Panasonic UF-9000 Service Manual page 175

6.3.6. Paper Ejection and Paper Switchback
A. Normal Printing Mode (Not Duplex Mode)
After fusing, paper is fed to the output tray by the switchback roller and switchback pinch roller. The paper
exit/ADU paper jam sensor detects paper. If paper does not arrive at the sensor within a predetermined
period of time, "Jam at A" is displayed, and if paper remains at the sensor beyond a predetermined period,
"Jam at B" is displayed on the computer screen. Paper is ejected face down and stored in the output tray.
B. Duplex Mode
After fusing, paper is fed to the output tray by the switchback roller and switchback pinch roller. The paper
exit/ADU paper jam sensor detects paper. If paper does not arrive at the sensor within a predetermined
period of time, "Jam at A" is displayed on the computer screen. At the specified time after the sensor
detects the bottom of paper, the switchback roller rotates in reverse direction, turning on the switchback
solenoid to move the ratchet lever to Duplex Position. As a result, the paper is fed to the development area
through the Auto Duplex Unit (ADU) (see section 1.4 Component Layout and Paper Path). If paper remains
at the sensor beyond a predetermined period, "Jam at E" is displayed. Paper is ejected face down and
stored in the output tray.
Ver. 1.0
175
UF-9000
DP-180/190
JAN 2004