There are long axis print voids. Does the print head need to be replaced?

Increase RAM size(64 or 128MB), your print sizes are more...

Take print out of configure page, check the usage of paper axis, spit on,carriage,service station, and others includes FW.. identify which was crossed beyond 100%,replace them..update FW..confirm once be fore replacing the spares...

In many cases after a printer has not been used for a long period of time, the ink will become dry. Most printers will have a "Clean print heads" option. Also trying to print a page or two may resolve the issue.
If it continues however, the printer may need replaced. Dried ink can block the print heads and in some cases can not be unblocked without taking the printer apart, which will void the warranty.

You said you just replaced the ink jets. Did you clean the print heads? Here is Link on Web. If you find this helpful pls rate me. Thanks
http://www.brother-usa.com/ModelDocuments/Consumer/Users%20Manual/UM_MFC_210C_420CN_EN_286.PDF

How to improve print quality
Cleaning the print head
To ensure good print quality, the MFC will regularly clean the print
head. You can start the cleaning process manually if needed.
Clean the print head and ink cartridges if you get a horizontal line in
the text or graphics on your printed pages. You can clean Black only
or three colors at a time (Cyan/Yellow/Magenta), or all four colors at
once.
Cleaning the print head consumes ink. Cleaning too often uses ink
unnecessarily.
Caution
Do NOT touch the print head. Touching the print head may cause
permanent damage and may void the print head’s warranty.
1 Press Ink.
2 Press ▲ or ▼ to select Cleaning.
Press Menu/Set.
3 Press ▲ or ▼ to select Black, Color or All.
Press Menu/Set.
The MFC will clean the print head. When cleaning is finished,
the MFC will go back to standby mode automatically.
If you clean the print head at least five times and the print has
not improved, call Brother Customer Service (see Brother
numbers on page i).

That is a print head tilt or X-Y axis fault.
1 of three things causes it to not move.
1 there is a stainless steel print head block that fills up with the ink that runs out of the maintenance tray. Mostly because the printer is not sitting level. But it needs to be cleaned.
2, The print head wiper blade has tacked to the print head, or 3, The wiper blade clutch has failed.

Hi jo47628:
Here is your problem:

7,010.43: The printhead is stuck in the tilted position, or is not able to tilt forward to
the print position, due to problems.

1. Reboot the printer.
2. Did this correct the problem?
Complete. Go to Step 2.
2 1. Do the printhead lock arms rotate correctly? Go to Step 3. Repair/replace
the lock arms.
3 1. Has ink spilled ink around the printhead that
prevents the printhead from moving to its
center position? You should be able to
manually push the printhead right to left.
Clean the
printhead area.
Go to Step 4.
4 1. Does the X-axis motor drive the printhead to
it’s center position (so it can tilt forward)?
Go to step 5. Troubleshoot
the X-axis
drive.
5 1. Check the process gearbox for obstructions
or damaged.
2. Ensure the gears are correctly aligned and
homed.
3. Verify the process shaft and drive module
shaft are at their home positions.
4. Did this correct the problem?
Complete. Go to Step 6.
6 1. Has ink spilled on the head tilt gear on its
drive train (near left side of the printhead).
Clean the
gears.
Go to Step 7.
7 1. Use service diagnostics to run the Head
Maintenance Wiper Clutch test.
2. Did the test fail?
Replace the
wiper drive
clutch.
Go to Step 8.
8 1. Ensure the wiper is properly aligned.
2. Use service diagnostics to run the Wiper
Drive Test.
3. Did the test fail?
Replace the exit
module
assembly.
Go to Step 9.
9 1. Use service diagnostics to run the Load
Maintenance Clutch test.
2. Did the test fail?
Inspect the
maintenance
drive system,
replace any
defective parts.
1. Verify the headtilt gear will engage. You can
manually set the headtilt gear.
2. Is the gear engaged properly?
Go to Step 11. Set the headtilt
gear.
11 1. Use service diagnostics to run the Tilt Axis
Drive test.
2. Did the test fail?
Replace the
process
gearbox.
Go to Step12.
12 1. Use service diagnostics to run the Process
Motor test.
2. Did the test fail?
Replace the process motor.
Hope this helps

That is a print head tilt or axis failure.
There are 2 problems that cause that 95 percent of the time.
1 is a stainless steel pivot block on the left side frame that gets filled with overflow ink. Needs cleaned.
2. The print head wiper blade is stuck to the print head due to shuting it down improperly or a power failure.

I had the same problem with my X52 and searched high and low on the internet for a solution. What I did was pop the base off and found a loose connection on the x-axis wires. I re-routed both the x and y axis contact wires underneath the p/s2 port and put it back together. Seems to be working fine now. I will not that opening up the controller will void your warranty and it also could be possible that your x-axis problem could stem from something completely different from what was wrong with mine. You may contact me if you need any help with it. mynameisbob AT gmail DOT com.

Yep.
That code is caused from the print head not being able to move freely either front to back or on the X-Y axis motor.
the 2 most likely problems are, 1 the stainless steel print block, located on the left side of the machine looking from the front, is contaminated with spill over ink. It is located about midway back on the lower part of the frame. Need to remove and clean it. 2. The wiper blade is tacked to the front of the print head, between the print head and the drum. Needs to be carefully loosened off the print head.
The print head cables could be to tight, the wiper clutch could be failing or the process drive motor may need timed. But the first two items I mentioned are the most likely cause.
That code pops up when the print head can not freely move .

Replacing the pring head.
1. Remove the side covers.
2. Remove the ink loader assembly. There are 2 connectors on the ink loader. SO remove it slowly.
3. Remove the spring guides on the print head. One on each side, Held in my one torx screw.
4. Remove the spring bracked assembly on the left side of the printer, it puts pressure on the XY axis motor to position the print head. Just pop it off and position it up and to the left of the bracket.
5. Remove the steel square block on the left bottom side of the frame.
6. Unplug the harness and ribbon cables and then from the back of the printer, remove the print head, be careful not to hit the drum.
Install the print head, the ribbon cables are somewhat difficult to plug back in, Just be patient. and make sure they are conneted firmly. Also when replacing the cables and harness, be sure they are routed corectly so the print head does not get bound on them.
Set the print head into position and install the steel block, then the spring bracket on the XY motor, then the spring brackets in the proper positions. Dont forget to put that spring bracket back on, It is easy to over look.
Make sure all things are plugged in on the print head.
Next reinstall the ink loader, make sure all connectors are connected.
Install the covers and you are done.
Take your time, probably should take about an hour. Just to it carefully and methodically.