Paper Feeding Problems; Pickup Function Of Paper Tray Does Not Work; No Feeding - Brother DCP-7057 Service Manual

3.5

Paper Feeding Problems

Problems related to paper feeding are end user recoverable if following the User Check
items. If the same problem occurs again, follow each procedure in the order of the number
described in the Step column in the tables below.

3.5.1 Pickup function of Paper tray does not work.

Step
1 Link arm catching on some position
Pick-up roller holder ASSY
2
catching on some position
Harness connection failure of main
3
motor
Plate-up gear (gear Z19M10 or lift
4
gear 46) failure
5 Main motor failure
Low voltage power supply PCB
6
ASSY failure
7 Main PCB failure

3.5.2 No feeding

Not detect paper at feeding input
User Check
• Check if the paper tray is loaded correctly.
• Check if the paper is loaded into the paper tray correctly.
• Check that the paper smaller than the specified size is not loaded.
• Adjust the paper guide corresponding to the position of paper guide.
• Check if too much paper is loaded in the tray.
• Clean the surface of the separation pad or pick-up/separate roller.
Step
Link arm and pick-up roller holder
1
ASSY not assembled correctly
Harness connection failure of T1
2
clutch ASSY
Harness connection failure of
paper edge sensor harness ASSY
3
(The models with paper edge
actuator only)
Harness connection failure of
4
regist front sensor PCB
5 Paper feeding roller failure
Plate-up gear (gear Z19M10 or lift
6
gear 46) failure
7 T1 clutch ASSY failure
8 Main PCB failure
Paper edge sensor failure
(The models with paper edge
9
actuator only)
Regist front sensor PCB failure
10
Cause
Cause
2-71
Remedy
Re-assemble the link arm.
Re-assemble the pick-up roller holder
ASSY.
Reconnect the harness of the main motor.
Replace the plate-up gear (gear Z19M10
or lift gear 46).
Replace the main motor.
Replace the low voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Remedy
Re-assemble the link arm and pick-up
roller holder ASSY.
Check the harness connections of the T1
clutch ASSY, and reconnect it.
Check the harness connections of the
paper edge sensor harness ASSY, and
reconnect it.
Check the harness connections of the
regist front sensor PCB, and reconnect it.
Replace the paper feeding kit.
Replace the plate-up gear (gear Z19M10
or lift gear 46).
Replace the T1 clutch ASSY.
Replace the main PCB ASSY.
Check the sensor performance following
the procedure in "Operational check of
sensors" (Chapter 5). If any problem
occurs, replace the PF frame ASSY.
Check the sensor performance following the
procedure in "Operational check of
sensors" (Chapter 5). If any problem
occurs, replace the regist front sensor PCB.
Confidential