Brother MFC620CN Service Manual page 143

5.1.1 Draining the Ink from the Ink Tubes
-- Be sure to perform draining before removing the head/carriage unit, ink refill ASSY or engine unit. --
(1) Open the scanner cover (scanner unit) and pull out all four ink cartridges.
(2) As shown below, attach a piece of black vinyl adhesive tape to each of four dummy cartridges
to prevent the ink cartridge sensors from detecting ink near-empty.
Then load those dummy cartridges into the cartridge slots and close the scanner cover.
(3) Plug the power cord into an electrical outlet.
MFC620CN/245CN/420CN/410CN/215C/210C and FAX2440C
(4) Press the Menu/Set and Black Start keys. Next press the
machine enter the maintenance mode.
The "
TIP: FAX models equipped with numerical keypads can enter the maintenance mode in the
same way as conventional models; that is, by pressing the Menu/Set, *, 2, 8, 6 and 4 keys in
this sequence.
(5) Carry out "Initial purge" (with Function code 76) by pressing the 7, 6, 4 and Black Start keys.
For details, refer to
Scanner cover
(Scanner unit)
" appears on the LCD.
Chapter 8, Section 8.5.20 "Purging Operation."
5-5
Ink cartridges
Dummy
cartridges
Attach a piece of
black adhesive tape.
key four times to make the
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