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4-46 Phaser 8400/8500/8550/8560 Color Printer Service Manual
General Troubleshooting
Check Misc Menu
This test looks at the paper path sensors to identify if anything would prevent
a page from printing. The Control Panel will display messages indicating if
anything 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 (one
digit for each sensor state) and is listed below from most significant bit to least
significant bit.
1 = an item that needs to be corrected.
0 = normal
Paper Path Status
R# Definition
Typical
Value
(8400)
Typical
Value (8500/
8550/8560)
Actions
0 Upper Paper Path 6 -31 Not used, always 0
0 5 - Front door open
0 4 - Top door open
0 3 - Paper at deskew sensor
0 2 - Paper at preheat exit sensor
0 1 - Paper at strip sensor
0 0 - Paper at exit sensor
1 Tray 1 14 - 31 unused, always 0
1 13 - No media present
1 0 - 12 width value
2, 3, 4 Tray 2, 3 and 4 9 - 31 unused
2, 3, 4 8 - No tray
2, 3, 4 7 - No paper
2, 3, 4 6 - plate not lifted
2, 3, 4 5 - Paper at tray pick sensor
2, 3, 4 4 - media length top
2, 3, 4 3 - media length bottom
2, 3, 4 2 - Media width top
2, 3, 4 1 - media width middle
2, 3, 4 0 - Media width bottom