The "AA" in the model number often denotes the hardware revision, indicating specific onboard capacitors, processor stepping, and power transistor layouts. This matters because — a firmware built for "extra quality" must match the exact hardware stepping to avoid logic errors.
The "AA" in the model number often denotes the hardware revision, indicating specific onboard capacitors, processor stepping, and power transistor layouts. This matters because — a firmware built for "extra quality" must match the exact hardware stepping to avoid logic errors.