This is shared Avalon A-Series reference material covering 5 models. Components, supply voltage/phase, PSU, cooling and service procedures vary by model and revision. Use the exact model nameplate and OEM manual; shared examples do not establish compatibility.
Firmware is how you upgrade, recover, and optimize a fleet. Stock keeps units on spec; custom firmware (Braiins OS+, Vnish, LuxOS) adds per-chip auto-tuning for better efficiency - at a small dev fee and a voided warranty.
Download the exact-model firmware from support.canaan.io, matching the MM generation. Upgrade via the web UI; never cross-flash a different generation.
Avalon is more locked-down than Antminer, so custom firmware is less common. ePIC's UMC and some third parties support certain models; check compatibility. The main tech takeaway: a re-flashed unit has a different UI/API and a dev-fee line.