Ricoh Aficio MP171 Field Service Manual page 133

SC No. Level
SC551-00 A
SC No. Level
SC553-01
A
SC553-02
Error Name/Error Condition/Major Cause/Solution
Broken fusing (End) thermistor wire
At least ten times, the temperature is detected to stay at 0 deg C or less
for three seconds.
• Broken thermistor wire
• Bad connector contact
• Clear the SP: fusing SC.
• Check the connector connection.
• Replace the fusing (End) thermistor.
Error Name/Error Condition/Major Cause/Solution
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.
Service Call
131