Ricoh Aficio FX10 Service Manual page 44

June 10th, 1997
5. Enlargement
For enlargement, the FCIP2 controls the magnification ratio by changing the
interval between pulses in the laser clock signals. So, for example, the clock
signal pulse interval for 200% enlargement is twice as long as the interval for
normal (100%) image reproduction. This makes each image pixel for 200%
enlargement become twice as long as each pixel for normal image reproduc-
tion.
During copying, a main scan resolution of 16 dots/mm is used, and smooth-
ing is not done on images of this resolution. In enlargement, since each pixel
is enlarged, video processing such as smoothing cannot be done.
6. Toner Saving Mode
In this machine, toner saving is done by reducing the number of dots actually
printed, not by varying the development bias. In toner saving mode, the im-
age data is filtered through the following four-line matrix.
1st line
2nd line
3rd line
4th line
(1: Actual data printed, black or white; 0: Always a white pixel)
Notes:
•
Toner saving mode only works when printing fax messages and reports.
(However, toner saving is disabled in NSF/NSS halftone mode, that is,
when bit 126 of the NSF/NSS frame is set to 1.)
•
When toner saving mode is selected, the print image density is automat-
ically set to "Normal"; in some cases, the image may become invisible if
the Lighter setting is used.
Cross Reference
Toner Saving Mode: User parameter 12, bit 2
Edge Enhancement
In toner saving mode, the machine prints a black pixel whenever the data
changes from white to black in the main scan direction. In this way, edges on
the image are printed more clearly.
DETAILED SECTION DESCRIPTIONS
1 0 1 0 1 0 1 0 1 0 . . . . .
0 0 0 0 0 0 0 0 0 0 . . . . .
0 1 0 1 0 1 0 1 0 1 . . . . .
0 0 0 0 0 0 0 0 0 0 . . . . .
2-15
PRINTING