Sharp MX-2300 G

MX-2300/2700 N/G DEVELOPING SECTION K – 2
2. Operational descriptions
Electrostatic latent images generated on the OPC drum by the
laser (writing) units (laser image ray) are converted into visible
images by toner.
Toner and carrier in the developing unit are agitated and trans-
ported 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.
3. Disassembly and assembly
A. Developing section
(1) Developing unit
1) Open the front cabinet.
2) Remove the waste toner bottle unit.
Signal name Name Function/Operation
DVM_CL Developer motor (color) Color developing unit drive
DVM_K Developer motor (black) Black developing unit drive
BS Developer bias (Y, M, C, K) Developer bias
TCS Toner density sensor (Y, M, C, K) Controls the toner density in the developing unit.
DVTYP DV initial detection PWB (Y, M, C, K) Detection of a new developing unit (machine exclusive for CRU)
No. Name Function/Operation
1 Developer roller Latent electrostatic images on the OPC drum are changed to visible images.
2 Stirring roller Stirring developer
3 Toner filter Prevents dispersing of toner.
Unit Parts Maintenance
(1) Developing
unit
a Developer ▲
b DV seal ▲
c DV side seal F ▲
d DV side seal R ▲
e DV initial PWB
f Density sensor
g Toner filter ▲
(1)-a
(1)-c
(1)-g
(1)
(1)-b
(1)-e
(1)-f
(1)-d
1
2