Chapter 55-11F-5-184. Copyboard cover is closed (with cover angle at 5 deg or more but less than 25 deg).Original sensor: on (original size identification 2)F-5-195. The copyboard cover is closed (5 deg or less).size identifiedoriginal sensor: offIn identifying the size of an original, the data from original size identification processing 1 and data from original size identification processing 2 are compared,and the difference between these 2 sets of data is checked.If any of the following is true, the output of the sensors may not show any change, preventing the machine from correctly identifying the size:-the original is an A3 black original-the original is a book (its thickness may not allow the copyboard cover to close fully, thus preventing the detection of a change in the sensor level).-the copyboard cover is not closed fully (when a time-out condition occurs, there will be no detection of a change in the sensor level).F-5-20The machine uses the following in reference to changes occurring in the sensor output as found in original size identification processing 1 and original size identi-fication processing 2:F-5-215.3.5 Dirt Sensor Control5.3.5.1 Outline 0006-5929iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /The machine changes the original read point depending on the presence/absence of dust on the stream reading glass or the platen roller of the ADF, or it may executeimage correction to prevent the dust from showing up in the output. These operations are carried out only when the ADF is in use and, in addition, is closed:-at the end of a job-between sheets (for each reading of a sheet)-at the start of a job (only when any of the following conditions is true)1st job after power-ondust detected at all points of detection at the end of the previous jobdust detection failed to end normally at the end of the previous job (e.g., ADF opened)25Original sensor 3Original sensor 4Original sensor 2Original sensor 1Original (A4R)Original sensor 3/4 Original sensor 1/25Original sensor 3Original sensor 4Original sensor 2Original sensor 1Original (A4R)Original sensor 3/4 Original sensor 1/2Original sensor 3Original sensor 4Original sensor 2Original sensor 1Original (A4R)Change absentChange presentAB-ConfigurationA3A4B4B5A4RB5RNo originalOriginalsizeOriginalsensor 1Originalsensor 2Originalsensor 3Originalsensor 4Inch-Configuration11"X17"LTRLGLLTR-RNo originalOriginalsizeOriginalsensor 1Originalsensor 3Originalsensor 5:No original:change absent
