Service Call
M0C3/M0C4/M0C5/M0C6/M0C7 6-8 SM
No. Type Error Name/Error Condition/Major Cause/Solution
SC545 A Fuser full heater error
The fuser full heater remained ON at full capacity for more than 9 seconds after
the fusing temperature attains reload temperature.
• Deformed thermistor
• Thermistor not in the correct position
• Defective fusing lamp
1. Reset the SC.
2. Replace the fusing unit.
3. Replace the drawer harness.
4. Replace the PSU.
No. Type Error Name/Error Condition/Major Cause/Solution
SC546 D Unstable fusing thermistor temperature
While the machine is warming-up or printing, the detected temperature stays at
100
or less than the target temperature for 5.2 seconds, and this consecutively
occurs 104 times.
Unstable connector contact of fusing thermistor
None
No. Type Error Name/Error Condition/Major Cause/Solution
SC547 D Zero cross error
• The zero cross signal is detected 3 times even though the fusing lamp relay is
off when turning on the main power.
• The number of zero cross signal interrupts do not reach a specified value
during frequency detection.
• The zero cross signal is not detected for 3 seconds even though the fusing
lamp relay is on.
• Defective fusing relay
• Defective fusing relay circuit
• Unstable frequency of the power supply line
1. Check the power supply source.
2. Replace the PSU
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