OKI C3520 MFP User Manual

							
Maintenance > 91
8.Holding the complete assembly by its top centre, lower it 
into place in the printer, locating the pegs at each end into 
their respective slots in the sides of the printer cavity.
9. Close the printer top cover and press down firmly so that 
the cover latches closed.
10. Gently  lower the scanner on to its supports.
C,M,Y
NOTE
If you need to return or transp ort your printer for any reason, 
please make sure you remove the image drum unit 
beforehand and place in the ba g provided. This is to avoid 
toner spillage.
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Maintenance > 92
TRANSFER BELT REPLACEMENT
The belt unit is located under the four image drums. This unit 
requires replacement approximately every 50,000 pages.
1.Switch the MFP  OFF.
2. Lift the scanner.
WARNING!
If the printer has been powe red on, the fuser will be 
hot. This area is clearly labelled. Do not touch.

						

							
Maintenance > 93
3.Press the cover release (a) and open the top cover of the 
printer (b) fully.
4. Note the positions of the 4 cartridges/toner cartridges.
It is essential that they  go back in the same order  
a
b
1
2
3
4
1.Cyan cartridge 2.Magenta cartridge
3. Yellow cartridge 4.Black cartridge
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Maintenance > 94
5.Starting from the rear, lift each of the image drum units, 
out of the printer and place them in a safe place away 
from direct sources of heat and light.
CAUTION!
The green image drum surface at the base of each 
cartridge is very delicate  and light sensitive. Do not 
touch it and do not expose it  to normal room light for 
more than 5 minutes. If the drum unit needs to be out 
of the printer for longer th an this, please wrap the 
cartridge inside a black plastic bag to keep it away 
from light. Never expose th e drum to direct sunlight 
or very bright room lighting.
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Maintenance > 95
6.Locate the two fasteners (a) at each side of the belt (b) 
and the lifting bar (c) at the front. Turn the two fasteners 
90° to the left. This will release the belt from the printer 
chassis.
7. Pull the lifting bar (c) upwards so that belt tilts up towards 
the front, and withdraw the belt unit from the printer.
a
a
b
c
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Maintenance > 96
8.Lower the new belt unit into place, with the lifting bar at 
the front and the drive gear towards the rear of the 
printer. Locate the drive gear into the gear inside the 
printer by the rear left corner of the unit, and lower the 
belt unit flat inside the printer.
9. Turn the two fasteners (a) 90° to the right until they lock. 
This will secure the belt unit in place.
a
a
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Maintenance > 97
10.Replace the 4 image drums, complete with their toner 
cartridges, into the printer in the correct positions as 
shown.
5. Close the printer top cover and press down firmly so that 
the cover latches closed.
6. Gently  lower the scanner on to its supports.
7. Switch the MFP  ON.
1. Cyan cartridge 2.Magenta cartridge
3. Yellow cartridge 4.Black cartridge
1
2
3
4
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Maintenance > 98
FUSER REPLACEMENT
The fuser is located inside the printer just behind the four image 
drum units.
1.Switch the MFP  OFF.
2. Lift the scanner.
WARNING!
If the MFP has recently been powered on, some fuser 
components will be very ho t. Handle the fuser with 
extreme care, holding it only  by its handle, which will 
only be mildly warm to the touch. A warning label 
clearly indicates the area. If in doubt, switch the 
printer off and wait at leas t 10 minutes for the fuser to 
cool before openin g the printer cover.

						

							
Maintenance > 99
3.Press the cover release and open the printer’s top cover 
fully.
4. Identify the fuser handle (1) on the top of the fuser unit.
5. Pull the two fuser retaining levers (a) towards the front of 
the printer so that they are fully upright.
6. Holding the fuser by its handle (1), lift the fuser straight 
up and out of the printer. If the fuser is still warm, place it 
on a flat surface which will not be damaged by heat.
a
b
a
a
1
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Maintenance > 100
7.Remove the new fuser from its packaging and remove the 
transit material.
8. Holding the new fuser by its handle, make sure that it is 
the correct way round. The retaining levers (2) should be 
fully upright, and the locating lugs (3) should be towards 
you. There is one locating lug at each end of the fuser. 
9. Holding the fuser by its handle , lower it into the printer, 
locating the two lugs  into their slots in the metal partition 
which separates the fuser area from the image drums.
32
2
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