Adf Cover Sensor Detects Opened Cover State - Brother DCP-J4110DW Service Manual

Error Code A3

Document Jam
Document detection sensor detects that document is pulled out during document scanning. Or,
the document scanning position sensor cannot detect document within specified time.
User Check
- Remove the jammed document.
Step
1 Foreign materials in the document
feeding path
2 Document detection actuator
caught on the surrounding parts
3 Document scanning position
actuator out of place
4 Document scanning position
sensor harness connection failure
5 Document scanning position
sensor defective
6 ADF motor defective
7 Document pick-up roller worn out Replace the document separate roller ASSY.
8 Sensor relay PCB defective
9 Main PCB defective
Error Code A4

Cover is Open

ADF cover sensor detects opened cover state.

Although this error is usually unlikely to occur, it can be considered to occur due to noise
around the location of setting, power supply voltage fluctuation or problem of software.
User Check
- Turn the power off and on.
Step
1 Main PCB defective
Cause
Remove foreign materials.
Set the document detection actuator into place.
Set the document scanning position actuator into
place.
Reconnect the document scanning position sensor
harness.
Replace the document scanning position sensor PCB
ASSY.
Replace the ADF motor.
Replace sensor relay PCB.
Replace the main PCB ASSY.
Cause
Replace the main PCB ASSY.
2-51
LCD
Solution
LCD
Solution
Confidential