HP Color 9850mfp Service Manual - Page 519
TRIMMER Replacing the Upper and Lower Knives, used in this machine.
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TRIMMER SECTION Q3224A [1] Replacing the Upper and Lower Knives Caution: 1. Be sure to unplug the power cords of the engine, and this machine from the wall 1 out let. 2. Trimming knives (upper and lower) are used in this machine. Be extremely careful in handling these knives. a. Procedure (1) Open the front door and conveyance door. (2) Remove the four screws to detach the top cover. Top cover Screws (5) Remove the three screws to detach the roller cover. (6) Disconnect the relay connector (CN418) and release the wiring harness from cable clamps. (7) Remove the two screws at the front and the two screws at the back to remove the entrance conveyance roller unit. Roller cover Relay connector (CN418) Cable clamps Wiring harness Screws Screws Screws Entrance conveyance driven roller unit Front door Conveyance door (3) Remove the securing screw of cable clamp which holds the power cable, then unplug the the power plug. (4) Loosen the three lower screws, then remove the three upper screws to detach the rear cover. 1 (8) Remove the E-ring and bearing at the front and the E-ring and bearing at the back to remove the trimmer section entrance driven roller. Trimmer section entrance driven roller Upper screws 3 DIS./ASSEMBLY Lower screws (loosen) Front door E-rings Bearings (front and (front and back) back) 3-1