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(18) Replace the current Waste Ink Cartridge with the Waste Ink Cartridge that had been used by the customer. Make this operation for all the Filter Cartridges.that seals the hole, and then insert the Filter Cartridge into the Ink Cartridge Slot again. (17) Remove one Filter Cartridge from the Ink Cartridge Slot, then remove the adhesive tape, etc. (16) Turn off GT-541, and then open the Front Cover. (15) When the Tube cleaning is finished for all colors, check that the Filter Cartridges are inserted in all the Ink Cartridge Slots. One Cleaning Cartridge can be used for two colors.(14) When the Tube cleaning is finished, leave the Filter Cartridge in the Black Ink Cartridge Slot, and then perform the Tube cleaning for other colors by repeating step (9) to (13). (13) When the Tube cleaning is finished, replace the Cleaning Cartridge with the Filter Cartridge again, and then perform the Tube cleaning.
![brother gt 541 platen brother gt 541 platen](http://www.digitsmith.com/attachments/23047d1372525519-brother-gt-541-imag0208.jpg)
Press the OK Button to perform the Tube cleaning. (12) The following message is displayed after the performance of step (10) is finished. (11) When the Tube cleaning is finished, replace the Filter Cartridge with the Cleaning Cartridge. (10) Press the Up/Down Button to select "Black", and then press the OK Button. The procedure is the same for other colors.
![brother gt 541 platen brother gt 541 platen](https://i.ebayimg.com/images/g/u2IAAOSwnRpflzCV/s-l300.jpg)
(3) Make sure GT-541 is not in the middle of any operation. (1) Seal the hole on the Filter Cartridge with adhesive tape, etc.