Action Yes No
Step 3
Check the input sensor cable for proper connection to the controller
board.
Is it properly connected?
Go to step 4. Reseat the cable.
Step 4
Check the input sensor.
Is it free of damage?
Go to step 5. Replace the input
sensor. See “Duplex
sensor and input
sensor removal” on
page 193.
Step 5
Does the error remain?
Contact the next level
of support.
The problem is solved.
Sensor (input) early/late arriving service check
Action Yes No
Step 1
Check the paper source.
Is the paper from the MPF?
Go to step 2. Go to step 5.
Step 2
Check the MPF pick roller and separator pad for damage and
contamination.
Are they free of damage and contamination?
Go to step 3. Replace the MPF pick
roller and separator
pad. See “MPF pick
roller removal” on
page 180 and
“Separator pad
removal” on page
188.
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?
Go to step 4. Replace the MPF
solenoid. See “MPF
solenoid removal” on
page 147.
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?
Go to step 5. Replace the MPF
gearbox. See “MPF
gearbox removal” on
page 149.
Step 5
Check the input sensor area for jammed media fragments.
Is the paper path free of partially fed or jammed media?
Go to step 6. Clear the paper path of
any media fragments.
4514-220, -230
Diagnostic information
64
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