SCANNER hp Color 9850mfp 1.2.5 APS control The APS control is performed in the printer control board (PRCB) with signals read by the APS sensor S (PS3), the APS sensor L (PS4), and the CCD sensor when the RADF is opened/closed. The signal is sent via the scanner drive board (SCDB) and the overall control board (OACB) (see the ADF service manual for more detailed information on the APS control by R ADF). A. APS operation The APS sensor S (PS3) and the APS sensor L (PS4) detect the original size in the sub-scan direction II UNIT EXPLANATION and the CCD sensor detects the original size in the main scan direction. B.
Relationship between each of the sensors and the original size 2-8 Original size CCD sensor (Length of detection: mm) PS3 (ON/OFF) PS4 (ON/OFF) Smallest 102 OFF OFF B5R 182 ON OFF B5 257 OFF OFF B4 257 ON ON A4R 210 ON OFF A4 297 OFF OFF A3 297 ON ON 8.5 x 11R 215.9 ON OFF 8.5 x 11 279.4 OFF OFF 8.5 x 14 215.9 ON ON 11 x 17 279.4 ON ON