Ricoh FT3020 Field Service Manual page 159

PHENOMENON ACTION
Dirty background 6. Replace the cleaning blade assembly and/or the cleaning brush if necessary.
CAUTION: Do not forget to dust them with setting powder.
7. Check the exposure lamp position. (See page 6-5.)
8. Adjust the lamp regulator output. (See page 6-65.)
9. Clean the I/D sensor if toner is being scattered inside the machine.
10. If the problem does not improve after doing the above, try changing the
developer.
10-2