Samsung SF4500 Disassemble
Samsung Electronics 4-1
4. Disassembly and Reassembly
4-1 General Precautions on Disassembly
When you disassemble and reassemble components, you must use extreme caution. The close proximity of cables
to moving parts makes proper routing a must. If components are removed or replaced, any cables
disturbed by the procedure must be replaced as close as possible to their original positions. Before removing any
component from the machine, note the cable routing that will be affected.
Whenever servicing the machine, you must perform as follows:
1. Check to verify that documents are not stored in memory.
2. Move the printer cartridge to far right to cap the nozzle.
3. Unplug the power cord.
4. Use a flat and clean surface.
5. Replace only with authorized components.
6. Do not force plastic-material components.
7. Make sure all components are in their proper position.
1. Lift the control panel using hand.
2. Push the bushing on both ends of the roller slightly inward, then rotate it until it reaches the slot as
shown below. Then lift the roller out.
Note : Check the roller for any dirt. If dirty, wipe it
off with soft cloth dampened with water. If
the roller is heavily worn, replace it with a
new one.
4-2 White Roller Ass’y
Bushing
White roller
Control panel
B
A
4-2 Samsung Electronics
Disassembly
4-3 Top Cover Ass’y
1. Lift the control panel and open the print
cartridge compartment cover. Remove the white
roller ass’y. Remove the six screws shown below.
2. Remove the print cartridge. Remove the two
screws shown below and take out the top cover
ass’y.
Note: When you reassemble the top cover ass’y,
make sure the tabs in the bottom of the ass’y fit
into the slots in the base ass’y.
Control panel
Cartridge compartment
cover
Top cover ass’y
Base ass’y
Samsung Electronics 4-3
Disassembly
4-4 Rear Cover Ass’y
1. Holding the paper guide, move it in the direction
of arrow.
2. Remove the storage Unit, and remove the six
screws shown below.
3. Holding the rear cover ass’y, take it out by
rotating it to be released properly.
Paper guide
Rear cover ass’y
Rear cover ass’y
4-4 Samsung Electronics
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.
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. 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.
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.
ADF roller
Drive roller
Exit shaft
CIS ass’y
Drive roller
CIS harness
Spring
Mono
Bracket
CIS
Spring
Color
Bracket
CIS
Samsung Electronics 4-5
Disassembly
4-5-3 Scan Motor
1. Before you disassemble the CIS, you should
remove:
– Top Cover Ass’y (see page 4-2)
– Rear Cover Ass’y (see page 4-3)
2. Unplug the motor connector from the main PBA.
Make sure the harness is released from two hooks
securing the harness as shown below.
3. Remove the two screws as shown below and take
out the scan motor ass’y.
4. Remove the two screws securing the motor to the
motor bracket.
Main PBA
Motor harness
Hook1
Hook2
Scan motor ass’y
Motor bracket
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