Sc569-00 Ricoh Site

The thermistor is a small, glass-encapsulated resistor that changes resistance with temperature. Over time, toner dust and paper dust create an insulating layer on the thermistor. This layer delays temperature readings, confusing the zero-cross detection circuit.

The SC triggers when:

Two sub-cases:

Warning: SP 5-810 resets counters. If you only want to clear the SC code without resetting PM (Preventive Maintenance) counters, use SP 7-403 (SC Code Reset) instead. sc569-00 ricoh

Physical damage to the thermistor’s wire harness or a loose connector (usually CNxxx on the fuser or controller board) creates an intermittent signal. The thermistor is a small, glass-encapsulated resistor that

For business-critical machines, individual component repair is risky. Replace the entire fuser unit with a genuine Ricoh OEM unit. After replacement: Two sub-cases: Warning: SP 5-810 resets counters