Sc Tables: Sc5Xx -2 - Ricoh D009 Service Manual

4.7 SC TABLES: SC5XX -2

Fusing thermistor open (center)
The thermistor (center) detects 0°C or less for 5 sec.
541 A
Fusing thermistor disconnected
Fusing thermistor connector defective
Fusing temperature warm-up error(center)
This SC is generated if the following condition occurs:
The thermistor (center) does not detect an 8°C increment in the fusing
542 A
temperature for 7.5 sec. just after the fusing temperature reached 45 °C.
The temperature of the center thermistor does not reach the target
temperature for 28 seconds after the fusing lamps turned on.
Thermistor warped or broken
Fusing overheat error 1 (software detection)
A fusing temperature (at the center) of over 230 °C (446 °F) is detected for 1
second by the fusing thermistors at the center or at either end of the fusing
roller.
543 A
Power supply unit defective
I/O board (IOB) defective
BICU defective
TRIAC short on PSU (PSU defective)
Fusing overheat error 1 (hardware detection)
A fusing temperature (at the center) over 250 °C is detected by the fusing
544 A
temperature monitor circuit in the BICU board.
I/O board (IOB) defective
BICU defective
SM 4-19
SC Tables: SC5xx -2
D009/D011/D012/D013