Troubleshooting For Paper Feeding Problems; No Paper Feeding From Paper Tray - Brother DCP-7090 Service Manual

4.2 Troubleshooting for 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.

4.2.1 No paper feeding from paper tray

<User Check>
• Check that the paper is set in the paper tray correctly.
• Check that there is not too much paper set in the paper tray.
• Flip over the paper in the paper tray or rotate the paper 180°.
• Check that the thickness of the paper is 60 to 163 g/m
• Check that the MP tray is not set as the paper tray.
• Flip through the paper and reset it in the paper tray.
• Clean the paper pick up roller.
Step
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Cause
Dirt on the paper dust cleaning roller of
the paper tray
T1 roller holder ASSY attachment failure
Connection failure of the paper feed
motor flat cable
Connection failure of the T1 paper feed
sensor harness
(non paper empty sensor models only)
Connection failure of the T1 clutch harness
Connection failure of the T1 paper
empty/paper feed sensor harness
(paper empty sensor models only)
T1 paper empty actuator coming off
Abrasion of the paper pick up roller
T1 paper feed sensor failure
(non paper empty sensor models only)
T1 paper empty sensor failure
(paper empty sensor models only)
Paper feed motor flat cable failure
Paper feed motor failure
Damaged gears in the paper feed drive
system
Damaged fuser unit
Main PCB failure
Paper dust cleaning roller
Hooks
<Front side>
Paper dust cleaning roller cover
2
.
Refer to the figure below to clean the paper dust
cleaning roller and inside of the paper dust
cleaning roller cover.
Reattach the T1 roller holder ASSY correctly.
Reconnect the paper feed motor flat cable.
Reconnect the T1 paper feed sensor harness.
Reconnect the T1 clutch harness.
Reconnect the T1 paper empty/paper feed sensor
harness.
Reattach the T1 paper empty actuator.
Replace the PF kit 1.
Replace the T1 paper feed sensor PCB ASSY.
Replace the T1 paper empty/paper feed sensor
PCB ASSY.
Replace the paper feed motor flat cable.
Replace the paper feed motor.
Replace the frame L unit.
Replace the fuser unit.
Replace the main PCB ASSY.
Fig. 2-14
2-73
Remedy
Confidential