Lexmark X 850 Owners Manual
Have a look at the manual Lexmark X 850 Owners Manual online for free. It’s possible to download the document as PDF or print. UserManuals.tech offer 166 Lexmark manuals and user’s guides for free. Share the user manual or guide on Facebook, Twitter or Google+.
Repair information4-193 7500-XXX ADF feed-out roll assembly removal 1.Remove the ADF unit assembly. See “ADF unit assembly removal” on page 4-159. 2.Open the ADF left cover assembly. 3.Remove the ADF front cover assembly. See “ADF front cover assembly removal” on page 4-166. 4.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165. 5.Remove the document tray assembly. See “Document tray assembly removal” on page 4-164. 6.Remove the ADF registration motor. See “ADF registration motor removal” on page 4-201. 7.Remove the ADF media feed assembly. See “ADF media feed assembly removal” on page 4-162. 8.Remove the ADF feed drive motor assembly. See “ADF feed drive motor assembly removal” on page 4-172. 9.Lift the separation roll guide assembly to its uppermost position. 10.Remove the actuator/media guide assembly. See “Actuator/media guide assembly removal” on page 4-190. 11.Loosen the screw securing the tension bracket (A) and loosen the registration secondary belt (B) tension. 12.Remove the tension spring (B). 13.Loosen the screw securing the small tension bracket (C). 14.Remove the exit roll drive belt (D). 15.Remove the registration secondary drive belt (E). 16.Remove the plastic clip securing the exit\feed-out roll drive pulley 25/28T (F). 17.Remove the exit\feed-out roll drive pulley 25/28T (F). 18.Remove the bearing 8 mm (G) securing the ADF feed-out roll assembly (H) to the rear of the feed assembly. 19.Remove the plastic clip securing the manual feed drive pulley (I). 20.Remove the manual feed drive pulley (I). 21.Remove the manual feed drive belt (J). 22.Remove the bearing 8 mm (K) securing the feed-out roll assembly to the front of the feed assembly. 23.Move the ADF feed-out roll assembly (H) rearward and upward. 24.Remove the ADF feed-out roll assembly (H).
4-194MFP Service Manual 7500-XXX Warning: Do not touch the rubber surface of the ADF exit roll assembly (G). C DA B F Plastic clipE JIKG HA FrontPlastic clip C
Repair information4-195 7500-XXX ADF separation roll guide assembly 1.Open the ADF left cover assembly. 2.Lift the separation roll guide assembly (A) to it uppermost position. 3.Lift and remove the separation roll guide assembly (A). Note: Extra upward force is required to remove the separation roll guide assembly. AB Rear
4-196MFP Service Manual 7500-XXX ADF exit roll 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.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165. 4.Remove the ADF feed drive motor assembly. See “ADF feed drive motor assembly removal” on page 4-172. 5.Remove the ADF separation roll guide assembly. See “ADF separation roll guide assembly” on page 4-195. 6.Loosen the screw securing the small tension bracket (A) and loosen the exit roll drive belt tension (B). 7.Loosen the screw securing the tension bracket (C), and loosen the registration secondary belt (D) tension. 8.Remove the registration secondary drive belt (D). 9.Remove the tension spring (E). 10.Remove the exit roll drive belt (B). 11.Loosen the set screw securing the damper (F). 12.Remove the damper (F). 13.Remove the plastic clip securing the bushing 6 mm (G) on the front of the feed assembly. 14. Remove the bushing 6 mm (G). 15.Move the ADF exit roll assembly (H) to the rear. 16.Release the hook securing the exit roll drive pulley 20T (I) to the ADF exit roll assembly (H). 17.Remove the exit roll drive pulley 20T (I). 18.Remove the retainer spring (J). 19.Remove the bushing 6 mm (K). 20.Move the ADF exit roll assembly (H) to the rear and then up. Note: Ensure that the small tension bracket (A) is applying adequate tension to the exit roll drive belt (B).
Repair information4-197 7500-XXX 21.Remove the ADF exit roll assembly (H). Front G Plastic clip K B AC Rear E HI Rear BC J D F
4-198MFP Service Manual 7500-XXX ADF transport roll 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.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165. 4.Remove the ADF feed drive motor assembly. See “ADF feed drive motor assembly removal” on page 4-172. 5.Remove the actuator/media guide assembly. See “Actuator/media guide assembly removal” on page 4-190. 6.Remove the e-clip securing the manual feed drive wheel (A). 7.Remove the manual feed drive wheel (A). 8.Remove the manual feed drive belt (B). 9.Remove the e-clip securing the bushing 8 mm (C). 10.Remove the bushing 8 mm (C). 11.Remove the e-clip securing the transport roll drive gear 20T (D). 12.Remove the transport roll drive gear 20T (D). 13.Remove the bushing 8 mm (E). 14.Move the ADF transport roll assembly (F) rearward and upward. 15.Remove the ADF transport roll assembly (F). Warning: Do not touch the rubber surface of the ADF transport roll assembly (F). F EDE-clip ABC E-clip Front
Repair information4-199 7500-XXX Sensor (document set) removal 1.Open the ADF left cover assembly. 2.Lift the document tray assembly. 3.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165. 4.Disconnect the connector from the sensor (document set) (A). 5.Release the hooks securing the sensor (document set) (A). 6.Remove the sensor (document set) (A). AConnector Rear
4-200MFP Service Manual 7500-XXX Sensor (sheet through) removal 1.Open the ADF left cover assembly. 2.Lift the document tray assembly. 3.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165. 4.Disconnect the connector from the sensor (sheet through) (A). 5.Release the hooks securing the sensor (sheet through) (A). 6.Remove the sensor (sheet through) (A). A Rear Connector
Repair information4-201 7500-XXX ADF registration motor removal 1.Open the ADF left cover assembly. 2.Lift the document tray assembly. 3.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165. 4.Remove the access cap (A). 5.Disconnect the connector from the ADF registration motor (A). 6.Remove the tension spring (B) from the ADF registration motor (A). 7.Remove the two screws securing the ADF registration motor (A). 8.Remove the registration main drive belt (C). Note: Before reinstalling the ADF registration motor (A), place the registration main drive belt (C) on the registration main drive pulley 21/54T (D). Note: Ensure that the registration main drive belt (C) is properly routed. Note: To correctly set the registration main drive belt (C) tension, install the ADF registration motor (A) and the tension spring (B) before completely tightening the two screws. AB C Rear ConnectorD
4-202MFP Service Manual 7500-XXX Sensor (document tray width 1) removal 1.Open the ADF left cover assembly. 2.Lift the document tray assembly. 3.Remove the five screws securing the cover (A). 4.Remove the cover (A). 5.Remove the two screws securing the bracket (B). 6.Remove the bracket (B). 7.Remove the connector from the sensor (document tray width 1) (C). 8.Release the hooks securing the sensor (document tray width 1) (C). 9.Remove the sensor (document tray width 1) (C). Note: The sensor (document tray width 1), sensor (document tray width 2), or the sensor (document tray width 3) are all identical. A B C