Service manual

2DA/2DB
2-1-5
(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 DP is used, the scanner and mirror
frames stop at the DP original scanning position to start scanning.
Figure 2-1-4 Optional section block diagram
Original
INPCB
CCDPCB
MPCB
EPCB
PDPCB
APCPCB
OSDS
ODSW
SHPSW
OSDS
ODSW
SHPSW
EL
EL ON SM
PDN
SM
PM
LSU
PM
YC2-1
YC8-1-
YC8-18
YC7-1-
YC7-7
YC1-1-
YC1-7
YC2-2
YC6-1-
YC6-22
YC1-1-
YC1-22
YC3-3
YC2-3
YC1-1,6
YC17-1,6
YC19-2
YC18-5
YC18-2
YC16
-1,2,3,4