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

6-20
[ 3 ] Communications related
Trouble Check:
(1) No tone is transmitted.  Main PCB
 NCU PCB
[ 4 ] Paper/document feeding related
Trouble Check:
(1) Neither "COPY: PRESS COPY"
nor "FAX: NO. & START"
message appears although
documents are set.
 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
(2) Document not fed.  ADF and its related sections
 ADF motor and its harness
 Document feed roller and its related gears
 Main PCB
(3) Document double feeding  ADF parts
(4) Recording paper not fed.  ASF
 Drum unit
 Heat-fixing unit
 Drive gear ASSY
 Main PCB
(5) Recording paper double feeding  Separation pad on the ASF