Lexmark X 850 Owners Manual
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Repair information4-173 7500-XXX Inverter solenoid assembly removal 1.Open the ADF left cover assembly. 2.Remove the ADF front cover assembly. See “ADF front cover assembly removal” on page 4-166. 3.Loosen the set screw securing the damper (A). 4.Remove the damper (A). 5.Disconnect the connector from the inverter solenoid assembly (B). 6.Remove the screw securing the inverter solenoid assembly (B). 7.Remove the inverter solenoid assembly (B). 8.Remove the plunger from the inverter lever (C). Note: Before reinstalling the inverter solenoid assembly (B), ensure that the plunger is properly inserted into the inverter solenoid assembly (B) and attached to the inverter lever (C). A Set screw B Connector C Front Plunger
4-174MFP Service Manual 7500-XXX Document set LED removal 1.Open the ADF left cover assembly. 2.Remove the ADF front cover assembly. See “ADF front cover assembly removal” on page 4-166. 3.Disconnect the connector from the document set LED (A). 4.Remove the screw securing the document set LED (A). 5.Remove the document set LED (A). Connector A Front
Repair information4-175 7500-XXX Sheet through actuator removal 1.Open the ADF left cover assembly. 2.Remove the ADF left cover media guide. See “ADF left cover media guide removal” on page 4-181. 3.Remove the ADF feed/pick roll assembly. See “ADF feed/pick roll assembly removal” on page 4-178. 4.Remove the screw from the green ground wire (A). 5.Remove the screw securing the grounding plate (B). 6.Remove the grounding plate (B). 7.Remove the two screws securing the harness guide (C). 8.Remove the harness guide (C). 9.Remove the one screw securing the pick roll position motor assembly (D). 10.Remove the pick roll position motor assembly (D). 11.Remove the one screw securing the rear bracket (E). Warning: Shims may be present under the rear bracket (E) and may possibly fall out. Note the locations of any shims. 12.Remove the rear bracket (E). 13.Gently pry the sheet through actuator (F) out of the ADF left cover assembly.
4-176MFP Service Manual 7500-XXX 14.Remove the sheet through actuator (F). Note: Before reinstalling the rear bracket (E), replace any shims that were originally present. C F A DF E B Spring
Repair information4-177 7500-XXX Sensor (pick roll position HP) removal 1.Open the ADF left cover assembly. 2.Remove the ADF left cover media guide. See “ADF left cover media guide removal” on page 4-181. 3.Disconnect the connector from the sensor (pick roll position HP) (A). 4.Release the hooks securing sensor (pick roll position HP) (A) to the ADF left cover assembly (B). 5.Remove the sensor (pick roll position HP) (A). B A Connector
4-178MFP Service Manual 7500-XXX ADF feed/pick roll assembly removal Warning: Do not touch the rubber surface of the feed roll or the pick roll. 1.Turn the machine off. Warning: To reduce the chance of pick roll position errors and mechanical misalignments, ensure that the machine is turned off when replacing the ADF feed/pick roll assembly. 2.Open the ADF left cover assembly. 3.Remove the ADF left cover media guide. See “ADF left cover media guide removal” on page 4-181. Note: Rotate the rear most white gear of the pick roll position motor assembly until the pick roll is completely lowered and the sector gear is completely disengaged. 4.Release the two springs from the ADF left cover assembly 5.Remove the plastic clip (A). 6.Move the front bushing (B) frontward in the direction of the arrow to remove it from the front bracket (C). 7.Gently pull the front end of the ADF feed/pick roll assembly away from the ADF left cover assembly. 8.Move the rear bushing (D) rearward in the arrow direction to remove it from the rear bracket (E). 9.Gently remove the ADF feed/pick roll assembly (F) from the left cover assembly. Note: Before reinstalling the ADF feed/pick roll assembly (F), ensure that the document set stops are positioned correctly and the two set gates are positioned as shown in the diagram or the ADF will malfunction and jam. Note: Once the ADF feed/pick roll assembly is secured and the plastic clip is installed, rotate the rear most white gear of the pick roll position motor assembly until the pick roll has completely raised. Note: Ensure that the two springs are positioned and installed properly or the ADF will malfunction and jam. Rear white gear Sector gear
Repair information4-179 7500-XXX C B AE D F Set gate Plate
4-180MFP Service Manual 7500-XXX Document set actuator removal 1.Open the ADF left cover assembly. 2.Remove the ADF left cover media guide. See “ADF left cover media guide removal” on page 4-181. 3.Gently pry the document set actuator (A) from the ADF left cover assembly. 4.Remove the document set actuator (A). A
Repair information4-181 7500-XXX ADF left cover media guide removal 1.Open the ADF left cover assembly. 2.Remove the screw securing the ADF left cover media guide (A). 3.Lift the ADF left cover media guide (A) upward, then remove the two bosses from the slot, and remove the two tabs from the holes. 4.Remove the ADF left cover media guide (A). Note: Before reinstalling the ADF left cover media guide (A), ensure that the two bosses and two tabs are correctly installed, or jamming will occur. A Boss TabsBoss
4-182MFP Service Manual 7500-XXX Pick roll position motor assembly removal 1.Open the ADF left cover assembly. 2.Remove the ADF left cover media guide. See “ADF left cover media guide removal” on page 4-181. 3.Remove the document set actuator. See “” on page 4-179. 4.Remove the screw from the green ground wire (A). 5.Remove the screw securing the grounding plate (B). 6.Remove the grounding plate (B). 7.Remove the two screws securing the harness guide (C). 8.Remove the harness guide (C). 9.Disconnect the connector from the pick roll position motor assembly (D). 10.Remove the one screw securing the pick roll position motor assembly (D). 11.Remove the pick roll position motor assembly (D). 12.Remove the harness from the harness guide (C). B A C D Connector