Ricoh B230 Service Manual page 1121

Document length detection
From when the skew correction sensor switches on until it switches off, the CPU counts
the transport motor pulses. The number of pulses determines the length of the original.
Feed-in cycle
When the original size for the copy modes listed below cannot be determined, the image
cannot be correctly scaled (reduced or enlarged) or processed until the original's length
has been accurately detected. The length must be determined before the image is
scanned.
Auto Reduce/Enlarge
Centering
Erase Center/Border
Booklet
Image Repeat
The originals follow this path:
1. Length detection Scanning glass
2. Inverter table Scanning glass
3. Inverter table Scanning glass (image scanned)
Normal feed-in
In a copy mode other than those listed above, when the reduction/enlargement ratio has
been determined, the originals are scanned normally. In order to store the scanned
images, a large area of memory (the detected original width x 432 mm length) is prepared.
Next, only the portion of the image up to the detected original length is read from memory
and printed.
SM
Inverter table
Inverter table (restores the original order)
Exit tray
19
Basic Operation
B789