Konica Minolta BIZHUB 501 Service Manual page 665

3. MECHANICAL ADJUSTMENT
36
[1]
[5]
4521f3c018na
Field Service Ver.1.0 May. 2008
8.
When LED3 [5] on FSCB turns ON, rotate VR2 [1]
counterclockwise, and stop VR2 at the position in
which LED3 changes to OFF from ON.