IBM 6400-I15 Maintenance Manual - Page 32
Cleaning the Hammer Tips, Vacuum up any residue.
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ATTENTION The thin plate (ribbon mask) of the hammer bank cover assembly is fragile. Be careful not to over-bend or kink the ribbon mask when handling and cleaning the hammer bank cover assembly. 7. Using a clean soft cloth, wipe the hammer bank cover and ribbon mask to remove lint, ink, and paper residue. Clean the holes in the cover strips. Carefully wipe between the hammer bank cover and the ribbon mask (early models). ATTENTION Do not use any solvents or liquids to clean the hammer tips. Clean the hammer tips gently-too much pressure can chip hammer tips. 8. Using a stiff, non-metallic brush (such as a toothbrush), gently brush the hammer tips to remove lint and ink accumulations. (See Figure 6.) Vacuum up any residue. Hammer Tip NOTE: 6400-004/04P hammer bank shown. Procedure is the same for all hammer banks. Figure 6. Cleaning the Hammer Tips ATTENTION The hammer bank contains a strong magnet. To prevent damage to the hammer tips, do not let the hammer bank cover assembly snap into place as the hammer bank magnet attracts it. Any impact of the cover against the hammer bank can break hammer tips. 9. Install the hammer bank / ribbon mask cover assembly (page 206). 10. Install the shuttle frame assembly (page 249). 11. Install the shuttle cover assembly (page 209). 12. Clean the card cage fan assembly, as described below. 32 Preventive Maintenance