Code :

Code: F2-70
Description: Improper toner cartridge detection
Causes: An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble
Remedy: Replace the toner cartridge. Replace the PCU PWB.

Code: F2-74
Description: Toner cartridge CRUM error
Causes: Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy: Replace the toner cartridge. Replace the PCU PWB. Connector and harness check.

Code: F2-78
Description: Registration image density sensor trouble
Causes: Image density sensor trouble. Connection trouble of the harness between the PCU PWB and the image density sensor. Dirt on the image density sensor
Remedy: Check the sensor and the harness. Replace the registration image sensor. Replace the PCU PWB.

Code: F2-91
Description: High density process control high voltage error
Causes: Image density sensor trouble. Harness connection trouble between the PCU PWB and image density sensor. Dirt on the image density sensor. Developing tank abnormality.
Remedy: Use SIM44-2 to execute the gain adjustment of the process control sensor. Check the drum surface. Replace the developing tank.

Code: F3-12
Description: Paper feed tray 1 lift operation trouble
Causes: LUD1 is not turned ON within the specified time. CLUD1 sensor trouble Paper feed tray 1 lift unit trouble. PCU PWB trouble. Harness and connector connection trouble.
Remedy: Check connection of the harness and the connector of LUD1. Replace the lift-up unit. Replace the PCU PWB.

Code: F3-22
Description: Paper feed tray 2 lift operation trouble
Causes: LUD2 does not turn ON within the specified time. CLUD2 sensor trouble. Paper feed tray 2 lift unit trouble. PCU PWB trouble. Harness and connector connection trouble.
Remedy: Check the harness and the connector of LUD2. Replace the lift-up unit. Replace the PCU PWB.

Code: F6-00
Description: MFP-FAX communication trouble
Communication establishment error/Framing/Parity/ Protocol error
Causes: FAX unit PWB connector connection error FAX unit PWB - MFPcnt PWB harness trouble FAX unit PWB mother board connector pin breakage FAX unit ROM trouble/ROM pin breakage
Remedy: Check the connector connection between the FAX unit PWB and the MFPcnt PWB. Check the connector harness between the FAX unit PWB and the MFPcnt PWB. Check the machine grounding. Check the FAX unit PWB ROM.

Code: F6-01
Description: FAX board EEPROM read/write error
EEPROM access error (read/write)
Causes: EEPROM trouble FAX PWB EEPROM access circuit trouble
Remedy: Check that no trouble occurs after replacement of EEPROM. Execute the memory check of SIM66-3 to insure that EEPROM can be accessed. Replace the PWB. In this case, not need to execute the simulation.