LD Drive Board

The LD unit contains two LD drive boards, and the beam system is a four-beam type.

The LD drive board contains an LD (laser diode), PD (photodiode), and LD control unit.

• The LD outputs the laser light to the PCU.
• The PD continuously detects laser light from the LD, and feeds a signal based on the intensity back to the LD control unit.
• The LD control unit adjusts the intensity of the LD output based on the output signal from the PD.

LD control board adjustment is not required in the field.