Canon LBP 2460 Service Manual - Page 97

CHAPTER 2 2. Manual feed (multi-purpose tray) The presence of paper on the multi-purpose tray is detected by the multi-purpose tray paper sensor (PS1301). When the DC controller receives the /PRNT signal from the video controller, the lifting plate solenoid (SL2) turns on, the lifting plate is unlocked (the lifting plate rises), and the paper touches the pick-up roller. The lifting plate position is detected by the lifting plate position sensor (PS1302). If the sensor detects that the lifting plate is up while waiting, SL2 is turned on to lower the lifting plate. The manual feed clutch (CL3) turns on, and the main motor (MT1) power is transmitted to the manual feeding pick-up roller. Paper pressed against the manual feeding pick-up roller by the lifting plate is picked up by the pick-up roller. Unnecessary sheets are removed by the separation pad, and one sheet is fed into the printer by feed roller 2. The subsequent operations are almost the same as for those of cassette feeding, except that SL2 is turned on again straight after the rotation of the registration roller to lower the lifting plate. When SL2 is turned on to lower the lifting plate, but PS1302 does not go "L" after about 1.5 seconds, or if SL2 is turned on to raise the lifting plate, but PS1302 does not go "H" after about 1.0 seconds, a lifting plate failure is reported to the video controller. Lifting plate Manual feed pick-up roller Lifting plate solenoid Print paper Lifting plate pressure cam Manual feed clutch Figure 2-5-9 2 - 51