Ricoh C211 Service Manual page 423

4-3. The Image Signal : SS830
LSYNC
(2048;
SH
TO
T q!
RS
0s
10ms (4096 count)
-
- .
Photo Signal Storage Time (lOms)
Jll
mm
111111111
)) 111111111
1~
1
illllll lllllllllll.~+
Illllllllllq /,11111111,,,1,,
I I
I
I
,1-----,
Dummy Pixel 32
'Effective Pixel 3648~ Empty Data 412
Dummy
Pixel 4
i
111111111111111111111111111 Ill
]11111111111111111111 /plllllllllllll,l
Dummy Pixels: The dummy pixels generated by the area covered with aluminum film.
The dummy pixels are used as the standard black level.
The first 32pixelsread(Dl to D32)are dummy pixels. Pixels D33to D3,68Oaretheeffec-
tive pixels (S1 to S3,648). After that there are four more dummy pixels. Therefore, the
total pixel count from the CCD, including the dummy pixels, is 3,684.
As the image signal captured by the CCD is clocked out by the shift gate every 10 ms
(scan line period), there remains time for 412 transmission clock pulses after all the
image data from the CCD has been output. These clock pulses, after all valid data have
been clocked out, constitute empty data. During this period, subscanning occurs.
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