This in-depth guide will explain what the drum unit does, why the "2321" message appears, how to perform the reset, and how to ensure your printer continues to produce professional-quality documents.
Open the cover and slide the green tab on the drum unit back and forth several times to clean the corona wire, then try the reset again. When to Actually Replace the Drum Unit reset drum 2321
This manually forces the drum counter to zero. Use this method only if Method 1 did not work. This in-depth guide will explain what the drum
Always inspect your drum physically before resetting. If the prints are clean, reset with confidence. If you see repeating defects, invest in a new drum unit (Brother DR-2355 or DR-630). With proper maintenance and strategic resets, your printer can produce thousands of high-quality pages without constantly demanding new parts. Use this method only if Method 1 did not work