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Mentioned below in brief is the printing
process:
In one of the stages the
primary charge roller places a uniform negative DC bias voltage on the
opc drum surface. The amount of the negative DC bias placed on the drum is controlled
by the printers intensity setting. This process is called conditioning. Hence the
need to change the primary charge roller every cycle to give a uniform negative
DC bias. Non compliance of the above might lead to faulty printing
In another stage the laser beam is
fired on to a rotating mirror called the scanner. As the mirror rotates, the beam
reflects into a set of focusing lens. The beam then strikes the opc surface leaving
a latent electrostatic image on the drum. The opc drum should be
mint new, as otherwise image distortion would take place
In secondary stages the toner image
is developed on the drum by the developing section which contains the toner particle.
The toner is held to the magnetic roller sleeve by the stationery magnet inside
the sleeve and the DC bias voltage supplied by the high voltage power supply. Critical
to note here is that the toner powder used, should be of the highest
quality for proper attraction by the magnetic sleeve. Also important to note is
that the magnetic sleeve is to be replaced in all cycles due to
its critical function of proper attraction of the toner powder.
In the waste bin section, the
wiper blade performs the all important function of cleaning the opc drum.
If the blade is not changed, it leads to flip overs and spills leading to dots over
the printout and subsequent printer damage. Hence it is imperative to change the
wiper blade very cycle.
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