Minolta Di251 Service Manual page 122

Registration (FD)
+ direction - direction
Di251/Di351
6. Study the illustration on the left and adjust
registration.
[ Registration unit : 1 mm = 24 dots ]
7. Press the Clear key.
8. Press the * key to change the sign to select
either + or -.
9. Enter the numeric value from the 10-Key Pad.
10. Touch [END] to go back to the initial screen.
Make a copy again and check for correct
registration.
I-34 Rev. 1.1.0.0/03.01