Sharp MX-4100N Service Manual page 481

Signal name
DVM_CL Developing drive motor (Color)
DVM_K Developing drive motor (Black)
BS Developing bias (Y,M,C,K)
TCS Toner density sensor (Y,M,C,K)
No.
1 Developer roller
2 Mixing roller
3 Toner filter (Y,M,C,K)
2. Operational descriptions
This converts the electrostatic latent images on the OPC drum gen-
erated by the laser (writing) unit into visible images with toner.
Toner and carrier in the developing unit are stirred and transported
by the mixing roller.
By mixing and transporting, toner and carrier are negatively
charged due to mechanical friction.
The developing bias voltage (AC component and negative DC
component) is applied to the developing roller.
Negatively charged toner is attracted to the exposed section on the
OPC drum where the negative potential falls due to the developing
bias.
If the OPC drum is not exposed, the negative potential is higher
than the developing bias voltage, and toner is not attracted.
Name
Color developing unit/Color drum drive
Black developing unit/Black drum drive
Developer bias
Controls the toner density in the developing unit.
Name
Latent electrostatic images on the OPC drum are changed to visible images.
Mixing of developer
Prevents dispersing of toner
MX-5001N DEVELOPING SECTION K – 2
Function/Operation
Function/Operation
3. Disassembly and assembly
Be careful not to attach fingerprints or oily dirt on the DV roller sur-
face.
A. Development unit
a Density sensor
1) Open the front cover.
2) Remove the waste toner box.
a
Parts
1
2