Code :

Code: F2-21
Description: Secondary transfer unit initial detection trouble
Causes: When the newly installed secondary transfer unit is driven for the specified time after installation, the new state is not canceled. PCU PWB trouble. Connection trouble of the connector and the harness. Secondary transfer UN initial detection mechanism trouble Initial detection electrode trouble Secondary transfer unit trouble.
Remedy: Check conduction of the initial detection electrode plate and the initial detection GND electrode plate. Replace the PCU PWB. Check connection of the connector and the harness. Replace the secondary transfer unit.

Code: F2-22
Description: Discharge lamp trouble (K)
Causes: Contact trouble between the discharge lamp PWB (K) and the PCU PWB. Discharge lamp PWB (K) trouble. PCU PWB trouble.
Remedy: Replace the discharge lamp PWB (K). Check the harness and the connector. Replace the PCU PWB.

Code: F2-23
Description: Discharge lamp trouble (C)
Causes: Contact trouble between the discharge lamp PWB (C) and the PCU PWB. Discharge lamp PWB (C) trouble. PCU PWB trouble.
Remedy: Replace the discharge lamp PWB (C). Check the harness and the connector. Replace the PCU PWB.

Code: F2-24
Description: Discharge lamp trouble (M)
Causes: Contact trouble between the discharge lamp PWB (M) and the PCU PWB. Discharge lamp PWB (M) trouble. PCU PWB trouble.
Remedy: Replace the discharge lamp PWB (M). Check the harness and the connector. Replace the PCU PWB.

Code: F2-25
Description: Discharge lamp trouble (Y)
Causes: Contact trouble between the discharge lamp PWB (Y) and the PCU PWB. Discharge lamp PWB (Y) trouble. PCU PWB trouble.
Remedy: Replace the discharge lamp PWB (Y). Check the harness and the connector. Replace the PCU PWB.

Code: F2-26
Description: Auto toner density control level setting trouble (K)
Causes: The toner density sample level is not in the specified range when the automatic toner density control level is set. (K) 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: F2-27
Description: Auto toner density control level setting trouble (C)
Causes: The toner density sample level is not in the specified range when the automatic toner density control level is set. (C) 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: F2-28
Description: Auto toner density control level setting trouble (M)
Causes: The toner density sample level is not in the specified range when the automatic toner density control level is set. (M) 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.