Scanner Drive - Ricoh A219 Service Manual

3.2 SCANNER DRIVE

[H]
[F]
[D]
A stepper motor [A] is used to drive the scanners.
The first scanner [B], which consists of the exposure lamp and the first mirror,
is connected to the first scanner belt [C]. The second scanner [D], which
consists of the second and third mirrors, is connected to the second scanner
belt [E]. Both the scanners move along the guide rod [F].
There are no scanner drive wires, and only one side of the scanner is
supported (by a rod and guide rail). Therefore, the scanners should be
moved by moving the timing belt, and never by moving the scanners directly.
The pulley [G] drives both the first and second scanner belts. The 2nd
scanner moves at half the speed of the first scanner. This maintains the focal
distance between the original and the lens during scanning.
The scanner home position is detected by a home position sensor [H]. The
scanner return position is determined by counting the scanner motor drive
pulses.
SM
CÓPIA NÃO CONTROLADA
[B]
2-7
CÓPIA NÃO CONTROLADA
OPTICS
[C]
[A]
[E]
[G]
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