HP Color 9850mfp Service Manual - Page 207

III DIS./ASSEMBLY hp Color 9850mfp 4.18 Removing and reinstalling the process unit A. Procedure 1. Remove the transfer belt unit. (See "4.5 Remov- ing and reinstalling the transfer belt unit.") 2. Remove all of the drum cartridges. (See "4.13 Replacing the drum cartridge.") 3. Remove all of the developing units. (See "4.15 Replacing the developing unit.") 4. Remove the screws [1], 2 each. Note: • When removing the process unit, be sure to remove in advance the transfer belt unit, drum cartridge and the developing unit. • Be careful not to remove black screws. 5. Push back the process unit [6] until it becomes [4] possible to see the screw [5] through each hole [2] [4] of the guide rails L [2] and R [3]. 6. Remove the screws [5], 1 each. [5] Note: • Be careful not to remove black screws. 7. Pull out the process unit [6] again. Then remove it from the guide rails L [2] and R [3] as explained below: The projection [7] on the guide rail L is set into the notch [8] of the process unit. The notch [10] of the process unit is placed on the projection [9] on the guide rail R. Accordingly, slide the guide rail L a little against the process unit to remove it from the guide rail L, and then remove it from the guide rail R by raising the process unit. 8. Reinstall the above parts following the removal steps in reverse. PROCESS UNIT [8] [6] [1] [6] [7] [4] [1] [5] [3] [10] [9] 3-53