Canon iR5055, Service Manual

Page: 293 / 646

Chapter 9
9-13
ERROR CODE:
E840 (shutter error)
0001 Indicates that the HP sensor signal is not detected when the shutter is operating, after executing 3 retry operations.
0002 The interval of ON-OFF detection by the sensor in response to shutter operation is shorter than a specific time period.
9.3.1.6 Controlling the Shutter Position
0015-4611
iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
The shutter is set to the appropriate position by driving the shutter motor (stepping motor) for a specific number of steps. A cut-off is found in the periphery of the
shutter gear (front) operating in conjunction with the shutter; the machine checks to see if the shutter is set to the appropriate position with reference to the output
of the shutter HP sensor (PS53), i.e., whether the sensor has detected the cut-off.
F-9-19
[1] Shutter drive gear (front)
[2] Cut-off (for HP detection)
[3] Cut-off (for medium-size paper detection)
[4] Cut-off (for small-size paper detection)
PS53: shutter HP sensor
The following shows the position of the shutter (3 steps). The machine moves the shutter to the appropriate position to suit the size of the paper and the reading of
the thermistor in question.
([1] in the diagram indicates the shutter.)
- Home Position (HP)
F-9-20
- Medium-Size Paper Position
F-9-21
- Small-Size Paper Position
[1]
[2]
[3]
[4]
PS53
[1]
[1]