Brother MFC640CW - Draining the Ink from the Ink Tubes

5-5 Confidential
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.
Dummy
cartridges
Scanner cover
(Scanner unit)
Ink cartridges
Attach a piece of
black adhesive tape.
(3) Plug the power cord into an electrical outlet.
MFC640CW/820CW
(4) Press the Menu/Set (Menu) and Black Start keys. Next press the
key four times to make
the machine enter the maintenance mode.
The "
" appears on the LCD.
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 (Menu), *, 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 Chapter 8, Section 8.4.20 "Purging Operation."