HL-5240/5250DN/5270DN/5280DW SERVICE MANUAL
Confidential
4-33
WARNING
If you analyze malfunctions with the power plug inserted into the power outlet, special
caution should be exercised even if the power switch is OFF because it is a single pole
switch.
(3) Main motor failure
Possible cause Step Check Result Remedy
Failure of
connector
1 Is the connection of connector
CN4 on the main PCB correct?
No Reconnect the connector.
Main motor 2 Is the problem solved by
replacing the main motor?
Yes Replace the main motor.
Main PCB 3 Is the problem solved by
replacing the main PCB?
Yes Replace the main PCB.
(4) No paper supplied
Possible cause Step Check Result Remedy
Separation pad /
pickup roller
failure
1 Is the surface of the separation
pad or the pickup roller dirty or
worn out?
Yes 1) Clean the surface of the
separation pad or pickup
roller.
2) Replace the separation
pad or pickup roller.
Failure of
connector
2 Is the contact of the solenoid
connector on the relay front
PCB good?
No Reconnect the connector.
HVPS circuit Set paper in the manual feed
slot and make a test print by
pressing the Go button.
Yes Replace the relay front PCB.
Paper pickup
clutch solenoid
3
Does the voltage between pins
1(SOLENOID) and 2 (24V) of
the CN1 TRAY1, CN3 MP
connector on the relay front
PCB change from approx. 24V
DC to 0V within the specified
time?
No Replace the paper pickup
clutch solenoid.
Main PCB 4 Is the problem solved by
replacing the main PCB?
Yes Replace the main PCB.
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