Brother MFC-7450

1-14
Confidential
■ Error code 7D
Dirt on drum unit
■ Error code 7F
Fax paper setting mismatch (The setting paper becomes besides the A4/Letter/Legal/Folio.)
■ Error code 80
Fax paper size is incorrect
(The registration rear sensor detected the paper that is smaller than the letter size.)
Drum Error
Open the front cover, then clean the corona wire of drum unit
according to the label.
User Check
• Clean the corona wire of the drum unit.
• Replace the drum unit with a new one.
Step Cause Remedy
1
Dirt or dust on drum unit
electrodes
Clean the electrodes on the drum unit.
(Refer to Fig. 1-1.)
2 HVPS PCB failure Replace the HVPS PCB ASSY.
3 Main PCB failure Replace the main PCB ASSY.
Size mismatch
Fax received. Set correct paper size in menu.
User Check
• Set the A4/Letter/Legal/Folio using the paper size setting in menu.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.
Size mismatch
Reload correct paper, then press Start.
User Check
• Set the paper of A4 or LETTER-size on the paper tray.
Step Cause Remedy
1
Registration front actuator
catching in some position
Re-assemble the registration front actuator.
2 Main PCB failure Replace the main PCB ASSY.