IBM 6400-I15 Maintenance Manual - Page 127
Shuttle noisy, m. Torque the center captive 5/32 inch socket head
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4. Check the platen gap. Adjust the platen gap. 5. Inspect the ribbon mask for bends or deformation that snag and interfere with shuttle movement. Make sure the hammer bank cover assembly is correctly installed on its mounting pegs. Reinstall the hammer bank cover assembly. Replace a damaged or deformed hammer bank cover assembly. 6. Check continuity of the shuttle motor drive cable assembly. Replace shuttle motor drive cable assembly if it fails continuity test. 7. Power up the printer. Run a Shuttle Slow or Shuttle Fast test. If the shuttle does not move, replace the shuttle frame assembly. 8. Power up the printer. Run a Shuttle Slow or Shuttle Fast test. If the shuttle does not move, replace the power supply board. 9. Power up the printer. Run a Shuttle Slow or Shuttle Fast test. If the shuttle does not move, replace the CMX controller board. Shuttle is noisy 1. Check the bolts securing the mechanism base to the base pan. Tighten the mechanism base mounting bolts if they are loose enough to permit movement of the mechanism base. 2. Remove the shuttle cover. Check the shuttle frame assembly mounting/clamp screws for looseness. Torque the 5/32 inch socket head clamp screws to 20 ± 2 inch-pounds (2.26 ± 0.23 NSm). Torque the center captive 5/32 inch socket head screw to 20 ± 2 inch-pounds (2.26 ± 0.23 NSm). 3. Inspect the shuttle area for loose hardware. Tighten loose hardware. 4. Check that the hammer bank cover assembly is correctly installed, that it has not slipped off the mounting pegs. Check that the ribbon mask has not partially separated from the hammer bank cover. Check for debris trapped between the ribbon mask, hammer bank cover, and hammer bank. Troubleshooting 127