Chapter 55-9-if the setting of CCD-LUT is other than '0' and you have replaced the reader controller PCB.for CIS unit gain correction dataCOPIER>OPTION>BODY>CCD-LUTfor CCD gain correction5.3.3 Enlargement/Reduction5.3.3.1 Changing the Magnification in Main Scanning Direction 0006-5724iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /In Book Mode/ADF ModeThe image is read at 100% in main scanning direction, and the magnification is varied by processing the data on the main controller PCB.5.3.3.2 Varying the Magnification in Sub Scanning Direction 0006-5725iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /To vary the magnification in sub scanning direction, the machine operates as follows depending on the selected method of reading the original and the selected rateof magnification:1. In Book ModeTo suit the selected rate of magnification, the speed at which the original is read is varied and the data is processed by the reader controller PCB/main controller PCB.EX: for reduction to 25%, the original is read at 236 mm/sec and the data is varied for 50% reduction by the reader controller PCB (skipping data for 1/2) and for50% reduction by the main controller PCB (skipping data for 1/2).EX: at 100%, the original is read at a speed of 236 mm/sec.T-5-52. In ADF ModeTo suit the selected rate of magnification, the speed at which the original is read is varied and the data is processed by the reader controller PCB/main controller PCB.EX: for reduction to 25%, the original is read at 236 mm/sec, and the data is processed for 50% reduction (skipping for 1/2) by the reader controller PCB and for50% (skipping for 1/2) by the main controller PCB.EX: for enlargement to 400%, the original is read at a speed of 118 mm/sec, and the data is processed for 200% enlargement (doubling) by the main control PCB.T-5-65.3.4 Detecting the Size of Originals5.3.4.1 Outline 0006-5731iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /The machine identifies the size of the original with reference to the presence/absence of output levels of the reflecting type sensors; specifically,-the machine identifies the absence of paper if it finds a change in the output of the reflection type sensors when the copyboard cover is closed/opened.-the machine identifies the presence of paper if it does not find a change in the output of the reflection type sensors when the copyboard cover is closed/opened.The machine uses the following sensors; and the sensors are arranged as shown in the following figure:-for main scanning direction, reflection type photosensors (AB-configuration, 2 locations; Inch-configuration, 1 location).-for sub scanning direction, reflection type photosensors (AB-configuration, 2 locations; Inch-configuration, 2 locations)Operation Magnification25% to 49% 50% to 99% 100% to 400%Varying the speed of reading the original (mm/sec) 236 to 120 236 to 119 236 to 59Processing the data (digital; %) by the readercontroller PCB 50 50 100Processing the data (digital; %) by the maincontroller PCB 50 100 100Operation Magnification25% to 42% 43% to 84% 85% to 170% 171% to 400%Varying the speed at which the original is read(mm/sec) 236 to 168 274 to 140 277 to 139 276 to 118Processing the data (digital; %) by the readercontroller PCB 50 50 100 100Processing the data (digital; %) by the maincontroller PCB 50 100 100 200
