SERVICE CALL CONDITIONS
B132/B200 4-50 SM
Heating roller thermistor 1 error 5: Lamp remains on
SC545 A
After hot roller reaches warmup
temperature, the fusing lamps
remained on at full capacity for
25 sec. after reaching the
warmup temperature while the
hot roller was not rotating.
• Thermistor damaged, or out of position
• Fusing lamp disconnected, broken
Do SP5810 to cancel the SC fusing code.
Heating roller thermistor 2 error 1: Thermistor disconnected
SC546 A
The temperature measured by
the heating roller thermistor
does not reach 0°C after 45 sec.
and remains over this
temperature for 10 readings.
• Loose connection of the heating roller
thermistor
• Defective heating roller thermistor
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 either more than 66
or less than 45 for 10 readings.
Note: Zero cross signals, generated from an
ac power supply, are used to generate a
trigger pulses to control the applied power
accurately.
• Electrical noise on the power
supply line
• Fusing relay damaged:
replace the PSU.
Normally, this SC is cancelled if you do SP5810 to cancel the SC fusing code.
Heating roller thermistor 2 error 2: Failed to reach warmup temperature
SC548 A
After the main switch is turned on or
the cover is closed, the heating roller
temperature does not reach the ready
temperature within 2 sec. after the
heater switches on.
-or-
If the roller was below 45°C, the
heating roller did not reach the ready
temperature 2 sec. after reaching
45°C.
Note: Thermistor 2 stops monitoring
the temperature once Thermistor 1
detects warmup temperature.
• Thermistor is bent, installed
incorrectly
• Defective heating roller thermistor
• Heating roller fusing lamp broken
• Defective BCU
Do SP5810 to cancel the SC fusing code.
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