Brother MFC-8952DW - Page 108

2-63
Confidential
 Error code DD00
Fuser unit error (except error codes 6A00 to 6F00, 7600, 7800, DE00, and E200)
 Error code DE00
When the center thermistor of the fuser unit is higher than the idle temperature, the side
thermistor detected a temperature lower than the specified temperature.
Print Unable DD
Turn the power off and then back on again.
<User Check>
• Turn OFF the power switch. After several seconds, turn ON the power again and check
that this error is reset.
Step Cause Remedy
1
Connection failure of the center
or side thermistor harness of
the fuser unit
Check the connection of the center or side
thermistor harness of the fuser unit, and
reconnect it if necessary.
2
Connection failure of the heater
harness of the fuser unit
Check the connection of the heater harness of
the fuser unit, and reconnect it if necessary.
3
Connection failure of the eject
sensor PCB harness
Check the connection of the eject sensor PCB
harness, and reconnect it if necessary.
4
Connection failure of the low-
voltage power supply PCB
harness
Check the connection of the low-voltage power
supply PCB harness, and reconnect it if
necessary.
5
Eject sensor PCB failure Refer to "1.3.10 Check sensor operation
(function code: 32)" in Chapter 5 to check the
sensor operation. If the sensor operation is
faulty, replace the eject sensor PCB ASSY.
6
Low-voltage power supply PCB
failure
Replace the low-voltage power supply PCB
ASSY.
7 Fuser unit failure Replace the fuser unit.
8 Main PCB failure Replace the main PCB ASSY.
Print Unable DE
Turn the power off and then back on again.
<User Check>
• Turn OFF the power switch. After several seconds, turn ON the power again and check
that this error is reset.
Step Cause Remedy
1
Connection failure of the side
thermistor harness of the fuser
unit
Check the connection of the side thermistor
harness of the fuser unit, and reconnect it if
necessary.
2
Connection failure of the eject
sensor PCB harness
Check the connection of the eject sensor PCB
harness, and reconnect it if necessary.
3
Eject sensor PCB failure Refer to "1.3.10 Check sensor operation
(function code: 32)" in Chapter 5 to check the
sensor operation. If the sensor operation is
faulty, replace the eject sensor PCB ASSY.
4 Fuser unit failure Replace the fuser unit.
5 Main PCB failure Replace the main PCB ASSY.