Original Scanning; Optional Section Block Diagram; Timing Chart 2-1-4 Scanner Operation - Kyocera KM-3035 Service Manual

2FD/2FF/2FG

(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.
Start key
Fwd. rotation
SM
Rev. rotation
SHPSW
FVSYNC signal
a: When the start key is pressed, the scanner motor (SM) reverses for 338 pulses and then rotates forward.
b: 472 pulses after the scanner motor (SM) starts rotating forward, the FVSYNC signal turns on for 9922 pulses for
scanning.
c: The scanner motor (SM) reverses for 10394 pulses and then rotates forward.
d: 200 pulses after the scanner home position switch (SHPSW) turns on, the scanner motor (SM) reverses.
e: 200 pulses after the scanner home position switch (SHPSW) turns off, the scanner motor (SM) turns off, and the
scanner stops at its home position.
2-1-8
SM
SDPCB
Figure 2-1-8 Optional section block diagram
338 P
472 P

Timing chart 2-1-4 Scanner operation

EL
YC3-1-
CN1-1-
YC3-2
CN1-2
INPCB
MPCB
10394 P
9922 P
Original
CCDPCB
200 P
200 P