Ricoh B132 Service Manual page 451

SC549 A Heating roller thermistor 2 error 3: Software - High Temperature
The thermistor detected a
temperature over 250°C times
within 1 sec.
Do SP5810 to cancel the SC fusing code.
SC550 A Heating roller thermistor 2 error 4: Hardware - High Temperature
The thermistor detected a
temperature over 260°C..
Do SP5810 to cancel the SC fusing code.
Pressure roller thermistor error 1
SC551 A
The temperature measured by the pressure
roller thermistor does not reach 0°C for 200
sec.
Do SP5810 to cancel the SC fusing code.
SC552 A Pressure roller thermistor error 2
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
ready temperature.
SC553 A Pressure roller thermistor error 3: Software - High temperature
The thermistor detected a
temperature over 220°C times
within 1 sec.
Do SP5810 to cancel the SC fusing code.
SM
SERVICE CALL CONDITIONS
• TRIAC short
• IOB defective
• BICU defective
• Fusing temperature control is erratic
• TRIAC short
• IOB defective
• BICU defective
• Fusing temperature control is erratic
• Loose connection of the
pressure roller thermistor
• Defective pressure roller
thermistor
• Defective BCU
• Pressure roller thermistor
harness loose, disconnected,
defective
• Pressure roller thermistor
defective
• TRIAC short
• IOB defective
• BICU defective
• Fusing temperature control is erratic
4-51 B132/B200