Original Scanning - Kyocera Mita KM-1530 Service Manual

(1) Original scanning

The original image is illuminated by the exposure lamp (EL) and scanned by the CCD PCB (CCDPCB) in the image
scanning unit via the three mirrors, the reflected light being converted to an electrical signal.
The scanner and mirror frames travel to scan on the optical rails on the front and rear of the machine to scan from side to
side. The speed of the mirror frames is half the speed of the scanner. When the DF* is used, the scanner and mirror
frames stop at the DF original scanning position to start scanning.
* Optional.
SHPSW
Start key
Fwd. rotation
SM
Rev. rotation
1078 P
DM
RSW
a: When the start key is pressed, the scanner motor (SM) reverses for 1078 pulses and then turns off.
b: 168 pulses after the scanner motor (SM) rotates in the reverse direction again, the scanner motor (SM) turns off.
c: 178 ms after the leading edge of the paper turns the registration switch (RSW) on, the scanner motor (SM) rotates
forward to start original scanning.
d: The scanner motor (SM) rotates forward for 5294 pulses and then rotates in the reverse direction.
e: 4048 pulses after the scanner motor (SM) rotates in the reverse direction, the scanner motor (SM) turns off.
Original
EL
INPCB
MPCB
Figure 2-1-7 Optional section block diagram
178 ms
168 P
Copy paper: A4/11" × 8
Timing chart 2-1-4 Scanner operation
CCDPCB
SM
5294 P 4048 P
1
/ ", magnification ratio 100%
2
2AV/X
2-1
2-1-7