Operator Panel Service Check; Paper Feed Service Checks - Lexmark E250DN - Govt Laser 30PPM Special Build Mono Taa Service Manual

Operator panel service check

Inspect the operator panel cable for damage. Make sure the cable is plugged in securely. Run POST, and check
each light for proper operation. See
LED Operator panel service check
FRU
Operator panel (LED)
Controller card
Warning: Do not
replace the operator
panel and controller
card at the same time.
Each card contains the
printer settings. When
either of these cards is
new, it obtains the
settings from the other
card. Settings are lost
when both are new
and replaced at the
same time.

Paper feed service checks

Paper jam error indication during POST
FRU
Fuser (exit sensor)
Input/duplex sensor
Manual feed sensor
Media picks during POST and/or continuously
FRU
ACM
Manual feed clutch
"Power-On Self Test (POST) sequence" on page
Action
Lights
If none of the lights come on, open the controller card cage and locate the operator panel
connector at J3. Make sure the cable is properly connected to the controller card and the
controller card has input voltage to it.
With the printer on, verify the following without disconnecting the cable:
• Pins 1, 3, 5, and 6–3.3 v
• Pin 2–5 v
• Pins 4 and 7–GND
If these are correct and the operator panel is not functioning, replace the operator panel.
If any are incorrect, see "Controller card service check" on page
Buttons
If the buttons do not respond, replace the operator panel. There is no test or repair for the
faulty switches.
Action
If the exit sensor flag, which is visible at the back of the fuser, is in any position other than
vertical, the printer will display a paper jam. Make sure the flag is operating freely. Replace
the fuser if the sensor is damaged.
Make sure the input paper feed sensors are working properly. A stuck or incorrectly installed
sensor causes a paper jam.
Action
Check the ACM clutch for wear. The solenoid interacts with the clutch to control the motion
of the pick tires.
If the ratchet teeth of the ACM clutch assembly are worn or broken, the solenoid may not
stop the ACM from rotating. Replace the ACM clutch assembly if necessary.
Check the manual feed clutch for damage.
4512-220, -230
2-2.
3-39.
2-43
Diagnostic information