AGFA d-lab.3 Digital Compact Lab

Printer
Repair
Connection of the polygon control:
The polygon drive on the Laser module receives
through ST19:
− the supply voltage of 24V
− an On/Off signal and
− a feedback signal: Required speed reached
The polygon frequency is provided by the quartz
oscillator MC6 (1,43332MHz / 2 10 = 1,3997kHz) via
ST19.
Feed and exit roller drive (ST11):
It is controlled by an electronic potentiometer set by
the Controller. The corresponding actual parameter
is recorded by the Controller via ST13 as rotation
period of the roller. The control voltage of the 24V
motor varies between 8 and 14V.
Sensor signals:
The signals of the connected light sensors are
directly sent to the Controller. They can be traced
on the male connector strip ST29.
Sheet tip sensor PE_LS05 (2):
The sheet tip sensor supplies via ST15 a frequency
that is proportional to the light reflected by the
paper. The duration of the period is checked by the
Controller and serves to generate the signal BOP on
ST5.
Exposure start sensor PE_LS06 (1):
Connection of the Laser diode control: On ST5, a
differential facet sync signal is applied and a DARK
signal for the Laser diode triggering is received. The
generated BOP signal and the beginning-of-line
signal from ST6 are sent differentially through ST5.
The activation of the red Laser diode is supplied by
an analogue voltage of ±9V through ST21 which is
sent to the printed circuit through ST 20.
1 Polygon control
dlabrc48
dlabr097
dlabr098
6.3.40 2001-01-02 /PN 9009 AGFA d-lab.3