Pf Encoder Sensor Cannot Detect Rotation Of The Paper Feed Motor; Excessive Current Protection Activated For The Driver Ic During Paper - Brother MFC-J3520 Service Manual

Error Code 8A

PAPER JAM

PF encoder sensor cannot detect rotation of the paper feed motor.

User Check
- Remove the jammed paper in jam clear cover part, platen part and front part.
Step
1 Foreign materials in the
feeding path
2 Paper feed motor harness
connection failure
3 PF encoder sensor harness
connection defective
4 PF roller belt out of place
5 PF encoder sensor defective
6 PF encoder disk defective
7 Paper feed motor defective
8 Main PCB defective
Error Code 8C

PAPER JAM
Excessive current protection activated for the driver IC during paper feed motor
operation.
User Check
- Remove the jammed paper in jam clear cover part, platen part and front part.
Step
1 Foreign materials in the
feeding path
2 PF encoder sensor defective
3 Paper feed motor defective
4 Main PCB defective
Cause
Remove foreign materials.
Reconnect the paper feed motor harness.
Reconnect the PF encoder sensor harness.
Set the PF roller belt into place.
Replace the PF encoder sensor PCB ASSY.
Replace the PF encoder disk.
Replace the paper feed motor.
Replace the main PCB ASSY.
Cause
Remove foreign materials.
Replace the PF encoder sensor PCB ASSY.
Replace the paper feed motor.
Replace the main PCB ASSY.
2-44
LCD
Solution
LCD
Solution
Confidential