Question about Tascam US-122 Sound Card
I'm afraid I've done something stupid. I wrongly attempted to reattach a phantom-powered microphone (Behringer B-1) to the right channel of my US-122 while the phantom power switch was set to "on." Although the input volume level was turned down all the way at the time, I have apparently damaged the right channel. I can no longer obtain sufficient audio levels on that side. Even a guitar plugged directly into the right channel generates very little level. The microphone appears to be undamaged, working as previously when plugged into the left side. The Tascam is beyond warranty coverage, and before I sent it in for repair, I wondered if anyone knows if there is any internal, replaceable fusing in the US-122. If by chance there is, does anyone know how to disassemble this thing without beating it with a hammer? I truly appreciate any suggestions. Thanks.
I have the service manual & have repaired mine. Replace Q1(Left i/p) / Q4(Right i/p). The original Part is 2SK117-BL. Equivalent - BF810, 2N3822, 2SK184. If opamp is also blown - replace U7 - Part no - TLC2272CD. Actually any standard opamp will put it back in service. Care should be taken not to connect / disconnect a device when the sound card is powered up. Disconnect the usb cable first & then connect/disconnect the sound card. Hope this will help. In case of more explanation - [email protected]
Posted on Sep 13, 2013
After a while on the net I could not find anything specific to this issue but I do have a link to the manual. which some tech specs and drawings hope this helps. copy and paste the text below into your internet browser http://www.dgmplaza.co.kr/mart_45/bbs/include/DOWNLOAD.php3?table=pds&l=111&inc=local&f=upfile
Posted on Jul 31, 2007
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