Sharp MX-M350, Service Manual, Page: 63 / 276

MX-M350/M450 N/U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 17
C. Operational descriptions
Electrostatic latent images formed on the OPC drum by the Laser
unit (LD image light) are converted into visible images by toner.
Toner in the developing unit is stirred by the mixing roller.
When toner is stirred, it is negatively charged by mechanical fric-
tion.
The developing bias voltage (negative) is applied to the developing
roller.
Negatively charged toner is attracted and attached to the area on
the OPC drum where negative voltage is reduced by exposure.
On the other hand, the negative voltage at an area where expo-
sure is not made is higher than the developing bias voltage, and
toner is not attached.
Aluminum
layer
CGL
CTL
Drum
-500V
(-470V)