Ricoh D037 Service Manual page 451

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
The temperature measured by the heating roller thermistor (end)
does not reach 0°C for 150 seconds and the temperature/humidity
sensor of the machine detects 5°C or more.
The heating roller thermistor detects -5°C for 9 seconds.
Loose connection of heating roller thermistor
Defective heating roller thermistor
Related SC code: SC 541
1. Check that the heating roller thermistor is firmly connected.
2. Replace the heating roller thermistor.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Heating roller warm-up error 2
After the main switch is turned on or the cover is closed, the
increment of the heating roller temperature per 10 seconds is 40°C
or less. If this condition is detected five times consecutively, SC
552 is defined.
The heating roller temperature does not reach 100°C for 9 seconds
after the heating lamp on.
The heating roller temperature does not reach the ready
temperature while 75 seconds after the heating lamp on.
552 A
The end 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 thermistor (end)
Heating roller fusing lamp broken
Related SC code: SC 542
1. Check if the heating roller thermistor is firmly connected.
2. Replace the heating roller fusing lamp.
SM Appendix 4-29
SC Tables
D037/D038/D040/D041