Kodak 800 SERIES Camcorder User Manual


 
Troubleshooting 4-74
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