Causes: Toner density sensor output abnormality (Sample level 25 or less, or 231 or above) Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble
Remedy: Replace the toner density sensor. Harness and connector connection trouble. Replace the developing unit. Replace the PCU PWB.
Code: F2-41
Description: Toner density sensor trouble (CYAN)
Causes: Toner density sensor output abnormality (Sample level 25 or less, or 231 or above) Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble
Remedy: Replace the toner density sensor. Harness and connector connection trouble. Replace the developing unit. Replace the PCU PWB.
Code: F2-42
Description: Toner density sensor trouble (MAGENTA)
Causes: Toner density sensor output abnormality (Sample level 25 or less, or 231 or above) Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble
Remedy: Replace the toner density sensor. Harness and connector connection trouble. Replace the developing unit. Replace the PCU PWB.
Code: F2-43
Description: Toner density sensor trouble (YELLOW)
Causes: Toner density sensor output abnormality (Sample level 25 or less, or 231 or above). Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble.
Remedy: Replace the toner density sensor. Harness and connector connection trouble. Replace the developing unit. Replace the PCU PWB.
Code: F2-45
Description: K image density sensor trouble
Causes: K image density sensor sensitivity adjustment trouble. K image density sensor trouble. Harness and connector connection trouble. K image density sensor dirt. Calibration plate dirt. Calibration plate solenoid trouble. PCU PWB trouble.
Remedy: Replace the K image density sensor. Check connection of the connectors and the harness. Clean the K image density sensor. Replace the calibration plate. Replace the calibration plate solenoid. Replace the PCU PWB. Use SIM44-2 to adjust the process control sensor sensitivity.
Code: F2-49
Description: LSU thermister trouble
Causes: The LSU detection temperature is outside of -28..C - 78..C. LSU thermister trouble. Harness and connector connection trouble. PCU PWB trouble LSU control PWB trouble
Remedy: Replace the LSU thermister. Check connection of the connectors and the harness. Replace the PCU PWB. Replace the LSU control PWB. Replace the LSU.