Brother HL-2400C Service Manual page 302

I-27 Color Missing
Phenomenon
Color is missing in the printed image as shown in
Main Causes
Fusing failure due to using damp paper or using the printer under high humidity
conditions.
Countermeasures
1) Use the paper immediately after open the paper bag.
2) Change the NVRAM setting. (Refer to 'THV TUNE UP' in Section 3.3 of Chapter V.)
I-28 Horizontal Line 244mm from the Edge of Paper
Phenomenon
A horizontal line appears 244mm from the edge of the printed paper as shown in
sample (28) of Fig.8-2.
Main Causes
Vibration is caused when an OPC belt and the transfer drum contact.
Countermeasures
Change the resolution to 600 dpi.
I-29 Vertical Lines on OHP
Phenomenon
Vertical lines appear when printing the OHP sheet as shown in
2.
Main Causes
Paper dust around the paper exit roller adhering to the OHP sheet.
Countermeasures
1) Use the recommended OHP sheet.
2) Clean the paper exit roller.
print sample (27) of
VIII-57
Fig.8-2.
print
print sample (29) of Fig.8-