HP Color 9850mfp Service Manual - Page 199

III DIS./ASSEMBLY hp Color 9850mfp 4.13 Replacing the drum cartridge A. Periodically replaced parts/cycle • Drum cartridge: Every 100,000 copies B. Procedure Note: • The drum cartridges are provided for the four colors of yellow, magenta, cyan and black, and they are all common. However, be sure to avoid reusing a drum cartridge that was once used for a different color since it has been stuck with the toner of that color. 1. Remove the transfer belt unit. (See "4.5 Remov- ing and reinstalling the transfer belt unit.") 2. After raising once both ends [2] of the drum stay U [1], hold them and remove the drum cartridge Y [3]. [8] 3. Remove the drum cartridge M [4], drum car- tridge C [5] and the drum cartridge K [6] in the same manner as in Step 2. 4. Reinstall the above parts following the removal [1] steps in reverse. Note: • When reinstalling each drum cartridge, be sure to check if both ends of the cartridge have been dropped into the grooves of the drum installation blocks F [7] and R [8]. (The drum installation blocks F [7] and R [8] are for yellow drum cartridges. Repeat the steps for other cartridges in the same manner.) • When reinstalling the drum cartridge K [6], be careful that the mylar [9] is not caught up. • Be careful not touch and damage the photosensitive material of the drum with bare hands. • When the drum cartridge is not used for a long period of time, be sure to store it in the dark place with a cover on it (to shield the light). PROCESS UNIT [2] [7] [3] [4] [5] [6] [9] 3-45