Control System Structure; Electrical System And Function - Lexmark C720 Service Manual

5024-001

Control System Structure

Electrical System and Function

The main engine (MCTL P.W.B.) board controls most of the main
electrical parts in this printer.
No. Control Process
1 Print process
control
2 Laser output
control
3 Fuser
temperature
control
4 Toner sensing
control
5 Interface control
(video signal)
6 Operator panel
indicator
7 Error control
8 Receiving signal
from engine
1-42
Service Manual
Outline of Function
Controls the print process from paper feed
through paper exit.
Automatically controls the laser output to
the default.
Controls the fuser heater so the fuser roller
and the back-up roller reach the
temperature.
Controls the sensing procedures of toner
empty status.
Processes the input and output signal with
the external controller computer.
Displays the printer operation status in the
operator panel indicator.
Controls the safe stop procedures when
errors occur in the printer.
Operator selection.