IV-29
<Layout & Function of the Electrical Parts>
(1) Print PCB (Refer to Fig. 4-29.)
No. Name Function
1 Video Controller PCB
To receive the print data from the host computer,
convert it into image data and then send the
printing image data to the MCTL PCB.
2
Engine Controller
(MCTL) PCB
To control the sequence of processes of the
printer: Fusing Temperature Control, Laser Output
Control, Control Panel Indications, Toner Empty
Sensing Control, Error Processing Control,
Interface Control.
3 Control Panel PCB
To display the printer’s operation status and
support the control panel switches.
4 LDU PCB
To control the drive and output to the laser diode
in the scanner unit.
5 PDU PCB
To sense the emission of the laser diode and the
beam position in the scanner unit.
6 Erase Lamp To discharge the OPC belt with the LEDs.
7 IOD1 PCB
To send the signals from the sensors to the MCTL
PCB, and to drive the outputs from the MTCL PCB
to the motors, clutches and solenoids.
8 IOD2 PCB - Ditto -
9
DC Power Supply
(LVPS) PCB
To provide the printer with the power for printer
control.
10
High-voltage Power
Supply (HVU) PCB
To provide the printer with the high voltage power
supplies necessary for the printing process.
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