Why when page prints it has black ink blotches on it

use the maintance function on your printer to adjust the ink output level.

Are you using genuine inks or compatibles/refills? Have you cleaned / aligned the print heads recently? Does it only happen on the second print? Could be a case of excess ink getting onto the rollers which then get hot and deposit the ink on the next paper coming through.
Also make sure you've selected the correct paper type before printing.

Try cleaning the color or magenta cartridge with rubbing alcohol and look inside the printer to see if there's pooled ink anywhere that is smearing on the paper. Try replacing the print head or cartridge.

If you're getting spots on the prints, run the Remove Ink Smears routine in the maintenance. It will clear the ink from the preheater. User packing tape to pull dust off of pick rollers. It's easy to unclip the unit and roll it on a piece of tape to remove dust.

The voids and blotches can be a bad black pcu, the voids san also be toner on the glass slat obove the pcu,s there are 4 slats one for each color, on the pcu itself on the upper side is a narrow long opening, the glass slat is above this opening when the pcu is in the printer. It will take a flashlight to see any toner on the glass.
-Carl

Found bits of dust adherent to printer heads, took awhile to clean out with fine forceps, but seems fine now

so the ink cartridge head in hot water for 10 mins, That will dissolve the clot inside the print head. Smudges should be gone. Else get a new print cartridge.

you may need to replace the drum,

Hi, it sounds that your printer may require service to clean the printhead thourouly.

Tirzo

SOUNDS LIKE YOU ARE REFILLING YOUR OWN CART. THEY DO NOT WORK WITH BROTHER MACHINE, THE BROTHER MACGHINES ARE SET TO WORK WITH OEM PRODUCTS, CHANGE YOUR INK GOOD LUCK BROTHER TECH