IBM 6400 Maintenance Information Manual page 373

3. Press the ON LINE key on the rear control panel or the Start key on the
front control panel to put the printer in the READY state. The stacker
elevator will descend to its lowest position. (See Figure 64.)
Figure 64. Power Stacker in Print Position
4. Check that the paper is still centered between the paper guides.
5. Close the cabinet rear door.
6. If necessary, set Top Of Form.
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