Service Call Tables
D014/D015/D078/D079 4-42 SM
Zero cross error
SC547 A
When the main switch is turned on, the machine checks how many
zero-cross signals are generated within 500 ms. This SC code is issued if
the number of zero-cross signals detected is not within specification.
Note: Zero cross signals, generated from an ac power supply, are used
to generate a trigger pulses to control the applied power accurately.
Do SP5810 to cancel the SC fusing code.
Electrical noise on the power supply line
Fusing relay damaged, replace the AC drive board.
Heating roller thermistor (center): software error
SC549 A
The thermistor detected a
temperature over 250°C 10
times within 1 sec.
Do SP5810 to cancel the SC fusing
code.
TRIAC short, AC drive board
defective
VBCU defective
Heating roller thermistor 3 (side): hardware error
SC550 A
The thermistor detected a
temperature over 260°C..
Do SP5810 to cancel the SC fusing
code.
TRIAC short, AC drive board
defective
VBCU defective
Pressure roller thermistor error 1
SC551 A
The temperature measured
by the pressure roller
thermistor did not reach 0°C
after 10 attempts.
Do SP5810 to cancel the SC fusing
code.
Loose connection of the pressure
roller thermistor
Thermistor positioned incorrectly
Defective pressure roller thermistor
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