Action Yes No
Step 3
Check the MPF sensor for damage.
Is it free of damage?
Go to step 4. Replace the front input
guide. See “Front input
guide removal” on
page 186.
Step 4
Make sure the MPF pick roller and separator pad are free of debris. Check
both for wear or damage.
Are they free of damage?
Go to step 5. Replace the MPF pick
roller and separator
pad. See “MPF pick
roller removal” on
page 180 and
“Separator pad
removal” on page
188.
Step 5
a Remove the left cover.
b Run a print job from the MPF.
c Check the MPF solenoid for proper operation.
Does it function properly?
Go to step 6. Replace the MPF
solenoid. See “MPF
solenoid removal” on
page 147.
Step 6
a Make sure the MPF gearbox is free of debris.
b Check the gears and spring of the MPF gearbox for wear or damage.
Are they free of damage?
Go to step 7. Replace the MPF
gearbox. See “MPF
gearbox removal” on
page 149.
Step 7
Does the error remain?
Contact the next level
of support.
The problem is solved.
User attendance messages (0-99.99)
User attendance messages (0‑99.99)
User attendance messages
Error code Description Action
31.21 Capactive Toner Level Sensing (CTLS) reading out of
range.
Go to “CTLS service check” on page 95.
31.22 Excessive CTLS noise.
31.23 Abrupt change detected in CTLS reading.
31.25 CTLS calibration capacitor reading is too low
4514-220, -230
Diagnostic information
84
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