Paper Feeding Problems; No Feeding; Double Feeding - Brother DCP-7030 Service Manual

3.

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.
3.1

No Feeding

Step
Edge actuator
1 catching in some
position
Roller holder
2 ASSY catching in
some position
Registration front
sensor failure
3
Paper feeding kit
failure
4
Pressure plate
5
gear damage
T1 solenoid failure Does the T1 solenoid
6
T1 solenoid Circuit
of the high-voltage
7
power supply PCB
broken
Main PCB failure
8
Main motor failure
9
3.2

Double Feeding

Step
Paper feeding kit
1
is abrasion
Cause
Does the edge actuator
move smoothly?
Does the roller holder
ASSY move smoothly?
Is the problem solved
after replacing the
registration front sensor
PCB ASSY?
Is the surface of the
separation pad or the
pickup roller dirty or worn
out?
Is the pressure plate gear
damaged?
work correctly?
Is the problem solved
after replacing the high-
voltage power supply
PCB ASSY?
Is the problem solved
after replacing the main
PCB ASSY?
Is the problem solved
after replacing the drive
sub ASSY?
Cause
Is the surface of the
separation pad worn out?
Check Result
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Check Result
Yes
1-23
Remedy
Re-assemble the edge
actuator and ensure
smooth operation.
Re-assemble the roller
holder ASSY and ensure
smooth operation.
Replace the registration
front sensor PCB ASSY.
1) Clean the surface of
the separation pad or
pickup roller.
2) Replace the separation
pad or pickup roller.
Replace the paper tray.
Replace the T1 solenoid
Replace the high-voltage
power supply PCB ASSY.
Replace the main PCB
ASSY.
Replace the drive sub
ASSY.
Remedy
Replace the paper
feeding kit.
Confidential