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2.5 E4
Step
1
(Initial Check)
Are any parts dirty, broken, malformed, incorrectly
installed or different from those listed in the specifica-
tions?
• Principle Parts to be Checked:
(1) Fuser assembly, (2) Exit sensor
(3) Exit actuator, (4) MCU PWB
(5) Feeder assembly, (6) Top cover assembly
(7) LVPS assembly
2
Does the problem recur if the power is turned OFF
and then ON again?
3
Is there any paper or other foreign material in the exit
actuator?
4
(Check the operation of the exit roller assembly.)
Do the exit roller assembly in the fuser assembly and
the pinch roller operate normally?
• Remove the EP toner cartridge and, after diagnosis
code 90 has been executed, check that the parts
operate correctly.
5
(Check that paper enters the exit roller properly.)
Does the paper pass between the exit roller assembly
in the fuser assembly and the pinch roller correctly?
• Remove the top cover assembly, print a test pattern
and check that the paper is fed correctly.
6
(Check the size of the paper.) *1
Is the paper size consistent with the data set in non-
volatile code A?
7
(Check the exit actuator.)
Does the exit actuator move smoothly away from the
exit sensor when paper is present and cover the exit
sensor when paper is not present?
8
(Check the exit sensor.)
Does the exit sensor function normally?
• Check using diagnosis code 02.
*1: The direction in which the paper is fed into the printer is determined by the size of the paper as set by the printer.
However, when good quality paper is used, an E4 error may occur.
Check
– 121 –
TROUBLESHOOTING
Remedy
YES
Replace the part or
install the part
correctly.
See step 3.
Remove the paper or
foreign material.
See step 5.
See step 6.
See step 7.
See step 8.
Replace the MCU
PWB.
NO
See step 2.
See step 4.
See step 7.
Replace the fuser
assembly.
Replace the fuser
assembly.
Change the value of
non-volatile code A
to be consistent with
the paper size.
Replace the fuser
assembly or the exit
actuator.
See section 3.7
Faulty Exit Sensor.
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