Lexmark X 850 Owners Manual

Component locations5-11
7500-XXX
Multi connect
cable assembly 2
connects the following:
- Fuser sensor cable assembly
- Sensor (Tray 2 feed out)RIP card
cable assembly
Printhead
cable assembly 

5-12MFP Service Manual 7500-XXX
Exit Interface Cable
Assembly 

Component locations5-13
7500-XXX
TTM components 
2TM/TTM clutch assembly
2TM/TTM drive motor 2TM/TTM controller
card assembly
Sensor (tray 4 feed out)
Sensor (tray 3 feed out) Switch (2TM/TTM left
door interlock)Sensor (pre-feed) Sensor (media level)
Sensor (media out)
Switch (TTM media size) 

5-14MFP Service Manual 7500-XXX
Duplex components 
Sensor (duplex wait) Switch (duplex left door interlock)
Duplex drive motor
Duplex controller
card assembly 

Component locations5-15
7500-XXX
Exit 2 components 
Sensor (standard bin full exit 2)
Sensor (exit 2) Sensor (exit 2 media shift HP)
Media diverter solenoid Switch (exit 2 left door interlock)
Exit 2 drive motor
Media shift motor
Not used 

5-16MFP Service Manual 7500-XXX 

Preventive maintenance6-1
7500-XXX
6.  Preventive maintenance
This chapter describes procedures for printer preventive maintenance. Follow these recommendations to help 
prevent problems and maintain optimum performance.
Safety inspection guide
The purpose of this inspection guide is to aid you in identifying unsafe conditions.
If any unsafe conditions exist, find out how serious the hazard could be and if you can continue before you 
correct the hazard.
Check the following items:
•Damaged, missing, or...

6-2MFP Service Manual 7500-XXX
Lubrication specifications
Lubricate only when parts are replaced or as needed, not on a scheduled basis. Use of lubricants other than 
those specified can cause premature failure. Some unauthorized lubricants may chemically attack 
polycarbonate parts. Use IBM no. 10 oil, P/N 1280443 (Approved equivalents: Mobil DTE27, Shell Tellus 100, 
Fuchs Renolin MR30), IBM no. 23 grease (Approved equivalent Shell Darina 1), and grease, P/N 99A0394 to 
lubricate appropriate areas....

Preventive maintenance6-3
7500-XXX
After replacing the kit, the maintenance count must be reset to zero to clear the “80 scheduled maintenance” 
message. 
To reset the maintenance count
1.Turn off the printer
2.Press and hold the 2 and 6 buttons simultaneously.
3.Turn on the printer.
4.Release the buttons after 10 seconds. The Configuration Menu appears on the LCD.
5.Touch Reset Maintenance Counter from the Configuration Menu. 
6.Reset Maintenance Counter appears in the header and Ye s and No appears...

6-4MFP Service Manual 7500-XXX