HP LaserJet Enterprise MFP M634, M635, M636 - User Guide

6. Reinstall the tray, and then load full reams of
paper into the tray. The tray holds 2,000 sheets of
paper.
NOTE: For best results, load full reams of paper.
Avoid dividing reams into smaller sections.
7. Close the tray.
ENWW Clear paper jams 191