Operating
Manual
2.1.3.5
Laser Diode Drive
Figure 2-30 is a laser diode drive
Laser diode emission is
by four signals (DATA,
and
from the engine controller board (MC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DATA
MO 4
●
●
●
4
Bead
(MCU
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2-30. Laser Diode Drive Circuit
The DATA signal is the laser on/off signal. When it is LOW, the laser is allowed to emit and when
it is HIGH, the laser is stopped.
The MO is the laser emission power monitor analog signal. The engine controller board (MC
adjusts the laser emission power by
and VLl signals.
and
are laser emission power
adjust signals, they are analog signals.
If the
signal is not detected, it will be judged that there ia a laser diode
malfunction.
If the SOS signal is not detected, it would be judged as a scanner motor malfunction.
2-18
Rev.
