Panasonic FP-D250 User Manual page 35

a) During initialization.
b) After every 1,000 sheets following execution of Qualitative Reasoning Based
Adaptive Controller
c) At 200 copies after turning power on.
d) At 200 copies after replacing the toner bottle.
• Copy density detecting sensor
Two sensors for detection of copy density are used, one for halftone (line pattern)
and one for black density.
• The system provides a measured amount of light and detects the reflected light.
The resultant value is used for sensor compensation. This becomes the reference
value.
• As the reference value of gamma curve changes, various components are
automatically adjusted by the machine.
F mode F6-80: Automatic compensation value (read only) (laser power)
F6-82: Automatic compensation value (read only) (grid)
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