LASER CLASS 730i/720i/710 Chapter 2: Technical Reference
2-19
5. NEW FUNCTION
5.1 Twin Beam Method (Laser/Scanner System)
Figure 2-7 Laser/Scanner Unit
The Laser/Scanner unit is structured with the laser driver, the scanner motor and etc. It is
controlled by the signals input from the ECU board and the SCNT board.
This machine employs the “Twin beam method” which scans two lines simultaneously with two
laser diodes in the Laser/Scanner unit.
These two diodes (LD1, LD2) emit for a single scanning so that two lines are written
simultaneously. Thus, this method enables high-resolution printing without decreasing the print
speed.
SCNT board
ECNT board
BDI
nVDATA1
nACC
nDEC
CNT0
VDATA1
Laser driver
Focusing lens
Cylindrical lens
BD mirror
Scanning mirror
Scanner motor
Mirror
CNT1
CNT2
nVDATA2
VDATA2
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