Led Display When Service Call Occurs - Brother HL-5440D Service Manual

3.3.2 LED display when service call occurs

When a service call occurs, the six LEDs flash. Pressing the [Go] and [Cancel] buttons
simultaneously allows you to identify the location of the problem based on the combination of
the LED status: lit, flashing or unlit.
In the event that a service call occurs, instruct end users to turn the power switch OFF and
then ON again after several seconds. If the service call still occurs, follow the table below to
identity the location of the problem and take appropriate measures.
LED
Press [Go] and Press [Go] and
[Cancel] [Cancel]
simultaneously once simultaneously twice
Type of problem
An error occurred in the high-
voltage power supply PCB.
The supplied power is unstable.
Any of error codes 6A00 to 6F00,
7600, 7800, DD00, DE00, or E200
(fuser unit error) occurred when
the power switch was turned ON or
sleep mode was released.
Rechecking the error after the
power switch was turned OFF and
then ON again because an error
was detected by the center
thermistor of the fuser unit.
(This message is displayed for
approximately 15 minutes when
the machine is restarted after error
code 5800 has occurred.)
2-23
Error Refer
codes to:
3600 2-30
EF00 2-55
5800 2-35
5900 2-35
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