Main Scan Resolution And Width (Book Scanner) - Ricoh MV310 Service Manual

May 22nd, 1995

2. Main Scan Resolution and Width (Book Scanner)

Fax Mode
B4 (256 mm/10.1" width) Original
The machine scans 256 mm (10.1") width at 16 dot/mm resolution, then
convert it into 8 dots/mm resolution before transmission.
A4 (210 mm/8.3")/ Letter (216 mm/8.5") Original
The machine scans either 216 mm (8.5") or 210 mm (8.3") width at 16
dot/mm resolution, depending on the settings of System Switch 0D bits 0 to
5, then converts the data into 8 dot/mm resolution before transmission. How-
ever, the original width of the A4/Letter size specified in the T.30 protocol is
216 mm. So, the following diagrams explain the actual scanned width in each
paper size.
Letter size:
The machine scans and
transmits the whole
width of the original.
A4 size:
The machine scans 213
mm from the front end
of the scanning area,
and adds 3 mm of white
data at the beginning of
each line to get a 216
mm width of data for
transmission.
Copy Mode
The machine scans 256 mm (B4 width) at 16 dot/mm resolution. Then, each
scanned line is stored in the page memory for printing.
DETAILED SECTION DESCRIPTIONS
2-7
SCANNER
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(216 mm)
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Scanned Data
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(213 mm)
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Added Data (3 mm)
H521D503.wmf