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Maintenance 3-8
NovaJet 800 Series Service Manual
Clean and Inspect Stepper Motor Gears
The stepper motor gears can become dirty after time (typically after 4-5 years of
operation) if not cleaned. Dirty gears can cause microbanding in the print. This will
reduce the quality of the output. Clean the motor gears with a stiff brush to knock off
any debris. A cotton swab soaked isopropyl alcohol can be used to remove any ink that
may have accumulated on the gears.
Clean and Inspect Main PWA
Foreign material on the Main PWA could short out electrical signals being developed on
the Main PWA and cause erroneous prints or even damage to the Main PWA. All
electrical circuits should be free of foreign material, especially those materials with
conductive properties.
Clean the Main PWA by blowing the objects away or gently brushing them aside with a
soft brush if required.
Inspect the Main PWA for any damage to the board, connections, or any of its compo-
nents . Replace the board if inspection reveals any damage or flaws that could affect its
function .
Clean and Inspect Carriage Assembly
Foreign material on the carriage assembly could short out signals being developed on the
carriage assembly and cause erroneous prints or even damage to the carriage assembly.
A very common problem occurs when ink has been spilled onto the carriage assembly.
All electrical circuits should be free of foreign material, especially those with conductive
properties.
Clean the carriage assembly by blowing the objects away or gently brushing them aside
with a soft brush if required. Be careful not to let anything to fall into the printer as you
clean or it could cause a new problem.
Inspect the carriage assembly for any damage to the boards, connections, or any of the
components on the assembly.