Sharp MX-M550U Service Manual page 353

2. Operational descriptions
A. Outline
In this section, toner is attached to electrostatic latent images
formed by laser beams on the OPC drum, making visible images.
B. Description
Electrostatic latent images formed on the OPC drum by the LED
(writing) unit (LED image light) are converted into visible images by
toner.
Cleaning
mode
+150v
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 exposure
is not made is higher than the developing bias voltage, and toner is
not attached.
layer
Aluminum
Drum
Developing
mode
-500v
MX-M700N DEVELOPING SECTION L – 2
3. Disassembly and assembly
A. Developer tank section
No.
(1) Developing unit
(1)-d
CGL
(1)-c
CTL
(1) Developing unit
1) Take out the developing tank.
Unit No.
a Developer
b DV seal
c MG holder F and R
d Side seal F and R
e Toner density sensor
(1)-b
(1)-a
(1)
(1)-e
1
2
Mainte
Parts
nance
▲
▲
▲
(1)-d
(1)-c