Laser Exposure Process - Minolta CF910 Service Manual

1154SBM1002A

10-2. Laser Exposure Process

Press the Start Key.
Laser Diode (LD1) is forced to emit light.
The laser beam strikes the SOS Board via the polygon mirror, lens, and mirror, which generates an
SOS signal.
The SOS signal is input to PH Control Board (Digital) PWB-JD, which ensures that LD1 is turned ON
at the same timing for all main scanning lines.
PWB-JD generates an HIA signal, HIA inside signal (main scanning) and VIA signal (sub-scanning)
that indicate the laser beam area in the main and sub-scanning directions.
PH Control Board (Analog) PWB-JA outputs an LD1-driving analog voltage representing the image
data in synchronism with the SOS, HIA, HIA inside, and VIA signals, turning ON the LD1.
The laser beam is directed at the surface of the PC Drum to form an electrostatic latent image.
M-45