Kodak 800 SERIES service manual Probable Defective Carriage PWA

NovaJet 800 Series Service Manual

Figure 4-98. Probable Defective Carriage PWA.

13.For inconsistent color output (color changes randomly or changes slowly down the print within the same color space), color print failures in all colors or prints, or no color print output then replace the appropriate carriage assembly (defective gate array I/C or driver I/C most likely). Ensure the 1x4 right and 1x4 left cartridge sets are utilized for isolating the defective carriage PWA. If problem shows up in both modes then the Main PWA or firmware is at fault. Both examples above are extremely rare.

NOTE: Do not replace electronic assemblies for microbanding symptoms. Normally the printer calibrations, select print mode, or cartridge failure causes 97% of the symptoms observed.

Figure 4-99. Defective Main PWA.

14.For specific test or calibration functions that fail to print or execute replace the Main PWA. Caution: do not use magnetic tipped screwdrivers around circuit assemblies as this is known to have caused Main PWA failures in the equipment. Refer to ‘Main PWA’ removal procedures in DISASSEMBLY.

Troubleshooting 4-92