Ricoh FT556 Service Manual page 160

7. Adjust the registration by entering a
registration factor using the number keys.
The registration factor can take values
from 0 to 15 as follows:
0
- <------------------------------ > +
1 mm per step
"8" is the factory setting.
Press the C/S key if you need to correct
an entry.
8. Press "#" when you have finished.
8
15
3-31