Samsung SF-4500 Service Manual page 18

Disassembly
4-5 Base Ass'y
4-5-1 Rollers (ADF Roller, Drive Roller,
Exit Shaft)
1. Before you disassemble the rollers, you should
remove:
– Top Cover Ass'y (see page 4-2)
2. Take out the rollers from the base ass'y.
Drive roller
Exit shaft
Note : Clean the surface of the rollers with ethyl alco-
hol. After wiping them, you must dry them
completely.
4-5-2 CIS (Contact Image Sensor)
1. Before you disassemble the CIS, you should
remove:
– Top Cover Ass'y (see page 4-2)
2. Remove the drive roller as described in '4-5-1
Rollers'.
3. Remove the one screw securing the CIS ass'y and
unplug the CIS harness. Take out the CIS ass'y.
4-4
ADF roller
CIS ass'y
4. Turn the CIS ass'y over. Remove the one screw to
release the CIS from the bracket.
Note: Be careful not to lose the springs.
Mono
Bracket
Color
Bracket
Note : Check the glassy surface of the CIS for any
stain or scratch. If stained, wipe off with ethyl
alcohol. If it is heavily stained or scratched,
replace it with a new one.
Note : There is a little difference mono bracket and
color bracket.
Drive roller
CIS harness
CIS
Spring
CIS
Spring
Samsung Electronics