After tracking down the official PDF (Rev. 0, typically), here is what you get:
Without the schematic, you would be guessing which IC to replace, potentially damaging adjacent traces. behringer xenyx qx1202usb service manual
: While the "QX" model (with Klark Teknik FX) lacks a public schematic, the standard Xenyx 1202 schematic is widely available and shares the same analog input/output architecture. Xenyx 1202 Schematics (Scribd) Xenyx 1202 Repair Info (Elektrotanya) Troubleshooting & Common Repairs XENYX QX1202USB/QX1002USB - Thomann After tracking down the official PDF (Rev
offers a look at similar circuit architectures and parts lists that may be useful for general troubleshooting of the Xenyx line. Troubleshooting & DIY Repair Resources Elektrotanya : This community-driven site hosts a service manual for earlier Xenyx models behringer xenyx qx1202usb service manual
: Four high-headroom preamps with phantom power.