Lexmark CS748de - Page 189

Diagnostic aids 3-11
5026
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Motor diagnostics
PCU CY – 1 N/A Closed • No motion
• No error reported
Open • Ok
• Cartridge disconnected from motor
Fuser Closed Closed Ok
Open Possible under-temp 120.04 error
Open N/A Not recommended, fuser errors possible
Cam N/A Closed • Ok
• Front door locks & unlocks
Open • Ok
• Door disconnected from motor
• View gearbox
COD N/A Closed • Ok
• Engages and disengages cartridges
Open • No motion
• No error reported (open while test is running)
Motor Direction Action Notes
Tray 1 Forward Pick from Main Tray • Will pick continuously
• View with tray removed or empty
Reverse N/A Function not supported
Align Forward Push media toward belt • Nip is closed
• Fails with waste box missing
Reverse Align leading edge Function not supported
Duplex Forward Push media down toward
input
• Will run continuously
• View with front cover split
Reverse Pick from MPF (MPF test) • Will pick continuously
• View empty or pull tray
Belt stepper Forward only Gear turns counter clockwise View with front cover open (No forward
menu)
Reverse N/A Only used to clear cleaner nip
Cartridge K – 3 Forward only Gear turns counter clockwise View with front cover open (runs PCU KM
also)
Reverse N/A Only used to clear blade nip
Cart MCY – 2 Forward only Gear turns counter clockwise View with front cover open
Reverse N/A Not used
PCU CY – 1 Forward only Gear turns counter clockwise View with front cover open
Reverse N/A Only used to clear blade nip
Fuser Forward Push media toward output
bin
Backup roll turns
Top cover should be closed
Reverse Push media toward output
bin
Backup roll is disengaged
Motor
Setup requirements
Notes
Top cover
position
Front door
position