3 ] Communications Related; 4 ] Paper/Document Feeding Related - Brother FAX4100 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
l
NCU PCB
l
Sensors by using the maintenance-mode function code
l
32. (Refer to Chapter V, Subsection 3.9.)
Document front sensor actuator and document rear
l
sensor actuator
Main PCB
l
ADF and its related sections
l
Scanner motor and its harness
l
Document feed roller and its related gears
l
Main PCB
l
ADF parts
l
Nip-related parts
l
Paper loaded in the paper cassette(s)
l
Paper cassette(s)
l
Drum unit
l
Heat-fixing unit
l
Drive gear ASSY
l
Engine PCB
l
Main PCB
l
Separation pad on the paper cassette(s)
l
VI - 20
Check:
Check: