Ccd Unit Drive (G027 Only) - Ricoh Bizworks 106 Service Manual

SCANNING 18 May, 1999

2.1.2 CCD UNIT DRIVE (G027 ONLY)

[A]
[C]
[B]
[E]
[D]
[F]
G027D502.WMF
A stepper motor [A] drives the CCD unit [B]. The motor uses the timing belt [C] and
the drive belt [D] to move the CCD along the guide rail [E].
The home position sensor [F] detects when the CCD unit is in the home position.
The motor speed depends on the selected reduction or enlargement ratio.
When the machine is turned on, it checks the home position sensor. If the home
position sensor is on, the CCD unit is in the home position. If the home position
sensor is off, the machine moves the CCD unit until the home position sensor turns
on.
[H]
[K] [J]
[G]
G027D503.WMF
Before scanning or copying, the CCD unit moves from the home position [G] to the
left until the home position sensor turns off. Then it moves in the opposite direction
until the home position sensor turns back on, completing home position
registration. After that, the CCD unit moves from the home position to a position
under the white shading strip [H] to adjust shading. At that time, the LED array is
turned on.
2-2