Brother DCP-6690CW, Service Manual, Page: 123 / 506

4-11 Confidential
Error Code
(Hex)
Symptom Probable Cause Solution
10
11
12 DX cam malfunction or
DX cam switch ON/OFF
detection failure when
duplex printing is not in
progress. Initialization failure during
powering-ON sequence Restart the machine.
DX cam switch defective Correct the connection of the
DX cam switch harness to the
main PCB.
Replace the duplex unit.
DX flapper defective Replace the duplex unit.
Transmission failure of ASF
motor drive torque Replace the link gear holder
DX ASSY.
ASF motor defective Replace the ASF motor.
Main PCB defective Replace the main PCB.
13-16 Not used.
17 Recording paper size
error.
(The machine ejects the
recording paper at the
registration stage in
duplex PC print/copy.)
- Paper wider than 220.4
mm or narrower than
95.5 mm
- Paper longer than 327.0
mm or shorter than
143.5 mm
(The "Wrong Paper
Size" appears on the
LCD.)
Recording paper size out of
the specified range Set recording paper in correct
size.
Switchbacked paper has
dragged a new sheet of paper
loaded in the DX paper tray
#1 along the switchback
paper path. Reload paper.
Replace the base pads and tray
flap pads in the DX paper tray
#1.
Paper width sensor (media
sensor) defective Replace the carriage PCB
ASSY.
Registration sensor defective Replace the registration sensor
actuator.
Replace the inner chute ASSY.
18 Paper feeding failure
after completion of
switchbacking to the DX
paper tray #1.
(The registration sensor
does not come ON
within the specified
number of pulses from
the start of paper feeding
for bottom-face
printing.)
(The "Paper Jam"
appears on the LCD.) Paper jam that has occurred
during feeding of
switchbacked paper Pull out the DX paper tray #1,
open the DX cover, and
remove the jammed paper.
Open the outer back cover and
the inner back cover DX, and
remove the jammed paper.
Registration sensor defective Replace the registration sensor
actuator.
Replace the inner chute ASSY.
ASF motor defective Replace the ASF motor.
Paper pull-in rollers defec-
tive Replace the paper pull-in
rollers.