Question about Brother MFC 7420 All-In-One Laser Printer

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Vertical black line on all print outs

I've changed the toner, I've cleaned everything, still have the vertical black line from top to bottom of every page, print outs and copies

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1) Check the cartridge. Look at the egg color drum and see if there is any built up toner. If there is then wipe off with soft cloth and reinstall.
2) Does this happen when coping from the flat bed and the doc feeder at the top?
If it it's only from the top then there is a glass lense that might have white out on it.
This is common when using white out and not letting it dry long enough.
To get to the lense it my be tricky but if the top of the feeder open a little from the top pop it open and
the glass is a thin 1/4 strip. Wipe it clean then try again. Hope this helps. Boats

Posted on Oct 07, 2008

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Canon irc4580i print dark problem


In the process used printer, will be inevitable printed page by your printer have the bad quality prints. For example: Toner specks, Light image, Vertical line, Dropouts, background, Toner smear, Vertical black line and band, Vertical white line, Background scatter, Black pages, Loose toner, Horizontal stripes, Ghost, Uneven Density, poor fusing ...
The common print quality problem Canon IRC-4580 printer
Currently, The Canon IRC-4580 is the laser printer have high speed, easy to use, friendly for user and printing clear text.
However, we can not avoid the damage of some components of the printer when used.
In this article, I will introduce some basic errors with printing quality problems of Canon IRC-4580 printer and "How to fix it".
After viewed artical, you know:
- How to fix (repair/solve) Vertical line (black or white) in Canon IRC-4580 printer
- How to fix (repair/solve) Poor fusing (loose toner) in Canon IRC-4580 printer
- How to fix (repair/solve) Uneven Density in Canon IRC-4580 printer
- How to fix (repair/solve) Light image in Canon IRC-4580 printer
- How to fix (repair/solve) Ghost in Canon IRC-4580 printer
1. Fix print quality problem "Vertical line" for Canon IRC-4580 printer How to fix print quality problem Vertical line
This plobrem "Vertical line" is usally error of Canon IRC-4580 printer. For this "Vertical line" error, technicians divided into two smaller error are: Vertical black line and band and Vertical white line.
Description:
- Vertical line and band: On the printed image appear some straight thin black vertical.
- Vertical white line: On the printed image appear some white vertical voids.
Error location:
- Surface of the charge roller
- OPC drum
- Cleaning blade
- LSU unit
- Developing roller

Cause of error "Vertical line" on the printed page:

- May be surface of charge roller scratched or dirty by toner powder.
- May be have some grooves on the OPC drum.
- May be cleaning blade is damaged.
- May be LSU window or LSU lense has dirty.
- May be surface of developing roller has scratched.

How to fix(repair) "Vertical black Line and Band" for {{SPkey1}} machine:

- Replace the charge roller of toner cartridge.
- Replace the OCP drum.
- Replace the cleaning blade
If printed page are not improved
- Clean the LSU unit by soft cotton cloth and try to print. If Vertical line is not clear on the printed page you should replace LSU unit.
- Replace new axis developer and try to print
2. Solve print quality problem "Poor fusing (loose toner)" for Canon IRC-4580 printer. How to fix print quality problem loose toner
Description loose toner: Toner is not properly fixed on paper, use to hand rubbing lightly on the printed image toner powder may be stick in hand
Error location: toner cartridge or fuser unit

Cause of error "Dark Image or black" on the printed page:

When toner cartridge is empty. You toner refilled by toner powder ware not compatible. This is makes toner cartridge components demaged and temperature of fuser unit is not enough melt to toner powder

How to fix(repair)"Poor fusing (loose toner)" on the printed page for Canon IRC-4580 printer:

With this error, you should replace toner cartridge or fuser unit to fix it.
3. How to fix print quality problem "Uneven Density" for Canon IRC-4580 printe How to fix print quality problem Uneven Density
Description: The printed page has one half light and one half clear.
Error location: Toner cartridge, transfer roller, springs, doctor blade

Cause of error "Uneven Density":

