Lexmark C920 - Finisher Service Check

2-54 Service Manual
5056-XXX
Finisher service check
FRU Action
1 • Input path sensor
• Paper register sensor
• Upper tray exit sensor
• Guide stack assembly
• Paper full A sensor
• Paper detect sensor
• Staple home position
sensor
• No staple sensor
• Punch box detect
sensor
• Invert path sensor
• Lower tray exit sensor
• Elevator upper limit
sensor
• Tray near full sensor
• Elevator lower limit
sensor
• Jogging assembly
• Pap. upper level sensor
• Fin. set switch sensor
• Staple cart. set sensor
Note: For frequent jams, hole punch problems, or stapling
problems, first check the finisher to printer alignment. Go to
“Aligning the finisher and printer” on page 3-59.
Run the finisher sensor test in diagnostic mode to test the sensors
and switches.
2
• Timing belts
• Patting roller
• Path select solenoid
• Path select gate
• Guide stack assembly
• Jogging unit assembly
• Tractor drive assembly
• Stapler
Run the staple test in diagnostic mode to test feeding and stapling
function.
3
• Registration roller
• Paper exit rollers
• Registration sensor
• Registration clutch
• Punch clutch punch unit
• Timing belt
Run the hole punch test in diagnostic mode to test the hole punch
function.
4
• Elevator motor
• Tray wires
Observe the elevator motor operation while powering the printer
up.