Ricoh M160 - Page 262

Service Call
M160/M161 6-18 SM
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC551-00 A
Broken fusing (End) thermistor wire
At least ten times, the temperature is detected to stay at -20 deg
C or less for 5 seconds.
 Broken thermistor wire
 Bad connector contact
 Clear the SP: fusing SC.
 Check the connector connection.
 Replace the fusing (End) thermistor.
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC553-01
SC553-02
A
Fusing (End) thermistor high-temperature detected (software)
(553-01)
In a condition of 235 degrees C or higher temperature, the
temperature has increased more than 10 degrees C per 1
second, the heater has continuously reached 100% (maximum)
duty, and the center thermistor has detected the failure to reach
the target temperature by 11 degrees C.
(553-02)
The temperature is detected to stay at 245 deg C or higher for
one second.
 Shorted triac
 Failed Engine Board
 Clear the SP: fusing SC.
 Replace the PSU.
 Replace the Engine Board.