Tuesday, January 24, 2017
How to use Asus USB MIR adaptor to other motherboard
How to use Asus USB MIR adaptor to other motherboard
One of my client recently try to use the ASUS USB/MIR REV. 1.11 (the 2 usb port type) adaptor which he got from his old ASUS motherboard to his new computer. His problem is any USB storage device he try to insert in ASUS USB/MIR port a "USB Device Not Recognized" pop-up appear.
The problem is, Asus have fitted filtering on the two data lines to each USB port in the form of a series resistor (10 ohms on one line and 4.7 ohms on the other) and a shunt capacitor to ground at the USB socket end which cause the problem.
The only solution is to remove this filtering by removing the four SMD capacitor (C2, C3, C4, C5). Do not remove C1, C6 and the electrolytics CE1 and CE2. I use hot air rework station to remove those SMD capacitors. After the removal the Asus USB/MIR device recognized any USB flash drive that I inserted.
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