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DACs / USB Soundcard based on the CM6207
« on: May 03, 2009, 03:24:13 pm »
A while ago I bought a Trust SC-5500P 5.1 External Soundcard:
This is the circuit board that is inside:
As you can see the circuit board looks pretty straight forward and the raw DAC signals are very easy to find. First I desouldered all the jack's and decoupling caps. Then I shortened the board a bit, because I wanted to put the USB in on the outside of a box and some of the board was in the way (look at the pics and you'll understand).
After this is done you can find the signals as in the picture below:
The +5v can be found on either the USB-in or you can follow 5v line on the board and take it from there. My 5v is the most left green cable on the board.
Now in this threadhttp://www.photonlexicon.com/forums/showthread.php?t=4920&page=3 (post 38) you can find which channel (FL, FR, CEN, SUB, etc) is going to be RGBIXY. James also desribes how to tune all the pots on the correction amp kit.
After all this I put the correction amp kit and the soundcard in a neat aluminium box:
I have not yet tested it with my scanners, but have tested it thoroughly on several scopes. It works fine, but the only problem is that the images are not very stable yet. But it might be that this won't be visible when scanning, but I'd have to try it out. The testing is going to be a problem at the moment since I have broken my ankle this weekend and I am not able to walk for the next few weeks
. If anyone has questions or tips on how to improve this thread please say so!
,Jordy
This is the circuit board that is inside:
As you can see the circuit board looks pretty straight forward and the raw DAC signals are very easy to find. First I desouldered all the jack's and decoupling caps. Then I shortened the board a bit, because I wanted to put the USB in on the outside of a box and some of the board was in the way (look at the pics and you'll understand).
After this is done you can find the signals as in the picture below:
The +5v can be found on either the USB-in or you can follow 5v line on the board and take it from there. My 5v is the most left green cable on the board.
Now in this threadhttp://www.photonlexicon.com/forums/showthread.php?t=4920&page=3 (post 38) you can find which channel (FL, FR, CEN, SUB, etc) is going to be RGBIXY. James also desribes how to tune all the pots on the correction amp kit.
After all this I put the correction amp kit and the soundcard in a neat aluminium box:
I have not yet tested it with my scanners, but have tested it thoroughly on several scopes. It works fine, but the only problem is that the images are not very stable yet. But it might be that this won't be visible when scanning, but I'd have to try it out. The testing is going to be a problem at the moment since I have broken my ankle this weekend and I am not able to walk for the next few weeks
. If anyone has questions or tips on how to improve this thread please say so!,Jordy