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Troubleshooting 4-25
NovaJet 800 Series Service Manual
Figure 4-11. Stall Configuration.
Ensure the left or right Carriage PWA is tested properly.
15. Replace the Main PWA only if a specific test pattern,
calibration, or jet sequence fails to print. Magnetic tipped
screwdrivers are known to have caused these types of Main
PWA failures in the past. Please exercise caution when
handling circuit assemblies and always attach an electrostatic
discharge (ESD) wrist strap. Refer to Disassembly.
Common Misfire Problems
Cartridge electrical contacts may have oil or ink on surface (clean
with isopropyl alcohol). See illustration below for an example of a
defective magenta cartridge.
Figure 4-12. Magenta Cartridge Misfires.
Carriage assembly flex driver cable may have ink or debris on
contacts (clean with alcohol).