C451 Faint line printing issues!

[KonicaMinolta451user]

Please help!! I have a C451 that has started to print faint red lines down the length of the page. First, I cleaned the fuser area of toner dust with a lint free cloth. That seemed to fix the issue for a small number of card stock prints. However, when I went to print again from Tray #2, the issue came up again. The lines only show up on the side of the paper that is being printed on. If I do one sided printing the non printed side of the paper is completely clear. If I do two-sided printing the lines show up on each side of the paper. I have attached a few pictures to illustrate the issue. If you need me to take better pictures I can do so (My camera is kinda dated, Sorry lol!). Any help would be greatly appreciated!!

P1010200.jpgP1010201.jpgP1010204.jpgP1010199.jpgP1010203.jpgP1010202.jpg

[darry1322]

Re: C451 Faint line printing issues!

Most likely a problem with the magenta image unit. What is the life on that unit?

Use the cleaning rod to clean the charge unit on the magenta unit. May as well clean the others as well.

[totoro]

Re: C451 Faint line printing issues!

I don't work on this product , but the first thing I would check would be the magenta drum and developer units. Does it do this on B\W prints?

[KonicaMinolta451user]

Re: C451 Faint line printing issues!

P1010205.jpg

Most likely a problem with the magenta image unit. What is the life on that unit?

Use the cleaning rod to clean the charge unit on the magenta unit. May as well clean the others as well.

I thought a picture would be best to show you Should still have some life left in it. Im cleaning the imaging unit now. . Will see how it works in a bit. . .

[darry1322]

Re: C451 Faint line printing issues!

That shows plenty of life should be left in the unit (assuming it hasn't been reset ).

The cleaning rod for the charge unit is the one that stays in the image unit. You simply pull the rod out of the front of the IU until it stops and then slide it back in. Do that three or four times to clean the charge unit for each image unit. The rod that is in the top of the paper tray is for cleaning the writing unit and would be used in case of light streaks.

[KonicaMinolta451user]

Re: C451 Faint line printing issues!

I don't work on this product , but the first thing I would check would be the magenta drum and developer units. Does it do this on B\W prints?

I just tried it. The lines don't appear on the B/W prints. . .

[KonicaMinolta451user]

Re: C451 Faint line printing issues!

That shows plenty of life should be left in the unit (assuming it hasn't been reset ).

The cleaning rod for the charge unit is the one that stays in the image unit. You simply pull the rod out of the front of the IU until it stops and then slide it back in. Do that three or four times to clean the charge unit for each image unit. The rod that is in the top of the paper tray is for cleaning the writing unit and would be used in case of light streaks.

I ran the cleaning rod in the magenta image unit and also in the other units as well. When I ran the test page, the streaks are still there.

[KonicaMinolta451user]

Re: C451 Faint line printing issues!

I ran the cleaning rod in the magenta image unit and also in the other units as well. When I ran the test page, the streaks are still there.

There was no trace of magenta toner on the cleaning rod once I took it out. The pictures were taken after I cleaned the image units.
P1010208.jpgP1010209.jpg

[darry1322]

Re: C451 Faint line printing issues!

I would replace the magenta image unit.

[KonicaMinolta451user]

Re: C451 Faint line printing issues!

I would replace the magenta image unit.

Is there any other way to clean it before I purchase a new one?

[darry1322]

Re: C451 Faint line printing issues!

You could likely disassemble the IU to better clean the charge unit.
The grid and charge wire need to be completely clean to avoid dark streaks.
While the rod gives them a decent cleaning, it's probably inefficient for a really dirty grid or wire.
We've always just replaced units when needed.

[KonicaMinolta451user]

Re: C451 Faint line printing issues!

You could likely disassemble the IU to better clean the charge unit.
The grid and charge wire need to be completely clean to avoid dark streaks.
While the rod gives them a decent cleaning, it's probably inefficient for a really dirty grid or wire.
We've always just replaced units when needed.

Hmmmm, interesting. I may just try to disassemble it today and if it doesn't work, then I'll buy a new one anyway. What does the the grid and charge wire look like so I know what areas to clean? Google searching it now. . . .

[blackcat4866]

Re: C451 Faint line printing issues!

The charge unit will look like a "C" shaped formed metal channel the length of the image unit, with plastic insulators at the opposite ends, and a very thin wire strung between the insulators. Clean the wire, grid, and "C" channel with alcohol and swabs. Be careful with the wire. If it breaks, you will definitely be buying an assembly. =^..^=

[darry1322]

Re: C451 Faint line printing issues!

The wire is a VERY thin uninsulated wire about the size of a human hair.

[KonicaMinolta451user]

Re: C451 Faint line printing issues!

The charge unit will look like a "C" shaped formed metal channel the length of the image unit, with plastic insulators at the opposite ends, and a very thin wire strung between the insulators. Clean the wire, grid, and "C" channel with alcohol and swabs. Be careful with the wire. If it breaks, you will definitely be buying an assembly. =^..^=

Gotcha! Will try it today! Thank you!!