PROCESS UNIT hp Color 9850mfp 4.2 Cleaning the charging corona unit A. Procedure Note: • The charging corona units are provided for the four colors of yellow, magenta, cyan and black. These units are common. Do not reusea charging corona unit that was once used for another color since it has been stuck with the toner of the other color. 1. Open the toner supply section. (See " 5.1 Open- 2. With the lever [2] of the charging corona unit [1] ing and closing the toner supply section .") pressed down once to the lower right side, pull out the charging corona unit this side for III DIS./ASSEMBLY removal. [1] [2] 3-30