Punch Unit; Paper Position Detection - Ricoh Aficio MP2550B Service Manual

These SP codes adjust the punch hole alignment:
SP6128 Adjusts the punch positions in the direction of paper feed.
SP6129 Adjusts the punch position perpendicular to the direction of feed.
For more, see Section "5. Service Tables".

2.12.2 PAPER POSITION DETECTION

The paper position sensor slide motor [A] extends and retracts the paper position slide that
holds the paper position sensor [B].
The paper position sensor detects the position of the paper edge. The detected position of
the paper is used to move the punch unit across to the correct position for punching.
When the paper position slide is retracted, the paper position slide HP sensor [C] detects
when the slider is at home position and stops paper position slide motor.
SM 57

Punch Unit

B793