REGISTRATION/ADU/REVERSE/PAPER EXIT hp Color 9850mfp II UNIT EXPLANATION 2-52 Symbol Name Function or method PS24 2nd transfer HP sensor 2nd transfer roller home position detection Photo sensor PS27 Intermediate conveyance sen- sor 1 Detection of paper at the intermediate conveyance roller 2 exit Photo sensor PS28 Intermediate conveyance sen- sor 2 Detection of paper at the intermediate conveyance roller 3 exit Photo sensor PS55 Conveyance lever sensor ADU open/close detection Photo sensor