Kodak 800 SERIES service manual Main PWA Trailing Cable Connection

NovaJet 800 Series Service Manual

Figure 4-76. Main PWA Trailing Cable Connection.

9.For erratic carriage movement at power up reseat the trailing cables and encoder sensor cable connections at the right carriage PWA. Reseat trailing cables at the Main PWA jacks. Ensure all ZIF (zero insertion force) connections are locked.

10.Verify servo motor resistance values with an ohmmeter or multimeter. The resistance should be 2-8 ohms (1.5 to 30 ohms is acceptable). Replace servo motor if values are out of tolerance. Measure brush resistance across servo motor windings to verify a short does not exist - replace servo motor if new trailing cable does not fix carriage axis error. There is no way to verify faulty bearings other than grinding when the shaft is turned. The typical motor will last approximately 2800 plot hours (2.8 million servo cycles). The brushes or bearings may fail. Replace motor at 4000 plot hours in accordance with prescribed routine maintenance.

11.Check slide shaft profile/carriage head height adjustment; verify/ perform both alignments. Refer to alignments. A severely bent slide shaft (upwards) or low carriage head height can cause carriage axis failures or head strike.

12.Replace trailing cables assembly. Refer to disassembly.

13.Replace servo motor if carriage head advances only a few inches

Troubleshooting 4-74