Lexmark C 950 Service Manual

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7.Remove the two screws (A).
8.Disconnect the cable (B).
9.Remove the registration/transport roller assembly.
RIP PCBA removal 
Before you replace the RIP PCBA, make sure you back up the eSF solutions and settings. See “eSF solutions 
backup” on page 4-149.
Warning:  If you are replacing the RIP PCBA in addition to the operator panel or the operator panel PCBA, you 
must replace one component at a time. After you replace one component, perform a POR on the  
						

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device before replacing a second component. If you replace the components simultaneously, the 
printer will be rendered inoperable.
1.Remove the two screws (A) securing the RIP PCBA to the machine. 
						

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2.Remove the RIP PCBA.
eSF solutions backup
If a technician needs to replace the RIP PCBA, the steps below should be taken to back up the eSF solutions 
and settings:
1.POR the printer into invalid engine code mode. 
2.Open a Web browser and navigate to the printer’s Web page.
3.Navigate to Settings, and click the link.
4.Navigate to Solutions and click the link.
5.Navigate to Embedded Solutions and click the link.
6.On the Embedded Solutions page, select the apps to be exported by clicking the selection box next to the 
app.
7.Choose Export.
If the Web page cannot be accessed, or an error persists despite trying to boot in Invalid Engine code mode, 
then there is no way to backup the eSF apps. The technician needs to make the customer aware that the 
applications and their setting could not be saved.
Note:  There is a size limit on the export file - 128kb. Because of this, it is recommended that you dont use 
the “global” backup found in Settings --> Import/Export --> Export Shortcuts File, Export Settings File, 
Export Embedded Solutions Settings File and Export Security Setups File. Customers with a large  
						

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number of applications or settings may exceed the file size limit and have information truncated in the 
exported file.
Sensor (image calibration) removal
1.Remove the printer front door. See “Printer front door removal” on page 4-10.
2.Remove the transfer belt cleaner. See “Transfer belt cleaner removal” on page 4-175.
3.Remove the waste toner box.
4.Remove the four photoconductor units.
5.Remove the four toner supplies.
6.Remove the operator panel front cover. 
7.Remove the printhead retract door. See “Printhead retract door removal” on page 4-142.
8.Remove the inner cover. See “Inner cover removal” on page 4-3.
9.Remove the inner plate. See “Inner plate removal” on page 4-95.
10.Remove the waste toner add chute. See “Waste toner auger chute removal” on page 4-191.
11.Remove the front left cooling fan. See “Front left cooling fan removal” on page 4-75.
12.Disconnect the cable (A) from the sensor (image calibration).
13.Remove the screw (B) from the sensor (image calibration).
B A 
						

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14.Gently slide the sensor (image calibration) out and remove it.
Sensor (media level) removal
1.Remove the appropriate feeder unit. See “Printer tray 1 feeder removal” on page 4-141, “Tray module 
media feeder removal” on page 4-212, “TTM tray 4 media feeder removal” on page 4-225, or “TTM 
tray 3 feeder removal” on page 4-221.
2.Release the tabs (A) securing the sensor (media level) to the assembly.  
						

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3.Remove the sensor (media level).
4.Disconnect the harness (B).
Sensor (media on belt) removal
1.Open the printer left duplex door assembly.
2.Remove the screw (A) securing the sensor (media on belt) to the machine. 
						

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3.Disconnect the cable (B).
4.Remove the sensor (media on belt).
Sensor (media out) removal
1.Remove the appropriate feeder unit. See “Printer tray 1 feeder removal” on page 4-141, “Tray module 
media feeder removal” on page 4-212, “TTM tray 4 media feeder removal” on page 4-225, or “TTM 
tray 3 feeder removal” on page 4-221.
2.Remove the media out actuator. See “Media out actuator removal” on page 4-120.
3.Release the tab (A) securing the sensor (media out) to the assembly. 
						

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4.Remove the sensor (media out).
5.Disconnect the cable (B). 
						

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Sensor (printer left duplex door interlock) 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 eight screws (B) securing the PCBA door to the machine. 
						

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4.Release the two clamps (C) to release the harness.
5.Swing the PCBA door open.
6.Remove the screw (D) securing the bracket to the machine.
7.Remove the bracket.