4-46 Phaser 8400/8500/8550/8560 Color Printer Service ManualGeneral TroubleshootingCheck Misc MenuThis test looks at the paper path sensors to identify if anything would preventa page from printing. The Control Panel will display messages indicating ifanything unexpected is found for: R0 = upper paper path; R1 = tray 1; R2 =tray 2; R3 = tray 3; and R4 = tray 4. The display is a string of 0’s and 1’s (onedigit for each sensor state) and is listed below from most significant bit to leastsignificant bit.1 = an item that needs to be corrected.0 = normalPaper Path StatusR# DefinitionTypicalValue(8400)TypicalValue (8500/8550/8560) Actions0 Upper Paper Path 6 -31 Not used, always 00 5 - Front door open0 4 - Top door open0 3 - Paper at deskew sensor0 2 - Paper at preheat exit sensor0 1 - Paper at strip sensor0 0 - Paper at exit sensor1 Tray 1 14 - 31 unused, always 01 13 - No media present1 0 - 12 width value2, 3, 4 Tray 2, 3 and 4 9 - 31 unused2, 3, 4 8 - No tray2, 3, 4 7 - No paper2, 3, 4 6 - plate not lifted2, 3, 4 5 - Paper at tray pick sensor2, 3, 4 4 - media length top2, 3, 4 3 - media length bottom2, 3, 4 2 - Media width top2, 3, 4 1 - media width middle2, 3, 4 0 - Media width bottom
