Kodak 800 SERIES service manual Ink Starvation, Inkjet Nozzle Problems

NovaJet 800 Series Service Manual

Inkjet Nozzle Problems

-Resistor burnout - no firing (175 million firings average per resistor). Severe clogging may be cleared using ultrasonic cleaner (30-40 sec) or hot water (10-15 sec).

Ink Starvation

Ink starvation of one or more colors can occur between 10 minutes and 3 hours of operation due to improper system setup or a defective ink delivery system (air leak in the system). Check pressure in the lines by initiating a Color Test in the 2 pass print mode. Repeat test several times to verify pressure. All swaths in each color should print at 100% ink density from the 2-pass print configuration (50% ink load on each pass). If the starvation stops and starts as the color test progresses (i.e. the first swath starts to print then starves, the second swath prints and then also starves) then the cartridge most likely does not have enough ink inside (typically the cartridge should have between 15 and 30 ml of ink; car- tridge ink level will eventually stabilize at 19 ml). Check cartridge ink level using the syringe and syringe tip provided with the printer. For all other color test printing failures please refer to the failure analysis checks below.

Figure 4-54. Magenta Ink Pressure Failure.

Troubleshooting 4-52