OKI C7350DTN User Manual

C7350/7550 User’s Guide: Maintenance   •  481
Maintenance
Adding Paper
The display indicates when the number of sheets of paper in any 
paper tray falls below 30.
1.Remove the paper tray.
2.Remove the remaining sheets of paper.
3.Refill the tray with up to a ream (500 sheets) of paper.  Replace 
the sheets removed in step 2.  This guarantees that the oldest 
paper is used first.  Doing this helps preventing paper jams.  
 paper tray remove.eps 
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C7350/7550 User’s Guide: Maintenance   •  482
4.Check that the paper guides and rear stopper are correct for 
the size of paper being used.
 paper guides.eps and rear paper stopper.eps  
5.Close the paper tray gently.
 
Important!
To prevent jams:
• Make sure there is no space between the paper and the 
paper guides and rear stopper.
• Don’t overfill the paper tray. Capacity depends on the type 
of paper and the paper weight (max 530 sheets of 80gm²).
• Don’t load damaged paper.
• Don’t mix paper of...

C7350/7550 User’s Guide: Maintenance   •  483
6.If installed, a lower paper tray cannot be used to print if there is 
no paper tray inserted above it.  
 multi-trays.eps 
(1)
(2)
9
(1)
(2)
9
(1)
(2)
8
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C7350/7550 User’s Guide: Maintenance   •  484
Changing the Toner Cartridge
 
When the toner is running low, ***** TONER LOW is displayed in 
the control panel (*** is the color name). 
If printing continues without replacing the toner cartridge, CHANGE 
***** TONER is displayed and printing is cancelled. Depending on 
the operating environment, print may become faint before this 
message is displayed. 
At this stage, remove the toner cartridge and check whether it is 
empty.  If so, the toner cartridge...

C7350/7550 User’s Guide: Maintenance   •  485
1.Turn off the printer.
2.Open the top cover.
 open top cover.eps  
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C7350/7550 User’s Guide: Maintenance   •  486
3.Check the color label of the toner cartridge to be changed.
4.Locate the colored lever (1), on the right side of the toner 
cartridge. Move it (as shown by the arrow) as far as it will go.
5.Lift the lever end of the cartridge. This disengages the locating 
peg on the image drum from the toner cartridge.
  toner cartridge remove.eps 
6.Remove the toner cartridge (2).  
CAUTION!
Dispose of the toner cartridge in accordance with local 
legislation....

C7350/7550 User’s Guide: Maintenance   •  487
7.Unpack the new toner cartridge and remove the orange 
shipping clip.
  toner clip remove.eps  
8.Shake the new toner cartridge back and forth several times. 
Then holding the toner cartridge horizontally, remove the tape.
  toner shake.eps and  toner tape remove.eps  
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C7350/7550 User’s Guide: Maintenance   •  488
9.Insert the new toner cartridge into the image drum, left side 
first, engaging the drum locating peg in the hole in the toner 
cartridge.
  toner cartridge install 1.eps 
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C7350/7550 User’s Guide: Maintenance   •  489
10.Gently push the toner cartridge down, engaging the locking pin 
into the groove on the image drum.
 toner cartridge install 2.eps  
11.Gently push the colored lever forward until it stops. This 
releases the toner into the image drum.
 toner cartridge install 3.eps 
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C7350/7550 User’s Guide: Maintenance   •  490
12.Gently wipe the LED head surface with LED lens cleaner or a 
soft tissue.
  LED head clean.eps  
 
13.Close the top cover. close top cover.eps 
  
CAUTION
Do not use methyl alcohol or other solvents on the LED 
head. These solvents damage the lens surface.
NOTE
After installing the new toner cartridge, the message on 
the display TONER LOW or CHANGE TONER should 
disappear. However, this sometimes does not disappear 
until printing has been carried out. If...