We treat Chinese usb sound card
I ordered two USB sound cards for a long time (ibee is listed as "Virtual 5.1 Channel Track Audio Card Adapter"):
But they, for some reason, were afraid of getting "hot" from the PC. As a result, one failed, and the second after the same symptoms and propayka still managed to recover. To this day, it is not removed from the PC and works.
Photo board №1 (without two capacitors (100mkFh10V), they will be discussed below):
However, the second PC was left without sound. I ordered 3 more cards from different vendors. They all came as one (the boards were identical), but not like in version 1. Fee # 2:
When checking it turned out that it works well with monitor headphones and amplifier speakers, but with mobile headphones (earbuds, drops, etc.) there was a lot of noise. Apparently the point is in the resistance, in monitor headphones it is two times higher than mobile, and in an amplifier in thousands +.
If you look at the board number 2, you can see the holes for capacitors C4-C5 (polarity indicated by silk-screen printing), but they are not. Capacitors (100µh10V) were dropped from board 1. I did not immediately pay attention, but the contacts of the capacitors are closed together by a track:
It must be cut, and the capacitors soldered according to polarity.
After the above manipulations, the audio card began to work properly - the noise disappeared.
By the way, the version of the audio card No. 2 turned out to be more resistant to “hot” extraction, although it may still be lucky ...
But they, for some reason, were afraid of getting "hot" from the PC. As a result, one failed, and the second after the same symptoms and propayka still managed to recover. To this day, it is not removed from the PC and works.
Photo board №1 (without two capacitors (100mkFh10V), they will be discussed below):
However, the second PC was left without sound. I ordered 3 more cards from different vendors. They all came as one (the boards were identical), but not like in version 1. Fee # 2:
When checking it turned out that it works well with monitor headphones and amplifier speakers, but with mobile headphones (earbuds, drops, etc.) there was a lot of noise. Apparently the point is in the resistance, in monitor headphones it is two times higher than mobile, and in an amplifier in thousands +.
If you look at the board number 2, you can see the holes for capacitors C4-C5 (polarity indicated by silk-screen printing), but they are not. Capacitors (100µh10V) were dropped from board 1. I did not immediately pay attention, but the contacts of the capacitors are closed together by a track:
It must be cut, and the capacitors soldered according to polarity.
After the above manipulations, the audio card began to work properly - the noise disappeared.
Photos of maps altered in this way:
By the way, the version of the audio card No. 2 turned out to be more resistant to “hot” extraction, although it may still be lucky ...
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Source: https://habr.com/ru/post/226067/
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