Paperfeed Unit Service Check - Lexmark C925 Service Manual

5041-030

Paperfeed unit service check

Note: These tests can also be performed on the expansion paper-feed units.
FRU
1 Door open interlock switch
Paper tray level motor
Printer controller board
2
Paper out sensor
Paper feed unit
Paper level sensor
2-22
Service Manual
Action
• Turn the printer on.
• Open the door.
• Check the operator panel for "Close Door" message.
• Bypass the door open interlock switch*.
• Pull out and replace the cassette. Listen for the paper tray level
motor to activate. (The tray may or may not rise. The motor
makes a low pitched vibrating sound.)
- If the paper tray level motor operates and the "Close Door"
message fails to appear, replace the door open interlock
switch.
- If the "Close door" message appears and the paper tray
level motor fails to operate, check CN6 on the engine board
for proper connection. If the cable is properly connected at
both connections, replace the paper tray level motor.
- If the paper tray level motor fails to operate, and the "close
Door" message fails to appear, check CN6 on the engine
board for proper connection. If it is properly connected,
replace the engine board.
• Turn the printer on, and open the right cover and duplex.
Bypass the right cover door open interlock switch*.
• With the paper tray empty and the paper out sensor blocked,
pull out and replace the cassette.
- If the tray rises and stays in place, check for a dirty paper
out sensor, and inspect the paper empty sensor actuator on
the paper feed unit.
- If the paper empty sensor actuator is stuck or broken,
replace the actuator.
- If the actuator is good, replace the paper out sensor.
- If the tray (x) empty message is displayed, check the paper
out sensor to ensure it is in place.
• Turn the printer on, and open the turn guide door. Bypass the
turn guide door open sensor*.
• Block the paper out sensor.
• With the tray empty, pull out and insert the cassette.
- If the tray fails to rise, check for a dirty paper level sensor or
broken casette present actuator. With the turn guide door
open, remove and reinsert the paper tray.
- If the paper feed roll fails to go up when the paper tray is
reinserted, replace the paper feed unit.
- If the actuator is broken, replace the broken actuator.
- If the actuator is good and the sensor was clean, replace
the paper level sensor.
- If the tray too full message is displayed, clean or replace
the sensor.
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