Figure 77. Inputs to and outputs from the reader controller PCB (1 of 3) . . . . . . . . . . . . . 180 Figure 78. Inputs and outputs from the reader controller PCB (2 of 3) . . . . . . . . . . . . . . . . 181 Figure 79. Inputs and outputs from the reader controller PCB (3 of 3) . . . . . . . . . . . . . . . . 182 Figure 80. Basic sequence of operations at power-on . . . . . . 183 Figure 81. A4- and letter-size, 2 copies, 4-color, Direct, and cassette 1 sequence of operations (1 of 2) . . . . . . 185 Figure 82. A4- and letter-size, 2 copies, 4-color, Direct, and cassette 1 sequence of operations (2 of 2) . . . . . . 186 Figure 83. Cross-section of exposure system . . . . . . . . . . . .
188 Figure 84. Exposure system mechanics . . . . . . . . . . . . . . . . . 188 Figure 85. A4- and letter-size, 2 copies, 4-color, Direct, cassette 1 sequence of operations . . . . . . . . . . . . 189 Figure 86. Scanner movement . . . . . . . . . . . . . . . . . . . . . . . . 190 Figure 87. Scanner motor circuit . . . . . . . . . . . . . . . . . . . . . . . 191 Figure 88. Changing the reproduction ratio . . . . . . . . . . . . . . 192 Figure 89. Controlling the scanning lamp . . . . . . . . . . . . . . . . 193 Figure 90. Paper selection sensors . . . . . . . . . . . . . . . . . . . . 197 Figure 91. Sensor operation . . . . . . . . . . . . . . . . . . . . . . . . . . 198 Figure 92.
Image processing unit . . . . . . . . . . . . . . . . . . . . . 200 Figure 93. CCD lines and filters . . . . . . . . . . . . . . . . . . . . . . . 201 Figure 94. CCD circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202 Figure 95. Analog circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203 Figure 96. G image signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205 Figure 97. Digital image processing . . . . . . . . . . . . . . . . . . . 207 Figure 98. Scanning lamp and lens . . . . . . . . . . . . . . . . . . . . 208 Figure 99. Shading correction measurement . . . . . . . . . . . . . 209 Figure 100. CCD position matching . . . . . . . . . . . . .
. . . . . . . . 210 Figure 101. Text identification . . . . . . . . . . . . . . . . . . . . . . . . . 211 Figure 102. Sensor color correction measurement . . . . . . . . . 212 Figure 103. Background pixel measurement . . . . . . . . . . . . . . 213 Figure 104. Input level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215 Figure 105. Weak and strong sharpness . . . . . . . . . . . . . . . . . 215 Figure 106. Original density compared to CCD output . . . . . . 216 Figure 107. Density level conversion . . . . . . . . . . . . . . . . . . . . 216 Figure 108. BGR and YMC levels . . . . . . . . . . . . . . . . . . . . . . 217 Figure 109. BGR to YMC conversion . . . . . . . . . . . .
. . . . . . . . 218 Figure 110. Gray components . . . . . . . . . . . . . . . . . . . . . . . . . 219 Figure 111. Bk signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 Figure 112. UCR amount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 Figure 113. Chromatic absorption characteristics . . . . . . . . . . 221 Figure 114. Enlargement/correction . . . . . . . . . . . . . . . . . . . . 223 EN Figures 7