Ricoh Aficio FX10 Service Manual page 43

DETAILED SECTION DESCRIPTIONS
PRINTING
4. Print Density Adjustment
(1).Copy And Facsimle Mode
The FCIP2 controls print image density by changing the laser pulse width to
adjust the width of the dots across the page. The beam strength is not ad-
justed in this model.
The following table shows the relationship between the pulse width and the
image density.
Mode
Copy Normal
Mode
Halftone
Normal
115 %
Halftone
Normal
Enlarge
122 %
in
Halftone
Copying
Normal
141 %
Halftone
Normal
200 %
Halftone
Fax Normal
Mode
Halftone
To change the pulse width, the duty cycle of the laser pulse is changed. For
example, to make the print density 40% of normal, the laser is only kept on
for 40% of the normal duration for each pixel.
(2).Print Mode
The FCIP2 controls print image density by changing the toner application
roller bias and development roller bias.
Changing bias
Toner application roller bias: from -850V to -550V
Development roller bias
Normal
80 %
80 %
100 %
80 %
100 %
83 %
100 %
86 %
100 %
80 %
100 %
20 %
: from -500V to -300V
2-14
June 10th, 1997
Image Density
Lighten
40 %
40 %
40 %
40 %
50 %
50 %
43 %
43 %
40 %
40 %
40 %
20 %
Darken
160 %
160 %
160 %
160%
150 %
150 %
157 %
157 %
160 %
160 %
160 %
100 %