Brother MP-21C Service Manual page 148

6. Close the top cover. Your printer will automatically carry out head
cleaning and become ready to print. When the printer is carrying out
head cleaning, all the LEDs blink alternately. It takes about 8 minutes
to finish the head cleaning, wait until the LEDs stop blinking.
!
Caution
Once you have installed a cartridge, DO NOT take it out until you
need to replace it with a new one, otherwise the print quality may be
reduced.
If the Ink LEDs ( (BC)LED and (MY)LED) and the
(Alarm) LED are on after you have installed the ink cartridges,
check that the ink cartridges are installed correctly.
If you take an ink cartridge out, do not re-use it.
The print head may be damaged if you install ink cartridges other than
Brother original or if you use refilled ink cartridges. You might void
your warranty.
Do not insert or remove ink cartridges while the printer is doing the
following;
*printing
*cleaning the print head (when all the LEDs are blinking in turn.)
*feeding or ejecting paper
When you insert ink cartridges, place the printer on a flat surface and
take care not to insert the ink cartridges upside down.
Use the ink cartridge up within 6 months after you installed it into the
printer.
It takes several minutes for the printer to clean its print head. DO
NOT turn off the printer when all the LEDs are blinking in turn.
After carried out head cleaning, sometimes ink stains the first print
page. We recommend you print a test page right after you have carried
out head cleaning.
12