Chapter 77-104: OFF7.4.7 Adjusting the Density in Various Modes0009-3546The machine corrects the development bias determined as a result of potential control for the following operating modes, and uses the result as the targetvalue for the individual modes:1. Density Adjustment for CopyingPurpose: to obtain the density suited to the user's needs.Method of correction: uses the developing bias and image processing (binary density processing) according to the F-value setting2. Density Adjustment for PrintingPurpose: to obtain the density suited to the user's needs.Method of correction: uses the developing bias and image processing (thickening) to suit the F-value setting.Adjusting the Density for CopyingThe machine increases the developing bias to decrease the copy density. If increased in excess, the bias can cause light images; if decreased in excess, onthe other hand, the background can developing fogging. In light of this, the machine executes density processing using changes in the developing bias andimage processing (binary density processing).T-7-5Adjusting the Density for PrintingThe machine increases the developing bias to increase the print density. If increased in excess, the background can develop fogging. At the lower limit ofthe developing bias, the machine uses the changes in the developing bias and image processing (thickening processing) to ensure appropriate density.T-7-6*1: Thickening processing may be enabled for all F values in user mode ('correct fine line').F value Developing DC bias standard value(V)Shift (V) Image processing Image density1 240 60 yes lighter2 220 40 no3 180 0 no4 140 -40 no5 120 -60 yes darkerF value Developing DC bias standardvalue (V)Shift (V) Thickening*1 Imagedensity1 218 48 no light2 205 35 no3 194 24 no4 182 12 no5 170 0 no6 153 -17 no7 137 -33 no8 120 -50 no9 120 -50 yes dark
