Lexmark C 950 Service Manual
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Repair information 4-177 5058-030 Go Back Previous Next Transfer belt lever removal 1.Open the front door. 2.Rotate the transfer belt lever counterclockwise to the unlock position. 3.Remove the screw (A) from the transfer belt lever. A
4-178 Service Manual 5058-030 Go Back Previous Next 4.Remove the transfer belt lever. Transfer roll HVPS PCBA removal 1.Remove the rear upper cover. See “Rear upper cover removal” on page 4-16. 2.Disconnect the input option cable (A).
Repair information 4-179 5058-030 Go Back Previous Next 3.Remove the eight screws (B) securing the PCBA door to the machine. 4.Release the two clamps (C) to release the harness. 5.Swing the PCBA door open.
4-180 Service Manual 5058-030 Go Back Previous Next 6.Disconnect the cable (D). 7.Remove the four screws (E) securing the transfer roll HVPS PCBA to the machine.
Repair information 4-181 5058-030 Go Back Previous Next 8.Release the tabs on the two plastic standoffs (F) securing the transfer roll HVPS PCBA to the machine. 9.Remove the transfer roll HVPS PCBA from the machine. Upper exhaust cooling fan removal 1.Remove the rear upper cover. See “Rear upper cover removal” on page 4-16. 2.Disconnect the input option cable (A).
4-182 Service Manual 5058-030 Go Back Previous Next 3.Remove the eight screws (B) securing the PCBA door to the machine. 4.Release the two clamps (C) to release the harness. 5.Swing the PCBA door open.
Repair information 4-183 5058-030 Go Back Previous Next 6.Disconnect the cable (D). 7.Remove the upper exhaust cooling fan. Re-installation note: When replacing the upper exhaust cooling fan, make sure the fan is positioned so that the air flow is directed away from the machine.
4-184 Service Manual 5058-030 Go Back Previous Next Upper printer engine PCBA removal 1.Remove the rear upper cover. See “Rear upper cover removal” on page 4-16. 2.Disconnect the input option cable (A). 3.Remove the lower engine PCBA. See “Lower engine PCBA removal” on page 4-101. 4.Disconnect all the cables from the upper printer engine PCBA. 5.Remove the six screws (B). WARNING Ensure that the EPROM is removed from the defective PCBA and installed to the new PCBA or damage to the machine may occur. For more details, go to “Upper engine PCBA reinstallation” on page 4-185.
Repair information 4-185 5058-030 Go Back Previous Next 6.Detach the upper printer engine PCBA by moving it to the right. 7.Remove the upper printer engine PCBA. Upper engine PCBA reinstallation 1.Install the NVM EPROM from the defective PCBA to the replacement PCBA. 1.1Remove the NVM EPROM from the defective PCBA using a chip puller. Hold the chip on the touch positions shown, then gently pull the chip away from the board. Warning: The chip must be pulled away in the direction perpendicular to the PCBA. The pins may get deformed if the chip is not pulled straight and evenly. WARNING Failure to perform this procedure correctly may cause: • damage to the replacement PCBA • loss of memory settings
4-186 Service Manual 5058-030 Go Back Previous Next 1.2Mount the NVM EPROM to the replacement PCBA. Warning: Failure to correctly mount the NVM EPROM chip may cause damage to the system. The correct orientation of the chip when mounted to the board is shown below. Pin 1 of the NVM EPROM chip (marked with a circle) must be inserted to the correct slot (marked with a triangle) on the replacement PCBA. 2.Install the replacement PCBA to the machine. Warning: Ensure that the cables are properly reconnected, or damage will occur. 3.Turn on the machine. 4.An error will occur on the system. To clear the error, press the power button on the operator panel to put the machine in hibernate mode. Warning: Shutting down using the operator panel button is required to update the memory settings from the old NVM EPROM and save it to the current system. Failure to to shut down correctly may cause loss of memory settings. Upper redrive assembly removal 1.Open the printer left duplex door assembly. 2.Remove the left upper cover. See “Left upper cover removal” on page 4-6.