Lexmark C 746 Service Manual

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Multipurpose feeder (MPF)/duplex motor assembly removal
See “MP feeder/duplex drive parts packet” on page 7-7 for the part number.
1.Remove the low-voltage power supply (LVPS). See “Low-voltage power supply (LVPS) removal” on 
page 4-119.
2.Remove the multipurpose feeder/duplex gear and housing. See “Multipurpose feeder (MPF)/duplex 
gear and housing removal” on page 4-123.
3.Remove the two multipurpose feeder/duplex motor mounting screws (A).
4.Remove the multipurpose/duplex motor from the printer.
5.Push in the prongs (B) of the housing to remove the cable tie (C).
6.Slide the motor out of the housing.
7.Disconnect the connector (D) from the motor.
A 
						

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Installation notes:
1.Connect the cable (A) at the motor.
2.Slide the cable tie (B) onto the motor.
3.Insert the motor into the frame. 
						

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4.Replace the screws (C).
5.Slide the housing onto the motor, making sure the four tabs of the housing slide under the cable tie.
6.Replace the multipurpose feeder/duplex gear and housing assembly. 
						

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Multipurpose feeder (MPF)/duplex motor cable removal
1.Remove the multipurpose feeder/duplex motor. See “Multipurpose feeder (MPF)/duplex motor 
assembly removal” on page 4-125.
2.Disconnect the connector from JDX1 (A) on the system board.
3.Remove the cable from the cable retainers (B). 
						

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Multipurpose feeder (MPF) paper present sensor
1.Remove the right cover. See “Right cover removal” on page 4-51.
2.Remove the standard 550-sheet input tray.
3.Remove the rear frame cover. See “Rear frame cover removal” on page 4-47.
4.Remove the Low-voltage power supply (LVPS). See “Low-voltage power supply (LVPS) removal” on 
page 4-119.
5.Remove the three screws (A) securing the tray rail that contains the paper present sensor.
6.Remove the JMPFPP1 connector (B) from the system board, then remove the cable.
Installation note:  Pay attention to the routing of the cable.
A
B 
						

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7.Remove the MPF paper sensor bracket from the machine.
8.Pry the sensor off the bracket, then disconnect the sensor (C) from the cable (D).
9.Remove the cable from the bracket.
Installation note:  Pay attention to the routing of the cable.
CD 
						

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MPF pick removal
1.Open the MPF door.
2.Press the latch on the MPF pick then pull to the left to remove.
1
1
2 
						

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Operator panel cable removal
1.Remove the top access cover assembly. See “Top access cover assembly removal” on page 4-54. 
2.Turn the top access cover assembly over.
3.Remove the eight screws (A), and remove the position guide cover.
4.Pull open the operator panel connector (B) and disconnect the operator panel cable from the operator 
panel card.
5.Remove the operator panel cable from the toroid (C) and the two cable retainers (D).
Installation note:  Make sure the contact pins on the cable are facing up when reconnecting the operator 
panel cable to the connector.
A
DCB 
						

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Operator panel ground cable removal
1.Remove the top access cover assembly. See “Top access cover assembly removal” on page 4-54.
2.Turn the top access cover assembly over.
3.Remove the eight screws (A) securing the position guide cover.
4.Disconnect the operator panel ground cable from the operator panel ground pin (B).
5.Remove the screw (C) securing the operator panel ground cable to the operator panel card.
6.Remove the operator panel ground cable from its retainers.
Installation note:  Pay attention to the routing of the ground cable.
A
BC 
						

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Operator panel USB connector cable removal
1.Remove the top access cover assembly. See “Top access cover assembly removal” on page 4-54.
2.Turn the top access cover assembly over.
3.Remove the eight screws (A) securing the position guide cover.
4.Disconnect the USB ground cable (B) and detach the USB cable connector (C) from the USB slot.
5.Remove the USB cable and ground cable from its retainers.
Installation note:  Make sure to observe the routing of the USB cable.
A
BC