US 11,988,985 B2
Image forming apparatus and method for determining a cause on an abnormality
Yasunari Miyazaki, Sunto Shizuoka (JP)
Assigned to TOSHIBA TEC KABUSHIKI KAISHA, Tokyo (JP)
Filed by TOSHIBA TEC KABUSHIKI KAISHA, Tokyo (JP)
Filed on Feb. 3, 2023, as Appl. No. 18/105,265.
Application 18/105,265 is a continuation of application No. 17/399,243, filed on Aug. 11, 2021, granted, now 11,599,051.
Prior Publication US 2023/0185224 A1, Jun. 15, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G03G 15/00 (2006.01); G03G 15/02 (2006.01)
CPC G03G 15/5037 (2013.01) [G03G 15/0266 (2013.01); G03G 15/55 (2013.01)] 17 Claims
OG exemplary drawing
 
9. A method for an image forming apparatus, comprising:
detecting an actual charging potential of a photoconductor by a charger after the photoconductor is charged by the charger; and
determining one of a plurality of causes related to a charging abnormality of the photoconductor based on a relationship between a standard charging potential of the photoconductor obtained by charging by the charger and a charging potential detected;
charging the photoconductor with a plurality of different charging amounts and allowing detection of the actual charging potential of the photoconductor after the photoconductor is charged with the plurality of different charging amounts; and
determining one of the plurality of causes related to the charging abnormality of the photoconductor based on a relationship between the standard charging potential of the photoconductor to be obtained by charging with a certain charging amount and the charging potential detected with respect to the photoconductor charged with the charging amount in relation to each of the plurality of charging amounts.