Lexmark W820 - Optra B/W Laser Printer Service Manual page 32

4025-Finisher
Drive for Staple
The Stapler Traverse Motor transmits a driving force to the Stapler Drive Pulley. The
rotation of the Stapler Drive Pulley drives the Stapler Timing Belt to move the Stapler Unit
to the left and right.
The Stapler Swing Motor transmits a driving force to the Stapler Swing Gear 1. The
rotation of the Stapler Swing Gear 1 transmits a driving force to the Stapler Swing Gear 2.
Then, the Stapler Swing Gear 2 transmits a driving force to the Sector Gear in the Stapler
Unit, and the Sector Gear swings the Stapler Unit toward +45° or -45° direction.
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Service Manual