Gradation Ess - Epson AcuLaser C2900N Service Manual

Chapter 2 Operation of Diagnostic

4.5.10 Gradation ESS

Outputs the gradation pattern of 2 to 100% density on an A4 sheet for each of the four colors.
When a PQ problem occurs, this test isolates the problem to the print process or PWBA ESS by com-
paring the sample chart with the print.
Check result: NG (Check the print process.) OK (Check the PWBA ESS.)
Epson AcuLaser C2900N
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