Canon imageFORMULA DR-X10C Service Manual page 178

CHAPTER 5 TROUBLESHOOTING
6) Position Sensors
These sensors are a group of sensors that
detect the home position of important
parts.
Mark Sensor name/lighting state
Platen roller sensor (upper)
Detection of background color.
Lights when it is white.
Platen roller sensor (lower)
Detection of background color.
Lights when it is white.
CIS unit home sensor (upper)
Lights when the CIS unit is at the
document reading position.
CIS unit home sensor (lower)
Lights when the CIS unit is at the
document reading position.
Reverse roller sensor
Lights when the reverse roller is
at the highest position. (Refer to
Note.)
Pickup roller sensor
Lights when the pickup roller is
at the lowest position.
Tray home sensor
Lights when the pickup tray is at
the center (300)/upper (100) po-
sition.
Tray home sensor
Lights when the pickup tray is at
the lower (500) position.
Table 5-308
Note: Since the home position of the reverse
roller sensor is detected at the highest
position, but the mechanical upper
stable point is slightly different from the
highest point, the mark is off even if the
roller is at the upper position immedi-
ately after the power is turned ON.
When the reverse motor runs, the
mark flashes.
5-16
7) Staple Detect Sensors
These sensors are the staple sensors.
Mark
4 LEDs and 1 light-receiving element are
mounted on the staple PCB and the LEDs
light sequentially one at a time. Each op-
eration can be checked in this mode.
COPYRIGHT © CANON ELECTRONICS INC. 2008
Sensor name/lighting state
Staple sensor (left)
When the light-emitting part of the
left LED1 is blocked, the [Left 1]
mark lights. In the same way,
when the light-emitting part of
each LED is blocked, the corre-
sponding mark lights. When the
lighting-receiving part of the left
light-receiving element is blocked,
all the 4 marks light.
Staple sensor (right)
When the light-emitting part of the
right LED1 is blocked, the [Right
1] mark lights. In the same way,
when the light-emitting part of
each LED is blocked, the corre-
sponding mark lights. When the
light-receiving part of the right
light-receiving element is blocked,
all the 4 marks light.
Table 5-309
Light guide
LED4
LED3
LED2
LED1
Figure 5-314
CANON DR-X10C FIRST EDITION
Light-receiving
element