Pc Drum Small Amount Rotation Control - Konica Minolta magicolor 8650 Service Manual

9. Photo conductor section
9.3.3

PC drum small amount rotation control

• Humidity around the imaging unit can cause variations in sensitivity among different PC
drums, allowing black bands to occur on images. In addition, ozone stagnant in areas
near the PC drum charge corona reduces sensitivity of the PC drums, causing white
bands to occur in the image.
• To prevent these image problems, that the PC drum is turned at regular intervals to keep
the surface sensitivity uniform as temperature and humidity change.
A. PC drum small amount rotation timing
• This operation is performed during the standby condition after the completion of a print
cycle.
• Small amount rotation time changes according to accumulated time of the PC drum rota-
tion and interior temperature.
• The small amount rotation is carried out when the PC drum stop hour counter reaches
the specified value. PC drum stop hour counter value is determined by the humidity mea-
sured when the PC drums are stationary and by how long IU has been operated.
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Theory of Operation Ver. 2.0 Nov. 2007
PC drum