Title:
画像形成装置
Document Type and Number:
Japanese Patent JP6935288
Kind Code:
B2
Abstract:
Optical scanning devices each have a Hall device for outputting a rotation signal by detecting a rotation of a motor. An optical scanning device controller has ASICs for performing startup control of the optical scanning devices, a CPU for controlling the ASICs, and a power supply path for supplying power to the optical scanning devices. The ASICs each have a FG counter for counting a clock signal and having a counter value to be reset by a rotation signal output from the Hall device. In a case where the motor is not normally driven when the optical scanning devices are started up, the CPU notifies an abnormality of the power supply device or the power supply path, based on a counter value of the FG counter acquired from each of the ASICs.
Inventors:
Yasuo Kamei
Application Number:
JP2017189561A
Publication Date:
September 15, 2021
Filing Date:
September 29, 2017
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B26/12; B41J2/47; G02B26/10; G03G15/04; G03G21/00; H04N1/113
Domestic Patent References:
| JP2011033833A | ||||
| JP2003025628A | ||||
| JP2001255789A | ||||
| JP2008188790A | ||||
| JP2010237622A | ||||
| JP2009069474A |
Foreign References:
| US6055083 |
Attorney, Agent or Firm:
Toshikazu Kaji
Eiko Nakamura
Eiko Nakamura