Kodak 800 SERIES service manual Defective Carriage PWA Color Test

NovaJet 800 Series Service Manual

Figure 4-34. Defective Carriage PWA (Color Test).

15.Inspect and clean stepper motor and lower roller drive gears if printer is older than 5 years. (Every two years if printer is used for textile printing.) Other unique microbanding causes include synchronization errors from the stepper drive system due to defects or gear cleanliness.

Figure 4-35. Defective Stepper Motor.

16.Replace stepper motor for consistently spaced horizontal patterns (2 - 10 mm apart) when printer is run in the enhanced modes with a test print. Often a lower roller drive noise will accompany the banding. Inspect stepper motor gearing/lower roller for damage/debris (ensure screws are tight). Check stepper motor winding resistance (7.2-8.0 ohms; check full 360-degree rotation)

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