Figure 3-311 shows changes in the intensity of the scanning lamp in relation to different densities of
originals under normal humidity conditions. If the density of an original is higher (darker) than that of the
Test Sheet and is lower (lighter) than that of a newspaper, the intensity of the scanning lamp is varied
between ‘medium’ and ‘maximum’ in terms of copy density notations. If the density of the original is lower
(lighter) than that of the Test Sheet, the scanning lamp is turned ON at the medium intensity; if it is dark-
er than a newspaper, the scanning lamp is turned ON at the maximum intensity for copying.
In low humidity conditions, on the other hand, the scanner is turned ON at the medium intensity if the
density of the original is higher (darker) than that of the Test Sheet; the intensity will be of a specific level
from light to dark (Figure 3-311a). At this time, the application voltage to the primary charging assembly is
lowered to lower the density.
The settings for this mode in which the intensity is maintained at a specific level in low-humidity condi-
tions and the voltage of the primary charging assembly is varied may be varied in service mode
(PRCC_SEL;
) to suit the user’s needs.
✽
5
✽
3. OPERATIONS AND TIMING
COPYRIGHT © 1996 CANON INC.
CANON NP6085 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-59
Test Sheet
Newspaper
Light
Maximum
Original
density
Scanning lamp intensity
Dark
Medium
Figure 3-311a
Test Sheet
Newspaper
Light
Maximum
Original
density
Scanning lamp intensity
Dark
Medium
Figure 3-311b
Mode
Enabled at all times
ON under low humidity conditions
Disabled
Setting
0
1
2
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Страница 502: ...PRINTED IN JAPAN IMPRIME AU JAPON 0697AB0 6 3 This publication is printed on 70 reprocessed paper ...