Lexmark MS312 Service Manual page 48

Sensor (input) early/late arriving service check
Action
Step 1
Check the paper source.
Is the paper from the MPF?
Step 2
Check the MPF pick roller and separator pad for damage and
contamination.
Are they free of damage and contamination?
Step 3
Check the MPF solenoid for proper operation:
a
Remove the left cover.
b
Perform a print job from the MPF.
c
Check if the MPF solenoid moves when doing the feed test.
Does it move when doing the feed test?
Step 4
Make sure the MPF gearbox spring is properly installed and free of
damage. Check the MPF gearbox for wear or damage.
Are they free of wear or damage?
Step 5
Check the input sensor area for jammed media fragments.
Is the paper path free of partially fed or jammed media?
Step 6
Check the jam access cover if it is blocking the input sensor.
Is it blocking the input sensor?
Step 7
Check the input sensor cable for proper connection to the controller
board.
Is it properly connected?
Step 8
Check the input sensor.
Is it free of damage?
Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 6.
Replace the jam access
cover. See
cover removal" on
page
Go to step 8.
Go to step 9.
Diagnostic information
48
No
Go to step 5.
Replace the MPF pick
roller and separator
pad. See
roller removal" on
page 198
"Separator pad
removal" on page
206.
Replace the MPF
solenoid. See
solenoid removal" on
page 164.
Replace the MPF
gearbox. See
gearbox removal" on
page 167.
Clear the paper path of
any media fragments.
Go to step 7.
"Jam access
199.
Reseat the cable.
Replace the input
sensor. See
sensor and input
sensor removal" on
page 211.
4514
"MPF pick
and
"MPF
"MPF
"Duplex