Cap Lift Cam And Its Gear; Head Cap Unit; Head Cap Holder; 2 ] Maintenance Unit Components - Brother MFC5490CN Service Manual

[ 2 ] Maintenance unit components

Purge gear
Cap lift cam
Cap lift
cam gear
(ASF changeover
gear)
Head wiper
Maintenance unit
Viewed from the top

- Cap lift cam and its gear

These parts transmit the rotational torque of the ASF motor transmitted via the clutch gear L
to the head cap holder. (See
mechanism and motor rotational

- Head cap unit

When the power is off or the machine is not printing, the head cap unit fits tightly over the
print head to prevent the head nozzles from drying up and to seal the head nozzles for purge
operations to suck up old ink.

- Head cap holder

This lifts up the head cap unit to fit it tightly over the print head to seal the head nozzles. (The
had cap holder is driven by the ASF motor.)
- Carriage lock
This is a part of the head cap holder. It locks the head/carriage unit in its home position so that
the head cap unit protects the head nozzles.
- Purge gear and purge bevel gear
These gears transmit the rotational torque of the paper feed motor via the clutch gear R to the
planetary arm. (See
motor rotational
- Planetary arm
This switches the rotational torque of the paper feed motor (transmitted via the purge gear and
purge bevel gear) to the pump switching unit or tube pump depending on the direction of
paper feed motor rotation.
- Purge cam
This rotating cam drives the pump switching unit, the air vent rods, and the head wiper. Each
drive position of the purge cam is detected by the purge cam switch. (See
Air vent cap
Air vent rods
Carriage lock
(Part of head
cap holder)
Head cap holder
Head cap unit
[ 4 ] "Power transmission route to the head maintenance
direction.")
[ 4 ] "Power transmission route to the head maintenance mechanism and
direction.")
Pump switching unit
Purge cam
Purge bevel gear
(ASF changeover gear)
Cap lift cam gear
(3_10)
Viewed from the bottom
3-25
Planetary arm
Tube pump
Purge gear
(3_11)
Section 3.2.3.)
Confidential