Lexmark X 850 Owners Manual
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Repair information4-313 7500-XXX Duplex media transport rolls removal 1.Remove the duplex unit assembly. See “Duplex unit assembly removal” on page 4-277. 2.Remove the duplex controller card assembly. See “Duplex controller card assembly removal” on page 4-304. 3.Remove the duplex drive gears 28T. See “Duplex drive gear 28 tooth removal” on page 4-283. 4.Remove the hooks of the four bushings (A) securing the two duplex media transport rolls (B) to the duplex unit assembly. 5.Remove the two duplex media transport rolls (B). Note: When removing the two duplex media transport rolls (B), do not touch the rubber surface. Note: When replacing the two duplex media transport rolls (B), do not touch the rubber surface. B Hook A A Hook HookB A Hook ARight
4-314MFP Service Manual 7500-XXX Duplex media center transport roll removal 1.Remove the duplex unit assembly. See “Duplex unit assembly removal” on page 4-277. 2. Remove the duplex controller card assembly. See “Duplex controller card assembly removal” on page 4-304. 3.Remove the hooks of the two bushings (A) securing the duplex media transport center roll (B) to the duplex unit assembly. 4.Remove the duplex media center transport roll (B). Note: When removing the duplex media center transport roll (B), do not touch the rubber surface. Note: When replacing the duplex media center transport roll (B), do not touch the rubber surface. B A Hook Right A Hook
Repair information4-315 7500-XXX Exit 2 removals Exit 2 unit assembly removal 1.Open the printer left door assembly (A). 2.Lift the two levers (B) while pulling the exit 2 unit (C) outward in the direction of the arrow. 3.Remove the exit 2 unit (C). Note: The rear side of the exit 2 unit (C) may require some force to disengage the electrical connector. Note: Before reinstalling, ensure the exit 2 (C) unit is properly aligned and the electrical connector is properly connected. Left C B A
4-316MFP Service Manual 7500-XXX Exit 2 unit docking lever removal 1.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315. 2.Remove the two exit 2 unit docking levers (A) with a prying tool from the brackets (B). Note: When removing the two exit 2 docking levers, ensure the brackets (B) are not bent or deformed. 3.Remove the springs (C) from the brackets (B). Exit 2 left door handle removal FRONT REAR ACBA C B
Repair information4-317 7500-XXX 1.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315. 2.Open the exit 2 unit assembly. 3.Remove two screws securing the upper guide assembly (A) to the exit 2 unit assembly. 4.Remove the upper guide assembly (A). Note: The exit 2 left door handle (B) may become detached. 5.Remove the exit 2 left door handle (B) from the upper guide assembly (A). 6.Remove the spring (C) from the upper guide assembly (A). Note: After reinstalling the upper guide assembly (A), ensure the exit 2 left door handle (B) operates freely. A BC
4-318MFP Service Manual 7500-XXX Exit 2 diverter gate removal 1.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315. 2.Open the exit 2 unit assembly. 3.Remove two screws securing the upper guide assembly (A) to the exit 2 unit assembly. 4.Remove the upper guide assembly (A). Note: The exit 2 access handle (B) may become detached. 5.Remove the spring (C) connecting the exit 2 diverter gate (D) to the upper guide assembly (A). 6.Gently flex the mounting points securing the exit 2 diverter gate (D) to the upper guide assembly (A). 7.Remove the exit 2 diverter gate (D) Note: After reinstalling the upper guide assembly (A), ensure the exit 2 access handle (B) operates freely. Boss AFront A B C D
Repair information4-319 7500-XXX Exit 2 left cover removal 1.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315. 2.Open the exit 2 unit assembly. 3.Release two hooks securing the exit 2 left cover (A) to the exit 2 unit assembly. 4.Move the exit 2 left cover (A) downward and outward in the direction of the arrow. 5.Remove the exit 2 left cover (A). Note: Extra force is required on the rear of the exit 2 left cover to break the seal of the double stick tape. Double stick tape between covers A HookHook
4-320MFP Service Manual 7500-XXX Exit 2 right cover removal 1.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315. 2.Open the exit 2 unit assembly. 3.Remove the exit 2 left cover. See “Exit 2 left cover removal” on page 4-319. 4.Remove the one screw securing the exit 2 front cover (A) to the exit 2 unit assembly. 5.Remove the exit 2 front cover (A). 6.Remove one screw securing the exit 2 rear cover (B). 7.Move the exit 2 rear cover (B) upward and outward in the direction of the arrow. 8.Remove the exit 2 rear cover (B). 9.Release the hook of the exit 2 support strap (C). 10.Gently remove the link (D) from the bracket (E). ED Boss C BPush Hook BossA
Repair information4-321 7500-XXX 11.Gently pry apart, with a flat tip screwdriver, the boss on the right then the one on the left to separate the exit 2 unit assembly into two pieces. Note: The exit 2 unit assembly should be in two pieces. 12.Remove the four screws securing the exit 2 right cover assembly (F) to the exit 2 unit assembly. 13.Release two hooks securing the exit 2 right cover assembly (F) to the exit 2 unit assembly. 14.Remove the exit 2 right cover assembly (F). Square holeHookRearFA HooksB
4-322MFP Service Manual 7500-XXX Standard bin full exit 2 actuator removal 1.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315. 2.Open the exit 2 unit assembly (A). 3.Remove the exit 2 left cover. See “Exit 2 left cover removal” on page 4-319. 4.Remove the exit 2 right cover. See “Exit 2 right cover removal” on page 4-320. 5.Remove the standard bin full exit 2 actuator outer (A) from the spring (B). 6.Release the hooks securing the standard bin full exit 2 actuator inner (C) to the right cover (D). 7.Release the spring (B) from the hook of the standard bin full exit 2 actuator inner (C). D Hook C B Hook Hook D A Slot HookRear Square hole