Epson EPL-5900L Reference Manual page 115

11. Clear the photoconductor level counter.
For Windows
Turn on the printer, access the printer driver. Click the
Optional Settings tab, and click Printer Setting. Click OPC
Level Clear, and the OPC Level Clear dialog box appears.
For Macintosh
Turn on the printer, select Chooser in the Apple menu. Click
Setup, and click Printer Settings. Click OPC Level Clear,
and the OPC Level Clear dialog box appears.
Replacing Consumable Products
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