Service manual

SC Tables
SM 6-11 D127/D128
Trouble –
shooting
No.
Definition
Symptom Possible Cause
-003 A
Time out error
(On the fusing roller inactive)
NOT reaching the reload
temperature in 25 seconds after
starting heater control.
 Disconnection of Heater After
activation of the anti-overheat
device
(On the fusing roller active)
NOT reaching the reload
temperature in 35 seconds after
starting heater control.
543 A
Fusing overheat error 1
The fusing temperature detected by
the thermistor is 230°C or higher for
one second.
 Defective the triac
(Semiconductor device)
 Defective the IOB control board
 Detective the BICU control
board
544 A
Fusing overheat error 2
The fusing temperature detected by
the monitor circuit is 250°C or
higher.
 Defective the triac
(Semiconductor device)
 Defective the IOB control board
 Defective the BICU control
board
 Uncontrollable fusing condition
545 A
Fusing lamp overheat error
The fusing lamp remains on for 12
seconds after starting the waiting
mode.
 Defective thermistor
 Disconnection of Heater
 After activation of the
anti-overheat device
547 Zero cross signal malfunction
-001 B Detecting fusing contact meltdown  Defective the fusing relay