Lexmark C 746 Service Manual

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Cooling fan removal
1.Remove the rear upper cover. See “Rear upper cover removal” on page 4-50.
2.Remove the rear frame cover. See “Rear frame cover removal” on page 4-47. 
3.Disconnect JFAN1 (A).
4.Remove the two screws (B).
5.Remove the cooling fan.
B 
						

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Cooling fan filter removal
1.Remove the rear upper cover. See “Rear upper cover removal” on page 4-50.
2.Turn the cover over.
3.Squeeze the right side of the filter, and remove it from the tabs (A). 
						

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Duplex reference edge guide assembly removal
1.Remove the paper tray.
2.Disconnect the transfer module cable (A). 
3.Press the two tabs (B) to release the front access door cover assembly.
4.Press the two tabs (C) on either side of the transfer module, and lift out the transfer module.
Note:  Leave the photoconductor units on the transport belt when removing. 
Warning:  To avoid damaging the photoconductor drum, hold the photoconductor units by their handle and 
place the photoconductor units on a clean surface. Never expose the photoconductor units to light for a 
prolonged period of time. See “Handing the photoconductor unit” on page 4-2 for additional 
information.
BC
A 
						

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5.Looking down at the keyed end of the restraint (D), twist the end clockwise, slide the restraint upward 
through the slit (E), and slip the end of the restraint through the keyed hole (F). Repeat for the other side.
6.Close the front access door assembly.
DF E 
						

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7.Remove the two screws on the duplex aligner (G), and then remove the screw (H) securing the duplex 
reference edge guide assembly.
8.Remove the duplex reference edge guide assembly.
GH 
						

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Electrophotographic (EP) drive assembly removal
See “EP drive assembly” on page 7-9 for the part number.
1.Remove the paper tray.
2.Remove the transport belt module and the developer units. See “Transfer module removal” on 
page 4-171.
3.Remove the cartridges.
4.Remove the low-voltage power supply (LVPS). See “Low-voltage power supply (LVPS) removal” on 
page 4-119.
5.Disconnect the cartridge 1/fuser motor cable (two connectors) (A), and remove the cables from the cable 
retainers (B). 
						

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6.Disconnect the camshaft/transport cable connector (C), and remove the cable from the cable clamps (D).
7.Unwind the camshaft/transport cable and the cartridge 1/fuser cables (E).
Note:  Be sure to rewind the camshaft/transport cable around the other cables with about four twists to 
keep them from interfering with or being damaged by the motors. 
						

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8.Disconnect the cartridge 2/cartridge 3 motor cable (two connectors) (F), and remove the cable from the 
cable clamps (G).
9.Disconnect the motor drive cable connector (H), and remove the cable from the cable clamps (J).
10.Remove the two screws (K) to remove the motor driver card assembly.
11.Remove the two screws (L) on the inside
K
J
JH 
						

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12.Remove the three screws (M) on the front.
LM 
						

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13.Remove the seven screws (N) securing the EP drive.
N
N (First)
N
N