Print Quality; Paper Pulling-In, Registration, Feeding And Ejecting Mechanisms - Brother DCP6690CW Service Manual

3.2.2.4 Paper pulling-in, registration, feeding and ejecting mechanisms

These mechanisms are driven via a gear train by two motors--paper feed motor located on the
left side of the engine chassis and ASF motor on the right side. (See the illustration on the next
page.)
The following illustration is a cross-sectional view of the machine viewed from the right. Place
the recording paper face down in paper tray #1
bends upward, heads back toward the front, passes under the head/carriage unit for printing, and
finally comes out onto the top of the paper tray cover.
The machine supports three paper feed modes--"normal SF mode," "high-speed feed mode,"
and "LT mode." Depending upon the selected print quality and paper tray, any of those three
modes applies as listed below.
*1
Paper tray #1
Paper tray #2
Recording paper path
(Front)
1
Paper tray #1*
Paper tray #2
Recording paper path
1
in paper tray #1*
Recording paper path
in paper tray #2

Print quality

Fast, Normal
High-speed feed mode
---
Paper pull-in gear shaft
Paper ejection roller
LT paper pull-in
gear shaft
*1
(and #2). This paper first proceeds to the rear,
Other quality
Normal SF mode
LT mode
Head/carriage unit
ASF idle gears 17
Platen
LT paper pull-in
rollers
LT paper pull-in
roller holder
DX paper tray #1 for duplex print models
*1
3-41
PF roller gear R
Clutch gears (R and L)
ASF/maintenance drive gear
ASF changeover
gear
(Rear)
Outer back cover
Paper pull-in
rollers
Paper pull-in
roller holder
(3_02_01_BH9_E)
Confidential