Ricoh LDD250, Service Manual

Page: 337 / 459

SCANNER AND OPTICS
SM 6-15 C262/C265
Detailed
Des
cription
s
The platen cover sensor or the DF position sensor in the optional ADF informs the
main CPU of the original size when the platen is about 15 cm above the exposure
glass. At this time, only the sensors located underneath the original receive the
reflected light and switch on. The other sensors remain off. The main CPU can
recognize the original size from the number of activated sensors.
Original Size Length Sensors Width Sensors
A4/A3 version LT/DLT version L1 L2 L3 L4 W1 W2
A3 11" x 17" O O O O O O
B4 10" x 14" O O O O O X
F4 81/2" x 14" (8" x 13") O O O X X X
A4—L 81/2" x 11" O O X X X X
B5—L - O X X X X X
A4—S 11" x 81/2" X X X X O O
B5—S - X X X X O X
NOTE: O: On (Paper Present), X: Off
The above table shows the sensor output for each original size. A message will
appear in the operation panel display for other combinations.
W2
W1
L1 L2
L3 L4
C262D805.WMF