Question about HP Deskjet F340 All-In-One Printer

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Help with scanner!

My scanner wont scan anything and it appears with magenta and pinkish colors.

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Is it plugged into a power strip?





Posted on Aug 19, 2008

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My brother MFC 665CW printer shows a 4F error and unable to clean. How do I get to the head to clean it?


Do the following to clean the print head:


1. Press INK key on the control panel.


2. Press the DOWN arrow key until CLEANING appears on the LCD.


3. Press OK.


4. Press the DOWN arrow key to select BLACK, COLOR or ALL depending on what you want to clean.


5. Press OK.


The machine will clean the print head. When cleaning is finished, the machine will go back to Ready automatically. If you are experiencing a print quality issue, we recommend you repeat the print head cleaning for each color showing an issue at least five (4) times.


If you are experiencing a print quality issue and want to see if the cleanings are improving the print quality, print a Print Quality Check Sheet (PQCS) after the first cleaning and then print another PQCS after repeating the print head cleaning steps at least three (3) more times (4 total cleanings). You can then compare the two Print Quality Check Sheets.


Do the following to print a Print Quality Check Sheet:


1. Press INK key on the control panel. TEST PRINT will appear on the LCD.


2. Press OK. PRINT QUALITY will appear on the LCD.


3. Press OK.


4. Press COLOR START.


NOTE: The machine will generate the Print Quality Check Sheet (PQCS). On the PQCS each of the four colors is represented by a slanted square pattern made up of 96 individual blocks. The colors should appear (from left to right): Black - Yellow - Cyan - Magenta. Cyan is the light blue color and Magenta is the pinkish color.

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1 Answer

HP COLOR LASERJET CP 3505 N PRINTER: Magenta toner is light in color.tryed changing the...


Known problem with this machine the fan is located next to the magenta laser scanner at the base of the machine. this fan blows dust on to the scanner lenses and makes the prints light. Needs to be taken apart and cleaned. take it to a local service center if they know what they are doing should be less then an hour.

May 18, 2010 | HP COLOR LASERJET CP 3505 N PRINTER

1 Answer

Magenta Cartridge


I have just found a solution on the hp support forum that says:-

Common problem of scanner optics dusted over requiring removing the laser/scanner, uncovering and cleaning mirrors and lenses. See the attached procedure. Takes about an hour, no parts.

On the second message on the following link you will see an attachment that has instructions for the above.

http://forums11.itrc.hp.com/service/forums/bizsupport/questionanswer.do?admit=109447626+1217848263789+28353475&threadId=1182873

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Actually magenta is the weakest compared to cyan and
yellow using even K3 inks. Now epson is releasing
K3 with vivid magenta ink. Using any color management
I have found it very difficult to reach a real red without
a lot of tweaking in my color profiles. Now it appears
that Epson sees the problem and is changing magenta
out for vivid magenta ink to solve the weak magenta.

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Lines on side of pages when printing color


What is the machine model number???

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MFC-9840 prints vertical stripe ~2" from right edge on all color printouts


Hi,
The first thing i would try to do is clean the corona wire on the drum unit. It might also be a faulty magenta cartridge.

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