Canon NP6330 Service Manual page 80

CHAPTER 3 EXPOSURE SYSTEM
3. Identifying the Size of Originals
Based on combinations of the states of the original size sensors, the DC controller
circuit identifies the size of each original as shown in Table 3-401 and Table 3-402.
• OFF The output of the sensor when the copyboard cover is brought down to 15°
through 30° and the output 15 sec thereafter are the same (detecting an
original).
• ON The output of the sensor when the copyboard cover is brought down to 15°
through 30° and the level when it is fully closed are different (detecting no
original).
Original size
ON: represents the presence of a original
OFF: represents the absence of a original
Original size
11" 17"
ON: represents the presence of a original
OFF: represents the absence of a original
3-16
PS21
A3 ON
B4 ON
A4R OFF
A4 ON
B5 ON
B5R OFF
NO OFF
Table 3-401
PS21
ON
LGL OFF
LTRR OFF
LTR ON
NO OFF
Table 3-402
COPYRIGHT © 1997 CANON INC.
Original size sensor
PS22 PS23
ON ON
OFF ON
OFF ON
ON OFF
OFF OFF
OFF ON
OFF OFF
Original size sensor
PS23
ON
ON
ON
OFF
OFF
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
PS24
ON
ON
ON
OFF
OFF
OFF
OFF
PS24
ON
ON
OFF
OFF
OFF