Specifications

Chapter 5: Wiring Diagrams
5-15
MCU PWB and the ROS Assembly
Signal Line
Name
Signal Line Description
DATA Command signal from the MCU PWB to the LD Assembly. (LD ON(L)
3.7VDC)
MO Monitor signal that controls LD output
VL2, VL1 LD output control
5VDCLD Power source for the LD Assembly
SPI2, SPI1 Rotation control for the Scanner Motor
SOS Start of Scan reference signal sent to the Scanner Motor. The signal is sent
when the laser beam strikes the SOS Sensor.
The table below shows the logic states of SPI 2 and SPI 1 when they are controlling the rotation
of the Scanner Motor . H=High(4.1 VDC). L=LOW (0 VDC).
Print
Resolution
SPI 2 Logic state SPI 1 Logic state
600 H H
300 L H
The illustration below shows the waveforms of the signal lines DATA, MO, and SOS. The printer
is in Printing Test Mode and the status is READY TO PRINT.