Kyocera Mita KM-4530, Service Manual

Page: 301 / 384

2BC/D
2-1-19
410 P
414 P
9921 P
110 P
Manual copy density control, copy paper: A3/11"
×
17", magnification ratio 100%
Start key
SM
Fwd. rotation
Rev. rotation
SHPSW
FVSYNC signal
Timing chart 2-1-6 Scanner operation
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
Oject mirror
Glass dust filter
Cylindrical correcting lens
BD sensor
Motor drive PCB
Polygon motor (PM)
Polygon mirror
Lens 2
Lens 3
Lens 1
Beam spritter
Collimator lenses
Laser diodes (LD)
LD control PCB
BD sensor mirror
Figure 2-1-20 Laser scanner unit (1)