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 information4-83 7500-XXX Sensor (tray 2 feed-out) removal 1.Remove the MPF rear cover. See “MPF rear cover removal” on page 4-58. 2.Remove the MPF feed unit assembly. See “MPF feed unit assembly removal” on page 4-54. 3.Remove the printer left door assembly. See “Printer left door assembly removal” on page 4-75. 4.Open the printer left lower door assembly. See “Printer left lower door assembly removal” on page 4-70. 5.Remove the two screws securing the tray 2 feed-out sensor guide (A). 6.Remove the tray 2 feed-out sensor guide (A) while pulling on its center most point. 7.Disconnect the connector from the sensor (tray 2 feed-out) (B). 8.Release the hook securing the sensor (tray 2 feed-out) (B). 9.Remove the sensor (tray 2 feed-out) (B). A Left A B Hook Connector
4-84MFP Service Manual 7500-XXX Switch (PC cartridge interlock) removal 1.Remove the printer front left cover. See “Printer front left cover removal” on page 4-3. 2.Remove the top cover assembly. See “Top cover assembly removal” on page 4-5. 3.Remove the PC cartridge. 4.Remove the toner cartridge. 5.Remove the printer front door assembly. See “Printer front door assembly removal” on page 4-6. 6.Remove the front inner cover. See “Front inner cover removal” on page 4-8. 7.Remove the HVPS card assembly. See “High voltage power supply (HVPS) card removal” on page 4-114. 8.Remove the toner cartridge guide assembly. See “Toner cartridge guide assembly removal” on page 4-95. 9.Remove the rear lower cover. See “Rear lower cover removal” on page 4-12. 10.Disconnect the two connectors P403 and P404 from the printer engine card assembly (A). 11.Open the printer left door assembly. 12.Remove the registration roll assembly. See “Registration roll assembly removal” on page 4-79. AP403 P404 ClampConnectors
Repair information4-85 7500-XXX 13.Remove the two screws securing the laser opening guide (B). 14.Release the harness from the clamp on the laser opening guide (B). 15.Disconnect the connector from the laser opening guide (B).B Front
4-86MFP Service Manual 7500-XXX 16.Remove the laser opening guide (B) by lifting it upward then outward in the direction of the arrow. 17.Remove the four screws securing the PC cartridge guide (C). Guide assembly Left view Screws Cover Harness assembly Left Guide assembly D Connector
Repair information4-87 7500-XXX 18.Slide the PC cartridge guide (C) toward the left side and disconnect the connector from the PC cartridge sensor connector. 19.Remove the two hooks securing the transfer roll power contact (E). 20.While pressing the PC cartridge drive coupler (F), lift the front side of the PC cartridge guide assembly (C) upward. 21.Release the harness from the clamp on the rear side of the PC cartridge guide assembly (C). 22.While pressing the PC cartridge drive coupler (F), lower the left side of the PC cartridge guide assembly (C). Hook Hook C ELeft F
4-88MFP Service Manual 7500-XXX Clamps LeftHarness C
Repair information4-89 7500-XXX 23.Lift the right side of the PC cartridge guide assembly (C). Remove the screw (G) securing the switch (PC cartridge interlock) (H) to the PC cartridge guide assembly (C). Remove the switch (PC cartridge interlock) (H). 24.Remove the PC cartridge guide assembly (C) from the printer. Connector C G H Front
4-90MFP Service Manual 7500-XXX Sensor (humidity and temperature) removal 1.Remove the printer front left cover. See “Printer front left cover removal” on page 4-3. 2.Remove the top cover assembly. See “Top cover assembly removal” on page 4-5. 3.Remove the PC cartridge. 4.Remove the toner cartridge. 5.Remove the printer front door assembly. See “Printer front door assembly removal” on page 4-6. 6.Remove the front inner cover. See “Front inner cover removal” on page 4-8. 7.Remove the HVPS card. See “High voltage power supply (HVPS) card removal” on page 4-114. 8.Remove the toner cartridge guide assembly. See “Toner cartridge guide assembly removal” on page 4-95. 9.Remove the rear lower cover. See “Rear lower cover removal” on page 4-12. 10.Disconnect the two connectors P403 and P404 from the printer engine card assembly (A). 11.Release the harnesses from the two clamps. 12.Remove the registration roll assembly. See “Registration roll assembly removal” on page 4-79. AP403 P404 ClampConnectors
Repair information4-91 7500-XXX 13.Remove the two screws securing the laser opening guide (B). 14.Release the harness from the clamp on the laser opening guide (B). 15.Disconnect the connector from the laser opening guide (B). B ConnectorClamps
4-92MFP Service Manual 7500-XXX 16.Remove the laser opening guide (B) by lifting it upward then outward in the direction of the arrow. 17.Remove the four screws securing the PC cartridge guide (D). Guide assembly Left view Screws Cover Harness assembly Left Guide assembly D Connector