Lexmark X 850 Owners Manual
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Repair information4-233 7500-XXX 2000-sheet dual input (TTM)–tray 4 front cables removal 1.Remove the tray 4 assembly. See “2000-sheet dual input (TTM)–tray 4 assembly removal” on page 4-216. 2.Remove the tray 4 front cover. See “2000-sheet dual input (TTM)–tray 4 front cover removal” on page 4-228. 3.Place the tray 4 assembly on its right side, as shown in the figure. 4.Remove the E-clip with a prying tool securing the front tray lift pulley (A) to the tray lift shaft assembly (B). 5.Remove the front tray lift pulley (A). Note: The tray 4 front cables (C) become detached. 6.Remove the tray 4 front cables (C) from the tray lift shaft assembly (B).
4-234MFP Service Manual 7500-XXX 7.Place the tray 4 assembly back in its upright position. 8.Remove two E-clips with a prying tool securing the two small pulleys (D) on the front of the frame assembly. 9.Remove the two small guides (E) and the two small pulleys (D). 10.Remove the tray 4 front cables (C) from the bottom plates (F). Note: Before re-installing: —It is recommended that all four cables be replaced. —Ensure tray 4 front cables (C) are not twisted or kinked. —Route the cables properly as shown in the figure. —Replace the cables by setting the frame assembly (B) on its side as shown in the figure.
Repair information4-235 7500-XXX 2000-sheet dual input (TTM)–tray 4 media guide rack and pinion removal 1.Remove the tray 4 assembly. See “2000-sheet dual input (TTM)–tray 4 assembly removal” on page 4-216. 2.Place the tray 4 assembly on its right side, as shown in the figure. 3.Remove two e-clips securing the two pinion gears (A) to the frame assembly (B). 4.Remove two pinion gears (A). 5.Remove four screws securing the two rack gears (C) to the frame assembly (B). C E-ring A A CB E-ring
4-236MFP Service Manual 7500-XXX 6.Remove the rack gears (C). Note: Before re-installing, move the two side guides (D) of the frame assembly (B) fully outward before installing the two pinion gears (A). DD
Repair information4-237 7500-XXX 2000-sheet dual input (TTM)–tray 4 media guide lock assembly removal 1.Remove the tray 4 assembly. See “2000-sheet dual input (TTM)–tray 4 assembly removal” on page 4-216. 2.Remove the tray 4 front cover. See “2000-sheet dual input (TTM)–tray 4 front cover removal” on page 4-228. 3.Remove the tray 4 rear cable assembly. See “2000-sheet dual input (TTM)–tray 4 rear cables removal” on page 4-230. 4.Remove the tray 4 front cable assembly. See “2000-sheet dual input (TTM)–tray 4 front cables removal” on page 4-233. 5.Remove the media guide rack and pinion. See “2000-sheet dual input (TTM)–media guide rack and pinion removal” on page 4-223. 6.Move both media guides inward. 7.Lift the front edge of the bottom plate from the tray. 8.Remove the bottom plate (A) from the tray. 9.Remove two screws securing the bracket (B) to the tray. 10.Remove the front media guide (C). 11.Remove the e-clip securing the tray 4 media guide lock (D) to the front media guide (C). 12.Remove the tray 4 media guide lock (D). 13.Remove the spring (E). 14.Remove the tray 4 media guide lock button (F) from the tray 4 media guide lock (D). Note: Before re-installing, ensure the tray 4 media guide lock (D) and the tray 4 media guide lock button (F) are properly installed as shown in the figure. BDF A C E
4-238MFP Service Manual 7500-XXX 2000-sheet dual input (TTM)–tray 4 mylar actuator removal 1.Remove the tray 4 assembly. See “2000-sheet dual input (TTM)–tray 4 assembly removal” on page 4-216. 2.Remove the tray 4 front cover. See “2000-sheet dual input (TTM)–tray 4 front cover removal” on page 4-228. 3.Remove the tray 4 rear cable assembly. See “2000-sheet dual input (TTM)–tray 4 rear cables removal” on page 4-230. 4.Remove the tray 4 front cable assembly. See “2000-sheet dual input (TTM)–tray 4 front cables removal” on page 4-233. 5.Remove the media guide rack and pinion. See “2000-sheet dual input (TTM)–media guide rack and pinion removal” on page 4-223. 6.Move both media guides inward. 7.Lift the front edge of the bottom plate (A) from the tray. 8.Remove the bottom plate (A) from the tray. 9.Remove two screws securing the bracket (B) to the tray. 10.Remove the rear media guide (C). 11.Remove the mylar actuator (D) by sliding it out of the tray in the direction of the arrow. Note: Before re-installing, ensure the bosses on the rear media guide (C) are fitted into the slots on the mylar actuator (D) as shown in the figure. A B C D Slots
Repair information4-239 7500-XXX 2000-sheet dual input (TTM)–media feed unit assembly removal (tray 4) 1.Remove the tray 3 assembly. See “2000-sheet dual input (TTM)–tray 3 assembly removal” on page 4-217. 2.Remove the tray 4 assembly. See “2000-sheet dual input (TTM)–tray 4 assembly removal” on page 4-216. 3.Remove the tray 4 transport assembly. See “2000-sheet dual input (TTM)–tray 4 media transport assembly removal” on page 4-229. 4.Disconnect the two connectors from the media feed unit assembly (A). 5.Remove two screws securing the media feed unit assembly (A). Note: Removing the media tray 1 and media tray 2 in the printer makes removing the media feed unit assembly (A) rear screws easier. Connectors A A B Front
4-240MFP Service Manual 7500-XXX 6.Remove one screw securing the front bracket (B). 7.Remove the front bracket (B). 8.Move the media feed unit assembly (A) leftward and upward in the direction of the arrow to remove it. 9.Remove the two screws securing the lower guide (C) to the media feed unit assembly (A). 10.Remove the lower guide (C). 11.Remove two screws securing the upper guide (D) to the media feed unit assembly (A). 12.Remove the upper guide (D). 13.Remove two screws securing the rear bracket (E) to the media feed unit assembly (A). 14.Remove the rear bracket (E). CDE
Repair information4-241 7500-XXX 2000-sheet dual input (TTM)–sensor (tray 4 feed-out) removal 1.Remove the tray 3 assembly. See “2000-sheet dual input (TTM)–tray 3 assembly removal” on page 4-217. 2.Remove the tray 4 assembly. See “2000-sheet dual input (TTM)–tray 4 assembly removal” on page 4-216. 3.Disconnect the connector from the sensor (tray 4 feed-out) (A). 4.Release the hooks securing the sensor (tray 4 feed-out) (A) to the upper guide (B). 5.Remove the sensor (tray 4 feed-out) (A). HookAConnectorB Front
4-242MFP Service Manual 7500-XXX 2000-sheet dual input (TTM)–switch (TTM media size) removal Note: This removal procedure may be applied to tray 3 and tray 4. 1.Remove the tray 3 assembly See (“2000-sheet dual input (TTM)–tray 3 assembly removal” on page 4-217) or tray 4 assembly (“2000-sheet dual input (TTM)–tray 4 assembly removal” on page 4-216). 2.Disconnect the connector from the switch (TTM media size) (A). 3.Remove one screw securing the switch (TTM media size) (A). 4.Remove the switch (TTM media size) (A). Rear ConnectorA