Each PFU is now equipped with a notch adjustment mechanism to adjust the pressure of the nip between the separation roller and feed roller.
- The rear position [1] is the default, the center position [2] forces more pressure at the nip, and the forward position [3] forces the most pressure at the nip.
- This is a TCRU adjustment and can be done without removing the PFU. (However, Tray 1 must be removed in order to access the PFUs.)
- Do this adjustment if misfeeds and double-feeds become frequent due to slippage caused by the accumulation of paper dust on the separation roller when using coarse paper.
After removing the tandem tray in order to access the adjustment screws, screw [A] is loosened and then lever [B] is pushed forward to move the screw and plate through the notch settings [1] (default], [2], and [3]. The screw is then re-tightened at the selected notch position.
For example, if the screw is set at the forward notch, this applies maximum tension to the spring [1] and stretches it [2]. This raises the lever pressing against the separation roller [3] and creates more pressure at the nip. When the solenoid activates to raise the separation against the feed roller above during paper feed, there is more pressure applied at the nip to handle double feeds.