No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
542 A Heating roller warm-up error 1
• After the main switch is turned on or the cover is closed, the increment of the
heating roller temperature per 10 seconds is 30°C or less. If this condition is
detected five times consecutively, SC 542 is defined.
• The heating roller temperature does not reach 100°C for 15 seconds after
the heating lamp on.
• The heating roller temperature does not reach the ready temperature while
60 seconds after the heating lamp on.
• The center temperature of the heating roller does not reach the ready
temperature for 30 seconds after the edge temperature of the heating roller
has reached the ready temperature.
• Dirty or defective thermopile
• Defective thermopile.
• Trash on the surface of the thermopile lens.
• Defected thermistor.
• Input voltage is over guaranteed value
• Defective heating roller lamp
1. Check if the thermopile is firmly connected.
2. Clean the surface of the thermopile lens.
3. Test the conductance for the thermopile and the heating roller
4. Replace the thermopile.
5. Replace the heating roller lamp.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
543 A Heating roller fusing lamp overheat 1 (software error)
The detected fusing temperature stays at 245°C for 1 second.
• Defective PSU
• Defective BCU
1. Replace the PSU.
2. Replace the BCU.
SC Tables
587
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