Brother MFC-J6920DW, Service Manual

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Confidential 2-43

Error Code 88
Recording paper jam
Switchback sensor cannot detect paper feeding state even papers are fed during
printing.
User Check
- Remove the jammed paper in platen part and front part.

Error Code 89
Paper width sensor cannot detect origin specified on the paper feed roller.
Fig. 2-7
Paper Jam LCD
Step Cause Solution
1 Foreign materials in the
feeding path
Remove foreign materials.
2 Switchback actuator out of
place
Set the switchback frame ASSY into place.
3 Switchback sensor harness
connection failure
Reconnect the switchback sensor harness.
4 Paper feed roller,
paper ejection roller stained
Clean the related rollers.
5 Paper feed roller,
paper ejection roller defective
Replace related rollers.
6 Main PCB defective Replace the main PCB ASSY.
Unable to Print 89 LCD
Step Cause Solution
1 PF encoder disk stained Clean the PF encoder disk and flushing guide
(refer to Chapter 3, Section 1 "PRECAUTIONS
BEFORE PROCEEDING." )
2 PF home position detection
lever stained
Clean the PF home position detection lever and
the flushing guide.
(refer to Chapter 3, Section 1 "PRECAUTIONS
BEFORE PROCEEDING." )
3 PF encoder disk defective Replace the PF encoder disk.
4 PF home position detection
lever out of place
Set the PF home position detection lever into
place.
5 Paper width sensor or carriage
PCB defective
Replace the carriage PCB ASSY.
6 Main PCB defective Replace the main PCB ASSY.
PF home position detection lever