HP is cutting off or streaking black text in Normal or Draft mode. I have changed the print heads, ink cartridges etc. and gone through all the diagnostics many times. What is weird is that the documents I print always mess up the same lines in the same way and print the other lines perfectly. If I go to Best mode it prints the same documents fine also. The Best mode is just way to slow for home office use.
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Re: HP L7680 Print Problem
In this case what i would request u to do is....... Take out both the catridges from the Printer......... Take 2 Paper Towels one should be wet with Luke warm water and the other one should be dry........... Take the Colour catridge first turn it upside down and u will see a small copper plate on the catridge from where the ink comes out....... Place the wet paper towel using ur thumb on the Copper plate and press it a lit bit for 10 Seconds...... Now remove it and see whether u see any ink on the paper towel.......... U should see some ink on it now place the dry paper towel on the ink catridge in the same way........ Now do the same procedure again.......... Do the same procedure twice on the Black Catridge................. Now take the dry paper towel and turn the direction of the cartridge so that u can see a Copper plate on it with small boxes just clean that copper plate with the Dry Paper Towel.......... Know insert both the catridges inside the Printer.. Good Luck
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Select EconoFast or Draft as the print quality setting in the printer properties. This will prevent the color cartridge from being used.
- Or -
Try another color cartridge. The color cartridge is used to print grayscale images in Normal or Best print modes, so if one color has run out, the printout will have the wrong tint. With a full color cartridge, the colors can be properly combined to create a composite black.
When printing with Normal or Best as the print quality setting, the HP Deskjet 710C or 720C or 722C series printer will use the color ink to improve print quality output, even when printing a grayscale image.
The HP DeskJet 6122 can print with both or only one ink cartridge installed. The printer driver includes an option to print in gray scale as a substitution for color. If you choose to print a document that has a color other than black and white with only a black cartridge installed, I recommend you select the gray scale print option. To select gray scale, select the printer properties and check the box for gray scale rather than color printing. This selection can be made either at the time a document is ready to print (ie., a one time selection, using the "Properties" box in the print options window), OR as a permenant setting using the Control Panel, Printers, HP DeskJet 6122, "Properties" window. Once changed in the general printer properties, these settings remain active anytime the HP DeskJet 6122 printer is selected to print a document.
Ink is a lubricant for the print heads. Some color ink is used even if you only print in black or vice-versa. If you printed with black ink missing, you could destroy that print head from the friction of running without ink to lubricate it. That's why most printers won't allow you to print with black ink missing even if you aren't using it. That's the case with your Canon printer.
If you allow a color to go empty, the residual ink in the head could clog and become permanently blocked. You would never be able to print that color again. So always replace ink cartridges as soon as they are empty.
whenever you print greyscale what actually happen is that the printer mixes the red, blue and yellow to give the output in gray scale. See if you mix red, blue and yellow ink in the right proportion it gives you very close to black. just try to print your greyscale with your black ink finished you will still get the same print quality as when the black has ink in it. Or find a way seal the nuzzle of the black in and print your greyscale. check what results.
On the printer driver, (after click "print" and the menu for selecting the printer appears and you can select the number of copies etc...go to"properties") .
Here go to the "Color" tab.. if you truly only want to use black ink, then select "Print in greyscale" and select "Black only". After that just Click "OK" at the bottom and "Ok" to print your job in truly just black ink. :)
three options to be checkout.
1)the cartridge ink is near to empty.if this is the case get your cartridge refilled or replace it with new.
2)the head unit in which the cartridges r installed.in that head the holes from where the ink comes out may be blocked so it needs cleaning manually by removing the head.
3)or the third option the printout is set on draft mode .if this is the case go to printer properties and change that draft setting to normal mode printing.
I only use refill HP inks. When the cartridge prints gray instead of sharp black it means the ink well is clogged. Yes, that can happen on a new cartridge. Sometimes it happens when they put too much ink in the cartridge, or even heat can make it not work. Also streaking black lines is the problem of the ink not coming out properly. Easiest thing to do is go to a refill station like Cartridge World and have them test it or clean it out. You can also make sure the printer, not the cartridge is clean. Ink builds up an pools. Get some Q-Tips and clean up all that spilled ink. Sometimes in the software it says you can clean the print head, do that too.