29  Updated: 2013/2/27 15:29
Home away from home
Joined: 05/19/2007
From: England
Comments: 3564
 Re: A fix for the audio issue on Sam460ex and AmigaOne 500
Good that the cause of the problem has finally been identified. But I wonder how many Sam460 boards it affects, and how they are going to get fixed...
Hans
Published: 2013/2/28 4:53  Updated: 2013/2/28 4:53
Home away from home
Joined: 01/26/2007
From: New Zealand
Comments: 2310
 Re: A fix for the audio issue on Sam460ex and AmigaOne 500
@ChrisH

ACube's own press release suggests that people contact the reseller that sold them the board. Alternatively, you could find an electronics repair shop. Or, if you're good with a soldering iron, then this would be pretty easy to do yourself.

I did a similar fix to my A1200 years ago.

Hans
Jurassicc
Published: 2013/2/28 19:23  Updated: 2013/2/28 19:25
Not too shy to talk
Joined: 11/27/2006
From: Somerset, UK
Comments: 357
 Re: A fix for the audio issue on Sam460ex and AmigaOne 500
I'm sure FOL @ amigakit or any of the soldering wizards over on amibay would be able to sort people out for those not fealing upto the job.
ddni
Published: 2013/3/1 9:11  Updated: 2013/3/1 9:11
Just can't stay away
Joined: 04/10/2008
From: Northern Ireland
Comments: 1009
 Re: A fix for the audio issue on Sam460ex and AmigaOne 500
This is manufacturer identified fault. Why on earth would anyone risk soldering their own board and potentially damaging it? Is the warranty valid in such situations?

I would be requesting a repair or replacement service from acube or my reseller.
Elwood
Published: 2013/3/1 11:10  Updated: 2013/3/1 11:10
Just can't stay away
Joined: 12/09/2006
From: Lyon, France
Comments: 1341
 Re: A fix for the audio issue on Sam460ex and AmigaOne 500
Why?

Because:
- ACube doesn't have the same budget as HP/Sony...
- it's faster if you do the fix yourself (if you have the skills)
- depending on where you are on Earth, it will cost a lot less doing the fix where you are instead of sending a board back and forth. And faster too!
I know Sam boards have been sold in Japan, Australia...etc. One way ticket for such expensive board is something like 100 euros!!!
ddni
Published: 2013/3/1 11:59  Updated: 2013/3/1 11:59
Just can't stay away
Joined: 04/10/2008
From: Northern Ireland
Comments: 1009
 Re: A fix for the audio issue on Sam460ex and AmigaOne 500
Good point on the postage. What impact will this diy repair have on warranties?
ssolie
Published: 2013/3/1 17:35  Updated: 2013/3/1 17:35
Amigans Defender
Joined: 11/26/2006
From: Canada
Comments: 986
 Re: A fix for the audio issue on Sam460ex and AmigaOne 500
@ddni
Quote:
What impact will this diy repair have on warranties?

You should do as ACube requested and contact your reseller and figure out what works best for you.

That would also mean figuring out how/if any modifications would affect your warranty.

Simple as that.
Hans
Published: 2013/3/1 21:25  Updated: 2013/3/1 21:26
Home away from home
Joined: 01/26/2007
From: New Zealand
Comments: 2310
 Re: A fix for the audio issue on Sam460ex and AmigaOne 500
@ddni
Quote:

This is manufacturer identified fault. Why on earth would anyone risk soldering their own board and potentially damaging it? Is the warranty valid in such situations?

I would be requesting a repair or replacement service from acube or my reseller.


For people like me who live on the other side of the world, sending it all the way back to either ACube or the reseller would be pretty expensive. It would be cheaper for everybody if someone locally did the fix.

I would personally have no issue doing the fix myself because I know how to use a soldering iron. I'm less likely to damage the board than a courier would if it were shipped all the way to Europe and back. Besides, the manufacturer's warranty has already expired for my board.

Of course, someone who isn't confident in their soldering skills shouldn't attempt this.

In my case, the audio already works properly, so I don't have to do anything.

Hans
graffias79
Published: 2013/3/2 19:27  Updated: 2013/3/2 19:27
Just popping in
Joined: 11/25/2009
From:
Comments: 58
 Re: A fix for the audio issue on Sam460ex and AmigaOne 500
Quick & dirty fix: Use a pencil to rub graphite on and between the pads. It works, no soldering required. Just be careful not to touch the other resistors with the "artwork".
COBRA
Published: 2013/3/12 3:47  Updated: 2013/3/12 3:47
Not too shy to talk
Joined: 11/24/2006
From:
Comments: 370
 Re: A fix for the audio issue on Sam460ex and AmigaOne 500
I can also do this fix for people locally (in Auckland) so I think we have it pretty well covered in New Zealand... ;)
General
Site sponsors
Advertise Here

Site statistics
Registered members
  1545
Logged in last:
  24 hours, 54
  7 days, 103
  30 days, 160

Top Posters
1 kas1e
kas1e 7346
2 Raziel
Raziel 4495
3 ChrisH
ChrisH 3564
4 samo79
samo79 3468
5 Chris
Chris 3293
6 orgin
orgin 3227
7 LiveForIt
LiveForIt 3054
8 328gts
328gts 2560
9 Antique
Antique 2503
10 broadblues
broadblues 2310

New Members
Evillord68
Evillord68 01/27/2022
msteed
msteed 01/18/2022
Torque
Torque 01/16/2022
djh0ffman
djh0ffman 01/11/2022
amigaformortals
amigaformortals 01/06/2022
r_amiga
r_amiga 12/20/2021
rjd324
rjd324 12/20/2021
dessy
dessy 12/15/2021
mkegruber
mkegruber 12/13/2021
AJenbo
AJenbo 11/19/2021


Powered by XOOPS 2.0 © 2001-2016 The XOOPS Project