Rank: Member
Groups: Member
Joined: 1/2/2011(UTC)
Posts: 6
Location: Athens
|
I have a new Buffalo II and IVY IV.
When I turn on the devises I hear loud pops and noise from the left speaker. These strange behaviors disappear when music started. But after 2 hours of music play it come up again with new more annoying phenomena. Now I totally lose the sound from the left speaker for some seconds.
I tried to move the devise and what was really interest, these phenomena comes and goes with the movement. So definitely this is a soldering problem. I checked all of my soldering in the IVY IV but I didn’t find any problem (I done it both; visual check and DMM check).
Any ideas what to check next? (I haven’t check the SMD connections)
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 7/27/2010(UTC)
Posts: 48
Location: Malaysia
Was thanked: 1 time(s) in 1 post(s)
|
Try going over ALL your soldered joints again with a soldering iron. Visual inspection isn't fool-proof.
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 1/2/2011(UTC)
Posts: 6
Location: Athens
|
I did this first. I solder again all of my joints. Then I try visual inspection and next DDM inspection. Everything was soldered fine.
I remove the Buffalo from IVY and I heard the same noise and pops from the left speaker. So the good news until now is that Buffalo II works perfect! I suspect there is problem with the soldering of the opa amplifiers. My major problem is that I don't know how to solder smd parts and to be honest, I am afraid to try it.
Tonight I will try to use an oscilloscope program for my soundcard to find exactly where the problem is. Even then as I said I don't know how I will manage to fix it.
What makes me continue despite the problem is that I removed the cable from the left speaker. The sound delivered from the right speaker was amazing! I just want to enjoy these amazing devises and I am pretty anxious to go for it.
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 5/23/2010(UTC)
Posts: 708
Location: Netherlands
Thanks: 2 times
Was thanked: 48 time(s) in 45 post(s)
|
You simply reflow the solder on all of the legs. This is difficult if you've already built the IVY: a lot of caps are now surrounding the opamps. I had a similar problem, and simply tried it anyway. I wrecked the board, and bought another one. Believe me: it sounds better in stereo.
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 1/2/2011(UTC)
Posts: 6
Location: Athens
|
Tonight I finally found what the problem is. When I tried to touch the pins of IC2 with my probe in order to check the soldering it simply removed! Please check the picture bellow:  It happens probably because it was not soldered correctly. I am afraid to solder smd components; I have never done in the past and I don't want to try it now. Now I am stuck. I am not sure how to fix this..
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 5/23/2010(UTC)
Posts: 708
Location: Netherlands
Thanks: 2 times
Was thanked: 48 time(s) in 45 post(s)
|
Well, it seems like you have little choice: it won't work well in this state. I'd remove the cap next to it (fi. C7) to get some room to work. Then put the opamp in place, and keep it there. This could simply be done with a bit of tape if you can't find tweezers. SMD soldering isn't very hard, you just need to be a little more precise. I found some of the techniques in this video helpful: http://store.curiousinve...ace_Mount_Soldering/101/
|
|
|
|
|
|
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)
|
The solder is already there, so you really just need to touch each leg with your iron.
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 7/27/2010(UTC)
Posts: 48
Location: Malaysia
Was thanked: 1 time(s) in 1 post(s)
|
As Brain said, the solder is already there. All you need to do is to reheat the join with a fine-tipped iron. Set the iron temp to high if you can and wet the tip with a little solder. Then resolder the faulty join with a quick touch of the iron (3 secs at most or until you see the solder melt). I attach two links that will help you learn how to solder smds. If you have weak eyes, use a pair of magnifying spectacles which you can buy at most plastic model making shops. http://hem.passagen.se/communication/pcbsmd.htmlhttp://www.fpga4fun.com/external/SMD/SMDProc.pdf
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 1/2/2011(UTC)
Posts: 6
Location: Athens
|
Well, soldering was not there to all junctions (it was missing in two of them - I think it was 6 & 7) Besides this... DONE!!!  I don't know if my smd soldering looks good but it works! Before soldering the capacitors I checked the smd connections with my DMM to be absolute sure about the soldering. Everything was ok and now after two weeks finally... I enjoy the sound everybody in the DIY forums speaks about! P.S. Bruss, Rian if you need someone to help you with soldering in Europe, count me! :d/
|
|
|
|
|
|
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.
