| http://www.w3.org/ns/prov#value | - The printer unit 140 comprises, as shown in FIG. 31, a an image forming section (not shown) comprising a light-sensing drum, an electrifier, and developing unit, and an output load section 141 including a motor for driving the components as described above, a clutch, and a solenoid, various types of sensors 142 for detecting a surface potential of the light-sensing drum or toner density, and an I/
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