132 Theory of operation ENWW
Laser control
The laser control instructs the laser driver to turn on/off the laser diode according to the LASER
CONTROL signal sent from the DC controller.
The laser driver PCB is divided into two. One is for Y/M, and the other for C/K. The Y/M laser driver
PCB only is described here, as both are identical.
Figure 5-20 Laser control block diagram
The DC controller sends the VIDEO signals (VDO, /VDO) for forming images and the LASER
CONTROL signals (CTRL0, CTRL1) for switching the operation modes of the laser driver circuit to
each laser driver IC (IC101, IC102). The laser driver IC controls the laser according to the
combination of the LASER CONTROL signals.
The following table shows the combination of the LASER CONTROL signals for yellow.
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