• Code: F050
• Description: Main/engine PWB engine checksum error
• Remedy: Main/Engine PWB Download the engine firmware again (TSI: see page 4-138,LCD: see page 4- 141)
  Main/Engine PWB Turn the power switch off and on If not repaired, replace the EEPROM on the main/engine PWB or main/engine PWB.

• Code: F051
• Description: No scan engine main program
• Remedy: Main/Engine PWB Turn the power switch off and on If not corrected, replace the main/ engine PWB.

• Code: F12X
• Description: Abnormality detecting in a Scan control section
• Remedy: (1) Check the harness between Scan/DP<=>Main/Engine PWBs, and the connection state of a connector, and perform an operation check. (2) U021 Controller backup initialization is carried out and an operation check is performed. (3) Exchange a Scan/DP board and perform an operation check. (4) Exchange a Main/Engine PWB and perform an operation check. (5) Get USBLOG and contact service headquarters.

• Code: F14X
• Description: Abnormality detecting in a FAX control part
• Remedy: (1) Check the harness between FAX<=>Main/Engine PWBs, and the connection state of a connector, and perform an operation check. (2) U021 Controller backup initialization is carried out and an operation check is performed. (3) Perform a deed operation check for DIMM Clear by U671. * Notes(Since it disappears when received data remain, cautions are required.) (4) Exchange a FAX board and perform an operation check. (5) Exchange a Main/Engine PWB and perform an operation check. (6) Get USBLOG and contact service headquarters.

• Code: F15X
• Description: Abnormality detecting in an authentication device control section
• Remedy: (1) Check the harness between authentication device <=>Main/ Engine PWBs, and the connection situation of a connector, and perform an operation check. (2) Carry out U021 Main backup initialization and perform an operation check. (3) Exchange a Main/Engine PWB and perform an operation check. (4) Get USBLOG and contact service headquarters.

• Code: F18X
• Description: Abnormality detecting in a Video control section
• Remedy: (1) Check the harness between Engine<=>Main/Engine PWBs, and the connection state of a connector, and perform an operation check. (2) U021 Controller backup initialization is carried out and an operation check is performed. (3) Exchange a Main/Engine PWB and perform an operation check. (4) Get USBLOG and contact service headquarters.

• Code: F1DX
• Description: Abnormality detecting of the image memory Management Department
• Remedy: (1) Carry out U021 Main backup initialization and perform an operation check. (2) Exchange a Main/Engine PWB and perform an operation check. (3) Get USBLOG and contact service headquarters.

• Code: F21X, F22X, F23X
• Description: Abnormality detecting in an image-processing part
• Remedy: (1) Check contact of a DDR memory and perform an operation check. (2) Carry out U021 Main backup initialization and perform an operation check. (3) Exchange a Main/Engine PWB and perform an operation check. (4) Get USBLOG and contact service headquarters.