- The pressure force on the left and right springs of the transfer roller is not even.
- May be toner low also causes this error
- Doctor blade has bent
How to repair error "Uneven Density" on the printed page for Canon IRC-4580 printer:
- Replace springs and transfer roller.
- Toner refill toner cartridge Canon IRC-4580 and reset toner cartridge chip (replace new chip) or replace new genuine toner cartridge.
- Replace doctor blade.
4. How to solve print quality problem "Light image" for Canon IRC-4580 printer How to fix print quality problem light image
Description: The printed image is all light and no Ghost.
Error location: Toner cartridge, Developer, HVPS board

Cause of error "Light image" on the printed page

- Enabled toner save.
- Toner cartridge is low
- OPC drum may be faulty by strong light intensity
- Temperature in room is below than 10*C
- Bad contact caused by the toner dirty between the high voltage terminal in the HVPS and the one in the set
- Abnormalities output from the HVPS

How to fix(repair) error "Light image" on the printed page for Canon IRC-4580 printer:

- Disable toner save by change in printer driver.
- Toner refill toner cartridge Canon IRC-4580 and reset toner cartridge chip (replace new chip) or replace new genuine toner cartridge.
- Replace the OPC drum.
- Replace developer.
- After printer is power on, wait 30 minutes then start printing
- Clean up the contact between the high voltage terminal in the HVPS and the one in the se- Replace the new HVPS if the problems are not solved by 4 away above.
5. How to fix print quality problem "Ghost" for Canon IRC-4580 printer How to fix print quality problem Ghost
Description: Ghost occurs intervals of the OPC drum or transfer roller.
Error location: Toner cartridge, Developer, HVPS board

Cause of error "Light image" on the printed page

- OPC drum has fauty.
- The life of the transfer roller has been expired
- The high voltage terminal is contaminated by toner powder or

How to fix(repair) error "Light image" on the printed page for Canon IRC-4580 printer:

- Replace OPC drum
- Replace transfer roller
- If performed 2 away and the error does not clear, you should replace ganuine toner cartridge .
- Replacce HVPS board.

Oct 29, 2016 | Canon Office Equipment & Supplies

1 Answer

Why am I getting vertical Yellow lines on my printing?


It sounds like the laser drum is damaged and not collecting toner correctly. First try cleaning the paper path with laser cleaning paper. If that doesn't sort the problem replace the drums.

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2 Answers

Vertical line on paper from top to bottom


In my experience if you refill the toner cartridge with the toners available in the market,though they are labelled"for Brother 2140" you get vertical dark patches on the paper. Once in a while you get good quality print too. Replacement with correct toner cartridge seems to the solution.

Oct 22, 2012 | Brother HL 2140 Laser Printer

1 Answer

When printing all black areas have vertical lines going through ,have cleaned print heads and changed toner - no change in quality.


Clean the encoder strip, the clear plastic band that runs behind the print carriage. A Q-tip damp with alcohol will wipe off any grease or ink. You'll find a grease spot just above the area on your print that has the vertical line.

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Lines in printing


...maybe its time to replace fuser fixing film!?

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Vertical black line on side of copies only when using autofeed


Clean the small piece of glass on the flat bed. Should be on the left side of the flat bed when you lift the doc feeder.

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1 Answer

Black Vertical Lines


This can be caused by a damaged fuser or drum try to change the cartridge and if that does not resolved the issue then its the fuser

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1 Answer

My fax Machine has lines going each page that prints out


Get a can of air, open the unit and blow it out.
Also, clean the glass.
That should help solve the problem

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1 Answer

Samsung CLP 510 light grey vertical streaks


you have 2 problem.
1). toner is bad
2). toner is low
change the toner should fix both porblem.
try to clean the roller while you have the toner out. (just in case).

Mar 27, 2008 | HP LaserJet 5p Printer

1 Answer

Consistent, faded and streaking vertical lines across entire page, from top to bottom.


Toner issue getting to drum - use gen toner cart.

or Drum blade stuffed (lines are down page fro top to bottom- replace drum assy

Drum has been exposed to light faint or blank across copies repeated 4 times down page - replace drum assy

or upper fuser roller stuffed, down page, smudgy print -  replace fuser

LSU(laser) or boards rarely cause issues

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