Toshiba e-STUDIO4500c Service Manual page 431

April, 2007
SC553 A Pressure roller thermistor error 3: Software - High temperature
The thermistor detected a
temperature over 220 C.
Do SP5810 to cancel the SC fusing code.
SC554 A Pressure roller thermistor error 4: Hardware - High temperature
The thermistor detected a
temperature over 230 C.
Do SP5810 to cancel the SC fusing code.
SC555 A Pressure roller thermistor error 5: Lamp remains ON
After hot roller reaches warmup
temperature, the pressure roller
fusing lamp remains for 6 sec.
while the hot roller is not
rotating.
Do SP5810 to cancel the SC fusing code.
SC556 A Heating roller thermistor 2 error 5: Lamp remains ON
After hot roller reaches warmup
temperature, the pressure roller
fusing lamp remains for 6 sec.
while the hot roller is not rotating.
SC561 A Hot roller thermistor error 1: Thermistor disconnected
The temperature measured by the hot roller
thermistor does not reach the prescribed
warm-up temperature within 100 sec.
SC562 A Hot roller thermistor error 2: Failure to reach warmup temperature
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.
Do SP5810 to cancel the SC fusing code.
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
Thermistor damaged, or out of position
Fusing lamp disconnected, broken
Thermistor damaged, or out of position
Fusing lamp disconnected, broken
4-53
Loose connection of the hot
roller thermistor
Defective hot roller
thermistor
Defective BICU
Hot roller fusing lamp broken
Defective hot roller
thermistor
Defective BICU