Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

Login


Options
View
Go to last post Go to first unread
branko  
#1 Posted : 11 years ago
branko

Rank: Member

Groups: Member
Joined: 3/23/2010(UTC)
Posts: 53
Location: Germany

Thanks: 1 times
Hi,

just received two new Buffalo 3se dad boards for me and a friend. today we together soldered the parts.
and now one se3 has lock when i connect it to a source (M2tech Highface Usb to spdif) and the other has no lock with the same connections.

already checked and resolderd anything ( three times). all smd-led are working. the voltage measured at the tridents are ok (1,16 v, 3,23 v, 3,23 v) and right position. Terminal blocks measured. led tested.

but only mute is on; no lock?

how to proceed now

thx

branko
Russ White  
#2 Posted : 11 years ago
Russ White

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)
Are you certain our getting a good signal to the DAC inputs?
branko  
#3 Posted : 11 years ago
branko

Rank: Member

Groups: Member
Joined: 3/23/2010(UTC)
Posts: 53
Location: Germany

Thanks: 1 times
Hello,

as we have build two buffalo 3se I had the opportunity to test things by swapping one for the other.
so with one buf there is lock and music is playing well and with the second there is no lock (same signal, power, output stage). I tripple checked things but could not find any fault.
the only thing what is different on the two dac-boards is the soldering of the es9018 chip. on the working buffalo the solder marks are all fine and of sharp contour. on the not locking dac the solder joint pointing to the input-terminals are not of sharp contour they lock a bit "smeary" and I am not sure if there could be some contact? I was only able to see this by an magnifier glass and I will try to take two pictures to show what i see.
otherwise the two buffalos were handled/build with the same care (esd, heat, solder...) this is my 6th buffalo build and did not have such a problem before.

thx

branko

Edited by user 11 years ago  | Reason: typo

branko  
#4 Posted : 11 years ago
branko

Rank: Member

Groups: Member
Joined: 3/23/2010(UTC)
Posts: 53
Location: Germany

Thanks: 1 times
Hi,

here are the two pictures (bad quality, sorry) but you can see the differences.

No lock
Lock
[img=UserPostedImage]Lock[/img]
[img=UserPostedImage]no Lock[/img]

(I have problems attach the images. You can see at: http://s30.postimg.org/yb1va13yo and http://s22.postimg.org/cx93cr8fk)

what now?

Branko

Edited by user 11 years ago  | Reason: corrections

Brian Donegan  
#5 Posted : 11 years ago
Brian Donegan

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)
I don't think that is a problem. The boards were tested with S/PDIF before shipping.

Can you check the voltages at the following locations:

  • At the Reset header, pad nearest the edge of the board.

  • At the chip side of C12 and C15.

  • (Very carefully) At the XO pin near C16. Be very careful not to connect the XO pin to C16 when testing.

Edited by user 11 years ago  | Reason: Not specified

Brian Donegan attached the following image(s):
test_points.jpg (151kb) downloaded 17 time(s).

You cannot view/download attachments. Try to login or register.
branko  
#6 Posted : 11 years ago
branko

Rank: Member

Groups: Member
Joined: 3/23/2010(UTC)
Posts: 53
Location: Germany

Thanks: 1 times
Hi,

the Voltages against gnd are:
Reset 3,26 V
C15 1,16 V
C12 1,16 V
Clock 3,23 V


branko
Rss Feed  Atom Feed
Users browsing this topic
GuestUser
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.