Code :

Code: F2-29
Description: Auto toner density control level setting trouble (Y)
Causes: The toner density sample level is not in the specified range when the automatic toner density control level is set. (Y) Toner density sensor trouble. Developing unit trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy: When the power is turned OFF/ON, the automatic developer adjustment is executed again. Replace the developer cartridge. Replace the PCU PWB. Check connection of the connector and the harness.

Code: F2-39
Description: Process thermister trouble
Causes: Process thermister trouble. Process thermister harness connection trouble. PCU PWB trouble
Remedy: Replace the process thermister. Check connection of the harness and the connector. Replace the PCU PWB.

Code: F2-40
Description: Toner density sensor trouble (BLACK)
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.