Read Sharp AL-1045 (serv.man8) Service Manual online
information on copy conditions is sent to the MCU.
visible images(toner images).
discharged onto the exit tray.
MCU to the LSU. The procedures after that are the same as above 5)
according to the conditions requested by the PC or set by the opera-
tions with the operation panel.
Laser diode, Polygon mirror lens
performs scanning in the main scan direction with the light receiving
elements (color CCD). The drive unit performs scanning in the sub
scanning direction by moving the optical unit.
document table. The reflected light from the document is reflected 5
times by No. 1 - No. 3 mirrors and passed through the reduction lens to
form images on the light-receiving surface of 3-line CCD.
scanning sections for RGB. Separate images scanned in each color
section are overlapped to complete color scanning. (When PC scan-
the idle pulley, the idle gear, the belt 473, the belt 190, and the shaft.
belt 473 through the idle gear, the pulley gear, the belt 190, and the
idle pulley to drive the optical unit.
Lamp current : 5mA
Temp. : 25 degree
the LSU (laser unit), where it is converted into laser beams.
formed on the OPC drum by the polygon mirror and f
lens, the polygon mirror, the f
is provided with the APC (auto power control) in order to eliminate fluc-
tuations in the laser power. The BD PWB works for measurement of
the laser writing start point.
No. of mirror surfaces: 6 surfaces
ends of the drum same as each other.
(Refer to the figure below.)
used for the lower heat roller for better toner fusing performance and
tor pawls are Teflon coated to reduce friction with the roller and prevent
a smear on the paper caused by the separator pawl.
temperature in the fuser unit.
To prevent against abnormally high temperature in the fuser unit, a
thermal breaker and thermal fuse are used for safety purposes.
set to 100°C.
improve transfer efficiency.
contains moisture and the distance between the transfer unit and the
fusing unit is short, the transfer current may find a path to ground via
the copy paper, the upper heat roller and the discharging brush.
paper feed. The tray is of universal-type, and has the capacity of 250
the front cabinet.
feed operation are given below.
(thermal breaker, thermal
power supply unit)
of the upper heat roller is
sensed by the thermistor.
controlled by the main PWB.
main PWB, the triac is
controlled on and off.
(power supply PWB)