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 242 and
“Separator pad
removal” on
page 250.
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 210.
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 213.
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.
Step 6
Check the jam access cover if it is blocking the input sensor.
Is it blocking the input sensor?
Replace the jam
access cover. See
“Jam access cover
removal” on
page 243.
Go to step 7.
Step 7
Check the input sensor cable for proper connection to the
controller board.
Is it properly connected?
Go to step 8. Reseat the cable.
Step 8
Check the input sensor.
Is it free of damage?
Go to step 9. Replace the input
sensor. See
“Duplex
sensor and input
sensor removal” on
page 255.
4514-330
Diagnostics and troubleshooting
90
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