Ricoh D104 Field Service Manual page 660

6. Troubleshooting
A loud squeaking noise can be heard when two of the following conditions are met:
• High image coverage
• High original-to-copy ratio (1-to-x)
• Printing at half speed
Cause:
Normally, silica inside the toner is deposited on the drum surface over a long period of time, some of which
is removed by the cleaning blade. However, when two or more of the conditions above are met, the rate
of deposit accelerates, and eventually the blade cannot run across the drum surface smoothly.
Solution:
If this problem is reported, replace the standard spring with the modified spring (P/N AA063690).
Side Effect:
The part life of the PCU may be shortened.
Replacement Procedure
6
1. Remove the front cover [A] from the PCDU (
2. Slide the upper cover [A] of the drum unit as shown and remove it.
658
x 2).