Read Sharp AR-M700 (serv.man19) Service Manual online
: Feb. 6 2004
1
AR-M550/M620/M700 DETAILS OF EACH SECTION 6 - 70
C. Operational descriptions
Electrostatic latent images formed on the OPC drum by the LED (writ-
ing) unit (LED image light) are converted into visible images by toner.
ing) unit (LED 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 friction.
The developing bias voltage (negative) is applied to the developing
roller.
roller.
Negatively charged toner is attracted and attached to the area on the
OPC drum where negative voltage is reduced by exposure.
OPC drum where negative voltage is reduced by exposure.
On the other hand, the negative voltage at an area where exposure is
not made is higher than the developing bias voltage, and toner is not
attached.
not made is higher than the developing bias voltage, and toner is not
attached.
1
Aluminum
layer
CGL
CTL
-500v
+150v
Cleaning
mode
mode
Developing
mode
mode
Drum
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