Image Printing - Kyocera Mita KM-4530 Service Manual

Start key
Fwd. rotation
SM
Rev. rotation
SHPSW
FVSYNC signal
a When the start key is pressed, the scanner motor (SM) reverses for 410 pulses and then rotates forward.
b 414 pulses after the scanner motor rotates forward, the FVSYNC signal turns on for 9921 pulses for scanning.
c The scanner motor (SM) reverses to return the scanner to the home position.
d 110 pulses after the scanner home position switch (SHPSW) turns on, the scanner motor (SM) turns off, and the
scanner stops at its home position.

(2) Image printing

The image data scanned by the CCD PCB (CCDPCB) is processed on the main PCB (MPCB) and transmitted as image
printing data to the laser scanner unit (LSU). By repeatedly turning the laser on and off, the laser scanner unit forms a
latent image on the drum surface.
• Laser scanner unit
Cylindrical correcting lens
Glass dust filter
410 P
414 P
Manual copy density control, copy paper: A3/11" × 17", magnification ratio 100%
Timing chart 2-1-6 Scanner operation
BD sensor mirror
Lens 3
Oject mirror
BD sensor
Lens 2
Figure 2-1-20 Laser scanner unit (1)
9921 P
Collimator lenses
Beam spritter
Lens 1
Polygon mirror
Polygon motor (PM)
Motor drive PCB
110 P
Laser diodes (LD)
LD control PCB
2BC/D
2-1-19