Davin J012, Service Manual

Page: 291 / 365

No. Component Function
paper feed motor continues to rotate and drive the paper feed
rollers that transport the paper out of the bypass unit.
CL
PFU Paper Feed
Clutch – CL2
A one-way clutch that controls the operation of the pick-up roller.
Releases and allows the pick-up roller (a half roller) to rotate and
pick-up the sheet and feed it. When the roller reaches its point of
half-rotation, the pawl of the clutch stops the pick-up roller. The
paper feed motor continues to rotate and drive the paper feed
rollers that transport the paper out of the PFU paper tray.
CL
Paper Feed Clutch -
CL1 This is the magnetic clutch that controls the operation of the paper
feed roller.
Motors
MT
Bypass Paper Feed
Motor – STM4
Mounted in the multi bypass tray. Drives the pick-up roller and
paper feed rollers that feed paper from the bypass tray into the
printer.
MT Cooling Fan
Mounted on the right rear corner of the printer (viewed from the
back). This fan pulls hot air from the interior of the printer and pushes
it out through a ventilation port.
MT
Horizontal Motor -
DCM1
Mounted on the left side of the printer, drives forward and reverse
to control the timing belt that moves the carriage left and right during
printing. The operation of the motor is controlled by the horizontal
encoder sensor (a long film strip) mounted behind the carriage.
MT
Ink Pump Motor (KC)
– DCM3 Runs forward to pump cyan (C) to Print Head 2, reverses to pump
black (K) to Print Head 2.
MT
Ink Pump Motor (M)
– DCM4 Runs forward to pump yellow (Y) to Print Head 1, reverses to pump
magenta (M) to Print Head 1.
MT
Maintenance Motor
– MT STM1
Mounted in the maintenance unit. Drives the maintenance unit: 1)
Rotates forward to drive the shaft that raises and lowers the caps
during print head cleaning, 2) Reverses to drive the simple tube
pump that siphons ink from the print head through the right, 3) Raises
and lowers the wiper that removes ink collected around the print
head.
MT
PFU Paper Feed
Motor – STM2 Mounted in the PFU. Drives the pick-up roller and paper feed rollers
that feed paper from the PFU tray into the printer.
6. Detailed Section Descriptions
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