Brother MFC-9420CN Service Manual page 268

I-17 Color Misregistration
Phenomenon
Color misregistration is caused between two colors as shown in
Main Causes
(1) The OPC belt off-track error.
(2) The OPC belt fails to maintain the regular and proper rotation due to the impact caused when
the toner cartridge contacts the OPC belt.
(3) The transfer belt off-track error.
(4) The transfer belt fails to maintain the regular and proper rotation due to the impact caused
when the transfer roller contacts the transfer belt.
Paper exit roller
ASSY PU
Cleaning roller PU
Transfer roller ASSY PU
Transfer unit PU
Countermeasures
(1) Confirm that the transfer roller ASSY PU is properly installed.
(2) Confirm that the c
(3) Replace the belt cartridge PU with a new belt cartridge PU.
(4) Replace the transfer unit PU with a new transfer unit PU.
OPC belt
Fig. 9-18
is properly installed.
leaning roller PU
9 - 4 1
manuals4you.com manuals4you.com
print sample [17] of Fig.9-1.
Belt cartridge PU
Toner cartridge PU
(K, Y, M, C)
Confidential