Figure 31. Stacker Jam Detection - HP Color LaserJet 9500 Service Manual

Paper path and jam detection
Face-up path
Face-down path
Path through
offset module
Offset exit sensor
Offset module
Figure 31. Stacker jam detection
The paper-path sensors detect jams at the following locations:
ENWW
Paper input—The device receives media from the printer.
Flipper—FLEntry1 senses the media and activates the flipper motors. For face-up printing,
the flipper delivers the media to the face-up bin. Otherwise, the flipper changes page
orientation from face-up to face-down and delivers the media to the paper-path module.
Paper path—The paper-path module delivers face-down print jobs to the offset module. This
module is bypassed if the destination is the face-up bin.
Offset module —The offset module delivers face-down print jobs directly to the stacker bin
(which the Exit senses). Jobs are offset in accord with the print configuration.
Flipper entry sensor 1 (FLEntry1) and flipper entry sensor (FLEntry)
Flipper exit sensor (FLExit)
Paper-path sensor (Exit)
OMExit (Exit)-Stacker only
Flipper entry sensor Flipper entry sensor 1
Interlock switch
Paper input from the printer
Flipper
Flipper exit sensor
Controller PCA
Power supply
Chapter 5 Theory of operation 67