Code :

Code: C5B2, C5B3, C5B4
Description: Tray-2/3/4 CPU clock frequency error
C5B2=2nd Tray C5B3=3rd Tray C5B4=4th Tray
Remedy: Replace the Tray board GOH-11.

Code: C91A, C91B, C91C
Description: RFID reader I/F error
Interface error with the RFID reader is detected. 01: Communication error between the RFID reader and the engine circuit boards. 02: Error in the wireless circuit of the RFID reader 03: Communication error between the RFID reader and the toner cartridge. 04: Error is detected in the RFID toner cartridge. (In more than 4)
Remedy: 01: Same as the error no. C91D 02: Replace the RFID R/W board. 03: Check for normal connection of the antenna cable. 04: Check if quantity of the toner cartridge is correct or not.

Code: C91D
Description: RFID Reader not Installed
Remedy: RFID read device error Does this error recur?
Check for normal connection of the RFID R/W board. Replace the RFID R/W. Replace the PU board.

Code: C940
Description: Engine control logic has an error.
Remedy: Does this error recur? Yes Turn off the power of the printer and back on. Replace the PU board.

Code: C96A
Description: High voltage power supply interface error.
Remedy: Is the cable connecting the PU board to the high voltage unit connected normally? Have you checked defective contact of contactor points?
Re-connect them normally. Check for defective contact of the high voltage system. Replace the high voltage power supply.