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Re: I have Oki B4350 printer. The print on both edges
Depending on the age of the model, it could be a couple of things.
***Never touch the drum or expose it to bright light***
The drum unit is bad. It's the shiny brightly-colored large roller in the center of the machine. On most recent smaller machines like this on it's integrated into the toner cartridge. Check it out. If it has toner build up on the ends, it's bad.
The corona wires need cleaning. Some machines have a small slide that moves from one side of the printer to the other which cleans the hidden corona wires. It's usually brightly colored
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Is it a OEM cartridge, which means that its made but the manufacturer of the printer. If it is a refurbished cartridge then it will probably not be "recognized" by the printer and subsequently tell you its low on ink.
You should certainly start by looking at the toner cartridge to see if there is any tape to remove. If there is no tape with a visible pull tab, check inside the printer to make sure that there are no pieces of torn paper stuck anywhere inside.
As per this excerpt from the Oki B4350 User manual:
"FACE UP AND FACE DOWN PRINTING For face down printing, make sure the rear paper exit tray is closed (the paper exits from the top of the printer). The paper exit bin on the top of the printer stacks printed pages face down, capacity 150 sheets of 20 lb. paper. Pages printed in reading order (page 1 first) will be sorted in reading order (last page on top, facing down).
For face up printing, make sure the face up rear paper exit tray is open and the paper guide is extended if required. In this condition, paper will exit via this path, regardless of driver settings. Paper is stacked in reverse order, capacity 50 sheets of 20 lb. paper.
Always use this tray and the manual feed tray for heavyweight stocks to reduce the possibility of paper jams."
This manual is available at http://my.okidata.com/mandown.nsf/(MOC-B4350)/BE70FCAF93D577E285256E89005052F9?OpenDocument
This type of printing defect is normally caused by 1 of a few problems - the easier one first:
1. Toner cartridges sometimes do not have the toner evenly distributed - close the toner cartridge and inspect the hopper right below it for even distribution of toner.
The harder ones:
2. This type of defect can also be caused by dirty charging section - for the drum to pick up the toner it must be charged electrically prior to exposure - if the charge grid is not clean then it will not give the drum an even charge - not sure were this is in this printer yet - looks like it comes as part of the drum kit so this should not be causing this issue.
3. The last and most difficult to check is paper alignment with the drum - is the paper contacting the drum evenly - look for possible problems in the paper path with the drum unit removed - look for something uneven around the area were the paper contacts the drum