Manual Exposure Control - Minolta Di450 Service Manual

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Manual Exposure Control

• Manual Exposure Control selects an exposure level variable in nine steps according to
the setting made on the control panel by the user when the copier is in the Manual Expo-
sure mode.
• According to the manual exposure setting made on the control panel, the CPU of PWB-B
transmits a background removal threshold to the IR Density Correction block for density
correction. This background removal threshold has been predetermined according to the
manual exposure setting.
The control flow during manual density mode is described below.
The user selects the Manual Exposure mode on the Touch Panel and sets the
exposure level manually.
The exposure level data is transmitted from MSC via IRC to the Image Processing
Board.
The IRC on the Image Processing Board finds the background removal threshold
value that corresponds to the exposure level setting.
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