Stabilizing The Scanning Lamp; Detecting The State (Open/Closed) Of The Adf - Canon iR105 Service Manual

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CHAPTER 2 NEW FUNCTIONS

2.6 Stabilizing the Scanning Lamp

A transformer PCB has been added to increase the voltage supplied to the inverter power

supply from 38 to 40 V so that the intensity of the scanning lamp remains stable.

In addition to the open/closed detection sensor (ON at 30°) used in the GP605 (iR600),

the machine's ADF is also equipped with an open/closed detection sensor (ON at 5°), thus

enabling the detection of the state (open/closed) of the ADF.

If, for some reason, the state of the ADF sensor cannot be checked, detection will be

based solely on the state of the sensor in the machine (as in the case of the GP605 (iR600)).

ADF-side open/closed

detection sensor

• When the ADF Is Opened

When the ADF is opened, the ADF-side sensor goes ON as soon as it is opened 5° or

higher [1], causing the machine to assume that the ADF has been opened and that the origi-

nal has been removed; as a result, the size of the original that has been detected automati-

cally will be cleared. Thereafter, when the ADF is opened farther and to 30° or higher [2],

the machine-side sensor goes ON, enabling automatic detection of original size.

Machine-side

detection sensor

2000 2000 2000 2000

CANON iR105 REV.0 JULY 2001

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