Troubleshooting Of Document Feeding; No Feeding; Double Feeding - Brother DCP-7030 Service Manual

4.

TROUBLESHOOTING OF DOCUMENT FEEDING

Problems related to document 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.
4.1

No Feeding

User Check
• Check if the document is inserted correctly to the depths of the ADF unit. (If the
document is inserted, the LCD indication is changed.)
Step
Document front
actuator not
1 operating
smoothly or
catching
Foreign object
2 around paper
feed roller
Paper feed roller
3 failure
ADF sensor PCB Is the problem solved by
4
ADF motor
5 failure
Drive frame
6 ASSY failure
Main PCB failure Is the problem solved
7
4.2

Double feeding

Step
Separation
1 rubber failure
Cause
Does document front
actuator move
smoothly?
Is there a foreign object
around the paper feed
roller?
Is the surface of the
paper feed roller worn
out?
replacing the ADF
sensor PCB?
Is the problem solved by
replacing the ADF
motor?
Is the problem solved by
replacing the drive
frame ASSY?
after replacing the main
PCB ASSY?
Cause
Is the surface of the
separation rubber worn
out?
Check Result
No
Yes
Yes
Yes
Yes
Yes
Yes
Check Result
Yes
1-27
Remedy
Re-assemble document
front actuator.
Remove the foreign object.
Replace the separate roller
shaft ASSY.
Replace the ADF sensor
PCB.
Replace the ADF motor.
Replace the drive frame
ASSY.
Replace the main PCB
ASSY.
Remedy
Replace the separation
rubber.
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