Minolta Di 620 Manual page 71

PC Drum
SOS
Sensor
SOS Mirror
Board
D C
B A
A to B: LD force-ON area
B to C: LD OFF
1155M087CA
C to D: Laser beam area according to the image data 1155M087CA
A
Laser Diode
ON
(LD)
OFF
H
SOS Signal
L
A : Varies depending on the image area (paper size and zoom ratio).
1155T41MCB
M-52