OKI C5900DTN User Manual

Replacing consumable items> 161
REPLACING THE BELT UNIT
The belt unit is located under the four image drums. This unit 
requires replacement approximately every 60,000 pages.
Switch off the printer and allow the fuser to cool for about 
10 minutes before opening the cover.
1.Press the cover release and open the printer’s top cover 
fully.
2.Note the positions of the four cartridges. It is essential 
that they go back in the same order 
WARNING!
If the printer has been powered on, the fuser will be hot....

Replacing consumable items> 162
3.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.
4.Locate the two fasteners (5) at each side of the belt and 
the lifting bar (6) at the front end.
5.Turn the two fasteners 90° to the left. This will release the 
belt from the printer chassis.
6.Pull the lifting bar (6) upwards so that belt tilts up towards 
the front, and withdraw the belt unit from the printer.
CAUTION!
The green image...

Replacing consumable items> 163
7.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.
8.Turn the two fasteners (5) 90° to the right until they lock. 
This will secure the belt unit in place.
9.Replace the four image drums, complete with their toner 
cartridges, into the printer in the same...

Replacing consumable items> 164
FUSER REPLACEMENT
The fuser is located inside the printer just behind the four image 
drum units.
Switch off the printer and allow the fuser to cool for about 
10 minutes before opening the cover.
1.Press the cover release and open the printer’s top cover 
fully.
2.Identify the fuser handle (1) on the top of the fuser unit.
3.Pull the two fuser retaining levers (2) towards the front of 
the printer so that they are fully upright.
4.Holding the fuser by its handle (1), lift...

Replacing consumable items> 165
5.Remove the new fuser from its packaging and remove the 
transit material.
6.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 two locating lugs (3) should be 
towards you.
7.Lower the fuser into the printer, locating the two lugs (3) 
into their slots in the metal partition which separates the 
fuser area from the image drums.
8.Push the two retaining levers (2) towards the rear of...

Replacing consumable items> 166
CLEANING THE LED HEAD
Clean the LED head when printing does not come out clearly, has 
white lines or when text is blurred.
1.Switch off the printer and open the top cover.
2.Gently wipe the LED head surface with LED lens cleaner or 
soft tissue.
3.Close the top cover.
CAUTION!
Do not use methyl alcohol or other solvents on the LED 
head as damage to the lens surface will occur.
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Installing upgrades> 167
INSTALLING UPGRADES
This section explains how to install optional equipment into your 
printer. This includes:
>duplex (two-sided printing) unit;
>additional RAM memory;
>40GB hard disk drive.
>additional paper tray
>cabinet
DUPLEX UNIT
The duplex unit adds the function of two-sided printing, using 
less paper and making large documents easier to handle. It also 
enables booklet printing, which uses even less paper and makes 
large documents even easier to handle.
The duplex unit...

Installing upgrades> 168
5.Print a menu map as follows:
(a)Press the + button to access the Information Menu.
(b)Press ENTER once for the menu map.
(c)Press ENTER again to print the menu map.
(d)When the menu map is printed, press ON LINE to 
exit the menu system.
6.Examine the first page of the menu map.
Near the top of the page, between the two horizontal lines, 
you will see the current printer configuration. This list 
should indicate that the duplex unit is now installed.
All that remains is to...

Installing upgrades> 169
MEMORY UPGRADE
The basic printer model comes equipped with 256MB of main 
memory. This can be upgraded with an additional memory board 
of 256MB or 512MB, giving a maximum total memory capacity of 
768MB.
Installation takes a few minutes, and requires a medium size 
cross-head (philips type) screwdriver.
1.Switch the printer off and disconnect the AC power cable.
2.Press the cover release and open the printer’s top cover 
fully.
3.Lift the front cover latch and pull open the...

Installing upgrades> 170
5.Lift the edge of the side cover slightly at the two points 
shown, and pull the cover away from the printer at the 
top. Lift the cover slightly to detach it from the printer. 
Place it safely to one side.
6.Carefully remove the new memory board from its 
wrapping. Try to handle the board only by its short edges, 
avoiding contact with any metal parts as far as possible. 
In particular, avoid touching the edge connector.
7.Notice that the memory board has a small cutout in the...