Adf Service Check - Lexmark X422 Laser MFP Service Manual

ADF service check

FRU
ADF assembly
SCU card
Action
1. Open the ADF cover and check for
obstructions in the paper path.
2. Check the sensors to ensure the
flags move freely or dust is not
blocking the sensors.
If the ADF makes a copy and
generates a 290 error after the last
sheet is fed through the ADF, and
the error only goes away after a
POR, replace the ADF.
• If the problem persists, replace
the SCU.
If the ADF starts feeding, but prints a
blank page generating a 290 error,
the paper may or may not feed all
the way through the ADF.
• POR the machine into diagnostics
mode and perform a scanner
sensor test on the paper present
sensor and the ADF cover sensor.
• If the ADF cover sensor remains
in the CL setting when actuated
and the paper position sensor
remains in the OP setting when
actuated, replace the SCU card.
• If the ADF cover sensor changes
to the OP setting when actuated,
replace the ADF.
Paper in the ADF does not feed,
a blank page is run from the printer.
Paper in the ADF does not feed,
a 290 error is generated.
Check CN5, pins 1 and 2 for +24V.
• If +24V, replace the ADF motor
assembly.
• If not +24V, replace the SCU.
ADF pick roller, and ADF motor not
running during POST.
Check CN5, pins 1 and 2 for +24V.
• If +24V, replace the ADF motor
assembly.
• If not +24V, replace the SCU.
Diagnostic information
7001–001
2-19