Ricoh AC104, Service Documentation, Page: 134 / 160

SYSTEM LAYOUT
B173 6-4 SM
6.2.5 SCANNER
The scanner reads an image with a photosensitive sensor.
Hardware:
•
CCD module, connection board, ADF board, AFE (Analog Front End), and
image processor (Located in CPU).
Mechanical:
•
ADF (Automatic Document Feeder)
6.2.6 LSU (LASER SCANNER UNIT)
The video controller controls the LSU unit. It scans the video data from the video
controller with laser beam. It uses the rotation principal of the polygon mirror to put
the latent image on the OPC drum.
One face of the polygon mirror is for one line scanning.