Problem 2: Sharp Spots - Ricoh Pro C900 Replacement Manual

3.1.2 PROBLEM 2: SHARP SPOTS

These spots mark the page with very sharp dots at 314 mm (12
in.) intervals in the direction of paper feed.
CAUSE: The drum unit has worn out or the drum is scratched.
NOTE: See the following page for an actual sample. The sample
image is not at 1:1 scale.
Step 1 Print three full-page A3 or DLT sheets in each color (cyan, yellow,
magenta, and black).
Step 2 If these sharp spots appear on the sheets, replace the drum unit.
Step 3 If replacing the drum unit does not solve the problem, call for service.
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