Pf Encoder Cannot Detect The Rotation Of The Paper Feed Roller; Pf Encoder Detects An Abnormal Stop Of The Paper Feed Roller - Brother MFC-J6510DW Service Manual

Error Code 8A
Paper Jam

PF encoder cannot detect the rotation of the paper feed roller.

Error Code 8B
Paper Jam

PF encoder detects an abnormal stop of the paper feed roller.

User Check
- Check whether recording paper is jammed.
Step
1 Foreign materials inside the
engine unit
2
Paper feed motor harness
connection failure
3 Connection failure of the PF
encoder/PF sensor harness unit
4
PF encoder disk defective
5
PF encoder PCB defective
6 Paper feed motor defective
7
Engine unit defective
8
Main PCB defective
Cause
Remove foreign materials.
Check the connection and reconnect the harness.
Check the connection and reconnect the harness.
Replace the PF encoder disk.
Replace the PF encoder/PF sensor harness unit.
Replace the paper feed motor.
Replace the engine unit.
Replace the main PCB ASSY.
2-50
LCD
LCD
Solution
Confidential