HP Deskjet 842c Printer - Manual (Page 65)

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2 Clean the print cartridges
a. Dip a clean cotton swab into distilled water and squeeze
any excess water from the swab.
b. Grasp the black print cartridge by the colored cap.
c. Clean the face and edges of the print cartridge as shown.
DO NOT wipe the nozzle plate.
d. Hold the print cartridge up to the light to inspect for fibers
on the face and edges. If fibers are still present, repeat
steps 2a through 2c.
e. Repeat steps 2a through 2d with the tri-color print
cartridge using a clean, moistened cotton swab to avoid
any contamination.
3 Clean the print cartridge cradle
a. Position yourself at eye level with the printer.
b. Locate the cradle that holds the print cartridges, then
locate the three black, hook-shaped arms on the bottom
of the cradle.
c. Using clean, moistened swabs, wipe the flat surfaces
(shaded area) on the undersides of each arm from back to
front. Repeat until no ink residue is seen on a clean swab.
DO NOT clean
nozzle plate.
Clean here.