HP 51640/51645/51650
Deskjet 700/800/900/1000 Series, 1200C, 1600C
1. Turn the cartridge upside down. Remove the small round black cover and push in the ball bearing which is used to seal the filling hole.
2. Slowly inject up to 40ml. of ink into the cartridge. Be careful not to puncture the foil bag that is inside the cartridge.
3. Seal the filling hole by squeezing the cartridge sides and inserting the set screw provided, ensuring that the screw is in far enough to be flush with the cartridge. Cover the set screw with the aluminum tape provided. (Ink may leak from the print head).
4. Place the cartridge print head down, on absorbent paper. This will draw out any excess ink and equalize pressure in cartridge.
5. Place the cartridge back into the printer and run the cleaning cycle as instructed by your printer instructions. This may take several cycles to return the cartridge to good printing order.
6. Rinse the syringe with warm water and dry for future use.