Switching Operation Modes-Normal Sf, High-Speed Feed, And Purge Modes - Brother MFC5490CN Service Manual

Switching operation modes--Normal SF, high-speed feed, and purge modes
The table below shows the relationship between the position of the mode switching lever, the
rotational directions of the ASF motor and paper pull-in rollers, the cap lift cam, the rotational
directions of the paper feed motor and paper feed roller, and the maintenance unit components
driven.
Normal SF mode
[CW Stop]
(Mode switching lever: Left position)
ASF changeover gear
ASF idle gears (two pieces)
Paper pull-in gear shaft
Gear train in the paper
pull-in roller holder
Paper pull-in rollers
[Forward Stop]
[Stop CW]
[Stop Forward]
Mode
switching Operation mode
lever
Normal SF mode
Left position
High-speed feed mode
Right position Purge mode
High-speed feed mode
ASF motor
[CW]
ASF/maintenance drive gear
Idle gear 16
Clutch gear L
[Forward]
Paper feed motor
[CW]
PF roller gear L
Paper feed roller
[Forward]
Purge cam
Pump switching unit
Air removing rods
Head wiper
Purge mechanism/Air removing mechanism/
Head wiper mechanism
ASF motor
(Viewed from the Paper pull-in rollers
output gear side)
CW → Stop Forward → Stop
CW Forward
CW
---
Purge mode
[CW]
(Mode switching lever: Right position)
Cap lift cam gear
Cap lift cam
Cap lift arm
(It supports the head cap unit.
A part of the head cap holder acts
Head cap holder
as a carriage lock.)
Head capping mechanism/
Carriage lock mechanism
[CCW/CW]
[Backward/Forward]
PF roller gear R
Clutch gear R
Purge gear
Purge bevel gear
Planet gear
Tube pump
Cap Paper feed motor
lift (viewed from the
cam output gear side)
Stop → CW
---
---
--- Rotate
--- ---
3-43
Motor rotation direction
CW: Clockwise
CCW: Counterclockwise
Switching between the Paper feed
mode and Purge mode
Switching the transmission route of
the paper feed motor rotation
depending upon the motor rotation
direction
(SwitchingOperationMode_BHmini9_E)
Component
Paper feed
driven in
roller
maintenance unit
Stop →
Forward
CW Forward
--- --- Head cap holder
CCW Backward Purge cam
CW Forward Tube pump
---
---
Confidential