Lexmark C920 - Expansion Paper Feed Service Check; Face down Stacker Full Service Check

2-52 Service Manual
5056-XXX
* The turn guide door sensor can be bypassed by pressing down the metal actuator located on the sensor.
Hold it down with your finger or a piece of tape. Ensure all adhesive from the actuator is removed upon
completion of service.
Expansion paper feed service check
If you have a “200 Paper Jam Tray (x)” error code, check the option connection cable for proper connection to the
printer or other paper feeder.
Face down stacker full service check
3
Relay sensor
Paper feed clutch
• Bypass the turn guide door open sensor*.
• Turn the printer on while holding down the paper relay sensor.
- If the operator panel does not display “Paper Jam”, check
for a dirty paper relay sensor.
- If the paper relay sensor is clean, or the actuator for the
paper relay sensor is broken, replace the sensor.
If the sensors are replaced and problem remains, replace the
printer controller board.
• Check the resistance of the clutch using a multi meter. The
resistance should measure 160 ohms.
If the clutch shows a significantly higher reading, replace the
clutch.
• If you replace the clutch and the problem remains, replace the
printer controller board.
FRU Action
1 Feeder drive motor If the feeder drive motor works, go to the “Paper carrying service
check” on page 2-56.
2
• Gears
• Paper feed clutch
• Expansion feeder
control board
If the motor turns, but the drive gears do not, replace the gears as
necessary. Check the paper feed clutch for proper operation, and
replace as necessary. If this does not correct the problem, replace
the expansion feeder control board.
3
• Roller
• Roller clutch
If there is a failure to pick, or if a paper jam exists in the paper feed
unit, check for dirty or worn rollers.
If there is a failure to pick but the rollers are clean, check the roller
clutch. This can be done by turning the paper feed roll in both
directions.
If the shaft can be turned both directions, replace the roller clutch.
FRU Action
1 Stacker full detection lever Check the stacker full detection lever for damage.
2
• Stacker full detection
sensor
• Printer controller board
Check for a voltage fluctuation between 0 V and +5 V between pins
2 and 3 of connector CN10 on the printhead controller board while
actuating the sensor.
FRU Action