Paper Jam - Brother HL-1020 Service Manual

4.

PAPER JAM

Problem
Jam at power on
Top of paper stopped
at 20mm from the
fixing unit.
Paper feed roller
rotated twice.
Top of paper stopped
at 250mm from the
fixing unit.
Next paper is not fed.
Top paper stopped
between the paper
feed roller and the
pick-up roller.
Paper was fed approx.
20mm from the pick-
up roller.
Top of paper stopped
at 17mm from the
contact point of the
heat roller and
pressure roller.
Jam occurred after
ejecting paper.
Top of paper stopped
at 20mm from the
fixing unit.
Note: How to check the sensors
(1) Open the cover.
(2) Power on the printer while pressing the panel switch.
(3) Release the panel switch.
(4) Press and release the panel switch.
Results:
*Alarm Lamp is ON = Paper feed sensor is turned ON
*Drum Lamp is ON = Paper eject sensor is turned ON
Type of jam
Paper stuck
No paper
Jam caused by paper
length detected as
longer than 400mm (16
inches).
Jam caused by paper
length detected as
shorter than 80mm.
Jam caused by a paper
feed delay.
Jam caused by the
paper sensed as not
being ejected from the
paper eject sensor.
Same as above.
1. Cover open
2. Bug
IV-21
Cause
Paper feed sensor or
paper eject sensor is
turned on.
Paper feed sensor is
not turned on.
Paper feed sensor is
not returning properly,
and is not turned off.
Paper feed sensor
was turned off early.
Malfunction of
actuator or hardware
noise.
Due to paper dust or
rubber of the pick-up
roller wear, paper was
not fed in at the
proper timing.
Paper eject sensor
does not work
properly and is not
turned off.
(single printing)
Same as above.
(continuous printing)
1. Cover is not closed
properly.
2. Bug
Temp measure
Remove the paper inside
the printer. If there is no
paper, check the
suspect sensors
referring to note and
clear the problem.
Check paper feed
sensor motion referring
to note and clear the
problem.
Check paper feed
sensor motion referring
to note and clear the
problem.
Check sensors referring
to note and clear the
cause of the problem.
Remove the paper dust
attached to the pick-up
roller. If the rubber is
worn out, replace it with
new one.
Check the sensor motion
referring to note and
clear the problem.
Same as above.
1. Check if the drum unit
is installed correctly.
2. Please inform BIL.