BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an explanatory diagram of a developing device to which a developing device adjustment method according to the present invention is applied;
FIG. 2 is an explanatory diagram of a printer incorporated with the developing device to which the developing device adjustment method according to the present invention is applied;
FIG. 3 is an explanatory diagram of a toner concentration sensor for detecting a toner concentration on a transfer body;
FIG. 4 is an explanatory diagram of a toner image formed on the transfer body;
FIG. 5 is a graph showing a relationship between a conveyance bias voltage and a toner concentration value of a solid pattern toner image on the transfer body (a conveyance amount of toner to a developing roll);
FIG. 6 is a graph showing conveyance characteristics in an amount of toner conveyed to the developing roll, and;
FIG. 7 is a graph to explain a mechanism of adjusting a mixing ratio of a two-component developer to a target mixing ratio.