Ricoh D025 Service Manual page 257

Check that all the PCUs are correctly set and that the image transfer belt unit is
correctly set.
Do "Amplitude Control" again after checking the PCUs and image transfer belt
unit.
When the result is still "1" or "2" after checking the PCUs and image transfer belt unit:
Check that the gear unit is installed correctly.
5. Exit the SP mode.
SM 4-81
Drive Unit
D023/D025