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4) Transition of photoconductor surface potential
Charge
-730V
-215V
5) Photoconductor drum sensitivity correction
In this model, fall in sensitivity due to long use of the photoconductor
drum is corrected by the copy lamp light intensity to prevent against
considerable change in copy quality.
The photoconductor drum sensitivity fall correction is performed as
follows:
Cleaner
OPC drum
6) Process control function
[Summary]
The process control function detects the density of the standard toner
image formed on the photoconductor, the density of the initial image
and controls the charging grid voltage so that the same level as the
initial image density is provided.
That is, the process conditions are established and the high voltage
output and exposure level are controlled to stabilize the toner density.
In this model, the density sensing level is automatically set.
Develop
Exposure
BL
Dark area
Developing bias voltage
Light area
Develop
Change the tickness of the carrier transport layer (CTL).
By the developper.
By the cleaner blade.
CLV
Sim46
Transfer Separate
Residual potential
(NEW)
CTL
CGL
R
MAin control PWB
CPU density
judgement
I/O MC grid
output selection
5 – 14
Clean
D L
(USED)
CTL
CGL
Time
F
High voltage PWB
MC grid bias
output (density
correction)
in each mode
(Light quantity
correction)
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