We have bought this printer,without the scanner unit.We use this machine to print only.To the location that scanner would placed,its a simple cover.From the first month the print jobs appears to have black lines.Every 25000 prints technicians clean the unit called korona.When they clean this unit it print clear,after the next 25000 prints,it needs again clean....The truth is that the the printer is in a call center with 40 people,25 of then smoking..My question is,maybe this problem caused by the missing of scanner unit,the dirt easily reached to corona place...
sorry about my english :/
sorry about my english :/
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