Sb Roller Drive Mechanism; Torque Transmission Route From The Paper Feed Motor To The Sb Roller; Engagement/Disengagement Of Torque Transmission By The Sb Clutch Lever - Brother DCP6690CW Service Manual

SB roller drive mechanism

The rotational torque of the paper feed motor is transmitted to the paper ejection roller shaft on
which the paper ejection roller SB gear is mounted. As shown below, the rotational torque is
further transmitted via the SB gears A to D to the SB roller drive gear.
The torque transmission to the SB roller can be disengaged by the SB clutch lever engaged with
the outer profile of the DX cam. When the DX cam shifts the SB clutch lever outwards to slide
the SB gear C outwards, the rotational torque transmitted to the SB gear D is smaller than the
load of the SB roller drive gear so that the SB roller drive gear does not rotate.
SB clutch lever
DX cam
Paper ejection roller
SB gear
Paper ejection
SB gear A
roller shaft
SB gear B
SB gear C
< Torque transmission route from the paper feed motor to the SB roller >
Paper feed motor
SB gear A SB gear B
< Engagement/disengagement of torque transmission by the SB clutch lever >
ASF motor
DX cam shaft gear
Cap lift cam gear
Link gear holder DX ASSY
DX cam shaft
Duplex unit
SB gear D
SB roller drive gear
Paper ejection roller shaft
SB gear C
Cap lift cam gear Link gear holder DX ASSY
DX cam shaft DX cam (outer profile)
ASF motor
Switchback paper detection
sensor actuator
SB roller
Paper ejection roller SB gear
SB gear D SB roller drive gear
SB clutch lever
3-48
DX cam shaft gear
Planet gear in the link
gear holder LT DX ASSY
DX gear 25/18
DX gear 18
(3_Duplex_3)
SB roller
Link gear holder LT DX ASSY
Confidential