Canon LBP-3260 Service Manual page 96

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 sen-
sor 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 right after the rotation of the registration
roller to lower the lifting plate.
The CPU turns ON SL2 to lower the lifting plate. If it is normal, the lifting plate position sen-
sor detects the lifting plate within about 0.5 seconds. The CPU notifies the video controller of a
lifting plate position failure if the lifting plate position sensor fails to detect the lifting plate 5
times in a row when the CPU repeats this operation 5 times.
• Pick-up timing from the manual feed (A4 : two pages continuously print)
Power switch ON
PRINT signal (/PRNT)
VERTICAL SYNC signal (/VSYNC)
Main motor (MT1)
Lifting plate solenoid (SL2)
Manual feed clutch (CL3)
Registration clutch (CL1)
Registration paper sensor (PS1)
2 - 56
STBY INTR
3.0
0.27
1.87
Figure 2-5-14
PRINT
About1.1
0.55
0.03 0.27
2.03
1.87
0.14 0.14
(Unit: Seconds)
LSTR STBY