Canon LBP-3260, Service Manual

Page: 69 / 234

Figure 2-3-3
Notes: 1. The shaded area indicates the area where the laser beam writes on the drum.
2. T1 and T2 vary according to the paper size. If no paper size is specified by the paper
size specification command from the video controller during manual feed, the print-
er does not recognize the paper width. So the T1 and T2 values are assumed to be
UNIVERSAL size (297.0mm x 635.0mm), the maximum paper width for this printer.
3. The CPU determines the actual size of the paper being fed by detecting the time from
the leading edge of the paper passes through the registration paper sensor (PS1) until
its trailing edge clears the sensor. The image is then masked according to the detect-
ed paper size.
2 - 29
CHAPTER 2
/BD
MSK
T
OPE
T2
T1
2m
m
2m
m
3 mm 3 mm
/VSYNC