Ricoh Aficio MP171 Field Service Manual page 129

SC No. Level
SC531-00 D
SC No. Level
SC541-00 A
Error Name/Error Condition/Major Cause/Solution
Development Cooling fan error
The fan motor lock (rotating state) signal is sampled at 100 ms intervals
and t the machine fails to receive the lock signal 50 times in succession.
• Failed fan motor
• Disconnected connector
• Harness disconnection
• Defective IOB
• Replace the fan motor.
• Check the connector.
• Replace the harness.
• Replace the IOB.
Error Name/Error Condition/Major Cause/Solution
Broken fusing (Center) thermistor wire
The condition whereby the temperature is -20 deg C or less for 5 seconds
has been detected 10 times or more.
• Broken thermistor wire
• Bad connector contact
• Clear the SP: fusing SC.
• Check the connector connection.
• Replace the fusing (Center) thermistor.
Service Call
127