3 ] Communications Related; 4 ] Paper/Document Feeding Related - Brother MFC6800 Service Manual

[ 3 ] Communications related
Trouble
(1) No tone is transmitted.
[ 4 ] Paper/document feeding related
Trouble
(1) Neither "COPY: PRESS COPY"
nor "FAX: NO. & START"
message appears although
documents are set.
(2) Document not fed.
(3) Document double feeding
(4) Recording paper not fed.
(5) Recording paper double feeding
Main PCB
NCU PCB
Sensors by using the maintenance-mode function code
32. (Refer to CHAPTER 5, Subsection 5.3.8.)
Document front sensor actuator and document rear
sensor actuator
Main PCB
ADF and its related sections
ADF motor and its harness
Document feed roller and its related gears
Main PCB
ADF parts
ASF
Drum unit
Heat-fixing unit
Drive gear ASSY
Main PCB
Separation pad on the ASF
6 -2 0
Check:
Check: