Brother HL-2030 Service Manual page 189

M-13 LED failure
Possible cause Step
Three LEDs light A1
up after turning
the power ON.
Panel PCB A2
failure
Disconnection of B1
the high-voltage
power supply
PCB harness
Regist front B2
sensor failure
Regist rear B3
sensor failure
Paper eject B4
sensor failure
Main cover B5
switch
malfunction
M-14 Service error indication when turning the power ON
Possible cause Step
Disconnection of 1
the main motor
harness
Disconnection of 2
the scanner
motor harness
Fixing unit 3
failure
M-15 The printer stops while idling.
Possible cause Step
Front cover 1
failure
New toner 2
detection switch
failure
Process unit 3
terminal failure
Laser unit failure 4
Check
Is the printer in the service
mode?
Does any LED light up when
pressing the Go button?
Is the harness connected
securely?
Does the regist front sensor
work correctly?
Does the regist rear sensor
work correctly?
Does the paper eject sensor
work correctly?
Is the main cover switch closed
securely?
Check
Is the harness of the main
motor connected?
Is the harness of the scanner
motor connected?
Does the printer resume after
opening the cover, turning the
power ON and leaving the
printer for ten minutes?
Check
Is the cover opened by
vibration during idling?
Does the new toner detection
switch work correctly?
Are the terminals of the
process unit dirty?
Does the laser unit work
correctly?
7-25
HL-2030/2040/2070N SERVICE MANUAL
Result Remedy
Yes
Check that the Go button has
been pressed or not.
No
Replace the panel PCB.
No
Reconnect the harness
securely.
No
Replace the regist front
sensor.
No
Replace the regist rear sensor.
No
Replace the paper eject
sensor.
Yes Check the switch.
Result Remedy
No
Reconnect the harness
securely.
No
Reconnect the harness
securely.
No
Replace the thermistor.
Result Remedy
Yes Replace the front cover.
No
Replace the new toner
detection switch.
Yes Clean the terminals.
No
Replace the laser unit.
Confidential